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URL https://opencores.org/ocsvn/encore/encore/trunk

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  • This comparison shows the changes necessary to convert path 
    /encore/trunk/fpmult/src
    from Rev 6 to Rev 8
    ↔ Reverse comparison
  •

Rev 6 → Rev 8

/fp_generic.vhdl
28,6 → 28,8
function fp_is_nan(fp:fp_type) return boolean;
function fp_is_signalling(fp:fp_type) return boolean;
function fp_is_quiet(fp:fp_type) return boolean;
function fp_is_positive(fp:fp_type) return boolean;
function fp_is_negative(fp:fp_type) return boolean;
 
end package;
 
68,32 → 70,42
 
function fp_is_zero(fp:fp_type) return boolean is
begin
return (fp_exp(fp)=0) and (fp_mantissa(fp)=0);
return (fp_exp(fp)=0) and (fp_mantissa(fp)(fp_mantissa_type'high-1 downto 0)=0);
end function fp_is_zero;
 
function fp_is_subnormal(fp:fp_type) return boolean is
begin
return (fp_exp(fp)=0) and (fp_mantissa(fp)/=0);
return (fp_exp(fp)=0) and (fp_mantissa(fp)(fp_mantissa_type'high-1 downto 0)/=0);
end function fp_is_subnormal;
 
function fp_is_infinite(fp:fp_type) return boolean is
begin
return (fp_exp_is_max(fp_exp(fp))) and (fp_mantissa(fp)=0);
return (fp_exp_is_max(fp_exp(fp))) and (fp_mantissa(fp)(fp_mantissa_type'high-1 downto 0)=0);
end function fp_is_infinite;
 
function fp_is_nan(fp:fp_type) return boolean is
begin
return (fp_exp_is_max(fp_exp(fp))) and (fp_mantissa(fp)/=0);
return (fp_exp_is_max(fp_exp(fp))) and (fp_mantissa(fp)(fp_mantissa_type'high-1 downto 0)/=0);
end function fp_is_nan;
 
function fp_is_signalling(fp:fp_type) return boolean is
begin
return fp_is_nan(fp) and fp_mantissa(fp)(22)='0';
return fp_is_nan(fp) and fp_mantissa(fp)(fp_mantissa_type'high-1)='0';
end function fp_is_signalling;
 
function fp_is_quiet(fp:fp_type) return boolean is
begin
return fp_is_nan(fp) and fp_mantissa(fp)(22)='1';
return fp_is_nan(fp) and fp_mantissa(fp)(fp_mantissa_type'high-1)='1';
end function fp_is_quiet;
 
function fp_is_positive(fp:fp_type) return boolean is
begin
return (fp_sign(fp)='0');
end function fp_is_positive;
 
function fp_is_negative(fp:fp_type) return boolean is
begin
return (fp_sign(fp)='1');
end function fp_is_negative;
 
end package body fp_generic;
/test_fpmult.vhdl
7,9 → 7,402
end;
 
architecture testbench of test_fpmult is
type test_condition_type is record
a:fp_type;
b:fp_type;
p:fp_type;
msg:string(1 to 43);
end record;
 
type test_condition_array_type is array(positive range <>) of test_condition_type;
 
signal clk:std_logic:='0';
signal d:fpmult_in_type;
signal q:fpmult_out_type;
 
constant number_of_stages:integer:=25;
constant clock_period:time:=20 ns;
constant pipeline_delay:time:=number_of_stages*clock_period;
 
constant plus_zero:fp_type:=x"00000000";
constant minus_zero:fp_type:=x"80000000";
 
constant plus_normal:fp_type:=x"3FB76CE1";
constant minus_normal:fp_type:=x"BFB76CE1";
 
constant plus_normal_squared:fp_type:=x"40036CD8";
constant minus_normal_squared:fp_type:=x"C0036CD8";
 
constant plus_subnormal:fp_type:=x"00051D75";
constant minus_subnormal:fp_type:=x"80051D75";
 
constant plus_infinite:fp_type:=x"7F800000";
constant minus_infinite:fp_type:=x"FF800000";
 
constant plus_qnan:fp_type:=x"7FC00000";
constant minus_qnan:fp_type:=x"FFC00000";
 
constant plus_snan:fp_type:=x"7FBFFFFF";
constant minus_snan:fp_type:=x"FFBFFFFF";
 
constant multiplier_testset:test_condition_array_type:=
(
----------------------------------------------------------------------------
-- zero * zero
----------------------------------------------------------------------------
( plus_zero, plus_zero, plus_zero, "+0 * +0 != +0 " ),
( plus_zero, minus_zero, minus_zero, "+0 * -0 != -0 " ),
( minus_zero, plus_zero, minus_zero, "-0 * +0 != -0 " ),
( minus_zero, minus_zero, plus_zero, "-0 * -0 != +0 " ),
 
