diff options
Diffstat (limited to 'libraries/openieee/math_real.vhdl')
| -rw-r--r-- | libraries/openieee/math_real.vhdl | 96 |
1 files changed, 95 insertions, 1 deletions
diff --git a/libraries/openieee/math_real.vhdl b/libraries/openieee/math_real.vhdl index b2814f5..b8c2150 100644 --- a/libraries/openieee/math_real.vhdl +++ b/libraries/openieee/math_real.vhdl @@ -17,7 +17,31 @@ -- <http://www.gnu.org/licenses/>. package MATH_REAL is - constant math_pi : real := 3.14159_26535_89793_23846; + -- The values were computed with at least 40 digits and rounded to + -- 20 digits after the dot. They were checked with the original ieee + -- specification (log2_of_e has an extra digit from the spec). + constant math_e : real := 2.71828_18284_59045_23536; + constant math_1_over_e : real := 0.36787_94411_71442_321596; + + constant math_pi : real := 3.14159_26535_89793_23846; + constant math_2_pi : real := 6.28318_53071_79586_47693; + constant math_pi_over_2 : real := 1.57079_63267_94896_61923; + constant math_pi_over_3 : real := 1.04719_75511_96597_74615; + constant math_pi_over_4 : real := 0.78539_81633_97448_30962; + constant math_3_pi_over_2 : real := 4.71238_89803_84689_85769; + + constant math_log_of_2 : real := 0.69314_71805_59945_30942; + constant math_log_of_10 : real := 2.30258_50929_94045_68402; + constant math_log2_of_e : real := 1.44269_50408_88963_40736; + constant math_log10_of_e : real := 0.43429_44819_03251_82765; + + constant math_sqrt_2 : real := 1.41421_35623_73095_04880; + constant math_1_over_sqrt_2 : real := 0.70710_67811_86547_52440; + constant math_sqrt_pi : real := 1.77245_38509_05516_02730; + + constant math_deg_to_rad : real := 0.01745_32925_19943_29577; + constant math_rad_to_deg : real := 57.29577_95130_82320_87680; + function SIGN (X : REAL) return REAL; function CEIL (X : REAL) return REAL; @@ -32,13 +56,83 @@ package MATH_REAL is function TRUNC (X : REAL) return REAL; attribute foreign of trunc : function is "VHPIDIRECT trunc"; + function "mod" (X, Y : REAL) return REAL; + -- Contrary to fmod, the sign of the result is the sign of Y. + + function REALMAX (X, Y : REAL) return REAL; + attribute foreign of REALMAX : function is "VHPIDIRECT fmax"; + + function REALMIN (X, Y : REAL) return REAL; + attribute foreign of REALMIN : function is "VHPIDIRECT fmin"; + procedure UNIFORM (SEED1, SEED2 : inout POSITIVE; X : out REAL); -- Algorithm from: Pierre L'Ecuyer, CACM June 1988 Volume 31 Number 6 -- page 747 figure 3. + function SQRT (X : REAL) return REAL; + attribute foreign of SQRT : function is "VHPIDIRECT sqrt"; + + function CBRT (X : REAL) return REAL; + attribute foreign of CBRT : function is "VHPIDIRECT cbrt"; + + function "**" (X : INTEGER; Y : REAL) return REAL; + + function "**" (X : REAL; Y : REAL) return REAL; + attribute foreign of "**" [ REAL, REAL return REAL ]: function is + "VHPIDIRECT pow"; + + function EXP (X : REAL) return REAL; + attribute foreign of EXP : function is "VHPIDIRECT exp"; + + function LOG (X : REAL) return REAL; + attribute foreign of LOG [ REAL return REAL ] : function is "VHPIDIRECT log"; + + function LOG2 (X : REAL) return REAL; + attribute foreign of LOG2 : function is "VHPIDIRECT log2"; + + function LOG10 (X : REAL) return REAL; + attribute foreign of LOG10 : function is "VHPIDIRECT log10"; + + function LOG (X : REAL; BASE : REAL) return REAL; + function SIN (X : REAL) return REAL; attribute foreign of SIN : function is "VHPIDIRECT sin"; function COS (X : REAL) return REAL; attribute foreign of COS : function is "VHPIDIRECT cos"; + + function TAN (X : REAL) return REAL; + attribute foreign of TAN : function is "VHPIDIRECT tan"; + + function ARCSIN (X : REAL) return REAL; + attribute foreign of ARCSIN : function is "VHPIDIRECT asin"; + + function ARCCOS (X : REAL) return REAL; + attribute foreign of ARCCOS : function is "VHPIDIRECT acos"; + + function ARCTAN (Y : REAL) return REAL; + attribute foreign of ARCTAN [ REAL return REAL ]: function is + "VHPIDIRECT atan"; + + function ARCTAN (Y, X : REAL) return REAL; + attribute foreign of ARCTAN [ REAL, REAL return REAL ]: function is + "VHPIDIRECT atan2"; + + function SINH (X : REAL) return REAL; + attribute foreign of SINH : function is "VHPIDIRECT sinh"; + + function COSH (X : REAL) return REAL; + attribute foreign of COSH : function is "VHPIDIRECT cosh"; + + function TANH (X : REAL) return REAL; + attribute foreign of TANH : function is "VHPIDIRECT tanh"; + + function ARCSINH (X : REAL) return REAL; + attribute foreign of ARCSINH : function is "VHPIDIRECT asinh"; + + function ARCCOSH (X : REAL) return REAL; + attribute foreign of ARCCOSH : function is "VHPIDIRECT acosh"; + + function ARCTANH (Y : REAL) return REAL; + attribute foreign of ARCTANH : function is "VHPIDIRECT atanh"; end MATH_REAL; |