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Diffstat (limited to 'libraries/vital2000/prmtvs_b.vhdl')
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1 files changed, 5622 insertions, 0 deletions
diff --git a/libraries/vital2000/prmtvs_b.vhdl b/libraries/vital2000/prmtvs_b.vhdl new file mode 100644 index 0000000..c015e62 --- /dev/null +++ b/libraries/vital2000/prmtvs_b.vhdl @@ -0,0 +1,5622 @@ +------------------------------------------------------------------------------- +-- Title : Standard VITAL_Primitives Package +-- : $Revision: 600 $ +-- : +-- Library : VITAL +-- : +-- Developers : IEEE DASC Timing Working Group (TWG), PAR 1076.4 +-- : +-- Purpose : This packages defines standard types, constants, functions +-- : and procedures for use in developing ASIC models. +-- : Specifically a set of logic primitives are defined. +-- : +-- ---------------------------------------------------------------------------- +-- +-- ---------------------------------------------------------------------------- +-- Modification History : +-- ---------------------------------------------------------------------------- +-- Version No:|Auth:| Mod.Date:| Changes Made: +-- v95.0 A | | 06/02/95 | Initial ballot draft 1995 +-- v95.1 | | 08/31/95 | #204 - glitch detection prior to OutputMap +-- ---------------------------------------------------------------------------- +-- v95.2 | ddl | 09/14/96 | #223 - single input prmtvs use on-detect +-- | | | instead of glitch-on-event behavior +-- v95.3 | ddl | 09/24/96 | #236 - VitalTruthTable DataIn should be of +-- | | | of class SIGNAL +-- v95.4 | ddl | 01/16/97 | #243 - index constraint error in nbit xor/xnor +-- v99.1 | dbb | 03/31/99 | Updated for VHDL 93 +-- ---------------------------------------------------------------------------- + +LIBRARY STD; +USE STD.TEXTIO.ALL; + +PACKAGE BODY VITAL_Primitives IS + -- ------------------------------------------------------------------------ + -- Default values for Primitives + -- ------------------------------------------------------------------------ + -- default values for delay parameters + CONSTANT VitalDefDelay01 : VitalDelayType01 := VitalZeroDelay01; + CONSTANT VitalDefDelay01Z : VitalDelayType01Z := VitalZeroDelay01Z; + + TYPE VitalTimeArray IS ARRAY (NATURAL RANGE <>) OF TIME; + + -- default primitive model operation parameters + -- Glitch detection/reporting + TYPE VitalGlitchModeType IS ( MessagePlusX, MessageOnly, XOnly, NoGlitch); + CONSTANT PrimGlitchMode : VitalGlitchModeType := XOnly; + + -- ------------------------------------------------------------------------ + -- Local Type and Subtype Declarations + -- ------------------------------------------------------------------------ + --------------------------------------------------------------------------- + -- enumeration value representing the transition or level of the signal. + -- See function 'GetEdge' + --------------------------------------------------------------------------- + TYPE EdgeType IS ( 'U', -- Uninitialized level + 'X', -- Unknown level + '0', -- low level + '1', -- high level + '\', -- 1 to 0 falling edge + '/', -- 0 to 1 rising edge + 'F', -- * to 0 falling edge + 'R', -- * to 1 rising edge + 'f', -- rising to X edge + 'r', -- falling to X edge + 'x', -- Unknown edge (ie U->X) + 'V' -- Timing violation edge + ); + TYPE EdgeArray IS ARRAY ( NATURAL RANGE <> ) OF EdgeType; + + TYPE EdgeX1Table IS ARRAY ( EdgeType ) OF EdgeType; + TYPE EdgeX2Table IS ARRAY ( EdgeType, EdgeType ) OF EdgeType; + TYPE EdgeX3Table IS ARRAY ( EdgeType, EdgeType, EdgeType ) OF EdgeType; + TYPE EdgeX4Table IS ARRAY (EdgeType,EdgeType,EdgeType,EdgeType) OF EdgeType; + + TYPE LogicToEdgeT IS ARRAY(std_ulogic, std_ulogic) OF EdgeType; + TYPE LogicToLevelT IS ARRAY(std_ulogic ) OF EdgeType; + + TYPE GlitchDataType IS + RECORD + SchedTime : TIME; + GlitchTime : TIME; + SchedValue : std_ulogic; + CurrentValue : std_ulogic; + END RECORD; + TYPE GlitchDataArrayType IS ARRAY (NATURAL RANGE <>) + OF GlitchDataType; + + -- Enumerated type used in selection of output path delays + TYPE SchedType IS + RECORD + inp0 : TIME; -- time (abs) of output change due to input change to 0 + inp1 : TIME; -- time (abs) of output change due to input change to 1 + InpX : TIME; -- time (abs) of output change due to input change to X + Glch0 : TIME; -- time (abs) of output glitch due to input change to 0 + Glch1 : TIME; -- time (abs) of output glitch due to input change to 0 + END RECORD; + + TYPE SchedArray IS ARRAY ( NATURAL RANGE <> ) OF SchedType; + CONSTANT DefSchedType : SchedType := (TIME'HIGH, TIME'HIGH, 0 ns,0 ns,0 ns); + CONSTANT DefSchedAnd : SchedType := (TIME'HIGH, 0 ns,0 ns, TIME'HIGH,0 ns); + + -- Constrained array declarations (common sizes used by primitives) + SUBTYPE SchedArray2 IS SchedArray(1 DOWNTO 0); + SUBTYPE SchedArray3 IS SchedArray(2 DOWNTO 0); + SUBTYPE SchedArray4 IS SchedArray(3 DOWNTO 0); + SUBTYPE SchedArray8 IS SchedArray(7 DOWNTO 0); + + SUBTYPE TimeArray2 IS VitalTimeArray(1 DOWNTO 0); + SUBTYPE TimeArray3 IS VitalTimeArray(2 DOWNTO 0); + SUBTYPE TimeArray4 IS VitalTimeArray(3 DOWNTO 0); + SUBTYPE TimeArray8 IS VitalTimeArray(7 DOWNTO 0); + + SUBTYPE GlitchArray2 IS GlitchDataArrayType(1 DOWNTO 0); + SUBTYPE GlitchArray3 IS GlitchDataArrayType(2 DOWNTO 0); + SUBTYPE GlitchArray4 IS GlitchDataArrayType(3 DOWNTO 0); + SUBTYPE GlitchArray8 IS GlitchDataArrayType(7 DOWNTO 0); + + SUBTYPE EdgeArray2 IS EdgeArray(1 DOWNTO 0); + SUBTYPE EdgeArray3 IS EdgeArray(2 DOWNTO 0); + SUBTYPE EdgeArray4 IS EdgeArray(3 DOWNTO 0); + SUBTYPE EdgeArray8 IS EdgeArray(7 DOWNTO 0); + + CONSTANT DefSchedArray2 : SchedArray2 := + (OTHERS=> (0 ns, 0 ns, 0 ns, 0 ns, 0 ns)); + + TYPE stdlogic_table IS ARRAY(std_ulogic, std_ulogic) OF std_ulogic; + + CONSTANT InitialEdge : LogicToLevelT := ( + '1'|'H' => 'R', + '0'|'L' => 'F', + OTHERS => 'x' + ); + + CONSTANT LogicToEdge : LogicToEdgeT := ( -- previous, current + -- old \ new: U X 0 1 Z W L H - + 'U' => ( 'U', 'x', 'F', 'R', 'x', 'x', 'F', 'R', 'x' ), + 'X' => ( 'x', 'X', 'F', 'R', 'x', 'X', 'F', 'R', 'X' ), + '0' => ( 'r', 'r', '0', '/', 'r', 'r', '0', '/', 'r' ), + '1' => ( 'f', 'f', '\', '1', 'f', 'f', '\', '1', 'f' ), + 'Z' => ( 'x', 'X', 'F', 'R', 'X', 'x', 'F', 'R', 'x' ), + 'W' => ( 'x', 'X', 'F', 'R', 'x', 'X', 'F', 'R', 'X' ), + 'L' => ( 'r', 'r', '0', '/', 'r', 'r', '0', '/', 'r' ), + 'H' => ( 'f', 'f', '\', '1', 'f', 'f', '\', '1', 'f' ), + '-' => ( 'x', 'X', 'F', 'R', 'x', 'X', 'F', 'R', 'X' ) + ); + CONSTANT LogicToLevel : LogicToLevelT := ( + '1'|'H' => '1', + '0'|'L' => '0', + 'U' => 'U', + OTHERS => 'X' + ); + + -- ----------------------------------- + -- 3-state logic tables + -- ----------------------------------- + CONSTANT BufIf0_Table : stdlogic_table := + -- enable data value + ( '1'|'H' => ( OTHERS => 'Z' ), + '0'|'L' => ( '1'|'H' => '1', + '0'|'L' => '0', + 'U' => 'U', + OTHERS => 'X' ), + 'U' => ( OTHERS => 'U' ), + OTHERS => ( OTHERS => 'X' ) ); + CONSTANT BufIf1_Table : stdlogic_table := + -- enable data value + ( '0'|'L' => ( OTHERS => 'Z' ), + '1'|'H' => ( '1'|'H' => '1', + '0'|'L' => '0', + 'U' => 'U', + OTHERS => 'X' ), + 'U' => ( OTHERS => 'U' ), + OTHERS => ( OTHERS => 'X' ) ); + CONSTANT InvIf0_Table : stdlogic_table := + -- enable data value + ( '1'|'H' => ( OTHERS => 'Z' ), + '0'|'L' => ( '1'|'H' => '0', + '0'|'L' => '1', + 'U' => 'U', + OTHERS => 'X' ), + 'U' => ( OTHERS => 'U' ), + OTHERS => ( OTHERS => 'X' ) ); + CONSTANT InvIf1_Table : stdlogic_table := + -- enable data value + ( '0'|'L' => ( OTHERS => 'Z' ), + '1'|'H' => ( '1'|'H' => '0', + '0'|'L' => '1', + 'U' => 'U', + OTHERS => 'X' ), + 'U' => ( OTHERS => 'U' ), + OTHERS => ( OTHERS => 'X' ) ); + + + TYPE To_StateCharType IS ARRAY (VitalStateSymbolType) OF CHARACTER; + CONSTANT To_StateChar : To_StateCharType := + ( '/', '\', 'P', 'N', 'r', 'f', 'p', 'n', 'R', 'F', '^', 'v', + 'E', 'A', 'D', '*', 'X', '0', '1', '-', 'B', 'Z', 'S' ); + TYPE To_TruthCharType IS ARRAY (VitalTruthSymbolType) OF CHARACTER; + CONSTANT To_TruthChar : To_TruthCharType := + ( 'X', '0', '1', '-', 'B', 'Z' ); + + TYPE TruthTableOutMapType IS ARRAY (VitalTruthSymbolType) OF std_ulogic; + CONSTANT TruthTableOutMap : TruthTableOutMapType := + -- 'X', '0', '1', '-', 'B', 'Z' + ( 'X', '0', '1', 'X', '-', 'Z' ); + + TYPE StateTableOutMapType IS ARRAY (VitalStateSymbolType) OF std_ulogic; + -- does conversion to X01Z or '-' if invalid + CONSTANT StateTableOutMap : StateTableOutMapType := + -- '/' '\' 'P' 'N' 'r' 'f' 'p' 'n' 'R' 'F' '^' 'v' + -- 'E' 'A' 'D' '*' 'X' '0' '1' '-' 'B' 'Z' 'S' + ( '-','-','-','-','-','-','-','-','-','-','-','-', + '-','-','-','-','X','0','1','X','-','Z','W'); + + -- ------------------------------------------------------------------------ + TYPE ValidTruthTableInputType IS ARRAY (VitalTruthSymbolType) OF BOOLEAN; + -- checks if a symbol IS valid for the stimulus portion of a truth table + CONSTANT ValidTruthTableInput : ValidTruthTableInputType := + -- 'X' '0' '1' '-' 'B' 'Z' + ( TRUE, TRUE, TRUE, TRUE, TRUE, FALSE ); + + TYPE TruthTableMatchType IS ARRAY (X01, VitalTruthSymbolType) OF BOOLEAN; + -- checks if an input matches th corresponding truth table symbol + -- use: TruthTableMatch(input_converted_to_X01, truth_table_stimulus_symbol) + CONSTANT TruthTableMatch : TruthTableMatchType := ( + -- X, 0, 1, - B Z + ( TRUE, FALSE, FALSE, TRUE, FALSE, FALSE ), -- X + ( FALSE, TRUE, FALSE, TRUE, TRUE, FALSE ), -- 0 + ( FALSE, FALSE, TRUE, TRUE, TRUE, FALSE ) -- 1 + ); + + -- ------------------------------------------------------------------------ + TYPE ValidStateTableInputType IS ARRAY (VitalStateSymbolType) OF BOOLEAN; + CONSTANT ValidStateTableInput : ValidStateTableInputType := + -- '/', '\', 'P', 'N', 'r', 'f', + ( TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, + -- 'p', 'n', 'R', 'F', '^', 'v', + TRUE, TRUE, TRUE, TRUE, TRUE, TRUE, + -- 'E', 'A', 'D', '*', + TRUE, TRUE, TRUE, TRUE, + -- 'X', '0', '1', '-', 'B', 'Z', + TRUE, TRUE, TRUE, TRUE, TRUE, FALSE, + -- 'S' + TRUE ); + + CONSTANT ValidStateTableState : ValidStateTableInputType := + -- '/', '\', 'P', 'N', 'r', 'f', + ( FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, + -- 'p', 'n', 'R', 'F', '^', 'v', + FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, + -- 'E', 'A', 'D', '*', + FALSE, FALSE, FALSE, FALSE, + -- 'X', '0', '1', '-', 'B', 'Z', + TRUE, TRUE, TRUE, TRUE, TRUE, FALSE, + -- 'S' + FALSE ); + + TYPE StateTableMatchType IS ARRAY (X01,X01,VitalStateSymbolType) OF BOOLEAN; + -- last value, present value, table symbol + CONSTANT StateTableMatch : StateTableMatchType := ( + ( -- X (lastvalue) + -- / \ P N r f + -- p n R F ^ v + -- E A D * + -- X 0 1 - B Z S + (FALSE,FALSE,FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,FALSE, + TRUE, FALSE,FALSE,TRUE, FALSE,FALSE,FALSE), + (FALSE,FALSE,FALSE,TRUE, FALSE,FALSE, + FALSE,FALSE,FALSE,TRUE, FALSE,TRUE, + TRUE, FALSE,TRUE, TRUE, + FALSE,TRUE, FALSE,TRUE, TRUE, FALSE,FALSE), + (FALSE,FALSE,TRUE, FALSE,FALSE,FALSE, + FALSE,FALSE,TRUE, FALSE,TRUE, FALSE, + TRUE, TRUE, FALSE,TRUE, + FALSE,FALSE,TRUE, TRUE, TRUE, FALSE,FALSE) + ), + + (-- 0 (lastvalue) + -- / \ P N r f + -- p n R F ^ v + -- E A D * + -- X 0 1 - B Z S + (FALSE,FALSE,FALSE,FALSE,TRUE, FALSE, + TRUE, FALSE,TRUE, FALSE,FALSE,FALSE, + FALSE,TRUE, FALSE,TRUE, + TRUE, FALSE,FALSE,TRUE, FALSE,FALSE,FALSE), + (FALSE,FALSE,FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,FALSE, + FALSE,TRUE, FALSE,TRUE, TRUE, FALSE,TRUE ), + (TRUE, FALSE,TRUE, FALSE,FALSE,FALSE, + TRUE, FALSE,TRUE, FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,TRUE, + FALSE,FALSE,TRUE, TRUE, TRUE, FALSE,FALSE) + ), + + (-- 1 (lastvalue) + -- / \ P N r f + -- p n R F ^ v + -- E A D * + -- X 0 1 - B Z S + (FALSE,FALSE,FALSE,FALSE,FALSE,TRUE , + FALSE,TRUE, FALSE,TRUE, FALSE,FALSE, + FALSE,FALSE,TRUE, TRUE, + TRUE, FALSE,FALSE,TRUE, FALSE,FALSE,FALSE), + (FALSE,TRUE, FALSE,TRUE, FALSE,FALSE, + FALSE,TRUE, FALSE,TRUE, FALSE,FALSE, + FALSE,FALSE,FALSE,TRUE, + FALSE,TRUE, FALSE,TRUE, TRUE, FALSE,FALSE), + (FALSE,FALSE,FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,FALSE,FALSE, + FALSE,FALSE,TRUE, TRUE, TRUE, FALSE,TRUE ) + ) + ); + + TYPE Logic_UX01Z_Table IS ARRAY (std_ulogic) OF UX01Z; + ---------------------------------------------------------- + -- table name : cvt_to_x01z + -- parameters : std_ulogic -- some logic value + -- returns : UX01Z -- state value of logic value + -- purpose : to convert state-strength to state only + ---------------------------------------------------------- + CONSTANT cvt_to_ux01z : Logic_UX01Z_Table := + ('U','X','0','1','Z','X','0','1','X' ); + + TYPE LogicCvtTableType IS ARRAY (std_ulogic) OF CHARACTER; + CONSTANT LogicCvtTable : LogicCvtTableType + := ( 'U', 'X', '0', '1', 'Z', 'W', 'L', 'H', '-'); + + -------------------------------------------------------------------- + -- LOCAL Utilities + -------------------------------------------------------------------- + -- ------------------------------------------------------------------------ + -- FUNCTION NAME : MINIMUM + -- + -- PARAMETERS : in1, in2 - integer, time + -- + -- DESCRIPTION : return smaller of in1 and in2 + -- ------------------------------------------------------------------------ + FUNCTION Minimum ( + CONSTANT in1, in2 : INTEGER + ) RETURN INTEGER IS + BEGIN + IF (in1 < in2) THEN + RETURN in1; + END IF; + RETURN in2; + END; + -- ------------------------------------------------------------------------ + FUNCTION Minimum ( + CONSTANT t1,t2 : IN TIME + ) RETURN TIME IS + BEGIN + IF ( t1 < t2 ) THEN RETURN (t1); ELSE RETURN (t2); END IF; + END Minimum; + + -- ------------------------------------------------------------------------ + -- FUNCTION NAME : MAXIMUM + -- + -- PARAMETERS : in1, in2 - integer, time + -- + -- DESCRIPTION : return larger of in1 and in2 + -- ------------------------------------------------------------------------ + FUNCTION Maximum ( + CONSTANT in1, in2 : INTEGER + ) RETURN INTEGER IS + BEGIN + IF (in1 > in2) THEN + RETURN in1; + END IF; + RETURN in2; + END; + ----------------------------------------------------------------------- + FUNCTION Maximum ( + CONSTANT t1,t2 : IN TIME + ) RETURN TIME IS + BEGIN + IF ( t1 > t2 ) THEN RETURN (t1); ELSE RETURN (t2); END IF; + END Maximum; + + ----------------------------------------------------------------------- + FUNCTION GlitchMinTime ( + CONSTANT Time1, Time2 : IN TIME + ) RETURN TIME IS + BEGIN + IF ( Time1 >= NOW ) THEN + IF ( Time2 >= NOW ) THEN + RETURN Minimum ( Time1, Time2); + ELSE + RETURN Time1; + END IF; + ELSE + IF ( Time2 >= NOW ) THEN + RETURN Time2; + ELSE + RETURN 0 ns; + END IF; + END IF; + END; + + -------------------------------------------------------------------- + -- Error Message Types and Tables + -------------------------------------------------------------------- + TYPE VitalErrorType IS ( + ErrNegDel, + ErrInpSym, + ErrOutSym, + ErrStaSym, + ErrVctLng, + ErrTabWidSml, + ErrTabWidLrg, + ErrTabResSml, + ErrTabResLrg + ); + + TYPE VitalErrorSeverityType IS ARRAY (VitalErrorType) OF SEVERITY_LEVEL; + CONSTANT VitalErrorSeverity : VitalErrorSeverityType := ( + ErrNegDel => WARNING, + ErrInpSym => ERROR, + ErrOutSym => ERROR, + ErrStaSym => ERROR, + ErrVctLng => ERROR, + ErrTabWidSml => ERROR, + ErrTabWidLrg => WARNING, + ErrTabResSml => WARNING, + ErrTabResLrg => WARNING + ); + + CONSTANT MsgNegDel : STRING := + "Negative delay. New output value not scheduled. Output signal is: "; + CONSTANT MsgInpSym : STRING := + "Illegal symbol in the input portion of a Truth/State table."; + CONSTANT MsgOutSym : STRING := + "Illegal symbol in the output portion of a Truth/State table."; + CONSTANT MsgStaSym : STRING := + "Illegal symbol in the state portion of a State table."; + CONSTANT MsgVctLng : STRING := + "Vector (array) lengths not equal. "; + CONSTANT MsgTabWidSml : STRING := + "Width of the Truth/State table is too small."; + CONSTANT MsgTabWidLrg : STRING := + "Width of Truth/State table is too large. Extra elements are ignored."; + CONSTANT MsgTabResSml : STRING := + "Result of Truth/State table has too many elements."; + CONSTANT MsgTabResLrg : STRING := + "Result of Truth/State table has too few elements."; + + CONSTANT MsgUnknown : STRING := + "Unknown error message."; + + -------------------------------------------------------------------- + -- LOCAL Utilities + -------------------------------------------------------------------- + FUNCTION VitalMessage ( + CONSTANT ErrorId : IN VitalErrorType + ) RETURN STRING IS + BEGIN + CASE ErrorId