----------------------------------------------------------------------------
-- zero * normal
----------------------------------------------------------------------------
( plus_zero, plus_normal, plus_zero, "+0 * +normal != +0 " ),
( plus_zero, minus_normal, minus_zero, "+0 * -normal != -0 " ),
( minus_zero, plus_normal, minus_zero, "-0 * +normal != -0 " ),
( minus_zero, minus_normal, plus_zero, "-0 * -normal != +0 " ),
 
----------------------------------------------------------------------------
-- normal * zero
----------------------------------------------------------------------------
( plus_normal, plus_zero, plus_zero, "+normal * +0 != +0 " ),
( plus_normal, minus_zero, minus_zero, "+normal * -0 != -0 " ),
( minus_normal, plus_zero, minus_zero, "-normal * +0 != -0 " ),
( minus_normal, minus_zero, plus_zero, "-normal * -0 != +0 " ),
 
----------------------------------------------------------------------------
-- zero * subnormal
----------------------------------------------------------------------------
( plus_zero, plus_subnormal, plus_zero, "+0 * +subnormal != +0 " ),
( plus_zero, minus_subnormal, minus_zero, "+0 * -subnormal != -0 " ),
( minus_zero, plus_subnormal, minus_zero, "-0 * +subnormal != -0 " ),
( minus_zero, minus_subnormal, plus_zero, "-0 * -subnormal != +0 " ),
 
----------------------------------------------------------------------------
-- subnormal * zero
----------------------------------------------------------------------------
( plus_subnormal, plus_zero, plus_zero, "+subnormal * +0 != +0 " ),
( plus_subnormal, minus_zero, minus_zero, "+subnormal * -0 != -0 " ),
( minus_subnormal, plus_zero, minus_zero, "-subnormal * +0 != -0 " ),
( minus_subnormal, minus_zero, plus_zero, "-subnormal * -0 != +0 " ),
 
----------------------------------------------------------------------------
-- zero * infinite
----------------------------------------------------------------------------
( plus_zero, plus_infinite, plus_qnan, "+0 * +infinite != +qnan " ),
( plus_zero, minus_infinite, minus_qnan, "+0 * -infinite != -qnan " ),
( minus_zero, plus_infinite, minus_qnan, "-0 * +infinite != -qnan " ),
( minus_zero, minus_infinite, plus_qnan, "-0 * -infinite != +qnan " ),
 
----------------------------------------------------------------------------
-- infinite * zero
----------------------------------------------------------------------------
( plus_infinite, plus_zero, plus_qnan, "+infinite * +0 != +qnan " ),
( plus_infinite, minus_zero, minus_qnan, "+infinite * -0 != -qnan " ),
( minus_infinite, plus_zero, minus_qnan, "-infinite * +0 != -qnan " ),
( minus_infinite, minus_zero, plus_qnan, "-infinite * -0 != +qnan " ),
 
----------------------------------------------------------------------------
-- zero * qnan
----------------------------------------------------------------------------
( plus_zero, plus_qnan, plus_qnan, "+0 * +qnan != +qnan " ),
( plus_zero, minus_qnan, minus_qnan, "+0 * -qnan != -qnan " ),
( minus_zero, plus_qnan, minus_qnan, "-0 * +qnan != -qnan " ),
( minus_zero, minus_qnan, plus_qnan, "-0 * -qnan != +qnan " ),
 
----------------------------------------------------------------------------
-- qnan * zero
----------------------------------------------------------------------------
( plus_qnan, plus_zero, plus_qnan, "+qnan * +0 != +qnan " ),
( plus_qnan, minus_zero, minus_qnan, "+qnan * -0 != -qnan " ),
( minus_qnan, plus_zero, minus_qnan, "-qnan * +0 != -qnan " ),
( minus_qnan, minus_zero, plus_qnan, "-qnan * -0 != +qnan " ),
 
