diff options
Diffstat (limited to 'testsuite/vests/vhdl-93/billowitch/compliant/tc1348.vhd')
| -rw-r--r-- | testsuite/vests/vhdl-93/billowitch/compliant/tc1348.vhd | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/testsuite/vests/vhdl-93/billowitch/compliant/tc1348.vhd b/testsuite/vests/vhdl-93/billowitch/compliant/tc1348.vhd new file mode 100644 index 0000000..2227f81 --- /dev/null +++ b/testsuite/vests/vhdl-93/billowitch/compliant/tc1348.vhd @@ -0,0 +1,147 @@ + +-- Copyright (C) 2001 Bill Billowitch. + +-- Some of the work to develop this test suite was done with Air Force +-- support. The Air Force and Bill Billowitch assume no +-- responsibilities for this software. + +-- This file is part of VESTs (Vhdl tESTs). + +-- VESTs is free software; you can redistribute it and/or modify it +-- under the terms of the GNU General Public License as published by the +-- Free Software Foundation; either version 2 of the License, or (at +-- your option) any later version. + +-- VESTs is distributed in the hope that it will be useful, but WITHOUT +-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +-- for more details. + +-- You should have received a copy of the GNU General Public License +-- along with VESTs; if not, write to the Free Software Foundation, +-- Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + +-- --------------------------------------------------------------------- +-- +-- $Id: tc1348.vhd,v 1.2 2001-10-26 16:29:40 paw Exp $ +-- $Revision: 1.2 $ +-- +-- --------------------------------------------------------------------- + +ENTITY c08s04b01x00p07n01i01348ent IS +END c08s04b01x00p07n01i01348ent; + +ARCHITECTURE c08s04b01x00p07n01i01348arch OF c08s04b01x00p07n01i01348ent IS + + -- Local signals. + signal S : BIT := '0'; + +BEGIN + TESTING: PROCESS + -- local variables. + variable S_INITIAL : BIT; + variable ShouldBeTime : TIME; + + variable k : integer := 0; + + BEGIN + -- 0. Keep around the initial value of S. + S_INITIAL := S; + + -- 1. When no preemption necessary, verify the results. + S <= transport (not S) after 10 ns, (S) after 20 ns; + -- a. Wait for first transaction. + ShouldBeTime := NOW + 10 ns; + wait on S; + if (ShouldBeTime /= now or S /= not S_INITIAL) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + assert (S = (not S_INITIAL)); + + -- b. Wait for second transaction. + ShouldBeTime := NOW + 10 ns; + wait on S; + assert (ShouldBeTime = NOW); + assert (S = S_INITIAL); + + -- 2. Preempt a transaction which is to occur at the same time as second one. + S_INITIAL := S; + S <= transport (S) after 10 ns; + S <= transport (not S) after 10 ns; -- Should preempt first transaction. + -- a. Verify that the second transaction comes as expected. + ShouldBeTime := NOW + 10 ns; + wait on S; + if (ShouldBeTime /= now or S /= not S_INITIAL) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + assert (S = (not S_INITIAL)); + + -- b. Verify that the first transaction has been preempted. + ShouldBeTime := NOW + 10 ns; + wait on S for 10 ns; + if (ShouldBeTime /= now) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + + -- 3. Preempt a transaction which is to occur at a later time than second one. + S_INITIAL := S; + S <= transport (S) after 15 ns; + S <= transport (not S) after 10 ns; -- Should preempt first transaction. + -- a. Verify that the second transaction comes as expected. + ShouldBeTime := NOW + 10 ns; + wait on S; + if (ShouldBeTime /= now or S /= not S_INITIAL) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + assert (S = (not S_INITIAL)); + + -- b. Verify that the first transaction has been preempted. + ShouldBeTime := NOW + 10 ns; + wait on S for 10 ns; + if (ShouldBeTime /= now) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + + -- 4. Preempt multiple transactions. + S_INITIAL := S; + S <= transport (S) after 15 ns, (not S) after 30 ns; + S <= transport (not S) after 10 ns, (S) after 20 ns; + -- a. Verify that the second transactions come as expected. + ShouldBeTime := NOW + 10 ns; + wait on S; + if (ShouldBeTime /= now or S /= not S_INITIAL) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + assert (S = (not S_INITIAL)); + ShouldBeTime := NOW + 10 ns; + wait on S; + if (ShouldBeTime /= now or S /= S_INITIAL) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + assert (S = S_INITIAL); + + -- b. Verify that the first transactions have been preempted. + ShouldBeTime := NOW + 40 ns; + wait on S for 40 ns; + if (ShouldBeTime /= now) then + k := 1; + end if; + assert (ShouldBeTime = NOW); + + assert NOT( k=0 ) + report "***PASSED TEST: c08s04b01x00p07n01i01348" + severity NOTE; + assert ( k=0 ) + report "***FAILED TEST: c08s04b01x00p07n01i01348 - The sequence of transactions is used to update the projected output waveform representing the current and future values of the driver associated with the signal assignment statement." + severity ERROR; + wait; + END PROCESS TESTING; + +END c08s04b01x00p07n01i01348arch; |