IS + WHEN ErrNegDel => RETURN MsgNegDel; + WHEN ErrInpSym => RETURN MsgInpSym; + WHEN ErrOutSym => RETURN MsgOutSym; + WHEN ErrStaSym => RETURN MsgStaSym; + WHEN ErrVctLng => RETURN MsgVctLng; + WHEN ErrTabWidSml => RETURN MsgTabWidSml; + WHEN ErrTabWidLrg => RETURN MsgTabWidLrg; + WHEN ErrTabResSml => RETURN MsgTabResSml; + WHEN ErrTabResLrg => RETURN MsgTabResLrg; + WHEN OTHERS => RETURN MsgUnknown; + END CASE; + END; + + PROCEDURE VitalError ( + CONSTANT Routine : IN STRING; + CONSTANT ErrorId : IN VitalErrorType + ) IS + BEGIN + ASSERT FALSE + REPORT Routine & ": " & VitalMessage(ErrorId) + SEVERITY VitalErrorSeverity(ErrorId); + END; + + PROCEDURE VitalError ( + CONSTANT Routine : IN STRING; + CONSTANT ErrorId : IN VitalErrorType; + CONSTANT Info : IN STRING + ) IS + BEGIN + ASSERT FALSE + REPORT Routine & ": " & VitalMessage(ErrorId) & Info + SEVERITY VitalErrorSeverity(ErrorId); + END; + + PROCEDURE VitalError ( + CONSTANT Routine : IN STRING; + CONSTANT ErrorId : IN VitalErrorType; + CONSTANT Info : IN CHARACTER + ) IS + BEGIN + ASSERT FALSE + REPORT Routine & ": " & VitalMessage(ErrorId) & Info + SEVERITY VitalErrorSeverity(ErrorId); + END; + + --------------------------------------------------------------------------- + PROCEDURE ReportGlitch ( + CONSTANT GlitchRoutine : IN STRING; + CONSTANT OutSignalName : IN STRING; + CONSTANT PreemptedTime : IN TIME; + CONSTANT PreemptedValue : IN std_ulogic; + CONSTANT NewTime : IN TIME; + CONSTANT NewValue : IN std_ulogic; + CONSTANT Index : IN INTEGER := 0; + CONSTANT IsArraySignal : IN BOOLEAN := FALSE; + CONSTANT MsgSeverity : IN SEVERITY_LEVEL := WARNING + ) IS + + VARIABLE StrPtr1, StrPtr2, StrPtr3, StrPtr4, StrPtr5 : LINE; + BEGIN + + Write (StrPtr1, PreemptedTime ); + Write (StrPtr2, NewTime); + Write (StrPtr3, LogicCvtTable(PreemptedValue)); + Write (StrPtr4, LogicCvtTable(NewValue)); + IF IsArraySignal THEN + Write (StrPtr5, STRING'( "(" ) ); + Write (StrPtr5, Index); + Write (StrPtr5, STRING'( ")" ) ); + ELSE + Write (StrPtr5, STRING'( " " ) ); + END IF; + + -- Issue Report only if Preemted value has not been + -- removed from event queue + ASSERT PreemptedTime > NewTime + REPORT GlitchRoutine & ": GLITCH Detected on port " & + OutSignalName & StrPtr5.ALL & + "; Preempted Future Value := " & StrPtr3.ALL & + " @ " & StrPtr1.ALL & + "; Newly Scheduled Value := " & StrPtr4.ALL & + " @ " & StrPtr2.ALL & + ";" + SEVERITY MsgSeverity; + + DEALLOCATE(StrPtr1); + DEALLOCATE(StrPtr2); + DEALLOCATE(StrPtr3); + DEALLOCATE(StrPtr4); + DEALLOCATE(StrPtr5); + RETURN; + END ReportGlitch; + + --------------------------------------------------------------------------- + -- Procedure : VitalGlitchOnEvent + -- : + -- Parameters : OutSignal ........ signal being driven + -- : OutSignalName..... name of the driven signal + -- : GlitchData........ internal data required by the procedure + -- : NewValue.......... new value being assigned + -- : NewDelay.......... Delay accompanying the assignment + -- : (Note: for vectors, this is an array) + -- : GlitchMode........ Glitch generation mode + -- : MessagePlusX, MessageOnly, + -- : XOnly, NoGlitch ) + -- : GlitchDelay....... if <= 0 ns , then there will be no Glitch + -- : if > NewDelay, then there is no Glitch, + -- : otherwise, this is the time when a FORCED + -- : generation of a glitch will occur. + ---------------------------------------------------------------------------- + PROCEDURE VitalGlitchOnEvent ( + SIGNAL OutSignal : OUT std_logic; + CONSTANT OutSignalName : IN STRING; + VARIABLE GlitchData : INOUT GlitchDataType; + CONSTANT NewValue : IN std_logic; + CONSTANT NewDelay : IN TIME := 0 ns; + CONSTANT GlitchMode : IN VitalGlitchModeType := MessagePlusX; + CONSTANT GlitchDelay : IN TIME := -1 ns; -- IR#223 + CONSTANT MsgSeverity : IN SEVERITY_LEVEL := WARNING + ) IS + -- ------------------------------------------------------------------------ + VARIABLE NoGlitchDet : BOOLEAN := FALSE; + VARIABLE OldGlitch : BOOLEAN := FALSE; + VARIABLE Dly : TIME := NewDelay; + + BEGIN + -- If nothing to schedule, just return + IF NewDelay < 0 ns THEN + IF (NewValue /= GlitchData.SchedValue) THEN + VitalError ( "VitalGlitchOnEvent", ErrNegDel, OutSignalName ); + END IF; + + ELSE + -- If nothing currently scheduled + IF GlitchData.SchedTime <= NOW THEN + GlitchData.CurrentValue := GlitchData.SchedValue; + IF (GlitchDelay <= 0 ns) THEN + IF (NewValue = GlitchData.SchedValue) THEN RETURN; END IF; + NoGlitchDet := TRUE; + END IF; + + -- Transaction currently scheduled - if glitch already happened + ELSIF GlitchData.GlitchTime <= NOW THEN + GlitchData.CurrentValue := 'X'; + OldGlitch := TRUE; + IF (GlitchData.SchedValue = NewValue) THEN + dly := Minimum( GlitchData.SchedTime-NOW, NewDelay ); + END IF; + + -- Transaction currently scheduled (no glitch if same value) + ELSIF (GlitchData.SchedValue = NewValue) AND + (GlitchData.SchedTime = GlitchData.GlitchTime) AND + (GlitchDelay <= 0 ns) THEN + NoGlitchDet := TRUE; + Dly := Minimum( GlitchData.SchedTime-NOW, NewDelay ); + + END IF; + + GlitchData.SchedTime := NOW+Dly; + IF OldGlitch THEN + OutSignal <= NewValue AFTER Dly; + + ELSIF NoGlitchDet THEN + GlitchData.GlitchTime := NOW+Dly; + OutSignal <= NewValue AFTER Dly; + + ELSE -- new glitch + GlitchData.GlitchTime := GlitchMinTime ( GlitchData.GlitchTime, + NOW+GlitchDelay ); + + IF (GlitchMode = MessagePlusX) OR + (GlitchMode = MessageOnly) THEN + ReportGlitch ( "VitalGlitchOnEvent", OutSignalName, + GlitchData.GlitchTime, GlitchData.SchedValue, + (Dly + NOW), NewValue, + MsgSeverity=>MsgSeverity ); + END IF; + + IF (GlitchMode = MessagePlusX) OR (GlitchMode = XOnly) THEN + OutSignal <= 'X' AFTER GlitchData.GlitchTime-NOW; + OutSignal <= TRANSPORT NewValue AFTER Dly; + ELSE + OutSignal <= NewValue AFTER Dly; + END IF; + END IF; + + GlitchData.SchedValue := NewValue; + END IF; + + RETURN; + END; + + ---------------------------------------------------------------------------- + PROCEDURE VitalGlitchOnEvent ( + SIGNAL OutSignal : OUT std_logic_vector; + CONSTANT OutSignalName : IN STRING; + VARIABLE GlitchData : INOUT GlitchDataArrayType; + CONSTANT NewValue : IN std_logic_vector; + CONSTANT NewDelay : IN VitalTimeArray; + CONSTANT GlitchMode : IN VitalGlitchModeType := MessagePlusX; + CONSTANT GlitchDelay : IN VitalTimeArray; + CONSTANT MsgSeverity : IN SEVERITY_LEVEL := WARNING + ) IS + + ALIAS GlDataAlias : GlitchDataArrayType(1 TO GlitchData'LENGTH) + IS GlitchData; + ALIAS NewValAlias : std_logic_vector(1 TO NewValue'LENGTH) IS NewValue; + ALIAS GlDelayAlias : VitalTimeArray(1 TO GlitchDelay'LENGTH) + IS GlitchDelay; + ALIAS NewDelAlias : VitalTimeArray(1 TO NewDelay'LENGTH) IS NewDelay; + + VARIABLE Index : INTEGER := OutSignal'LEFT; + VARIABLE Direction : INTEGER; + VARIABLE NoGlitchDet : BOOLEAN; + VARIABLE OldGlitch : BOOLEAN; + VARIABLE Dly, GlDly : TIME; + + BEGIN + IF (OutSignal'LEFT > OutSignal'RIGHT) THEN + Direction := -1; + ELSE + Direction := 1; + END IF; + + IF ( (OutSignal'LENGTH /= GlitchData'LENGTH) OR + (OutSignal'LENGTH /= NewValue'LENGTH) OR + (OutSignal'LENGTH /= NewDelay'LENGTH) OR + (OutSignal'LENGTH /= GlitchDelay'LENGTH) ) THEN + VitalError ( "VitalGlitchOnEvent", ErrVctLng, OutSignalName ); + RETURN; + END IF; + + -- a call to the scalar function cannot be made since the actual + -- name associated with a signal parameter must be locally static + FOR n IN 1 TO OutSignal'LENGTH LOOP + + NoGlitchDet := FALSE; + OldGlitch := FALSE; + Dly := NewDelAlias(n); + + -- If nothing to schedule, just skip to next loop iteration + IF NewDelAlias(n) < 0 ns THEN + IF (NewValAlias(n) /= GlDataAlias(n).SchedValue) THEN + VitalError ( "VitalGlitchOnEvent", ErrNegDel, OutSignalName ); + END IF; + ELSE + -- If nothing currently scheduled (i.e. last scheduled + -- transaction already occurred) + IF GlDataAlias(n).SchedTime <= NOW THEN + GlDataAlias(n).CurrentValue := GlDataAlias(n).SchedValue; + IF (GlDelayAlias(n) <= 0 ns) THEN + -- Next iteration if no change in value + IF (NewValAlias(n) = GlDataAlias(n).SchedValue) THEN + Index := Index + Direction; + NEXT; + END IF; + -- since last transaction already occurred there is no glitch + NoGlitchDet := TRUE; + END IF; + + -- Transaction currently scheduled - if glitch already happened + ELSIF GlDataAlias(n).GlitchTime <= NOW THEN + GlDataAlias(n).CurrentValue := 'X'; + OldGlitch := TRUE; + IF (GlDataAlias(n).SchedValue = NewValAlias(n)) THEN + dly := Minimum( GlDataAlias(n).SchedTime-NOW, + NewDelAlias(n) ); + END IF; + + -- Transaction currently scheduled + ELSIF (GlDataAlias(n).SchedValue = NewValAlias(n)) AND + (GlDataAlias(n).SchedTime = GlDataAlias(n).GlitchTime) AND + (GlDelayAlias(n) <= 0 ns) THEN + NoGlitchDet := TRUE; + Dly := Minimum( GlDataAlias(n).SchedTime-NOW, + NewDelAlias(n) ); + END IF; + + -- update last scheduled transaction + GlDataAlias(n).SchedTime := NOW+Dly; + + IF OldGlitch THEN + OutSignal(Index) <= NewValAlias(n) AFTER Dly; + ELSIF NoGlitchDet THEN + -- if no glitch then update last glitch time + -- and OutSignal(actual_index) + GlDataAlias(n).GlitchTime := NOW+Dly; + OutSignal(Index) <= NewValAlias(n) AFTER Dly; + ELSE -- new glitch + GlDataAlias(n).GlitchTime := GlitchMinTime ( + GlDataAlias(n).GlitchTime, + NOW+GlDelayAlias(n) ); + + IF (GlitchMode = MessagePlusX) OR + (GlitchMode = MessageOnly) THEN + ReportGlitch ( "VitalGlitchOnEvent", OutSignalName, + GlDataAlias(n).GlitchTime, + GlDataAlias(n).SchedValue, + (Dly + NOW), NewValAlias(n), + Index, TRUE, MsgSeverity ); + END IF; + + IF (GlitchMode = MessagePlusX) OR (GlitchMode = XOnly) THEN + GlDly := GlDataAlias(n).GlitchTime - NOW; + OutSignal(Index) <= 'X' AFTER GlDly; + OutSignal(Index) <= TRANSPORT NewValAlias(n) AFTER Dly; + ELSE + OutSignal(Index) <= NewValAlias(n) AFTER Dly; + END IF; + + END IF; -- glitch / no-glitch + GlDataAlias(n).SchedValue := NewValAlias(n); + + END IF; -- NewDelAlias(n) < 0 ns + Index := Index + Direction; + END LOOP; + + RETURN; + END; + + --------------------------------------------------------------------------- + -- ------------------------------------------------------------------------ + -- PROCEDURE NAME : TruthOutputX01Z + -- + -- PARAMETERS : table_out - output of table + -- X01Zout - output converted to X01Z + -- err - true if illegal character is encountered + -- + -- + -- DESCRIPTION : converts the output of a truth table to a valid + -- std_ulogic + -- ------------------------------------------------------------------------ + PROCEDURE TruthOutputX01Z ( + CONSTANT TableOut : IN VitalTruthSymbolType; + VARIABLE X01Zout : OUT std_ulogic; + VARIABLE Err : OUT BOOLEAN + ) IS + VARIABLE TempOut : std_ulogic; + BEGIN + Err := FALSE; + TempOut := TruthTableOutMap(TableOut); + IF (TempOut = '-') THEN + Err := TRUE; + TempOut := 'X'; + VitalError ( "VitalTruthTable", ErrOutSym, To_TruthChar(TableOut)); + END IF; + X01Zout := TempOut; + END; + + -- ------------------------------------------------------------------------ + -- PROCEDURE NAME : StateOutputX01Z + -- + -- PARAMETERS : table_out - output of table + -- prev_out - previous output value + -- X01Zout - output cojnverted to X01Z + -- err - true if illegal character is encountered + -- + -- DESCRIPTION : converts the output of a state table to a + -- valid std_ulogic + -- ------------------------------------------------------------------------ + PROCEDURE StateOutputX01Z ( + CONSTANT TableOut : IN VitalStateSymbolType; + CONSTANT PrevOut : IN std_ulogic; + VARIABLE X01Zout : OUT std_ulogic; + VARIABLE Err : OUT BOOLEAN + ) IS + VARIABLE TempOut : std_ulogic; + BEGIN + Err := FALSE; + TempOut := StateTableOutMap(TableOut); + IF (TempOut = '-') THEN + Err := TRUE; + TempOut := 'X'; + VitalError ( "VitalStateTable", ErrOutSym, To_StateChar(TableOut)); + ELSIF (TempOut = 'W') THEN + TempOut := To_X01Z(PrevOut); + END IF; + X01Zout := TempOut; + END; + + -- ------------------------------------------------------------------------ + -- PROCEDURE NAME: StateMatch + -- + -- PARAMETERS : symbol - symbol from state table + -- in2 - input from VitalStateTble procedure + -- to state table + -- in2LastValue - previous value of input + -- state - false if the symbol is from the input + -- portion of the table, + -- true if the symbol is from the state + -- portion of the table + -- Err - true if symbol is not a valid input symbol + -- ReturnValue - true if match occurred + -- + -- DESCRIPTION : This procedure sets ReturnValue to true if in2 matches + -- symbol (from the state table). If symbol is an edge + -- value edge is set to true and in2 and in2LastValue are + -- checked against symbol. Err is set to true if symbol + -- is an invalid value for the input portion of the state + -- table. + -- + -- ------------------------------------------------------------------------ + PROCEDURE StateMatch ( + CONSTANT Symbol : IN VitalStateSymbolType; + CONSTANT in2 : IN std_ulogic; + CONSTANT in2LastValue : IN std_ulogic; + CONSTANT State : IN BOOLEAN; + VARIABLE Err : OUT BOOLEAN; + VARIABLE ReturnValue : OUT BOOLEAN + ) IS + BEGIN + IF (State) THEN + IF (NOT ValidStateTableState(Symbol)) THEN + VitalError ( "VitalStateTable", ErrStaSym, To_StateChar(Symbol)); + Err := TRUE; + ReturnValue := FALSE; + ELSE + Err := FALSE; + ReturnValue := StateTableMatch(in2LastValue, in2, Symbol); + END IF; + ELSE + IF (NOT ValidStateTableInput(Symbol) ) THEN + VitalError ( "VitalStateTable", ErrInpSym, To_StateChar(Symbol)); + Err := TRUE; + ReturnValue := FALSE; + ELSE + ReturnValue := StateTableMatch(in2LastValue, in2, Symbol); + Err := FALSE; + END IF; + END IF; + END; + + -- ----------------------------------------------------------------------- + -- FUNCTION NAME: StateTableLookUp + -- + -- PARAMETERS : StateTable - state table + -- PresentDataIn - current inputs + -- PreviousDataIn - previous inputs and states + -- NumStates - number of state variables + -- PresentOutputs - current state and current outputs + -- + -- DESCRIPTION : This function is used to find the output of the + -- StateTable corresponding to a given set of inputs. + -- + -- ------------------------------------------------------------------------ + FUNCTION StateTableLookUp ( + CONSTANT StateTable : VitalStateTableType; + CONSTANT PresentDataIn : std_logic_vector; + CONSTANT PreviousDataIn : std_logic_vector; + CONSTANT NumStates : NATURAL; + CONSTANT PresentOutputs : std_logic_vector + ) RETURN std_logic_vector IS + + CONSTANT InputSize : INTEGER := PresentDataIn'LENGTH; + CONSTANT NumInputs : INTEGER := InputSize + NumStates - 1; + CONSTANT TableEntries : INTEGER := StateTable'LENGTH(1); + CONSTANT TableWidth : INTEGER := StateTable'LENGTH(2); + CONSTANT OutSize : INTEGER := TableWidth - InputSize - NumStates; + VARIABLE Inputs : std_logic_vector(0 TO NumInputs); + VARIABLE PrevInputs : std_logic_vector(0 TO NumInputs) + := (OTHERS => 'X'); + VARIABLE ReturnValue : std_logic_vector(0 TO (OutSize-1)) + := (OTHERS => 'X'); + VARIABLE Temp : std_ulogic; + VARIABLE Match : BOOLEAN; + VARIABLE Err : BOOLEAN := FALSE; + + -- This needs to be done since the TableLookup arrays must be + -- ascending starting with 0 + VARIABLE TableAlias : VitalStateTableType(0 TO TableEntries - 1, + 0 TO TableWidth - 1) + := StateTable; + + BEGIN + Inputs(0 TO InputSize-1) := PresentDataIn; + Inputs(InputSize TO NumInputs) := PresentOutputs(0 TO NumStates - 1); + PrevInputs(0 TO InputSize - 1) := PreviousDataIn(0 TO InputSize - 1); + + ColLoop: -- Compare each entry in the table + FOR i IN TableAlias'RANGE(1) LOOP + + RowLoop: -- Check each element of the entry + FOR j IN 0 TO InputSize + NumStates LOOP + + IF (j = InputSize + NumStates) THEN -- a match occurred + FOR k IN 0 TO Minimum(OutSize, PresentOutputs'LENGTH)-1 LOOP + StateOutputX01Z ( + TableAlias(i, TableWidth - k - 1), + PresentOutputs(PresentOutputs'LENGTH - k - 1), + Temp, Err); + ReturnValue(OutSize - k - 1) := Temp; + IF (Err) THEN + ReturnValue := (OTHERS => 'X'); + RETURN ReturnValue; + END IF; + END LOOP; + RETURN ReturnValue; + END IF; + + StateMatch ( TableAlias(i,j), + Inputs(j), PrevInputs(j), + j >= InputSize, Err, Match); + EXIT RowLoop WHEN NOT(Match); + EXIT ColLoop WHEN Err; + END LOOP RowLoop; + END LOOP ColLoop; + + ReturnValue := (OTHERS => 'X'); + RETURN ReturnValue; + END; + + -------------------------------------------------------------------- + -- to_ux01z + ------------------------------------------------------------------- + FUNCTION To_UX01Z ( s : std_ulogic + ) RETURN UX01Z IS + BEGIN + RETURN cvt_to_ux01z (s); + END; + + --------------------------------------------------------------------------- + -- Function : GetEdge + -- Purpose : Converts transitions on a given input signal into a + -- enumeration value representing the transition or level + -- of the signal. + -- + -- previous "value" current "value" := "edge" + -- --------------------------------------------------------- + -- '1' | 'H' '1' | 'H' '1' level, no edge + -- '0' | 'L' '1' | 'H' '/' rising edge + -- others '1' | 'H' 'R' rising from X + -- + -- '1' | 'H' '0' | 'L' '\' falling egde + -- '0' | 'L' '0' | 'L' '0' level, no edge + -- others '0' | 'L' 'F' falling from X + -- + -- 'X' | 'W' | '-' 'X' | 'W' | '-' 'X' unknown (X) level + -- 'Z' 'Z' 'X' unknown (X) level + -- 'U' 'U' 'U' 'U' level + -- + -- '1' | 'H' others 'f' falling to X + -- '0' | 'L' others 'r' rising to X + -- 'X' | 'W' | '-' 'U' | 'Z' 'x' unknown (X) edge + -- 'Z' 'X' | 'W' | '-' | 'U' 'x' unknown (X) edge + -- 'U' 'X' | 'W' | '-' | 'Z' 'x' unknown (X) edge + -- + --------------------------------------------------------------------------- + FUNCTION GetEdge ( + SIGNAL s : IN std_logic + ) RETURN EdgeType IS + BEGIN + IF (s'EVENT) + THEN RETURN LogicToEdge ( s'LAST_VALUE, s ); + ELSE RETURN LogicToLevel ( s ); + END IF; + END; + + --------------------------------------------------------------------------- + PROCEDURE GetEdge ( + SIGNAL s : IN std_logic_vector; + VARIABLE LastS : INOUT std_logic_vector; + VARIABLE Edge : OUT EdgeArray ) IS + + ALIAS sAlias : std_logic_vector ( 1 TO s'LENGTH ) IS s; + ALIAS LastSAlias : std_logic_vector ( 1 TO LastS'LENGTH ) IS LastS; + ALIAS EdgeAlias : EdgeArray ( 1 TO Edge'LENGTH ) IS Edge; + BEGIN + IF s'LENGTH /= LastS'LENGTH OR + s'LENGTH /= Edge'LENGTH THEN + VitalError ( "GetEdge", ErrVctLng, "s, LastS, Edge" ); + END IF; + + FOR n IN 1 TO s'LENGTH LOOP + EdgeAlias(n) := LogicToEdge( LastSAlias(n), sAlias(n) ); + LastSAlias(n) := sAlias(n); + END LOOP; + END; + + --------------------------------------------------------------------------- + FUNCTION ToEdge ( Value : IN std_logic + ) RETURN EdgeType IS + BEGIN + RETURN LogicToLevel( Value ); + END; + + -- Note: This function will likely be replaced by S'DRIVING_VALUE in VHDL'92 + ---------------------------------------------------------------------------- + IMPURE FUNCTION CurValue ( + CONSTANT GlitchData : IN GlitchDataType + ) RETURN std_logic IS + BEGIN + IF NOW >= GlitchData.SchedTime THEN + RETURN GlitchData.SchedValue; + ELSIF NOW >= GlitchData.GlitchTime THEN + RETURN 'X'; + ELSE + RETURN GlitchData.CurrentValue; + END IF; + END; + --------------------------------------------------------------------------- + IMPURE FUNCTION CurValue ( + CONSTANT GlitchData : IN GlitchDataArrayType + ) RETURN std_logic_vector IS + VARIABLE Result : std_logic_vector(GlitchData'RANGE); + BEGIN + FOR n IN GlitchData'RANGE LOOP + IF NOW >= GlitchData(n).SchedTime THEN + Result(n) := GlitchData(n).SchedValue; + ELSIF NOW >= GlitchData(n).GlitchTime THEN + Result(n) := 'X'; + ELSE + Result(n) := GlitchData(n).CurrentValue; + END IF; + END LOOP; + RETURN Result; + END; + + --------------------------------------------------------------------------- + -- function calculation utilities + --------------------------------------------------------------------------- + + --------------------------------------------------------------------------- + -- Function : VitalSame + -- Returns : VitalSame compares the state (UX01) of two logic value. A + -- value of 'X' is returned if the values are different. The + -- common value is returned if the values are equal. + -- Purpose : When the result of a logic model may be either of two + -- separate input values (eg. when the select on a MUX is 'X'), + -- VitalSame may be used to determine if the result needs to + -- be 'X'. + -- Arguments : See the declarations below... + --------------------------------------------------------------------------- + FUNCTION VitalSame ( + CONSTANT a, b : IN std_ulogic + ) RETURN std_ulogic IS + BEGIN + IF To_UX01(a) = To_UX01(b) + THEN RETURN To_UX01(a); + ELSE RETURN 'X'; + END IF; + END; + + --------------------------------------------------------------------------- + -- delay selection utilities + --------------------------------------------------------------------------- + + --------------------------------------------------------------------------- + -- Procedure : BufPath, InvPath + -- + -- Purpose : BufPath and InvPath compute output change times, based on + -- a change on an input port. The computed output change times + -- returned in the composite parameter 'schd'. + -- + -- BufPath and InpPath are used together with the delay path + -- selection functions (GetSchedDelay, VitalAND, VitalOR... ) + -- The 'schd' value from each of the input ports of a model are + -- combined by the delay selection functions (VitalAND, + -- VitalOR, ...). The GetSchedDelay procedure converts the + -- combined output changes times to the single delay (delta + -- time) value for scheduling the output change (passed to + -- VitalGlitchOnEvent). + -- + -- The values in 'schd' are: (absolute times) + -- inp0 : time of output change due to input change to 0 + -- inp1 : time of output change due to input change to 1 + -- inpX : time of output change due to input change to X + -- glch0 : time of output glitch due to input change to 0 + -- glch1 : time of output glitch due to input change to 1 + -- + -- The output times are computed from the model INPUT value + -- and not the final value. For this reason, 'BufPath' should + -- be used to compute the output times for a non-inverting + -- delay paths and 'InvPath' should be used to compute the + -- ouput times for inverting delay paths. Delay paths which + -- include both non-inverting and paths require usage of both + -- 'BufPath' and 'InvPath'. (IE this is needed for the + -- select->output path of a MUX -- See the VitalMUX model). + -- + -- + -- Parameters : schd....... Computed output result times. (INOUT parameter + -- modified only on input edges) + -- Iedg....... Input port edge/level value. + -- tpd....... Propagation delays from this input + -- + --------------------------------------------------------------------------- + + PROCEDURE BufPath ( + VARIABLE Schd : INOUT SchedType; + CONSTANT Iedg : IN EdgeType; + CONSTANT tpd : IN VitalDelayType01 + ) IS + BEGIN + CASE Iedg IS + WHEN '0'|'1' => NULL; -- no edge: no timing update + WHEN '/'|'R' => Schd.inp0 := TIME'HIGH; + Schd.inp1 := NOW + tpd(tr01); Schd.Glch1 := Schd.inp1; + Schd.InpX := Schd.inp1; + WHEN '\'|'F' => Schd.inp1 := TIME'HIGH; + Schd.inp0 := NOW + tpd(tr10); Schd.Glch0 := Schd.inp0; + Schd.InpX := Schd.inp0; + WHEN 'r' => Schd.inp1 := TIME'HIGH; + Schd.inp0 := TIME'HIGH; + Schd.InpX := NOW + tpd(tr01); + WHEN 'f' => Schd.inp0 := TIME'HIGH; + Schd.inp1 := TIME'HIGH; + Schd.InpX := NOW + tpd(tr10); + WHEN 'x' => Schd.inp1 := TIME'HIGH; + Schd.inp0 := TIME'HIGH; + -- update for X->X change + Schd.InpX := NOW + Minimum(tpd(tr10),tpd(tr01)); + WHEN OTHERS => NULL; -- no timing change + END CASE; + END; + + PROCEDURE BufPath ( + VARIABLE Schd : INOUT SchedArray; + CONSTANT Iedg : IN EdgeArray; + CONSTANT tpd : IN VitalDelayArrayType01 + ) IS + BEGIN + FOR n IN Schd'RANGE LOOP + CASE Iedg(n) IS + WHEN '0'|'1' => NULL; -- no edge: no timing update + WHEN '/'|'R' => Schd(n).inp0 := TIME'HIGH; + Schd(n).inp1 := NOW + tpd(n)(tr01); + Schd(n).Glch1 := Schd(n).inp1; + Schd(n).InpX := Schd(n).inp1; + WHEN '\'|'F' => Schd(n).inp1 := TIME'HIGH; + Schd(n).inp0 := NOW + tpd(n)(tr10); + Schd(n).Glch0 := Schd(n).inp0; + Schd(n).InpX := Schd(n).inp0; + WHEN 'r' => Schd(n).inp1 := TIME'HIGH; + Schd(n).inp0 := TIME'HIGH; + Schd(n).InpX := NOW + tpd(n)(tr01); + WHEN 'f' => Schd(n).inp0 := TIME'HIGH; + Schd(n).inp1 := TIME'HIGH; + Schd(n).InpX := NOW + tpd(n)(tr10); + WHEN 'x' => Schd(n).inp1 := TIME'HIGH; + Schd(n).inp0 := TIME'HIGH; + -- update for X->X change + Schd(n).InpX := NOW + Minimum ( tpd(n)(tr10), + tpd(n)(tr01) ); + WHEN OTHERS => NULL; -- no timing change + END CASE; + END LOOP; + END; + + PROCEDURE InvPath ( + VARIABLE Schd : INOUT SchedType; + CONSTANT Iedg : IN EdgeType; + CONSTANT tpd : IN VitalDelayType01 + ) IS + BEGIN + CASE Iedg IS + WHEN '0'|'1' => NULL; -- no edge: no timing update + WHEN '/'|'R' => Schd.inp0 := TIME'HIGH; + Schd.inp1 := NOW + tpd(tr10); Schd.Glch1 := Schd.inp1; + Schd.InpX := Schd.inp1; + WHEN '\'|'F' => Schd.inp1 := TIME'HIGH; + Schd.inp0 := NOW + tpd(tr01); Schd.Glch0 := Schd.inp0; + Schd.InpX := Schd.inp0; + WHEN 'r' => Schd.inp1 := TIME'HIGH; + Schd.inp0 := TIME'HIGH; + Schd.InpX := NOW + tpd(tr10); + WHEN 'f' => Schd.inp0 := TIME'HIGH; + Schd.inp1 := TIME'HIGH; + Schd.InpX := NOW + tpd(tr01); + WHEN 'x' => Schd.inp1 := TIME'HIGH; + Schd.inp0 := TIME'HIGH; + -- update for X->X change + Schd.InpX := NOW + Minimum(tpd(tr10),tpd(tr01)); + WHEN OTHERS => NULL; -- no timing change + END CASE; + END; + + PROCEDURE InvPath ( + VARIABLE Schd : INOUT SchedArray; + CONSTANT Iedg : IN EdgeArray; + CONSTANT tpd : IN VitalDelayArrayType01 + ) IS + BEGIN + FOR n IN Schd'RANGE LOOP + CASE Iedg(n) IS + WHEN '0'|'1' => NULL; -- no edge: no timing update + WHEN '/'|'R' => Schd(n).inp0 := TIME'HIGH; + Schd(n).inp1 := NOW + tpd(n)(tr10); + Schd(n).Glch1 := Schd(n).inp1; + Schd(n).InpX := Schd(n).inp1; + WHEN '\'|'F' => Schd(n).inp1 := TIME'HIGH; + Schd(n).inp0 := NOW + tpd(n)(tr01); + Schd(n).Glch0 := Schd(n).inp0; + Schd(n).InpX := Schd(n).inp0; + WHEN 'r' => Schd(n).inp1 := TIME'HIGH; + Schd(n).inp0 := TIME'HIGH; + Schd(n).InpX := NOW + tpd(n)(tr10); + WHEN 'f' => Schd(n).inp0 := TIME'HIGH; + Schd(n).inp1 := TIME'HIGH; + Schd(n).InpX := NOW + tpd(n)(tr01); + WHEN 'x' => Schd(n).inp1 := TIME'HIGH; + Schd(n).inp0 := TIME'HIGH; + -- update for X->X change + Schd(n).InpX := NOW + Minimum ( tpd(n)(tr10), + tpd(n)(tr01) ); + WHEN OTHERS => NULL; -- no timing change + END CASE; + END LOOP; + END; + + --------------------------------------------------------------------------- + -- Procedure : BufEnab, InvEnab + -- + -- Purpose : BufEnab and InvEnab compute output change times, from a + -- change on an input enable port for a 3-state driver. The + -- computed output change times are returned in the composite + -- parameters 'schd1', 'schd0'. + -- + -- BufEnab and InpEnab are used together with the delay path + -- selection functions (GetSchedDelay, VitalAND, VitalOR... ) + -- The 'schd' value from each of the non-enable input ports of + -- a model (See BufPath, InvPath) are combined using the delay + -- selection functions (VitalAND, VitalOR, ...). The + -- GetSchedDelay procedure combines the output times on the + -- enable path with the output times from the data path(s) and + -- computes the single delay (delta time) value for scheduling + -- the output change (passed to VitalGlitchOnEvent) + -- + -- The values in 'schd*' are: (absolute times) + -- inp0 : time of output change due to input change to 0 + -- inp1 : time of output change due to input change to 1 + -- inpX : time of output change due to input change to X + -- glch0 : time of output glitch due to input change to 0 + -- glch1 : time of output glitch due to input change to 1 + -- + -- 'schd1' contains output times for 1->Z, Z->1 transitions. + -- 'schd0' contains output times for 0->Z, Z->0 transitions. + -- + -- 'BufEnab' is used for computing the output times for an + -- high asserted enable (output 'Z' for enable='0'). + -- 'InvEnab' is used for computing the output times for an + -- low asserted enable (output 'Z' for enable='1'). + -- + -- Note: separate 'schd1', 'schd0' parameters are generated + -- so that the combination of the delay paths from + -- multiple enable signals may be combined using the + -- same functions/operators used in combining separate + -- data paths. (See exampe 2 below) + -- + -- + -- Parameters : schd1...... Computed output result times for 1->Z, Z->1 + -- transitions. This parameter is modified only on + -- input edge values (events). + -- schd0...... Computed output result times for 0->Z, 0->1 + -- transitions. This parameter is modified only on + -- input edge values (events). + -- Iedg....... Input port edge/level value. + -- tpd....... Propagation delays for the enable -> output path. + -- + --------------------------------------------------------------------------- + PROCEDURE BufEnab ( + VARIABLE Schd1 : INOUT SchedType; + VARIABLE Schd0 : INOUT SchedType; + CONSTANT Iedg : IN EdgeType; + CONSTANT tpd : IN VitalDelayType01Z + ) IS + BEGIN + CASE Iedg IS + WHEN '0'|'1' => NULL; -- no edge: no timing update + WHEN '/'|'R' => Schd1.inp0 := TIME'HIGH; + Schd1.inp1 := NOW + tpd(trz1); + Schd1.Glch1 := Schd1.inp1; + Schd1.InpX := Schd1.inp1; + Schd0.inp0 := TIME'HIGH; + Schd0.inp1 := NOW + tpd(trz0); + Schd0.Glch1 := Schd0.inp1; + Schd0.InpX := Schd0.inp1; + WHEN '\'|'F' => Schd1.inp1 := TIME'HIGH; + Schd1.inp0 := NOW + tpd(tr1z); + Schd1.Glch0 := Schd1.inp0; + Schd1.InpX := Schd1.inp0; + Schd0.inp1 := TIME'HIGH; + Schd0.inp0 := NOW + tpd(tr0z); + Schd0.Glch0 := Schd0.inp0; + Schd0.InpX := Schd0.inp0; + WHEN 'r' => Schd1.inp1 := TIME'HIGH; + Schd1.inp0 := TIME'HIGH; + Schd1.InpX := NOW + tpd(trz1); + Schd0.inp1 := TIME'HIGH; + Schd0.inp0 := TIME'HIGH; + Schd0.InpX := NOW + tpd(trz0); + WHEN 'f' => Schd1.inp0 := TIME'HIGH; + Schd1.inp1 := TIME'HIGH; + Schd1.InpX := NOW + tpd(tr1z); + Schd0.inp0 := TIME'HIGH; + Schd0.inp1 := TIME'HIGH; + Schd0.InpX := NOW + tpd(tr0z); + WHEN 'x' => Schd1.inp0 := TIME'HIGH; + Schd1.inp1 := TIME'HIGH; + Schd1.InpX := NOW + Minimum(tpd(tr10),tpd(tr01)); + Schd0.inp0 := TIME'HIGH; + Schd0.inp1 := TIME'HIGH; + Schd0.InpX := NOW + Minimum(tpd(tr10),tpd(tr01)); + WHEN OTHERS => NULL; -- no timing change + END CASE; + END; + + PROCEDURE InvEnab ( + VARIABLE Schd1 : INOUT SchedType; + VARIABLE Schd0 : INOUT SchedType; + CONSTANT Iedg : IN EdgeType; + CONSTANT tpd : IN VitalDelayType01Z + ) IS + BEGIN + CASE Iedg IS + WHEN '0'|'1' => NULL; -- no edge: no timing update + WHEN '/'|'R' => Schd1.inp0 := TIME'HIGH; + Schd1.inp1 := NOW + tpd(tr1z); + Schd1.Glch1 := Schd1.inp1; + Schd1.InpX := Schd1.inp1; + Schd0.inp0 := TIME'HIGH; + Schd0.inp1 := NOW + tpd(tr0z); + Schd0.Glch1 := Schd0.inp1; + Schd0.InpX := Schd0.inp1; + WHEN '\'|'F' => Schd1.inp1 := TIME'HIGH; + Schd1.inp0 := NOW + tpd(trz1); + Schd1.Glch0 := Schd1.inp0; + Schd1.InpX := Schd1.inp0; + Schd0.inp1 := TIME'HIGH; + Schd0.inp0 := NOW + tpd(trz0); + Schd0.Glch0 := Schd0.inp0; + Schd0.InpX := Schd0.inp0; + WHEN 'r' => Schd1.inp1 := TIME'HIGH; + Schd1.inp0 := TIME'HIGH; + Schd1.InpX := NOW + tpd(tr1z); + Schd0.inp1 := TIME'HIGH; + Schd0.inp0 := TIME'HIGH; + Schd0.InpX := NOW + tpd(tr0z); + WHEN 'f' => Schd1.inp0 := TIME'HIGH; + Schd1.inp1 := TIME'HIGH; + Schd1.InpX := NOW + tpd(trz1); + Schd0.inp0 := TIME'HIGH; + Schd0.inp1 := TIME'HIGH; + Schd0.InpX := NOW + tpd(trz0); + WHEN 'x' => Schd1.inp0 := TIME'HIGH; + Schd1.inp1 := TIME'HIGH; + Schd1.InpX := NOW + Minimum(tpd(tr10),tpd(tr01)); + Schd0.inp0 := TIME'HIGH; + Schd0.inp1 := TIME'HIGH; + Schd0.InpX := NOW + Minimum(tpd(tr10),tpd(tr01)); + WHEN OTHERS => NULL; -- no timing change + END CASE; + END; + + --------------------------------------------------------------------------- + -- Procedure : GetSchedDelay + -- + -- Purpose : GetSchedDelay computes the final delay (incremental) for + -- for scheduling an output signal. The delay is computed + -- from the absolute output times in the 'NewSched' parameter. + -- (See BufPath, InvPath). + -- + -- Computation of the output delay for non-3_state outputs + -- consists of selection the appropriate output time based + -- on the new output value 'NewValue' and subtracting 'NOW' + -- to convert to an incremental delay value. + -- + -- The Computation of the output delay for 3_state output + -- also includes combination of the enable path delay with + -- the date path delay. + -- + -- Parameters : NewDelay... Returned output delay value. + -- GlchDelay.. Returned output delay for the start of a glitch. + -- NewValue... New output value. + -- CurValue... Current value of the output. + -- NewSched... Composite containing the combined absolute + -- output times from the data inputs. + -- EnSched1... Composite containing the combined absolute + -- output times from the enable input(s). + -- (for a 3_state output transitions 1->Z, Z->1) + -- EnSched0... Composite containing the combined absolute + -- output times from the enable input(s). + -- (for a 3_state output transitions 0->Z, Z->0) + -- + --------------------------------------------------------------------------- + PROCEDURE