----------------------------------------------------------------------------
-- zero * snan
----------------------------------------------------------------------------
( plus_zero, plus_snan, plus_qnan, "+0 * +snan != +qnan " ),
( plus_zero, minus_snan, minus_qnan, "+0 * -snan != -qnan " ),
( minus_zero, plus_snan, minus_qnan, "-0 * +snan != -qnan " ),
( minus_zero, minus_snan, plus_qnan, "-0 * -snan != +qnan " ),
 
----------------------------------------------------------------------------
-- snan * zero
----------------------------------------------------------------------------
( plus_snan, plus_zero, plus_qnan, "+snan * +0 != +qnan " ),
( plus_snan, minus_zero, minus_qnan, "+snan * -0 != -qnan " ),
( minus_snan, plus_zero, minus_qnan, "-snan * +0 != -qnan " ),
( minus_snan, minus_zero, plus_qnan, "-snan * -0 != +qnan " ),
 
----------------------------------------------------------------------------
-- normal * normal
----------------------------------------------------------------------------
( plus_normal, plus_normal, plus_normal_squared, "+normal * +normal != +normal " ),
( plus_normal, minus_normal, minus_normal_squared, "+normal * -normal != -normal " ),
( minus_normal, plus_normal, minus_normal_squared, "-normal * +normal != -normal " ),
( minus_normal, minus_normal, plus_normal_squared, "-normal * -normal != +normal " ),
 
----------------------------------------------------------------------------
-- normal * subnormal
----------------------------------------------------------------------------
( plus_normal, plus_subnormal, plus_zero, "+normal * +subnormal != +0 " ),
( plus_normal, minus_subnormal, minus_zero, "+normal * -subnormal != -0 " ),
( minus_normal, plus_subnormal, minus_zero, "-normal * +subnormal != -0 " ),
( minus_normal, minus_subnormal, plus_zero, "-normal * -subnormal != +0 " ),
 
----------------------------------------------------------------------------
-- subnormal * normal
----------------------------------------------------------------------------
( plus_subnormal, plus_normal, plus_zero, "+subnormal * +normal != +0 " ),
( plus_subnormal, minus_normal, minus_zero, "+subnormal * -normal != -0 " ),
( minus_subnormal, plus_normal, minus_zero, "-subnormal * +normal != -0 " ),
( minus_subnormal, minus_normal, plus_zero, "-subnormal * -normal != +0 " ),
 
----------------------------------------------------------------------------
-- normal * infinite
----------------------------------------------------------------------------
( plus_normal, plus_infinite, plus_infinite, "+normal * +infinite != +infinite " ),
( plus_normal, minus_infinite, minus_infinite, "+normal * -infinite != -infinite " ),
( minus_normal, plus_infinite, minus_infinite, "-normal * +infinite != -infinite " ),
( minus_normal, minus_infinite, plus_infinite, "-normal * -infinite != +infinite " ),
 
----------------------------------------------------------------------------
-- infinite * normal
----------------------------------------------------------------------------
( plus_infinite, plus_normal, plus_infinite, "+infinite * +normal != +infinite " ),
( plus_infinite, minus_normal, minus_infinite, "+infinite * -normal != -infinite " ),
( minus_infinite, plus_normal, minus_infinite, "-infinite * +normal != -infinite " ),
( minus_infinite, minus_normal, plus_infinite, "-infinite * -normal != +infinite " ),
 
----------------------------------------------------------------------------
-- normal * qnan
----------------------------------------------------------------------------
( plus_normal, plus_qnan, plus_qnan, "+normal * +qnan != +qnan " ),
( plus_normal, minus_qnan, minus_qnan, "+normal * -qnan != -qnan " ),
( minus_normal, plus_qnan, minus_qnan, "-normal * +qnan != -qnan " ),
( minus_normal, minus_qnan, plus_qnan, "-normal * -qnan != +qnan " ),
 