GetSchedDelay ( + VARIABLE NewDelay : OUT TIME; + VARIABLE GlchDelay : OUT TIME; + CONSTANT NewValue : IN std_ulogic; + CONSTANT CurValue : IN std_ulogic; + CONSTANT NewSched : IN SchedType + ) IS + VARIABLE Tim, Glch : TIME; + BEGIN + + CASE To_UX01(NewValue) IS + WHEN '0' => Tim := NewSched.inp0; + Glch := NewSched.Glch1; + WHEN '1' => Tim := NewSched.inp1; + Glch := NewSched.Glch0; + WHEN OTHERS => Tim := NewSched.InpX; + Glch := -1 ns; + END CASE; + IF (CurValue /= NewValue) + THEN Glch := -1 ns; + END IF; + + NewDelay := Tim - NOW; + IF Glch < 0 ns + THEN GlchDelay := Glch; + ELSE GlchDelay := Glch - NOW; + END IF; -- glch < 0 ns + END; + + PROCEDURE GetSchedDelay ( + VARIABLE NewDelay : OUT VitalTimeArray; + VARIABLE GlchDelay : OUT VitalTimeArray; + CONSTANT NewValue : IN std_logic_vector; + CONSTANT CurValue : IN std_logic_vector; + CONSTANT NewSched : IN SchedArray + ) IS + VARIABLE Tim, Glch : TIME; + ALIAS NewDelayAlias : VitalTimeArray( NewDelay'LENGTH DOWNTO 1) + IS NewDelay; + ALIAS GlchDelayAlias : VitalTimeArray(GlchDelay'LENGTH DOWNTO 1) + IS GlchDelay; + ALIAS NewSchedAlias : SchedArray( NewSched'LENGTH DOWNTO 1) + IS NewSched; + ALIAS NewValueAlias : std_logic_vector ( NewValue'LENGTH DOWNTO 1 ) + IS NewValue; + ALIAS CurValueAlias : std_logic_vector ( CurValue'LENGTH DOWNTO 1 ) + IS CurValue; + BEGIN + FOR n IN NewDelay'LENGTH DOWNTO 1 LOOP + CASE To_UX01(NewValueAlias(n)) IS + WHEN '0' => Tim := NewSchedAlias(n).inp0; + Glch := NewSchedAlias(n).Glch1; + WHEN '1' => Tim := NewSchedAlias(n).inp1; + Glch := NewSchedAlias(n).Glch0; + WHEN OTHERS => Tim := NewSchedAlias(n).InpX; + Glch := -1 ns; + END CASE; + IF (CurValueAlias(n) /= NewValueAlias(n)) + THEN Glch := -1 ns; + END IF; + + NewDelayAlias(n) := Tim - NOW; + IF Glch < 0 ns + THEN GlchDelayAlias(n) := Glch; + ELSE GlchDelayAlias(n) := Glch - NOW; + END IF; -- glch < 0 ns + END LOOP; + RETURN; + END; + + PROCEDURE GetSchedDelay ( + VARIABLE NewDelay : OUT TIME; + VARIABLE GlchDelay : OUT TIME; + CONSTANT NewValue : IN std_ulogic; + CONSTANT CurValue : IN std_ulogic; + CONSTANT NewSched : IN SchedType; + CONSTANT EnSched1 : IN SchedType; + CONSTANT EnSched0 : IN SchedType + ) IS + SUBTYPE v2 IS std_logic_vector(0 TO 1); + VARIABLE Tim, Glch : TIME; + BEGIN + + CASE v2'(To_X01Z(CurValue) & To_X01Z(NewValue)) IS + WHEN "00" => Tim := Maximum (NewSched.inp0, EnSched0.inp1); + Glch := GlitchMinTime(NewSched.Glch1,EnSched0.Glch0); + WHEN "01" => Tim := Maximum (NewSched.inp1, EnSched1.inp1); + Glch := EnSched1.Glch0; + WHEN "0Z" => Tim := EnSched0.inp0; + Glch := NewSched.Glch1; + WHEN "0X" => Tim := Maximum (NewSched.InpX, EnSched1.InpX); + Glch := 0 ns; + WHEN "10" => Tim := Maximum (NewSched.inp0, EnSched0.inp1); + Glch := EnSched0.Glch0; + WHEN "11" => Tim := Maximum (NewSched.inp1, EnSched1.inp1); + Glch := GlitchMinTime(NewSched.Glch0,EnSched1.Glch0); + WHEN "1Z" => Tim := EnSched1.inp0; + Glch := NewSched.Glch0; + WHEN "1X" => Tim := Maximum (NewSched.InpX, EnSched0.InpX); + Glch := 0 ns; + WHEN "Z0" => Tim := Maximum (NewSched.inp0, EnSched0.inp1); + IF NewSched.Glch0 > NOW + THEN Glch := Maximum(NewSched.Glch1,EnSched1.inp1); + ELSE Glch := 0 ns; + END IF; + WHEN "Z1" => Tim := Maximum (NewSched.inp1, EnSched1.inp1); + IF NewSched.Glch1 > NOW + THEN Glch := Maximum(NewSched.Glch0,EnSched0.inp1); + ELSE Glch := 0 ns; + END IF; + WHEN "ZX" => Tim := Maximum (NewSched.InpX, EnSched1.InpX); + Glch := 0 ns; + WHEN "ZZ" => Tim := Maximum (EnSched1.InpX, EnSched0.InpX); + Glch := 0 ns; + WHEN "X0" => Tim := Maximum (NewSched.inp0, EnSched0.inp1); + Glch := 0 ns; + WHEN "X1" => Tim := Maximum (NewSched.inp1, EnSched1.inp1); + Glch := 0 ns; + WHEN "XZ" => Tim := Maximum (EnSched1.InpX, EnSched0.InpX); + Glch := 0 ns; + WHEN OTHERS => Tim := Maximum (NewSched.InpX, EnSched1.InpX); + Glch := 0 ns; + + END CASE; + NewDelay := Tim - NOW; + IF Glch < 0 ns + THEN GlchDelay := Glch; + ELSE GlchDelay := Glch - NOW; + END IF; -- glch < 0 ns + END; + + --------------------------------------------------------------------------- + -- Operators and Functions for combination (selection) of path delays + -- > These functions support selection of the "appripriate" path delay + -- dependent on the logic function. + -- > These functions only "select" from the possable output times. No + -- calculation (addition) of delays is performed. + -- > See description of 'BufPath', 'InvPath' and 'GetSchedDelay' + -- > See primitive PROCEDURE models for examples. + --------------------------------------------------------------------------- + + FUNCTION "not" ( + CONSTANT a : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + z.inp1 := a.inp0 ; + z.inp0 := a.inp1 ; + z.InpX := a.InpX ; + z.Glch1 := a.Glch0; + z.Glch0 := a.Glch1; + RETURN (z); + END; + + FUNCTION "and" ( + CONSTANT a, b : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + z.inp1 := Maximum ( a.inp1 , b.inp1 ); + z.inp0 := Minimum ( a.inp0 , b.inp0 ); + z.InpX := GlitchMinTime ( a.InpX , b.InpX ); + z.Glch1 := Maximum ( a.Glch1, b.Glch1 ); + z.Glch0 := GlitchMinTime ( a.Glch0, b.Glch0 ); + RETURN (z); + END; + + FUNCTION "or" ( + CONSTANT a, b : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + z.inp0 := Maximum ( a.inp0 , b.inp0 ); + z.inp1 := Minimum ( a.inp1 , b.inp1 ); + z.InpX := GlitchMinTime ( a.InpX , b.InpX ); + z.Glch0 := Maximum ( a.Glch0, b.Glch0 ); + z.Glch1 := GlitchMinTime ( a.Glch1, b.Glch1 ); + RETURN (z); + END; + + IMPURE FUNCTION "nand" ( + CONSTANT a, b : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + z.inp0 := Maximum ( a.inp1 , b.inp1 ); + z.inp1 := Minimum ( a.inp0 , b.inp0 ); + z.InpX := GlitchMinTime ( a.InpX , b.InpX ); + z.Glch0 := Maximum ( a.Glch1, b.Glch1 ); + z.Glch1 := GlitchMinTime ( a.Glch0, b.Glch0 ); + RETURN (z); + END; + + IMPURE FUNCTION "nor" ( + CONSTANT a, b : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + z.inp1 := Maximum ( a.inp0 , b.inp0 ); + z.inp0 := Minimum ( a.inp1 , b.inp1 ); + z.InpX := GlitchMinTime ( a.InpX , b.InpX ); + z.Glch1 := Maximum ( a.Glch0, b.Glch0 ); + z.Glch0 := GlitchMinTime ( a.Glch1, b.Glch1 ); + RETURN (z); + END; + + -- ------------------------------------------------------------------------ + -- Delay Calculation for 2-bit Logical gates. + -- ------------------------------------------------------------------------ + IMPURE FUNCTION VitalXOR2 ( + CONSTANT ab,ai, bb,bi : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + -- z = (a AND b) NOR (a NOR b) + z.inp1 := Maximum ( Minimum (ai.inp0 , bi.inp0 ), + Minimum (ab.inp1 , bb.inp1 ) ); + z.inp0 := Minimum ( Maximum (ai.inp1 , bi.inp1 ), + Maximum (ab.inp0 , bb.inp0 ) ); + z.InpX := Maximum ( Maximum (ai.InpX , bi.InpX ), + Maximum (ab.InpX , bb.InpX ) ); + z.Glch1 := Maximum (GlitchMinTime (ai.Glch0, bi.Glch0), + GlitchMinTime (ab.Glch1, bb.Glch1) ); + z.Glch0 := GlitchMinTime ( Maximum (ai.Glch1, bi.Glch1), + Maximum (ab.Glch0, bb.Glch0) ); + RETURN (z); + END; + + IMPURE FUNCTION VitalXNOR2 ( + CONSTANT ab,ai, bb,bi : IN SchedType + ) RETURN SchedType IS + VARIABLE z : SchedType; + BEGIN + -- z = (a AND b) OR (a NOR b) + z.inp0 := Maximum ( Minimum (ab.inp0 , bb.inp0 ), + Minimum (ai.inp1 , bi.inp1 ) ); + z.inp1 := Minimum ( Maximum (ab.inp1 , bb.inp1 ), + Maximum (ai.inp0 , bi.inp0 ) ); + z.InpX := Maximum ( Maximum (ab.InpX , bb.InpX ), + Maximum (ai.InpX , bi.InpX ) ); + z.Glch0 := Maximum (GlitchMinTime (ab.Glch0, bb.Glch0), + GlitchMinTime (ai.Glch1, bi.Glch1) ); + z.Glch1 := GlitchMinTime ( Maximum (ab.Glch1, bb.Glch1), + Maximum (ai.Glch0, bi.Glch0) ); + RETURN (z); + END; + + -- ------------------------------------------------------------------------ + -- Delay Calculation for 3-bit Logical gates. + -- ------------------------------------------------------------------------ + IMPURE FUNCTION VitalXOR3 ( + CONSTANT ab,ai, bb,bi, cb,ci : IN SchedType ) + RETURN SchedType IS + BEGIN + RETURN VitalXOR2 ( VitalXOR2 (ab,ai, bb,bi), + VitalXOR2 (ai,ab, bi,bb), + cb, ci ); + END; + + IMPURE FUNCTION VitalXNOR3 ( + CONSTANT ab,ai, bb,bi, cb,ci : IN SchedType ) + RETURN SchedType IS + BEGIN + RETURN VitalXNOR2 ( VitalXOR2 ( ab,ai, bb,bi ), + VitalXOR2 ( ai,ab, bi,bb ), + cb, ci ); + END; + + -- ------------------------------------------------------------------------ + -- Delay Calculation for 4-bit Logical gates. + -- ------------------------------------------------------------------------ + IMPURE FUNCTION VitalXOR4 ( + CONSTANT ab,ai, bb,bi, cb,ci, db,di : IN SchedType ) + RETURN SchedType IS + BEGIN + RETURN VitalXOR2 ( VitalXOR2 ( ab,ai, bb,bi ), + VitalXOR2 ( ai,ab, bi,bb ), + VitalXOR2 ( cb,ci, db,di ), + VitalXOR2 ( ci,cb, di,db ) ); + END; + + IMPURE FUNCTION VitalXNOR4 ( + CONSTANT ab,ai, bb,bi, cb,ci, db,di : IN SchedType ) + RETURN SchedType IS + BEGIN + RETURN VitalXNOR2 ( VitalXOR2 ( ab,ai, bb,bi ), + VitalXOR2 ( ai,ab, bi,bb ), + VitalXOR2 ( cb,ci, db,di ), + VitalXOR2 ( ci,cb, di,db ) ); + END; + + -- ------------------------------------------------------------------------ + -- Delay Calculation for N-bit Logical gates. + -- ------------------------------------------------------------------------ + -- Note: index range on datab,datai assumed to be 1 TO length. + -- This is enforced by internal only usage of this Function + IMPURE FUNCTION VitalXOR ( + CONSTANT DataB, DataI : IN SchedArray + ) RETURN SchedType IS + CONSTANT Leng : INTEGER := DataB'LENGTH; + BEGIN + IF Leng = 2 THEN + RETURN VitalXOR2 ( DataB(1),DataI(1), DataB(2),DataI(2) ); + ELSE + RETURN VitalXOR2 ( VitalXOR ( DataB(1 TO Leng-1), + DataI(1 TO Leng-1) ), + VitalXOR ( DataI(1 TO Leng-1), + DataB(1 TO Leng-1) ), + DataB(Leng),DataI(Leng) ); + END IF; + END; + + -- Note: index range on datab,datai assumed to be 1 TO length. + -- This is enforced by internal only usage of this Function + IMPURE FUNCTION VitalXNOR ( + CONSTANT DataB, DataI : IN SchedArray + ) RETURN SchedType IS + CONSTANT Leng : INTEGER := DataB'LENGTH; + BEGIN + IF Leng = 2 THEN + RETURN VitalXNOR2 ( DataB(1),DataI(1), DataB(2),DataI(2) ); + ELSE + RETURN VitalXNOR2 ( VitalXOR ( DataB(1 TO Leng-1), + DataI(1 TO Leng-1) ), + VitalXOR ( DataI(1 TO Leng-1), + DataB(1 TO Leng-1) ), + DataB(Leng),DataI(Leng) ); + END IF; + END; + + -- ------------------------------------------------------------------------ + -- Multiplexor + -- MUX .......... result := data(dselect) + -- MUX2 .......... 2-input mux; result := data0 when (dselect = '0'), + -- data1 when (dselect = '1'), + -- 'X' when (dselect = 'X') and (data0 /= data1) + -- MUX4 .......... 4-input mux; result := data(dselect) + -- MUX8 .......... 8-input mux; result := data(dselect) + -- ------------------------------------------------------------------------ + FUNCTION VitalMUX2 ( + CONSTANT d1, d0 : IN SchedType; + CONSTANT sb, SI : IN SchedType + ) RETURN SchedType IS + BEGIN + RETURN (d1 AND sb) OR (d0 AND (NOT SI) ); + END; +-- + FUNCTION VitalMUX4 ( + CONSTANT Data : IN SchedArray4; + CONSTANT sb : IN SchedArray2; + CONSTANT SI : IN SchedArray2 + ) RETURN SchedType IS + BEGIN + RETURN ( sb(1) AND VitalMUX2(Data(3),Data(2), sb(0), SI(0)) ) + OR ( (NOT SI(1)) AND VitalMUX2(Data(1),Data(0), sb(0), SI(0)) ); + END; + + FUNCTION VitalMUX8 ( + CONSTANT Data : IN SchedArray8; + CONSTANT sb : IN SchedArray3; + CONSTANT SI : IN SchedArray3 + ) RETURN SchedType IS + BEGIN + RETURN ( ( sb(2)) AND VitalMUX4 (Data(7 DOWNTO 4), + sb(1 DOWNTO 0), SI(1 DOWNTO 0) ) ) + OR ( (NOT SI(2)) AND VitalMUX4 (Data(3 DOWNTO 0), + sb(1 DOWNTO 0), SI(1 DOWNTO 0) ) ); + END; +-- + FUNCTION VInterMux ( + CONSTANT Data : IN SchedArray; + CONSTANT sb : IN SchedArray; + CONSTANT SI : IN SchedArray + ) RETURN SchedType IS + CONSTANT sMsb : INTEGER := sb'LENGTH; + CONSTANT dMsbHigh : INTEGER := Data'LENGTH; + CONSTANT dMsbLow : INTEGER := Data'LENGTH/2; + BEGIN + IF sb'LENGTH = 1 THEN + RETURN VitalMUX2( Data(2), Data(1), sb(1), SI(1) ); + ELSIF sb'LENGTH = 2 THEN + RETURN VitalMUX4( Data, sb, SI ); + ELSIF sb'LENGTH = 3 THEN + RETURN VitalMUX8( Data, sb, SI ); + ELSIF sb'LENGTH > 3 THEN + RETURN (( sb(sMsb)) AND VInterMux( Data(dMsbLow DOWNTO 1), + sb(sMsb-1 DOWNTO 1), + SI(sMsb-1 DOWNTO 1) )) + OR ((NOT SI(sMsb)) AND VInterMux( Data(dMsbHigh DOWNTO dMsbLow+1), + sb(sMsb-1 DOWNTO 1), + SI(sMsb-1 DOWNTO 1) )); + ELSE + RETURN (0 ns, 0 ns, 0 ns, 0 ns, 0 ns); -- dselect'LENGTH < 1 + END IF; + END; +-- + FUNCTION VitalMUX ( + CONSTANT Data : IN SchedArray; + CONSTANT sb : IN SchedArray; + CONSTANT SI : IN SchedArray + ) RETURN SchedType IS + CONSTANT msb : INTEGER := 2**sb'LENGTH; + VARIABLE lDat : SchedArray(msb DOWNTO 1); + ALIAS DataAlias : SchedArray ( Data'LENGTH DOWNTO 1 ) IS Data; + ALIAS sbAlias : SchedArray ( sb'LENGTH DOWNTO 1 ) IS sb; + ALIAS siAlias : SchedArray ( SI'LENGTH DOWNTO 1 ) IS SI; + BEGIN + IF Data'LENGTH <= msb THEN + FOR i IN Data'LENGTH DOWNTO 1 LOOP + lDat(i) := DataAlias(i); + END LOOP; + FOR i IN msb DOWNTO Data'LENGTH+1 LOOP + lDat(i) := DefSchedAnd; + END LOOP; + ELSE + FOR i IN msb DOWNTO 1 LOOP + lDat(i) := DataAlias(i); + END LOOP; + END IF; + RETURN VInterMux( lDat, sbAlias, siAlias ); + END; + + -- ------------------------------------------------------------------------ + -- Decoder + -- General Algorithm : + -- (a) Result(...) := '0' when (enable = '0') + -- (b) Result(data) := '1'; all other subelements = '0' + -- ... Result array is decending (n-1 downto 0) + -- + -- DECODERn .......... n:2**n decoder + -- ------------------------------------------------------------------------ + FUNCTION VitalDECODER2 ( + CONSTANT DataB : IN SchedType; + CONSTANT DataI : IN SchedType; + CONSTANT Enable : IN SchedType + ) RETURN SchedArray IS + VARIABLE Result : SchedArray2; + BEGIN + Result(1) := Enable AND ( DataB); + Result(0) := Enable AND (NOT DataI); + RETURN Result; + END; + + FUNCTION VitalDECODER4 ( + CONSTANT DataB : IN SchedArray2; + CONSTANT DataI : IN SchedArray2; + CONSTANT Enable : IN SchedType + ) RETURN SchedArray IS + VARIABLE Result : SchedArray4; + BEGIN + Result(3) := Enable AND ( DataB(1)) AND ( DataB(0)); + Result(2) := Enable AND ( DataB(1)) AND (NOT DataI(0)); + Result(1) := Enable AND (NOT DataI(1)) AND ( DataB(0)); + Result(0) := Enable AND (NOT DataI(1)) AND (NOT DataI(0)); + RETURN Result; + END; + + FUNCTION VitalDECODER8 ( + CONSTANT DataB : IN SchedArray3; + CONSTANT DataI : IN SchedArray3; + CONSTANT Enable : IN SchedType + ) RETURN SchedArray IS + VARIABLE Result : SchedArray8; + BEGIN + Result(7):= Enable AND ( DataB(2))AND( DataB(1))AND( DataB(0)); + Result(6):= Enable AND ( DataB(2))AND( DataB(1))AND(NOT DataI(0)); + Result(5):= Enable AND ( DataB(2))AND(NOT DataI(1))AND( DataB(0)); + Result(4):= Enable AND ( DataB(2))AND(NOT DataI(1))AND(NOT DataI(0)); + Result(3):= Enable AND (NOT DataI(2))AND( DataB(1))AND( DataB(0)); + Result(2):= Enable AND (NOT DataI(2))AND( DataB(1))AND(NOT DataI(0)); + Result(1):= Enable AND (NOT DataI(2))AND(NOT DataI(1))AND( DataB(0)); + Result(0):= Enable AND (NOT DataI(2))AND(NOT DataI(1))AND(NOT DataI(0)); + RETURN Result; + END; + + + FUNCTION VitalDECODER ( + CONSTANT DataB : IN SchedArray; + CONSTANT DataI : IN SchedArray; + CONSTANT Enable : IN SchedType + ) RETURN SchedArray IS + CONSTANT DMsb : INTEGER := DataB'LENGTH - 1; + ALIAS DataBAlias : SchedArray ( DMsb DOWNTO 0 ) IS DataB; + ALIAS DataIAlias : SchedArray ( DMsb DOWNTO 0 ) IS DataI; + BEGIN + IF DataB'LENGTH = 1 THEN + RETURN VitalDECODER2 ( DataBAlias( 0 ), + DataIAlias( 0 ), Enable ); + ELSIF DataB'LENGTH = 2 THEN + RETURN VitalDECODER4 ( DataBAlias(1 DOWNTO 0), + DataIAlias(1 DOWNTO 0), Enable ); + ELSIF DataB'LENGTH = 3 THEN + RETURN VitalDECODER8 ( DataBAlias(2 DOWNTO 0), + DataIAlias(2 DOWNTO 0), Enable ); + ELSIF DataB'LENGTH > 3 THEN + RETURN VitalDECODER ( DataBAlias(DMsb-1 DOWNTO 0), + DataIAlias(DMsb-1 DOWNTO 0), + Enable AND ( DataBAlias(DMsb)) ) + & VitalDECODER ( DataBAlias(DMsb-1 DOWNTO 0), + DataIAlias(DMsb-1 DOWNTO 0), + Enable AND (NOT DataIAlias(DMsb)) ); + ELSE + RETURN DefSchedArray2; + END IF; + END; + + +------------------------------------------------------------------------------- +-- PRIMITIVES +------------------------------------------------------------------------------- + -- ------------------------------------------------------------------------ + -- N-bit wide Logical gates. + -- ------------------------------------------------------------------------ + FUNCTION VitalAND ( + CONSTANT Data : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + Result := '1'; + FOR i IN Data'RANGE LOOP + Result := Result AND Data(i); + END