----------------------------------------------------------------------------
-- qnan * normal
----------------------------------------------------------------------------
( plus_qnan, plus_normal, plus_qnan, "+qnan * +normal != +qnan " ),
( plus_qnan, minus_normal, minus_qnan, "+qnan * -normal != -qnan " ),
( minus_qnan, plus_normal, minus_qnan, "-qnan * +normal != -qnan " ),
( minus_qnan, minus_normal, plus_qnan, "-qnan * -normal != +qnan " ),
 
----------------------------------------------------------------------------
-- normal * snan
----------------------------------------------------------------------------
( plus_normal, plus_snan, plus_qnan, "+normal * +snan != +qnan " ),
( plus_normal, minus_snan, minus_qnan, "+normal * -snan != -qnan " ),
( minus_normal, plus_snan, minus_qnan, "-normal * +snan != -qnan " ),
( minus_normal, minus_snan, plus_qnan, "-normal * -snan != +qnan " ),
 
----------------------------------------------------------------------------
-- snan * normal
----------------------------------------------------------------------------
( plus_snan, plus_normal, plus_qnan, "+snan * +normal != +qnan " ),
( plus_snan, minus_normal, minus_qnan, "+snan * -normal != -qnan " ),
( minus_snan, plus_normal, minus_qnan, "-snan * +normal != -qnan " ),
( minus_snan, minus_normal, plus_qnan, "-snan * -normal != +qnan " ),
 
----------------------------------------------------------------------------
-- subnormal * subnormal
----------------------------------------------------------------------------
( plus_subnormal, plus_subnormal, plus_zero, "+subnormal * +subnormal != +0 " ),
( plus_subnormal, minus_subnormal, minus_zero, "+subnormal * -subnormal != -0 " ),
( minus_subnormal, plus_subnormal, minus_zero, "-subnormal * +subnormal != -0 " ),
( minus_subnormal, minus_subnormal, plus_zero, "-subnormal * -subnormal != +0 " ),
 
----------------------------------------------------------------------------
-- subnormal * infinite
----------------------------------------------------------------------------
( plus_subnormal, plus_infinite, plus_qnan, "+subnormal * +infinite != +qnan " ),
( plus_subnormal, minus_infinite, minus_qnan, "+subnormal * -infinite != -qnan " ),
( minus_subnormal, plus_infinite, minus_qnan, "-subnormal * +infinite != -qnan " ),
( minus_subnormal, minus_infinite, plus_qnan, "-subnormal * -infinite != +qnan " ),
 
----------------------------------------------------------------------------
-- infinite * subnormal
----------------------------------------------------------------------------
( plus_infinite, plus_subnormal, plus_qnan, "+infinite * +subnormal != +qnan " ),
( plus_infinite, minus_subnormal, minus_qnan, "+infinite * -subnormal != -qnan " ),
( minus_infinite, plus_subnormal, minus_qnan, "-infinite * +subnormal != -qnan " ),
( minus_infinite, minus_subnormal, plus_qnan, "-infinite * -subnormal != +qnan " ),
 
----------------------------------------------------------------------------
-- subnormal * qnan
----------------------------------------------------------------------------
( plus_subnormal, plus_qnan, plus_qnan, "+subnormal * +qnan != +qnan " ),
( plus_subnormal, minus_qnan, minus_qnan, "+subnormal * -qnan != -qnan " ),
( minus_subnormal, plus_qnan, minus_qnan, "-subnormal * +qnan != -qnan " ),
( minus_subnormal, minus_qnan, plus_qnan, "-subnormal * -qnan != +qnan " ),
 
----------------------------------------------------------------------------
-- qnan * subnormal
----------------------------------------------------------------------------
( plus_qnan, plus_subnormal, plus_qnan, "+qnan * +subnormal != +qnan " ),
( plus_qnan, minus_subnormal, minus_qnan, "+qnan * -subnormal != -qnan " ),
( minus_qnan, plus_subnormal, minus_qnan, "-qnan * +subnormal != -qnan " ),
( minus_qnan, minus_subnormal, plus_qnan, "-qnan * -subnormal != +qnan " ),
 
----------------------------------------------------------------------------
-- subnormal * snan
----------------------------------------------------------------------------
( plus_subnormal, plus_snan, plus_qnan, "+subnormal * +snan != +qnan " ),
( plus_subnormal, minus_snan, minus_qnan, "+subnormal * -snan != -qnan " ),
( minus_subnormal, plus_snan, minus_qnan, "-subnormal * +snan != -qnan " ),
( minus_subnormal, minus_snan, plus_qnan, "-subnormal * -snan != +qnan " ),
 