LOOP; + RETURN ResultMap(Result); + END; +-- + FUNCTION VitalOR ( + CONSTANT Data : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + Result := '0'; + FOR i IN Data'RANGE LOOP + Result := Result OR Data(i); + END LOOP; + RETURN ResultMap(Result); + END; +-- + FUNCTION VitalXOR ( + CONSTANT Data : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + Result := '0'; + FOR i IN Data'RANGE LOOP + Result := Result XOR Data(i); + END LOOP; + RETURN ResultMap(Result); + END; +-- + FUNCTION VitalNAND ( + CONSTANT Data : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + Result := '1'; + FOR i IN Data'RANGE LOOP + Result := Result AND Data(i); + END LOOP; + RETURN ResultMap(NOT Result); + END; +-- + FUNCTION VitalNOR ( + CONSTANT Data : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + Result := '0'; + FOR i IN Data'RANGE LOOP + Result := Result OR Data(i); + END LOOP; + RETURN ResultMap(NOT Result); + END; +-- + FUNCTION VitalXNOR ( + CONSTANT Data : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + Result := '0'; + FOR i IN Data'RANGE LOOP + Result := Result XOR Data(i); + END LOOP; + RETURN ResultMap(NOT Result); + END; + + -- ------------------------------------------------------------------------ + -- Commonly used 2-bit Logical gates. + -- ------------------------------------------------------------------------ + FUNCTION VitalAND2 ( + CONSTANT a, b : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a AND b); + END; +-- + FUNCTION VitalOR2 ( + CONSTANT a, b : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a OR b); + END; +-- + FUNCTION VitalXOR2 ( + CONSTANT a, b : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a XOR b); + END; +-- + FUNCTION VitalNAND2 ( + CONSTANT a, b : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a NAND b); + END; +-- + FUNCTION VitalNOR2 ( + CONSTANT a, b : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a NOR b); + END; +-- + FUNCTION VitalXNOR2 ( + CONSTANT a, b : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a XOR b)); + END; +-- + -- ------------------------------------------------------------------------ + -- Commonly used 3-bit Logical gates. + -- ------------------------------------------------------------------------ + FUNCTION VitalAND3 ( + CONSTANT a, b, c : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a AND b AND c); + END; +-- + FUNCTION VitalOR3 ( + CONSTANT a, b, c : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a OR b OR c); + END; +-- + FUNCTION VitalXOR3 ( + CONSTANT a, b, c : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a XOR b XOR c); + END; +-- + FUNCTION VitalNAND3 ( + CONSTANT a, b, c : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a AND b AND c)); + END; +-- + FUNCTION VitalNOR3 ( + CONSTANT a, b, c : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a OR b OR c)); + END; +-- + FUNCTION VitalXNOR3 ( + CONSTANT a, b, c : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a XOR b XOR c)); + END; + + -- --------------------------------------------------------------------------- + -- Commonly used 4-bit Logical gates. + -- --------------------------------------------------------------------------- + FUNCTION VitalAND4 ( + CONSTANT a, b, c, d : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a AND b AND c AND d); + END; +-- + FUNCTION VitalOR4 ( + CONSTANT a, b, c, d : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a OR b OR c OR d); + END; +-- + FUNCTION VitalXOR4 ( + CONSTANT a, b, c, d : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(a XOR b XOR c XOR d); + END; +-- + FUNCTION VitalNAND4 ( + CONSTANT a, b, c, d : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a AND b AND c AND d)); + END; +-- + FUNCTION VitalNOR4 ( + CONSTANT a, b, c, d : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a OR b OR c OR d)); + END; +-- + FUNCTION VitalXNOR4 ( + CONSTANT a, b, c, d : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT (a XOR b XOR c XOR d)); + END; + + -- ------------------------------------------------------------------------ + -- Buffers + -- BUF ....... standard non-inverting buffer + -- BUFIF0 ....... non-inverting buffer Data passes thru if (Enable = '0') + -- BUFIF1 ....... non-inverting buffer Data passes thru if (Enable = '1') + -- ------------------------------------------------------------------------ + FUNCTION VitalBUF ( + CONSTANT Data : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(To_UX01(Data)); + END; +-- + FUNCTION VitalBUFIF0 ( + CONSTANT Data, Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(BufIf0_Table(Enable,Data)); + END; +-- + FUNCTION VitalBUFIF1 ( + CONSTANT Data, Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(BufIf1_Table(Enable,Data)); + END; + FUNCTION VitalIDENT ( + CONSTANT Data : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(To_UX01Z(Data)); + END; + + -- ------------------------------------------------------------------------ + -- Invertors + -- INV ......... standard inverting buffer + -- INVIF0 ......... inverting buffer Data passes thru if (Enable = '0') + -- INVIF1 ......... inverting buffer Data passes thru if (Enable = '1') + -- ------------------------------------------------------------------------ + FUNCTION VitalINV ( + CONSTANT Data : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(NOT Data); + END; +-- + FUNCTION VitalINVIF0 ( + CONSTANT Data, Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(InvIf0_Table(Enable,Data)); + END; +-- + FUNCTION VitalINVIF1 ( + CONSTANT Data, Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) RETURN std_ulogic IS + BEGIN + RETURN ResultMap(InvIf1_Table(Enable,Data)); + END; + + -- ------------------------------------------------------------------------ + -- Multiplexor + -- MUX .......... result := data(dselect) + -- MUX2 .......... 2-input mux; result := data0 when (dselect = '0'), + -- data1 when (dselect = '1'), + -- 'X' when (dselect = 'X') and (data0 /= data1) + -- MUX4 .......... 4-input mux; result := data(dselect) + -- MUX8 .......... 8-input mux; result := data(dselect) + -- ------------------------------------------------------------------------ + FUNCTION VitalMUX2 ( + CONSTANT Data1, Data0 : IN std_ulogic; + CONSTANT dSelect : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + CASE To_X01(dSelect) IS + WHEN '0' => Result := To_UX01(Data0); + WHEN '1' => Result := To_UX01(Data1); + WHEN OTHERS => Result := VitalSame( Data1, Data0 ); + END CASE; + RETURN ResultMap(Result); + END; +-- + FUNCTION VitalMUX4 ( + CONSTANT Data : IN std_logic_vector4; + CONSTANT dSelect : IN std_logic_vector2; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Slct : std_logic_vector2; + VARIABLE Result : UX01; + BEGIN + Slct := To_X01(dSelect); + CASE Slct IS + WHEN "00" => Result := To_UX01(Data(0)); + WHEN "01" => Result := To_UX01(Data(1)); + WHEN "10" => Result := To_UX01(Data(2)); + WHEN "11" => Result := To_UX01(Data(3)); + WHEN "0X" => Result := VitalSame( Data(1), Data(0) ); + WHEN "1X" => Result := VitalSame( Data(2), Data(3) ); + WHEN "X0" => Result := VitalSame( Data(2), Data(0) ); + WHEN "X1" => Result := VitalSame( Data(3), Data(1) ); + WHEN OTHERS => Result := VitalSame( VitalSame(Data(3),Data(2)), + VitalSame(Data(1),Data(0))); + END CASE; + RETURN ResultMap(Result); + END; +-- + FUNCTION VitalMUX8 ( + CONSTANT Data : IN std_logic_vector8; + CONSTANT dSelect : IN std_logic_vector3; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + VARIABLE Result : UX01; + BEGIN + CASE To_X01(dSelect(2)) IS + WHEN '0' => Result := VitalMUX4( Data(3 DOWNTO 0), + dSelect(1 DOWNTO 0)); + WHEN '1' => Result := VitalMUX4( Data(7 DOWNTO 4), + dSelect(1 DOWNTO 0)); + WHEN OTHERS => Result := VitalSame( VitalMUX4( Data(3 DOWNTO 0), + dSelect(1 DOWNTO 0)), + VitalMUX4( Data(7 DOWNTO 4), + dSelect(1 DOWNTO 0))); + END CASE; + RETURN ResultMap(Result); + END; +-- + FUNCTION VInterMux ( + CONSTANT Data : IN std_logic_vector; + CONSTANT dSelect : IN std_logic_vector + ) RETURN std_ulogic IS + + CONSTANT sMsb : INTEGER := dSelect'LENGTH; + CONSTANT dMsbHigh : INTEGER := Data'LENGTH; + CONSTANT dMsbLow : INTEGER := Data'LENGTH/2; + ALIAS DataAlias : std_logic_vector ( Data'LENGTH DOWNTO 1) IS Data; + ALIAS dSelAlias : std_logic_vector (dSelect'LENGTH DOWNTO 1) IS dSelect; + + VARIABLE Result : UX01; + BEGIN + IF dSelect'LENGTH = 1 THEN + Result := VitalMUX2( DataAlias(2), DataAlias(1), dSelAlias(1) ); + ELSIF dSelect'LENGTH = 2 THEN + Result := VitalMUX4( DataAlias, dSelAlias ); + ELSIF dSelect'LENGTH > 2 THEN + CASE To_X01(dSelect(sMsb)) IS + WHEN '0' => + Result := VInterMux( DataAlias(dMsbLow DOWNTO 1), + dSelAlias(sMsb-1 DOWNTO 1) ); + WHEN '1' => + Result := VInterMux( DataAlias(dMsbHigh DOWNTO dMsbLow+1), + dSelAlias(sMsb-1 DOWNTO 1) ); + WHEN OTHERS => + Result := VitalSame( + VInterMux( DataAlias(dMsbLow DOWNTO 1), + dSelAlias(sMsb-1 DOWNTO 1) ), + VInterMux( DataAlias(dMsbHigh DOWNTO dMsbLow+1), + dSelAlias(sMsb-1 DOWNTO 1) ) + ); + END CASE; + ELSE + Result := 'X'; -- dselect'LENGTH < 1 + END IF; + RETURN Result; + END; +-- + FUNCTION VitalMUX ( + CONSTANT Data : IN std_logic_vector; + CONSTANT dSelect : IN std_logic_vector; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_ulogic IS + CONSTANT msb : INTEGER := 2**dSelect'LENGTH; + ALIAS DataAlias : std_logic_vector ( Data'LENGTH DOWNTO 1) IS Data; + ALIAS dSelAlias : std_logic_vector (dSelect'LENGTH DOWNTO 1) IS dSelect; + VARIABLE lDat : std_logic_vector(msb DOWNTO 1) := (OTHERS=>'X'); + VARIABLE Result : UX01; + BEGIN + IF Data'LENGTH <= msb THEN + FOR i IN Data'LENGTH DOWNTO 1 LOOP + lDat(i) := DataAlias(i); + END LOOP; + ELSE + FOR i IN msb DOWNTO 1 LOOP + lDat(i) := DataAlias(i); + END LOOP; + END IF; + Result := VInterMux( lDat, dSelAlias ); + RETURN ResultMap(Result); + END; + + -- ------------------------------------------------------------------------ + -- Decoder + -- General Algorithm : + -- (a) Result(...) := '0' when (enable = '0') + -- (b) Result(data) := '1'; all other subelements = '0' + -- ... Result array is decending (n-1 downto 0) + -- + -- DECODERn .......... n:2**n decoder + -- ------------------------------------------------------------------------ + FUNCTION VitalDECODER2 ( + CONSTANT Data : IN std_ulogic; + CONSTANT Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_logic_vector2 IS + VARIABLE Result : std_logic_vector2; + BEGIN + Result(1) := ResultMap(Enable AND ( Data)); + Result(0) := ResultMap(Enable AND (NOT Data)); + RETURN Result; + END; +-- + FUNCTION VitalDECODER4 ( + CONSTANT Data : IN std_logic_vector2; + CONSTANT Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_logic_vector4 IS + VARIABLE Result : std_logic_vector4; + BEGIN + Result(3) := ResultMap(Enable AND ( Data(1)) AND ( Data(0))); + Result(2) := ResultMap(Enable AND ( Data(1)) AND (NOT Data(0))); + Result(1) := ResultMap(Enable AND (NOT Data(1)) AND ( Data(0))); + Result(0) := ResultMap(Enable AND (NOT Data(1)) AND (NOT Data(0))); + RETURN Result; + END; +-- + FUNCTION VitalDECODER8 ( + CONSTANT Data : IN std_logic_vector3; + CONSTANT Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_logic_vector8 IS + VARIABLE Result : std_logic_vector8; + BEGIN + Result(7) := ( Data(2)) AND ( Data(1)) AND ( Data(0)); + Result(6) := ( Data(2)) AND ( Data(1)) AND (NOT Data(0)); + Result(5) := ( Data(2)) AND (NOT Data(1)) AND ( Data(0)); + Result(4) := ( Data(2)) AND (NOT Data(1)) AND (NOT Data(0)); + Result(3) := (NOT Data(2)) AND ( Data(1)) AND ( Data(0)); + Result(2) := (NOT Data(2)) AND ( Data(1)) AND (NOT Data(0)); + Result(1) := (NOT Data(2)) AND (NOT Data(1)) AND ( Data(0)); + Result(0) := (NOT Data(2)) AND (NOT Data(1)) AND (NOT Data(0)); + + Result(0) := ResultMap ( Enable AND Result(0) ); + Result(1) := ResultMap ( Enable AND Result(1) ); + Result(2) := ResultMap ( Enable AND Result(2) ); + Result(3) := ResultMap ( Enable AND Result(3) ); + Result(4) := ResultMap ( Enable AND Result(4) ); + Result(5) := ResultMap ( Enable AND Result(5) ); + Result(6) := ResultMap ( Enable AND Result(6) ); + Result(7) := ResultMap ( Enable AND Result(7) ); + + RETURN Result; + END; +-- + FUNCTION VitalDECODER ( + CONSTANT Data : IN std_logic_vector; + CONSTANT Enable : IN std_ulogic; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) RETURN std_logic_vector IS + + CONSTANT DMsb : INTEGER := Data'LENGTH - 1; + ALIAS DataAlias : std_logic_vector ( DMsb DOWNTO 0 ) IS Data; + BEGIN + IF Data'LENGTH = 1 THEN + RETURN VitalDECODER2 (DataAlias( 0 ), Enable, ResultMap ); + ELSIF Data'LENGTH = 2 THEN + RETURN VitalDECODER4 (DataAlias(1 DOWNTO 0), Enable, ResultMap ); + ELSIF Data'LENGTH = 3 THEN + RETURN VitalDECODER8 (DataAlias(2 DOWNTO 0), Enable, ResultMap ); + ELSIF Data'LENGTH > 3 THEN + RETURN VitalDECODER (DataAlias(DMsb-1 DOWNTO 0), + Enable AND ( DataAlias(DMsb)), ResultMap ) + & VitalDECODER (DataAlias(DMsb-1 DOWNTO 0), + Enable AND (NOT DataAlias(DMsb)), ResultMap ); + ELSE RETURN "X"; + END IF; + END; + + -- ------------------------------------------------------------------------ + -- N-bit wide Logical gates. + -- ------------------------------------------------------------------------ + PROCEDURE VitalAND ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE Data_Schd : SchedArray(Data'RANGE); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN LOOP + q <= VitalAND(Data, ResultMap); + WAIT ON Data; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := '1'; + new_schd := Data_Schd(Data_Schd'LEFT); + FOR i IN Data'RANGE LOOP + NewValue := NewValue AND Data(i); + new_schd := new_schd AND Data_Schd(i); + END LOOP; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data; + END LOOP; + END IF; --SN + END; +-- + PROCEDURE VitalOR ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE Data_Schd : SchedArray(Data'RANGE); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN LOOP + q <= VitalOR(Data, ResultMap); + WAIT ON Data; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := '0'; + new_schd := Data_Schd(Data_Schd'LEFT); + FOR i IN Data'RANGE LOOP + NewValue := NewValue OR Data(i); + new_schd := new_schd OR Data_Schd(i); + END LOOP; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data; + END LOOP; + END IF; --SN + END; +-- + PROCEDURE VitalXOR ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE DataB_Schd : SchedArray(1 TO Data'LENGTH); + VARIABLE DataI_Schd : SchedArray(1 TO Data'LENGTH); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + ALIAS ADataB_Schd : SchedArray(Data'RANGE) IS DataB_Schd; + ALIAS ADataI_Schd : SchedArray(Data'RANGE) IS DataI_Schd; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN LOOP + q <= VitalXOR(Data, ResultMap); + WAIT ON Data; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( ADataB_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + InvPath ( ADataI_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( ADataB_Schd, Data_Edge, Atpd_data_q ); + InvPath ( ADataI_Schd, Data_Edge, Atpd_data_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := VitalXOR ( Data ); + new_schd := VitalXOR ( DataB_Schd, DataI_Schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data; + END LOOP; + END IF; --SN + END; +-- + PROCEDURE VitalNAND ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE Data_Schd : SchedArray(Data'RANGE); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN LOOP + q <= VitalNAND(Data, ResultMap); + WAIT ON Data; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + InvPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + InvPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := '1'; + new_schd := Data_Schd(Data_Schd'LEFT); + FOR i IN Data'RANGE LOOP + NewValue := NewValue AND Data(i); + new_schd := new_schd AND Data_Schd(i); + END LOOP; + NewValue := NOT NewValue; + new_schd := NOT new_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNOR ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE Data_Schd : SchedArray(Data'RANGE); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN LOOP + q <= VitalNOR(Data, ResultMap); + WAIT ON Data; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + InvPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + InvPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := '0'; + new_schd := Data_Schd(Data_Schd'LEFT); + FOR i IN Data'RANGE LOOP + NewValue := NewValue OR Data(i); + new_schd := new_schd OR Data_Schd(i); + END LOOP; + NewValue := NOT NewValue; + new_schd := NOT new_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data; + END LOOP; + END IF; --SN + END; +-- + PROCEDURE VitalXNOR ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE DataB_Schd : SchedArray(1 