----------------------------------------------------------------------------
-- snan * subnormal
----------------------------------------------------------------------------
( plus_snan, plus_subnormal, plus_qnan, "+snan * +subnormal != +qnan " ),
( plus_snan, minus_subnormal, minus_qnan, "+snan * -subnormal != -qnan " ),
( minus_snan, plus_subnormal, minus_qnan, "-snan * +subnormal != -qnan " ),
( minus_snan, minus_subnormal, plus_qnan, "-snan * -subnormal != +qnan " ),
 
----------------------------------------------------------------------------
-- infinite * infinite
----------------------------------------------------------------------------
( plus_infinite, plus_infinite, plus_infinite, "+infinite * +infinite != +infinite " ),
( plus_infinite, minus_infinite, minus_infinite, "+infinite * -infinite != -infinite " ),
( minus_infinite, plus_infinite, minus_infinite, "-infinite * +infinite != -infinite " ),
( minus_infinite, minus_infinite, plus_infinite, "-infinite * -infinite != +infinite " ),
 
----------------------------------------------------------------------------
-- infinite * qnan
----------------------------------------------------------------------------
( plus_infinite, plus_qnan, plus_qnan, "+infinite * +qnan != +qnan " ),
( plus_infinite, minus_qnan, minus_qnan, "+infinite * -qnan != -qnan " ),
( minus_infinite, plus_qnan, minus_qnan, "-infinite * +qnan != -qnan " ),
( minus_infinite, minus_qnan, plus_qnan, "-infinite * -qnan != +qnan " ),
 
----------------------------------------------------------------------------
-- qnan * infinite
----------------------------------------------------------------------------
( plus_qnan, plus_infinite, plus_qnan, "+qnan * +infinite != +qnan " ),
( plus_qnan, minus_infinite, minus_qnan, "+qnan * -infinite != -qnan " ),
( minus_qnan, plus_infinite, minus_qnan, "-qnan * +infinite != -qnan " ),
( minus_qnan, minus_infinite, plus_qnan, "-qnan * -infinite != +qnan " ),
 
----------------------------------------------------------------------------
-- infinite * snan
----------------------------------------------------------------------------
( plus_infinite, plus_snan, plus_qnan, "+infinite * +snan != +qnan " ),
( plus_infinite, minus_snan, minus_qnan, "+infinite * -snan != -qnan " ),
( minus_infinite, plus_snan, minus_qnan, "-infinite * +snan != -qnan " ),
( minus_infinite, minus_snan, plus_qnan, "-infinite * -snan != +qnan " ),
 
----------------------------------------------------------------------------
-- snan * infinite
----------------------------------------------------------------------------
( plus_snan, plus_infinite, plus_qnan, "+snan * +infinite != +qnan " ),
( plus_snan, minus_infinite, minus_qnan, "+snan * -infinite != -qnan " ),
( minus_snan, plus_infinite, minus_qnan, "-snan * +infinite != -qnan " ),
( minus_snan, minus_infinite, plus_qnan, "-snan * -infinite != +qnan " ),
 
----------------------------------------------------------------------------
-- qnan * qnan
----------------------------------------------------------------------------
( plus_qnan, plus_qnan, plus_qnan, "+qnan * +qnan != +qnan " ),
( plus_qnan, minus_qnan, minus_qnan, "+qnan * -qnan != -qnan " ),
( minus_qnan, plus_qnan, minus_qnan, "-qnan * +qnan != -qnan " ),
( minus_qnan, minus_qnan, plus_qnan, "-qnan * -qnan != +qnan " ),
 
----------------------------------------------------------------------------
-- qnan * snan
----------------------------------------------------------------------------
( plus_qnan, plus_snan, plus_qnan, "+qnan * +snan != +qnan " ),
( plus_qnan, minus_snan, minus_qnan, "+qnan * -snan != -qnan " ),
( minus_qnan, plus_snan, minus_qnan, "-qnan * +snan != -qnan " ),
( minus_qnan, minus_snan, plus_qnan, "-qnan * -snan != +qnan " ),
 
----------------------------------------------------------------------------
-- snan * qnan
----------------------------------------------------------------------------
( plus_snan, plus_qnan, plus_qnan, "+snan * +qnan != +qnan " ),
( plus_snan, minus_qnan, minus_qnan, "+snan * -qnan != -qnan " ),
( minus_snan, plus_qnan, minus_qnan, "-snan * +qnan != -qnan " ),
( minus_snan, minus_qnan, plus_qnan, "-snan * -qnan != +qnan " ),
 
----------------------------------------------------------------------------
-- snan * snan
----------------------------------------------------------------------------
( plus_snan, plus_snan, plus_qnan, "+snan * +snan != +qnan " ),
( plus_snan, minus_snan, minus_qnan, "+snan * -snan != -qnan " ),
( minus_snan, plus_snan, minus_qnan, "-snan * +snan != -qnan " ),
( minus_snan, minus_snan, plus_qnan, "-snan * -snan != +qnan " )
);
 
constant pipeline_testset:test_condition_array_type:=
(
( x"2923be84", x"e16cd6ae", x"cb177cf2", " 3.63585e-14 * -2.73056e+20 != -9.92792e+06" ),
( x"529049f1", x"f1bbe9eb", x"ff800000", " 3.09858e+11 * -1.86101e+30 != -infinite" ),
( x"b3a6db3c", x"870c3e99", x"000016da", "-7.76986e-08 * -1.05508e-34 != +subnormal" ),
( x"245e0d1c", x"06b747de", x"00000000", " 4.81497e-17 * 6.89425e-35 != +zero" ),
( x"b3124dc8", x"43bb8ba6", x"b7565d40", "-3.40640e-08 * 3.75091e+02 != -1.27771e-05" ),
( x"1f035a7d", x"0938251f", x"00000000", " 2.78152e-20 * 2.21656e-33 != +zero" ),
( x"5dd4cbfc", x"96f5453b", x"b54be0c4", " 1.91670e+18 * -3.96256e-25 != -7.59505e-07" ),
( x"130d890a", x"1cdbae32", x"00000000", " 1.78643e-27 * 1.45372e-21 != +zero" ),
( x"209a50ee", x"407836fd", x"21959f8c", " 2.61422e-19 * 3.87836e+00 != 1.01389e-18" ),
( x"124932f6", x"9e7d49dc", x"80000000", " 6.34872e-28 * -1.34090e-20 != -zero" ),
( x"ad4f14f2", x"444066d0", x"b21ba2e0", "-1.17712e-11 * 7.69606e+02 != -9.05922e-09" ),
( x"6bc430b7", x"323ba122", x"5e8fcb12", " 4.74359e+26 * 1.09215e-08 != 5.18070e+18" ),
( x"f622919d", x"e18b1fda", x"7f800000", "-8.24322e+32 * -3.20799e+20 != +infinite" ),
( x"b0ca9902", x"b9729d49", x"2ac0011d", "-1.47409e-09 * -2.31375e-04 != 3.41068e-13" ),
( x"2c807ec5", x"99d5e980", x"86d6bd5b", " 3.65205e-12 * -2.21180e-23 != -8.07761e-35" ),
( x"b2eac9cc", x"53bf67d6", x"c72f8bcb", "-2.73330e-08 * 1.64416e+12 != -4.49398e+04" ),
( x"bf14d67e", x"2ddc8e66", x"ad803b1f", "-5.81398e-01 * 2.50743e-11 != -1.45782e-11" ),
( x"83ef5749", x"61ff698f", x"a66ecaa2", "-1.40672e-36 * 5.88941e+20 != -8.28475e-16" ),
( x"61cdd11e", x"9d9c1672", x"bffafaf4", " 4.74581e+20 * -4.13161e-21 != -1.96078e+00" ),
( x"72e61df0", x"844f4a77", x"b7ba5525", " 9.11587e+30 * -2.43669e-36 != -2.22126e-05" ),
( x"02d7e839", x"2c53cbc9", x"00000000", " 3.17247e-37 * 3.00980e-12 != +zero" ),