TO Data'LENGTH); + VARIABLE DataI_Schd : SchedArray(1 TO Data'LENGTH); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + ALIAS ADataB_Schd : SchedArray(Data'RANGE) IS DataB_Schd; + ALIAS ADataI_Schd : SchedArray(Data'RANGE) IS DataI_Schd; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN LOOP + q <= VitalXNOR(Data, ResultMap); + WAIT ON Data; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( ADataB_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + InvPath ( ADataI_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( ADataB_Schd, Data_Edge, Atpd_data_q ); + InvPath ( ADataI_Schd, Data_Edge, Atpd_data_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := VitalXNOR ( Data ); + new_schd := VitalXNOR ( DataB_Schd, DataI_Schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data; + END LOOP; + END IF; --SN + END; +-- + + -- ------------------------------------------------------------------------ + -- Commonly used 2-bit Logical gates. + -- ------------------------------------------------------------------------ + PROCEDURE VitalAND2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ((tpd_a_q = VitalZeroDelay01) AND (tpd_b_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalAND2 ( a, b, ResultMap ); + WAIT ON a, b; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( a_schd, InitialEdge(a), tpd_a_q ); + BufPath ( b_schd, InitialEdge(b), tpd_b_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( a_schd, GetEdge(a), tpd_a_q ); + BufPath ( b_schd, GetEdge(b), tpd_b_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a AND b; + new_schd := a_schd AND b_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalOR2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ((tpd_a_q = VitalZeroDelay01) AND (tpd_b_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalOR2 ( a, b, ResultMap ); + WAIT ON a, b; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( a_schd, InitialEdge(a), tpd_a_q ); + BufPath ( b_schd, InitialEdge(b), tpd_b_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( a_schd, GetEdge(a), tpd_a_q ); + BufPath ( b_schd, GetEdge(b), tpd_b_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a OR b; + new_schd := a_schd OR b_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNAND2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ((tpd_a_q = VitalZeroDelay01) AND (tpd_b_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalNAND2 ( a, b, ResultMap ); + WAIT ON a, b; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( a_schd, InitialEdge(a), tpd_a_q ); + InvPath ( b_schd, InitialEdge(b), tpd_b_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( a_schd, GetEdge(a), tpd_a_q ); + InvPath ( b_schd, GetEdge(b), tpd_b_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a NAND b; + new_schd := a_schd NAND b_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNOR2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ((tpd_a_q = VitalZeroDelay01) AND (tpd_b_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalNOR2 ( a, b, ResultMap ); + WAIT ON a, b; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( a_schd, InitialEdge(a), tpd_a_q ); + InvPath ( b_schd, InitialEdge(b), tpd_b_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( a_schd, GetEdge(a), tpd_a_q ); + InvPath ( b_schd, GetEdge(b), tpd_b_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a NOR b; + new_schd := a_schd NOR b_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalXOR2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE ab_schd, bb_schd : SchedType; + VARIABLE ai_schd, bi_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ((tpd_a_q = VitalZeroDelay01) AND (tpd_b_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalXOR2 ( a, b, ResultMap ); + WAIT ON a, b; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( ab_schd, InitialEdge(a), tpd_a_q ); + InvPath ( ai_schd, InitialEdge(a), tpd_a_q ); + BufPath ( bb_schd, InitialEdge(b), tpd_b_q ); + InvPath ( bi_schd, InitialEdge(b), tpd_b_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( ab_schd, GetEdge(a), tpd_a_q ); + InvPath ( ai_schd, GetEdge(a), tpd_a_q ); + + BufPath ( bb_schd, GetEdge(b), tpd_b_q ); + InvPath ( bi_schd, GetEdge(b), tpd_b_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a XOR b; + new_schd := VitalXOR2 ( ab_schd,ai_schd, bb_schd,bi_schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalXNOR2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE ab_schd, bb_schd : SchedType; + VARIABLE ai_schd, bi_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ((tpd_a_q = VitalZeroDelay01) AND (tpd_b_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalXNOR2 ( a, b, ResultMap ); + WAIT ON a, b; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( ab_schd, InitialEdge(a), tpd_a_q ); + InvPath ( ai_schd, InitialEdge(a), tpd_a_q ); + BufPath ( bb_schd, InitialEdge(b), tpd_b_q ); + InvPath ( bi_schd, InitialEdge(b), tpd_b_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( ab_schd, GetEdge(a), tpd_a_q ); + InvPath ( ai_schd, GetEdge(a), tpd_a_q ); + + BufPath ( bb_schd, GetEdge(b), tpd_b_q ); + InvPath ( bi_schd, GetEdge(b), tpd_b_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := NOT (a XOR b); + new_schd := VitalXNOR2 ( ab_schd,ai_schd, bb_schd,bi_schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b; + END LOOP; + END IF; + END; + + -- ------------------------------------------------------------------------ + -- Commonly used 3-bit Logical gates. + -- ------------------------------------------------------------------------ + PROCEDURE VitalAND3 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN +-- + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalAND3 ( a, b, c, ResultMap ); + WAIT ON a, b, c; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( a_schd, InitialEdge(a), tpd_a_q ); + BufPath ( b_schd, InitialEdge(b), tpd_b_q ); + BufPath ( c_schd, InitialEdge(c), tpd_c_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( a_schd, GetEdge(a), tpd_a_q ); + BufPath ( b_schd, GetEdge(b), tpd_b_q ); + BufPath ( c_schd, GetEdge(c), tpd_c_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a AND b AND c; + new_schd := a_schd AND b_schd AND c_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalOR3 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalOR3 ( a, b, c, ResultMap ); + WAIT ON a, b, c; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( a_schd, InitialEdge(a), tpd_a_q ); + BufPath ( b_schd, InitialEdge(b), tpd_b_q ); + BufPath ( c_schd, InitialEdge(c), tpd_c_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( a_schd, GetEdge(a), tpd_a_q ); + BufPath ( b_schd, GetEdge(b), tpd_b_q ); + BufPath ( c_schd, GetEdge(c), tpd_c_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a OR b OR c; + new_schd := a_schd OR b_schd OR c_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNAND3 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalNAND3 ( a, b, c, ResultMap ); + WAIT ON a, b, c; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( a_schd, InitialEdge(a), tpd_a_q ); + InvPath ( b_schd, InitialEdge(b), tpd_b_q ); + InvPath ( c_schd, InitialEdge(c), tpd_c_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( a_schd, GetEdge(a), tpd_a_q ); + InvPath ( b_schd, GetEdge(b), tpd_b_q ); + InvPath ( c_schd, GetEdge(c), tpd_c_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := (a AND b) NAND c; + new_schd := (a_schd AND b_schd) NAND c_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNOR3 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalNOR3 ( a, b, c, ResultMap ); + WAIT ON a, b, c; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( a_schd, InitialEdge(a), tpd_a_q ); + InvPath ( b_schd, InitialEdge(b), tpd_b_q ); + InvPath ( c_schd, InitialEdge(c), tpd_c_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( a_schd, GetEdge(a), tpd_a_q ); + InvPath ( b_schd, GetEdge(b), tpd_b_q ); + InvPath ( c_schd, GetEdge(c), tpd_c_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := (a OR b) NOR c; + new_schd := (a_schd OR b_schd) NOR c_schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalXOR3 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE ab_schd, bb_schd, cb_schd : SchedType; + VARIABLE ai_schd, bi_schd, ci_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalXOR3 ( a, b, c, ResultMap ); + WAIT ON a, b, c; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( ab_schd, InitialEdge(a), tpd_a_q ); + InvPath ( ai_schd, InitialEdge(a), tpd_a_q ); + BufPath ( bb_schd, InitialEdge(b), tpd_b_q ); + InvPath ( bi_schd, InitialEdge(b), tpd_b_q ); + BufPath ( cb_schd, InitialEdge(c), tpd_c_q ); + InvPath ( ci_schd, InitialEdge(c), tpd_c_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( ab_schd, GetEdge(a), tpd_a_q ); + InvPath ( ai_schd, GetEdge(a), tpd_a_q ); + + BufPath ( bb_schd, GetEdge(b), tpd_b_q ); + InvPath ( bi_schd, GetEdge(b), tpd_b_q ); + + BufPath ( cb_schd, GetEdge(c), tpd_c_q ); + InvPath ( ci_schd, GetEdge(c), tpd_c_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a XOR b XOR c; + new_schd := VitalXOR3 ( ab_schd,ai_schd, + bb_schd,bi_schd, + cb_schd,ci_schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalXNOR3 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE ab_schd, bb_schd, cb_schd : SchedType; + VARIABLE ai_schd, bi_schd, ci_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalXNOR3 ( a, b, c, ResultMap ); + WAIT ON a, b, c; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( ab_schd, InitialEdge(a), tpd_a_q ); + InvPath ( ai_schd, InitialEdge(a), tpd_a_q ); + BufPath ( bb_schd, InitialEdge(b), tpd_b_q ); + InvPath ( bi_schd, InitialEdge(b), tpd_b_q ); + BufPath ( cb_schd, InitialEdge(c), tpd_c_q ); + InvPath ( ci_schd, InitialEdge(c), tpd_c_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( ab_schd, GetEdge(a), tpd_a_q ); + InvPath ( ai_schd, GetEdge(a), tpd_a_q ); + + BufPath ( bb_schd, GetEdge(b), tpd_b_q ); + InvPath ( bi_schd, GetEdge(b), tpd_b_q ); + + BufPath ( cb_schd, GetEdge(c), tpd_c_q ); + InvPath ( ci_schd, GetEdge(c), tpd_c_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := NOT (a XOR b XOR c); + new_schd := VitalXNOR3 ( ab_schd, ai_schd, + bb_schd, bi_schd, + cb_schd, ci_schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c; + END LOOP; + END IF; + END; + + -- ------------------------------------------------------------------------ + -- Commonly used 4-bit Logical gates. + -- ------------------------------------------------------------------------ + PROCEDURE VitalAND4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c, d : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd, d_Schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01) + AND (tpd_d_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalAND4 ( a, b, c, d, ResultMap ); + WAIT ON a, b, c, d; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( a_schd, InitialEdge(a), tpd_a_q ); + BufPath ( b_schd, InitialEdge(b), tpd_b_q ); + BufPath ( c_schd, InitialEdge(c), tpd_c_q ); + BufPath ( d_Schd, InitialEdge(d), tpd_d_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( a_schd, GetEdge(a), tpd_a_q ); + BufPath ( b_schd, GetEdge(b), tpd_b_q ); + BufPath ( c_schd, GetEdge(c), tpd_c_q ); + BufPath ( d_Schd, GetEdge(d), tpd_d_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a AND b AND c AND d; + new_schd := a_schd AND b_schd AND c_schd AND d_Schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c, d; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalOR4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c, d : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd, d_Schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01) + AND (tpd_d_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalOR4 ( a, b, c, d, ResultMap ); + WAIT ON a, b, c, d; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( a_schd, InitialEdge(a), tpd_a_q ); + BufPath ( b_schd, InitialEdge(b), tpd_b_q ); + BufPath ( c_schd, InitialEdge(c), tpd_c_q ); + BufPath ( d_Schd, InitialEdge(d), tpd_d_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( a_schd, GetEdge(a), tpd_a_q ); + BufPath ( b_schd, GetEdge(b), tpd_b_q ); + BufPath ( c_schd, GetEdge(c), tpd_c_q ); + BufPath ( d_Schd, GetEdge(d), tpd_d_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a OR b OR c OR d; + new_schd := a_schd OR b_schd OR c_schd OR d_Schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c, d; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNAND4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c, d : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd, d_Schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01) + AND (tpd_d_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalNAND4 ( a, b, c, d, ResultMap ); + WAIT ON a, b, c, d; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( a_schd, InitialEdge(a), tpd_a_q ); + InvPath ( b_schd, InitialEdge(b), tpd_b_q ); + InvPath ( c_schd, InitialEdge(c), tpd_c_q ); + InvPath ( d_Schd, InitialEdge(d), tpd_d_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( a_schd, GetEdge(a), tpd_a_q ); + InvPath ( b_schd, GetEdge(b), tpd_b_q ); + InvPath ( c_schd, GetEdge(c), tpd_c_q ); + InvPath ( d_Schd, GetEdge(d), tpd_d_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := (a AND b) NAND (c AND d); + new_schd := (a_schd AND b_schd) NAND (c_schd AND d_Schd); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c, d; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalNOR4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c, d : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE a_schd, b_schd, c_schd, d_Schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01) + AND (tpd_d_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalNOR4 ( a, b, c, d, ResultMap ); + WAIT ON a, b, c, d; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( a_schd, InitialEdge(a), tpd_a_q ); + InvPath ( b_schd, InitialEdge(b), tpd_b_q ); + InvPath ( c_schd, InitialEdge(c), tpd_c_q ); + InvPath ( d_Schd, InitialEdge(d), tpd_d_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( a_schd, GetEdge(a), tpd_a_q ); + InvPath ( b_schd, GetEdge(b), tpd_b_q ); + InvPath ( c_schd, GetEdge(c), tpd_c_q ); + InvPath ( d_Schd, GetEdge(d), tpd_d_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := (a OR b) NOR (c OR d); + new_schd := (a_schd OR b_schd) NOR (c_schd OR d_Schd); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c, d; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalXOR4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c, d : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE ab_schd, bb_schd, cb_schd, DB_Schd : SchedType; + VARIABLE ai_schd, bi_schd, ci_schd, di_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01) + AND (tpd_d_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalXOR4 ( a, b, c, d, ResultMap ); + WAIT ON a, b, c, d; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( ab_schd, InitialEdge(a), tpd_a_q ); + InvPath ( ai_schd, InitialEdge(a), tpd_a_q ); + + BufPath ( bb_schd, InitialEdge(b), tpd_b_q ); + InvPath ( bi_schd, InitialEdge(b), tpd_b_q ); + + BufPath ( cb_schd, InitialEdge(c), tpd_c_q ); + InvPath ( ci_schd, InitialEdge(c), tpd_c_q ); + + BufPath ( DB_Schd, InitialEdge(d), tpd_d_q ); + InvPath ( di_schd, InitialEdge(d), tpd_d_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( ab_schd, GetEdge(a), tpd_a_q ); + InvPath ( ai_schd, GetEdge(a), tpd_a_q ); + + BufPath ( bb_schd, GetEdge(b), tpd_b_q ); + InvPath ( bi_schd, GetEdge(b), tpd_b_q ); + + BufPath ( cb_schd, GetEdge(c), tpd_c_q ); + InvPath ( ci_schd, GetEdge(c), tpd_c_q ); + + BufPath ( DB_Schd, GetEdge(d), tpd_d_q ); + InvPath ( di_schd, GetEdge(d), tpd_d_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := a XOR b XOR c XOR d; + new_schd := VitalXOR4 ( ab_schd,ai_schd, bb_schd,bi_schd, + cb_schd,ci_schd, DB_Schd,di_schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c, d; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalXNOR4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL a, b, c, d : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_b_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_c_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE ab_schd, bb_schd, cb_schd, DB_Schd : SchedType; + VARIABLE ai_schd, bi_schd, ci_schd, di_schd : SchedType; + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_a_q = VitalZeroDelay01) + AND (tpd_b_q = VitalZeroDelay01) + AND (tpd_c_q = VitalZeroDelay01) + AND (tpd_d_q = VitalZeroDelay01)) THEN + LOOP + q <= VitalXNOR4 ( a, b, c, d, ResultMap ); + WAIT ON a, b, c, d; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( ab_schd, InitialEdge(a), tpd_a_q ); + InvPath ( ai_schd, InitialEdge(a), tpd_a_q ); + + BufPath ( bb_schd, InitialEdge(b), tpd_b_q ); + InvPath ( bi_schd, InitialEdge(b), tpd_b_q ); + + BufPath ( cb_schd, InitialEdge(c), tpd_c_q ); + InvPath ( ci_schd, InitialEdge(c), tpd_c_q ); + + BufPath ( DB_Schd, InitialEdge(d), tpd_d_q ); + InvPath ( di_schd, InitialEdge(d), tpd_d_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( ab_schd, GetEdge(a), tpd_a_q ); + InvPath ( ai_schd, GetEdge(a), tpd_a_q ); + + BufPath ( bb_schd, GetEdge(b), tpd_b_q ); + InvPath ( bi_schd, GetEdge(b), tpd_b_q ); + + BufPath ( cb_schd, GetEdge(c), tpd_c_q ); + InvPath ( ci_schd, GetEdge(c), tpd_c_q ); + + BufPath ( DB_Schd, GetEdge(d), tpd_d_q ); + InvPath ( di_schd, GetEdge(d), tpd_d_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := NOT (a XOR b XOR c XOR d); + new_schd := VitalXNOR4 ( ab_schd,ai_schd, bb_schd,bi_schd, + cb_schd,ci_schd, DB_Schd,di_schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON a, b, c, d; + END LOOP; + END IF; + END; + + -- ------------------------------------------------------------------------ + -- Buffers + -- BUF ....... standard non-inverting buffer + -- BUFIF0 ....... non-inverting buffer Data passes thru if (Enable = '0') + -- BUFIF1 ....... non-inverting buffer Data passes thru if (Enable = '1') + -- ------------------------------------------------------------------------ + PROCEDURE VitalBUF ( + SIGNAL q : OUT std_ulogic; + SIGNAL a : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF (tpd_a_q = VitalZeroDelay01) THEN + LOOP + q <= ResultMap(To_UX01(a)); + WAIT ON a; + END LOOP; + + ELSE + LOOP + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := To_UX01(a); -- convert to forcing strengths + CASE EdgeType'(GetEdge(a)) IS + WHEN '1'|'/'|'R'|'r' => Dly := tpd_a_q(tr01); + WHEN '0'|'\'|'F'|'f' => Dly := tpd_a_q(tr10); + WHEN OTHERS => Dly := Minimum (tpd_a_q(tr01), tpd_a_q(tr10)); + END CASE; + + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode ); + + WAIT ON a; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalBUFIF1 ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_ulogic; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_enable_q : IN VitalDelayType01Z := VitalDefDelay01Z; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) IS + VARIABLE NewValue : UX01Z; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE d_Schd, e1_Schd, e0_Schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_data_q = VitalZeroDelay01 ) + AND (tpd_enable_q = VitalZeroDelay01Z)) THEN + LOOP + q <= VitalBUFIF1( Data, Enable, ResultMap ); + WAIT ON Data, Enable; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( d_Schd, InitialEdge(Data), tpd_data_q ); + BufEnab ( e1_Schd, e0_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( d_Schd, GetEdge(Data), tpd_data_q ); + BufEnab ( e1_Schd, e0_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := VitalBUFIF1( Data, Enable ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), + d_Schd, e1_Schd, e0_Schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalBUFIF0 ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_ulogic; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_enable_q : IN VitalDelayType01Z := VitalDefDelay01Z; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) IS + VARIABLE NewValue : UX01Z; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE d_Schd, e1_Schd, e0_Schd : SchedType; + VARIABLE ne1_schd, ne0_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_data_q = VitalZeroDelay01 ) + AND (tpd_enable_q = VitalZeroDelay01Z)) THEN + LOOP + q <= VitalBUFIF0( Data, Enable, ResultMap ); + WAIT ON Data, Enable; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( d_Schd, InitialEdge(Data), tpd_data_q ); + InvEnab ( e1_Schd, e0_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( d_Schd, GetEdge(Data), tpd_data_q ); + InvEnab ( e1_Schd, e0_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := VitalBUFIF0( Data, Enable ); + ne1_schd := NOT e1_Schd; + ne0_schd := NOT e0_Schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), + d_Schd, ne1_schd, ne0_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; + END; + + PROCEDURE VitalIDENT ( + SIGNAL q : OUT std_ulogic; + SIGNAL a : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01Z := VitalDefDelay01Z; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) IS + SUBTYPE v2 IS std_logic_vector(0 TO 1); + VARIABLE NewValue : UX01Z; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF (tpd_a_q = VitalZeroDelay01Z) THEN + LOOP + q <= ResultMap(To_UX01Z(a)); + WAIT ON a; + END LOOP; + + ELSE + LOOP + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + CASE v2'(To_X01Z(NewValue) & To_X01Z(a)) IS + WHEN "00" => Dly := tpd_a_q(tr10); + WHEN "01" => Dly := tpd_a_q(tr01); + WHEN "0Z" => Dly := tpd_a_q(tr0z); + WHEN "0X" => Dly := tpd_a_q(tr01); + WHEN "10" => Dly := tpd_a_q(tr10); + WHEN "11" => Dly := tpd_a_q(tr01); + WHEN "1Z" => Dly := tpd_a_q(tr1z); + WHEN "1X" => Dly := tpd_a_q(tr10); + WHEN "Z0" => Dly := tpd_a_q(trz0); + WHEN "Z1" => Dly := tpd_a_q(trz1); + WHEN "ZZ" => Dly := 0 ns; + WHEN "ZX" => Dly := Minimum (tpd_a_q(trz1), tpd_a_q(trz0)); + WHEN "X0" => Dly := tpd_a_q(tr10); + WHEN "X1" => Dly := tpd_a_q(tr01); + WHEN "XZ" => Dly := Minimum (tpd_a_q(tr0z), tpd_a_q(tr1z)); + WHEN OTHERS => Dly := Minimum (tpd_a_q(tr01), tpd_a_q(tr10)); + END CASE; + NewValue := To_UX01Z(a); + + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode ); + + WAIT ON a; + END LOOP; + END IF; + END; + + -- ------------------------------------------------------------------------ + -- Invertors + -- INV ......... standard inverting buffer + -- INVIF0 ......... inverting buffer Data passes thru if (Enable = '0') + -- INVIF1 ......... inverting buffer Data passes thru if (Enable = '1') + -- ------------------------------------------------------------------------ + PROCEDURE VitalINV ( + SIGNAL q : OUT std_ulogic; + SIGNAL a : IN std_ulogic ; + CONSTANT tpd_a_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + IF (tpd_a_q = VitalZeroDelay01) THEN + LOOP + q <= ResultMap(NOT a); + WAIT ON a; + END LOOP; + + ELSE + LOOP + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := NOT a; + CASE EdgeType'(GetEdge(a)) IS + WHEN '1'|'/'|'R'|'r' => Dly := tpd_a_q(tr10); + WHEN '0'|'\'|'F'|'f' => Dly := tpd_a_q(tr01); + WHEN OTHERS => Dly := Minimum (tpd_a_q(tr01), tpd_a_q(tr10)); + END CASE; + + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode ); + + WAIT ON a; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalINVIF1 ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_ulogic; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_enable_q : IN VitalDelayType01Z := VitalDefDelay01Z; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) IS + VARIABLE NewValue : UX01Z; + VARIABLE new_schd : SchedType; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE d_Schd, e1_Schd, e0_Schd : SchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_data_q = VitalZeroDelay01 ) + AND (tpd_enable_q = VitalZeroDelay01Z)) THEN + LOOP + q <= VitalINVIF1( Data, Enable, ResultMap ); + WAIT ON Data, Enable; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( d_Schd, InitialEdge(Data), tpd_data_q ); + BufEnab ( e1_Schd, e0_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( d_Schd, GetEdge(Data), tpd_data_q ); + BufEnab ( e1_Schd, e0_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := VitalINVIF1( Data, Enable ); + new_schd := NOT d_Schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), + new_schd, e1_Schd, e0_Schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalINVIF0 ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_ulogic; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_enable_q : IN VitalDelayType01Z := VitalDefDelay01Z; + CONSTANT ResultMap : IN VitalResultZMapType + := VitalDefaultResultZMap + ) IS + VARIABLE NewValue : UX01Z; + VARIABLE new_schd : SchedType; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE d_Schd, e1_Schd, e0_Schd : SchedType; + VARIABLE ne1_schd, ne0_schd : SchedType := DefSchedType; + VARIABLE Dly, Glch : TIME; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_data_q = VitalZeroDelay01 ) + AND (tpd_enable_q = VitalZeroDelay01Z)) THEN + LOOP + q <= VitalINVIF0( Data, Enable, ResultMap ); + WAIT ON Data, Enable; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + InvPath ( d_Schd, InitialEdge(Data), tpd_data_q ); + InvEnab ( e1_Schd, e0_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + InvPath ( d_Schd, GetEdge(Data), tpd_data_q ); + InvEnab ( e1_Schd, e0_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delay + -- ------------------------------------ + NewValue := VitalINVIF0( Data, Enable ); + ne1_schd := NOT e1_Schd; + ne0_schd := NOT e0_Schd; + new_schd := NOT d_Schd; + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), + new_schd, ne1_schd, ne0_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; + END; + + -- ------------------------------------------------------------------------ + -- Multiplexor + -- MUX .......... result := data(dselect) + -- MUX2 .......... 2-input mux; result := data0 when (dselect = '0'), + -- data1 when (dselect = '1'), + -- 'X' when (dselect = 'X') and (data0 /= data1) + -- MUX4 .......... 4-input mux; result := data(dselect) + -- MUX8 .......... 8-input mux; result := data(dselect) + -- ------------------------------------------------------------------------ + PROCEDURE VitalMUX2 ( + SIGNAL q : OUT std_ulogic; + SIGNAL d1, d0 : IN std_ulogic; + SIGNAL dSel : IN std_ulogic; + CONSTANT tpd_d1_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_d0_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_dsel_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + VARIABLE d1_Schd, d0_Schd : SchedType; + VARIABLE dSel_bSchd, dSel_iSchd : SchedType; + VARIABLE d1_Edge, d0_Edge, dSel_Edge : EdgeType; + BEGIN + + -- ------------------------------------------------------------------------ + -- For ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF ( (tpd_d1_q = VitalZeroDelay01) + AND (tpd_d0_q = VitalZeroDelay01) + AND (tpd_dsel_q = VitalZeroDelay01) ) THEN + LOOP + q <= VitalMUX2 ( d1, d0, dSel, ResultMap ); + WAIT ON d1, d0, dSel; + END LOOP; + + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( d1_Schd, InitialEdge(d1), tpd_d1_q ); + BufPath ( d0_Schd, InitialEdge(d0), tpd_d0_q ); + BufPath ( dSel_bSchd, InitialEdge(dSel), tpd_dsel_q ); + InvPath ( dSel_iSchd, InitialEdge(dSel), tpd_dsel_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( d1_Schd, GetEdge(d1), tpd_d1_q ); + BufPath ( d0_Schd, GetEdge(d0), tpd_d0_q ); + BufPath ( dSel_bSchd, GetEdge(dSel), tpd_dsel_q ); + InvPath ( dSel_iSchd, GetEdge(dSel), tpd_dsel_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalMUX2 ( d1, d0, dSel ); + new_schd := VitalMUX2 ( d1_Schd, d0_Schd, dSel_bSchd, dSel_iSchd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON d1, d0, dSel; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalMUX4 ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector4; + SIGNAL dSel : IN std_logic_vector2; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT tpd_dsel_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE LastdSel : std_logic_vector(dSel'RANGE) := (OTHERS=>'U'); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + VARIABLE Data_Schd : SchedArray4; + VARIABLE Data_Edge : EdgeArray4; + VARIABLE dSel_Edge : EdgeArray2; + VARIABLE dSel_bSchd : SchedArray2; + VARIABLE dSel_iSchd : SchedArray2; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + ALIAS Atpd_dsel_q : VitalDelayArrayType01(dSel'RANGE) IS tpd_dsel_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN dSel'RANGE LOOP + IF (Atpd_dsel_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + + IF (AllZeroDelay) THEN LOOP + q <= VitalMUX(Data, dSel, ResultMap); + WAIT ON Data, dSel; + END LOOP; + END IF; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + FOR n IN dSel'RANGE LOOP + BufPath ( dSel_bSchd(n), InitialEdge(dSel(n)), Atpd_dsel_q(n) ); + InvPath ( dSel_iSchd(n), InitialEdge(dSel(n)), Atpd_dsel_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + GetEdge ( dSel, LastdSel, dSel_Edge ); + BufPath ( dSel_bSchd, dSel_Edge, Atpd_dsel_q ); + InvPath ( dSel_iSchd, dSel_Edge, Atpd_dsel_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalMUX4 ( Data, dSel ); + new_schd := VitalMUX4 ( Data_Schd, dSel_bSchd, dSel_iSchd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, dSel; + END LOOP; + END IF; --SN + END; + + PROCEDURE VitalMUX8 ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector8; + SIGNAL dSel : IN std_logic_vector3; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT tpd_dsel_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE LastdSel : std_logic_vector(dSel'RANGE) := (OTHERS=>'U'); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + VARIABLE Data_Schd : SchedArray8; + VARIABLE Data_Edge : EdgeArray8; + VARIABLE dSel_Edge : EdgeArray3; + VARIABLE dSel_bSchd : SchedArray3; + VARIABLE dSel_iSchd : SchedArray3; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + ALIAS Atpd_dsel_q : VitalDelayArrayType01(dSel'RANGE) IS tpd_dsel_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN dSel'RANGE LOOP + IF (Atpd_dsel_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + + IF (AllZeroDelay) THEN LOOP + q <= VitalMUX(Data, dSel, ResultMap); + WAIT ON Data, dSel; + END LOOP; + END IF; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + FOR n IN dSel'RANGE LOOP + BufPath ( dSel_bSchd(n), InitialEdge(dSel(n)), Atpd_dsel_q(n) ); + InvPath ( dSel_iSchd(n), InitialEdge(dSel(n)), Atpd_dsel_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + GetEdge ( dSel, LastdSel, dSel_Edge ); + BufPath ( dSel_bSchd, dSel_Edge, Atpd_dsel_q ); + InvPath ( dSel_iSchd, dSel_Edge, Atpd_dsel_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalMUX8 ( Data, dSel ); + new_schd := VitalMUX8 ( Data_Schd, dSel_bSchd, dSel_iSchd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, dSel; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalMUX ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector; + SIGNAL dSel : IN std_logic_vector; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT tpd_dsel_q : IN VitalDelayArrayType01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE LastdSel : std_logic_vector(dSel'RANGE) := (OTHERS=>'U'); + VARIABLE NewValue : UX01; + VARIABLE Glitch_Data : GlitchDataType; + VARIABLE new_schd : SchedType; + VARIABLE Dly, Glch : TIME; + VARIABLE Data_Schd : SchedArray(Data'RANGE); + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE dSel_Edge : EdgeArray(dSel'RANGE); + VARIABLE dSel_bSchd : SchedArray(dSel'RANGE); + VARIABLE dSel_iSchd : SchedArray(dSel'RANGE); + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + ALIAS Atpd_dsel_q : VitalDelayArrayType01(dSel'RANGE) IS tpd_dsel_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + FOR i IN dSel'RANGE LOOP + IF (Atpd_dsel_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + IF (AllZeroDelay) THEN + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + + IF (AllZeroDelay) THEN LOOP + q <= VitalMUX(Data, dSel, ResultMap); + WAIT ON Data, dSel; + END LOOP; + END IF; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_Schd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + FOR n IN dSel'RANGE LOOP + BufPath ( dSel_bSchd(n), InitialEdge(dSel(n)), Atpd_dsel_q(n) ); + InvPath ( dSel_iSchd(n), InitialEdge(dSel(n)), Atpd_dsel_q(n) ); + END LOOP; + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_Schd, Data_Edge, Atpd_data_q ); + + GetEdge ( dSel, LastdSel, dSel_Edge ); + BufPath ( dSel_bSchd, dSel_Edge, Atpd_dsel_q ); + InvPath ( dSel_iSchd, dSel_Edge, Atpd_dsel_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalMUX ( Data, dSel ); + new_schd := VitalMUX ( Data_Schd, dSel_bSchd, dSel_iSchd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, ResultMap(NewValue), Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, dSel; + END LOOP; + END IF; --SN + END; + + -- ------------------------------------------------------------------------ + -- Decoder + -- General Algorithm : + -- (a) Result(...) := '0' when (enable = '0') + -- (b) Result(data) := '1'; all other subelements = '0' + -- ... Result array is decending (n-1 downto 0) + -- + -- DECODERn .......... n:2**n decoder + -- Caution: If 'ResultMap' defines other than strength mapping, the + -- delay selection is not defined. + -- ------------------------------------------------------------------------ + PROCEDURE VitalDECODER2 ( + SIGNAL q : OUT std_logic_vector2; + SIGNAL Data : IN std_ulogic; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT tpd_enable_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE NewValue : std_logic_vector2; + VARIABLE Glitch_Data : GlitchArray2; + VARIABLE new_schd : SchedArray2; + VARIABLE Dly, Glch : TimeArray2; + VARIABLE Enable_Schd : SchedType := DefSchedType; + VARIABLE Data_BSchd, Data_ISchd : SchedType; + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF (tpd_enable_q = VitalZeroDelay01) AND (tpd_data_q = VitalZeroDelay01) THEN + LOOP + q <= VitalDECODER2(Data, Enable, ResultMap); + WAIT ON Data, Enable; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + BufPath ( Data_BSchd, InitialEdge(Data), tpd_data_q ); + InvPath ( Data_ISchd, InitialEdge(Data), tpd_data_q ); + BufPath ( Enable_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + BufPath ( Data_BSchd, GetEdge(Data), tpd_data_q ); + InvPath ( Data_ISchd, GetEdge(Data), tpd_data_q ); + + BufPath ( Enable_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalDECODER2 ( Data, Enable, ResultMap ); + new_schd := VitalDECODER2 ( Data_BSchd, Data_ISchd, Enable_Schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, NewValue, Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; -- SN + END; +-- + PROCEDURE VitalDECODER4 ( + SIGNAL q : OUT std_logic_vector4; + SIGNAL Data : IN std_logic_vector2; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT tpd_enable_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE NewValue : std_logic_vector4; + VARIABLE Glitch_Data : GlitchArray4; + VARIABLE new_schd : SchedArray4; + VARIABLE Dly, Glch : TimeArray4; + VARIABLE Enable_Schd : SchedType; + VARIABLE Enable_Edge : EdgeType; + VARIABLE Data_Edge : EdgeArray2; + VARIABLE Data_BSchd, Data_ISchd : SchedArray2; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF (tpd_enable_q /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + ELSE + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + END IF; + IF (AllZeroDelay) THEN LOOP + q <= VitalDECODER4(Data, Enable, ResultMap); + WAIT ON Data, Enable; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_BSchd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + InvPath ( Data_ISchd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + BufPath ( Enable_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_BSchd, Data_Edge, Atpd_data_q ); + InvPath ( Data_ISchd, Data_Edge, Atpd_data_q ); + + BufPath ( Enable_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalDECODER4 ( Data, Enable, ResultMap ); + new_schd := VitalDECODER4 ( Data_BSchd, Data_ISchd, Enable_Schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, NewValue, Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; + END; +-- + PROCEDURE VitalDECODER8 ( + SIGNAL q : OUT std_logic_vector8; + SIGNAL Data : IN std_logic_vector3; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT tpd_enable_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE NewValue : std_logic_vector8; + VARIABLE Glitch_Data : GlitchArray8; + VARIABLE new_schd : SchedArray8; + VARIABLE Dly, Glch : TimeArray8; + VARIABLE Enable_Schd : SchedType; + VARIABLE Enable_Edge : EdgeType; + VARIABLE Data_Edge : EdgeArray3; + VARIABLE Data_BSchd, Data_ISchd : SchedArray3; + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; --SN + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF (tpd_enable_q /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + ELSE + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + END IF; + IF (AllZeroDelay) THEN LOOP + q <= VitalDECODER(Data, Enable, ResultMap); + WAIT ON Data, Enable; + END LOOP; + ELSE + + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_BSchd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + InvPath ( Data_ISchd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + BufPath ( Enable_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_BSchd, Data_Edge, Atpd_data_q ); + InvPath ( Data_ISchd, Data_Edge, Atpd_data_q ); + + BufPath ( Enable_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalDECODER8 ( Data, Enable, ResultMap ); + new_schd := VitalDECODER8 ( Data_BSchd, Data_ISchd, Enable_Schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, NewValue, Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; --SN + END; +-- + PROCEDURE VitalDECODER ( + SIGNAL q : OUT std_logic_vector; + SIGNAL Data : IN std_logic_vector; + SIGNAL Enable : IN std_ulogic; + CONSTANT tpd_data_q : IN VitalDelayArrayType01; + CONSTANT tpd_enable_q : IN VitalDelayType01 := VitalDefDelay01; + CONSTANT ResultMap : IN VitalResultMapType + := VitalDefaultResultMap + ) IS + VARIABLE LastData : std_logic_vector(Data'RANGE) := (OTHERS=>'U'); + VARIABLE NewValue : std_logic_vector(q'RANGE); + VARIABLE Glitch_Data : GlitchDataArrayType(q'RANGE); + VARIABLE new_schd : SchedArray(q'RANGE); + VARIABLE Dly, Glch : VitalTimeArray(q'RANGE); + VARIABLE Enable_Schd : SchedType; + VARIABLE Enable_Edge : EdgeType; + VARIABLE Data_Edge : EdgeArray(Data'RANGE); + VARIABLE Data_BSchd, Data_ISchd : SchedArray(Data'RANGE); + ALIAS Atpd_data_q : VitalDelayArrayType01(Data'RANGE) IS tpd_data_q; + VARIABLE AllZeroDelay : BOOLEAN := TRUE; + BEGIN + -- ------------------------------------------------------------------------ + -- Check if ALL zero delay paths, use simple model + -- ( No delay selection, glitch detection required ) + -- ------------------------------------------------------------------------ + IF (tpd_enable_q /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + ELSE + FOR i IN Data'RANGE LOOP + IF (Atpd_data_q(i) /= VitalZeroDelay01) THEN + AllZeroDelay := FALSE; + EXIT; + END IF; + END LOOP; + END IF; + IF (AllZeroDelay) THEN LOOP + q <= VitalDECODER(Data, Enable, ResultMap); + WAIT ON Data, Enable; + END LOOP; + ELSE + -- -------------------------------------- + -- Initialize delay schedules + -- -------------------------------------- + FOR n IN Data'RANGE LOOP + BufPath ( Data_BSchd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + InvPath ( Data_ISchd(n), InitialEdge(Data(n)), Atpd_data_q(n) ); + END LOOP; + BufPath ( Enable_Schd, InitialEdge(Enable), tpd_enable_q ); + + LOOP + -- -------------------------------------- + -- Process input signals + -- get edge values + -- re-evaluate output schedules + -- -------------------------------------- + GetEdge ( Data, LastData, Data_Edge ); + BufPath ( Data_BSchd, Data_Edge, Atpd_data_q ); + InvPath ( Data_ISchd, Data_Edge, Atpd_data_q ); + + BufPath ( Enable_Schd, GetEdge(Enable), tpd_enable_q ); + + -- ------------------------------------ + -- Compute function and propation delaq + -- ------------------------------------ + NewValue := VitalDECODER ( Data, Enable, ResultMap ); + new_schd := VitalDECODER ( Data_BSchd, Data_ISchd, Enable_Schd ); + + -- ------------------------------------------------------ + -- Assign Outputs + -- get delays to new value and possable glitch + -- schedule output change with On Event glitch detection + -- ------------------------------------------------------ + GetSchedDelay ( Dly, Glch, NewValue, CurValue(Glitch_Data), new_schd ); + VitalGlitchOnEvent ( q, "q", Glitch_Data, NewValue, Dly, + PrimGlitchMode, GlitchDelay=>Glch ); + + WAIT ON Data, Enable; + END LOOP; + END IF; + END; + + -- ------------------------------------------------------------------------ + FUNCTION VitalTruthTable ( + CONSTANT TruthTable : IN VitalTruthTableType; + CONSTANT DataIn : IN std_logic_vector + ) RETURN std_logic_vector IS + + CONSTANT InputSize : INTEGER := DataIn'LENGTH; + CONSTANT OutSize : INTEGER := TruthTable'LENGTH(2) - InputSize; + VARIABLE ReturnValue : std_logic_vector(OutSize - 1 DOWNTO 0) + := (OTHERS => 'X'); + VARIABLE DataInAlias : std_logic_vector(0 TO InputSize - 1) + := To_X01(DataIn); + VARIABLE Index : INTEGER; + VARIABLE Err : BOOLEAN := FALSE; + + -- This needs to be done since the TableLookup arrays must be + -- ascending starting with 0 + VARIABLE TableAlias : VitalTruthTableType(0 TO (TruthTable'LENGTH(1)-1), + 0 TO (TruthTable'LENGTH(2)-1)) + := TruthTable; + + BEGIN + -- search through each row of the truth table + IF OutSize > 0 THEN + ColLoop: + FOR i IN TableAlias'RANGE(1) LOOP + + RowLoop: -- Check each input element of the entry + FOR j IN 0 TO InputSize LOOP + + IF (j = InputSize) THEN -- This entry matches + -- Return the Result + Index := 0; + FOR k IN TruthTable'LENGTH(2) - 1 DOWNTO InputSize LOOP + TruthOutputX01Z ( TableAlias(i,k), + ReturnValue(Index), Err); + EXIT WHEN Err; + Index := Index + 1; + END LOOP; + + IF Err THEN + ReturnValue := (OTHERS => 'X'); + END IF; + RETURN ReturnValue; + END IF; + IF NOT ValidTruthTableInput(TableAlias(i,j)) THEN + VitalError ( "VitalTruthTable", ErrInpSym, + To_TruthChar(TableAlias(i,j)) ); + EXIT ColLoop; + END IF; + EXIT RowLoop WHEN NOT ( TruthTableMatch( DataInAlias(j), + TableAlias(i, j))); + END LOOP RowLoop; + END LOOP ColLoop; + + ELSE + VitalError ( "VitalTruthTable", ErrTabWidSml ); + END IF; + RETURN ReturnValue; + END VitalTruthTable; + + FUNCTION VitalTruthTable ( + CONSTANT TruthTable : IN VitalTruthTableType; + CONSTANT DataIn : IN std_logic_vector + ) RETURN std_logic IS + + CONSTANT InputSize : INTEGER := DataIn'LENGTH; + CONSTANT OutSize : INTEGER := TruthTable'LENGTH(2) - InputSize; + VARIABLE TempResult : std_logic_vector(OutSize - 1 DOWNTO 0) + := (OTHERS => 'X'); + BEGIN + IF (OutSize > 0) THEN + TempResult := VitalTruthTable(TruthTable, DataIn); + IF ( 1 > OutSize) THEN + VitalError ( "VitalTruthTable", ErrTabResSml ); + ELSIF ( 1 < OutSize) THEN + VitalError ( "VitalTruthTable", ErrTabResLrg ); + END IF; + RETURN (TempResult(0)); + ELSE + VitalError ( "VitalTruthTable", ErrTabWidSml ); + RETURN 'X'; + END IF; + END VitalTruthTable; + + PROCEDURE VitalTruthTable ( + SIGNAL Result : OUT std_logic_vector; + CONSTANT TruthTable : IN VitalTruthTableType; + SIGNAL DataIn : IN std_logic_vector -- IR#236 + ) IS + CONSTANT ResLeng : INTEGER := Result'LENGTH; + CONSTANT ActResLen : INTEGER := TruthTable'LENGTH(2) - DataIn'LENGTH; + CONSTANT FinalResLen : INTEGER := Minimum(ActResLen, ResLeng); + VARIABLE TempResult : std_logic_vector(ActResLen - 1 DOWNTO 0) + := (OTHERS => 'X'); + + BEGIN + TempResult := VitalTruthTable(TruthTable, DataIn); + + IF (ResLeng > ActResLen) THEN + VitalError ( "VitalTruthTable", ErrTabResSml ); + ELSIF (ResLeng < ActResLen) THEN + VitalError ( "VitalTruthTable", ErrTabResLrg ); + END IF; + TempResult(FinalResLen-1 DOWNTO 0) := TempResult(FinalResLen-1 DOWNTO 0); + Result <= TempResult; + + END VitalTruthTable; + + PROCEDURE VitalTruthTable ( + SIGNAL Result : OUT std_logic; + CONSTANT TruthTable : IN VitalTruthTableType; + SIGNAL DataIn : IN std_logic_vector -- IR#236 + ) IS + + CONSTANT ActResLen : INTEGER := TruthTable'LENGTH(2) - DataIn'LENGTH; + VARIABLE TempResult : std_logic_vector(ActResLen - 1 DOWNTO 0) + := (OTHERS => 'X'); + + BEGIN + TempResult := VitalTruthTable(TruthTable, DataIn); + + IF ( 1 > ActResLen) THEN + VitalError ( "VitalTruthTable", ErrTabResSml ); + ELSIF ( 1 < ActResLen) THEN + VitalError ( "VitalTruthTable", ErrTabResLrg ); + END IF; + IF (ActResLen > 0) THEN + Result <= TempResult(0); + END IF; + + END VitalTruthTable; + + -- ------------------------------------------------------------------------ + PROCEDURE VitalStateTable ( + VARIABLE Result : INOUT std_logic_vector; + VARIABLE PreviousDataIn : INOUT std_logic_vector; + CONSTANT StateTable : IN VitalStateTableType; + CONSTANT DataIn : IN std_logic_vector; + CONSTANT NumStates : IN NATURAL + ) IS + + CONSTANT InputSize : INTEGER := DataIn'LENGTH; + CONSTANT OutSize : INTEGER + := StateTable'LENGTH(2) - InputSize - NumStates; + CONSTANT ResLeng : INTEGER := Result'LENGTH; + VARIABLE DataInAlias : std_logic_vector(0 TO DataIn'LENGTH-1) + := To_X01(DataIn); + VARIABLE PrevDataAlias : std_logic_vector(0 TO PreviousDataIn'LENGTH-1) + := To_X01(PreviousDataIn); + VARIABLE ResultAlias : std_logic_vector(0 TO ResLeng-1) + := To_X01(Result); + VARIABLE ExpResult : std_logic_vector(0 TO OutSize-1); + + BEGIN + IF (PreviousDataIn'LENGTH < DataIn'LENGTH) THEN + VitalError ( "VitalStateTable", ErrVctLng, "PreviousDataIn<DataIn"); + + ResultAlias := (OTHERS => 'X'); + Result := ResultAlias; + + ELSIF (OutSize <= 0) THEN + VitalError ( "VitalStateTable", ErrTabWidSml ); + + ResultAlias := (OTHERS => 'X'); + Result := ResultAlias; + + ELSE + IF (ResLeng > OutSize) THEN + VitalError ( "VitalStateTable", ErrTabResSml ); + ELSIF (ResLeng < OutSize) THEN + VitalError ( "VitalStateTable", ErrTabResLrg ); + END IF; + + ExpResult := StateTableLookUp ( StateTable, DataInAlias, + PrevDataAlias, NumStates, + ResultAlias); + ResultAlias := (OTHERS => 'X'); + ResultAlias ( Maximum(0, ResLeng - OutSize) TO ResLeng - 1) + := ExpResult(Maximum(0, OutSize - ResLeng) TO OutSize-1); + + Result := ResultAlias; + PrevDataAlias(0 TO InputSize - 1) := DataInAlias; + PreviousDataIn := PrevDataAlias; + + END IF; + END VitalStateTable; + + + PROCEDURE VitalStateTable ( + VARIABLE Result : INOUT std_logic; -- states + VARIABLE PreviousDataIn : INOUT std_logic_vector; -- previous inputs and states + CONSTANT StateTable : IN VitalStateTableType; -- User's StateTable data + CONSTANT DataIn : IN std_logic_vector -- Inputs + ) IS + + VARIABLE ResultAlias : std_logic_vector(0 TO 0); + BEGIN + ResultAlias(0) := Result; + VitalStateTable ( StateTable => StateTable, + DataIn => DataIn, + NumStates => 1, + Result => ResultAlias, + PreviousDataIn => PreviousDataIn + ); + Result := ResultAlias(0); + + END VitalStateTable; + + PROCEDURE VitalStateTable ( + SIGNAL Result : INOUT std_logic_vector; + CONSTANT StateTable : IN VitalStateTableType; + SIGNAL DataIn : IN std_logic_vector; + CONSTANT NumStates : IN NATURAL + ) IS + + CONSTANT InputSize : INTEGER := DataIn'LENGTH; + CONSTANT OutSize : INTEGER + := StateTable'LENGTH(2) - InputSize - NumStates; + CONSTANT ResLeng : INTEGER := Result'LENGTH; + + VARIABLE PrevData : std_logic_vector(0 TO DataIn'LENGTH-1) + := (OTHERS => 'X'); + VARIABLE DataInAlias : std_logic_vector(0 TO DataIn'LENGTH-1); + VARIABLE ResultAlias : std_logic_vector(0 TO ResLeng-1); + VARIABLE ExpResult : std_logic_vector(0 TO OutSize-1); + + BEGIN + IF (OutSize <= 0) THEN + VitalError ( "VitalStateTable", ErrTabWidSml ); + + ResultAlias := (OTHERS => 'X'); + Result <= ResultAlias; + + ELSE + IF (ResLeng > OutSize) THEN + VitalError ( "VitalStateTable", ErrTabResSml ); + ELSIF (ResLeng < OutSize) THEN + VitalError ( "VitalStateTable", ErrTabResLrg ); + END IF; + + LOOP + DataInAlias := To_X01(DataIn); + ResultAlias := To_X01(Result); + ExpResult := StateTableLookUp ( StateTable, DataInAlias, + PrevData, NumStates, + ResultAlias); + ResultAlias := (OTHERS => 'X'); + ResultAlias(Maximum(0, ResLeng - OutSize) TO ResLeng-1) + := ExpResult(Maximum(0, OutSize - ResLeng) TO OutSize-1); + + Result <= ResultAlias; + PrevData := DataInAlias; + + WAIT ON DataIn; + END LOOP; + + END IF; + + END VitalStateTable; + + PROCEDURE VitalStateTable ( + SIGNAL Result : INOUT std_logic; + CONSTANT StateTable : IN VitalStateTableType; + SIGNAL DataIn : IN std_logic_vector + ) IS + + CONSTANT InputSize : INTEGER := DataIn'LENGTH; + CONSTANT OutSize : INTEGER := StateTable'LENGTH(2) - InputSize-1; + + VARIABLE PrevData : std_logic_vector(0 TO DataIn'LENGTH-1) + := (OTHERS => 'X'); + VARIABLE DataInAlias : std_logic_vector(0 TO DataIn'LENGTH-1); + VARIABLE ResultAlias : std_logic_vector(0 TO 0); + VARIABLE ExpResult : std_logic_vector(0 TO OutSize-1); + + BEGIN + IF (OutSize <= 0) THEN + VitalError ( "VitalStateTable", ErrTabWidSml ); + + Result <= 'X'; + + ELSE + IF ( 1 > OutSize) THEN + VitalError ( "VitalStateTable", ErrTabResSml ); + ELSIF ( 1 < OutSize) THEN + VitalError ( "VitalStateTable", ErrTabResLrg ); + END IF; + + LOOP + ResultAlias(0) := To_X01(Result); + DataInAlias := To_X01(DataIn); + ExpResult := StateTableLookUp ( StateTable, DataInAlias, + PrevData, 1, ResultAlias); + + Result <= ExpResult(OutSize-1); + PrevData := DataInAlias; + + WAIT ON DataIn; + END LOOP; + END IF; + + END VitalStateTable; + + -- ------------------------------------------------------------------------ + -- std_logic resolution primitive + -- ------------------------------------------------------------------------ + PROCEDURE VitalResolve ( + SIGNAL q : OUT std_ulogic; + SIGNAL Data : IN std_logic_vector --IR236 4/2/98 + ) IS + VARIABLE uData : std_ulogic_vector(Data'RANGE); + BEGIN + FOR i IN Data'RANGE LOOP + uData(i) := Data(i); + END LOOP; + q <= resolved(uData); + END; + +END VITAL_Primitives; + |