( x"121e3374", x"9e0cf4d5", x"80000000", " 4.99194e-28 * -7.46217e-21 != -zero" ),
( x"d49fd4a4", x"597e35cf", x"ee9eb693", "-5.49174e+12 * 4.47211e+15 != -2.45597e+28" ),
( x"3222f4cc", x"cfd3902d", x"c286ab8a", " 9.48530e-09 * -7.09888e+09 != -6.73350e+01" ),
( x"48d38f75", x"e6d91d2a", x"f0336cb4", " 4.33276e+05 * -5.12646e+23 != -2.22117e+29" ),
( x"e5c0f72b", x"78818744", x"ff800000", "-1.13907e+23 * 2.10172e+34 != -infinite" ),
( x"0e5f5000", x"d4618dbe", x"a344c0f5", " 2.75254e-30 * -3.87498e+12 != -1.06660e-17" ),
( x"7b051507", x"3b33821f", x"76baa2b1", " 6.91002e+35 * 2.73908e-03 != 1.89271e+33" ),
( x"187092da", x"6454ceb1", x"3d47fbd9", " 3.10934e-24 * 1.57024e+22 != 4.88242e-02" ),
( x"853e6915", x"f8466a04", x"3e139421", "-8.95306e-36 * -1.60973e+34 != 1.44120e-01" ),
( x"96730ed9", x"162f6768", x"80000000", "-1.96341e-25 * 1.41690e-25 != -zero" ),
( x"d4f74a4a", x"d0576876", x"65d0144c", "-8.49683e+12 * -1.44558e+10 != 1.22828e+23" ),
( x"fa16bb11", x"adae2488", x"684d1150", "-1.95660e+35 * -1.97977e-11 != 3.87362e+24" ),
( x"79fe52db", x"2543e53c", x"5fc29cd9", " 1.65065e+35 * 1.69912e-16 != 2.80466e+19" ),
( x"f445d3d8", x"28ce0bf5", x"dd9f39b5", "-6.26940e+31 * 2.28758e-14 != -1.43418e+18" ),
( x"c560593d", x"97278a59", x"1d12d375", "-3.58958e+03 * -5.41352e-25 != 1.94323e-21" ),
( x"762dd0c2", x"c9cd68d4", x"ff800000", " 8.81349e+32 * -1.68271e+06 != -infinite" ),
( x"496a7925", x"08614014", x"124e4f2a", " 9.60402e+05 * 6.77838e-34 != 6.50997e-28" ),
( x"b13b6aa5", x"1128c18c", x"82f7175c", "-2.72727e-09 * 1.33125e-28 != -3.63068e-37" ),
( x"d6a90b87", x"978c2ff1", x"2eb923ec", "-9.29335e+13 * -9.05939e-25 != 8.41921e-11" ),
( x"151d9a95", x"c19be1c0", x"973fef27", " 3.18278e-26 * -1.94852e+01 != -6.20173e-25" ),
( x"7ee9a89a", x"a786c2b5", x"e6f5ffef", " 1.55293e+38 * -3.74036e-15 != -5.80850e+23" ),
( x"54bf9ae7", x"d923d155", x"ee75389c", " 6.58350e+12 * -2.88191e+15 != -1.89731e+28" ),
( x"903828d1", x"d96ca166", x"2a2a39bc", "-3.63190e-29 * -4.16285e+15 != 1.51191e-13" ),
( x"5e4ee130", x"9cfed971", x"bbcdf326", " 3.72681e+18 * -1.68645e-21 != -6.28509e-03" ),
( x"9fe2a5e2", x"0c9bb447", x"80000000", "-9.59892e-20 * 2.39900e-31 != -zero" ),
( x"65382a46", x"89a98279", x"af73e389", " 5.43560e+22 * -4.08080e-33 != -2.21816e-10" ),
( x"7a7678c2", x"63b126df", x"7f800000", " 3.19939e+35 * 6.53575e+21 != +infinite" ),
( x"da296d3e", x"62e09612", x"fd94a2e8", "-1.19223e+16 * 2.07144e+21 != -2.46965e+37" ),
( x"34bf39a6", x"3f895ef1", x"34cd398a", " 3.56185e-07 * 1.07321e+00 != 3.82261e-07" ),
( x"6d0ee36c", x"28a11e20", x"5633dbaf", " 2.76386e+27 * 1.78877e-14 != 4.94390e+13" ),
( x"1dcbc203", x"3f410784", x"1d99a340", " 5.39343e-21 * 7.54021e-01 != 4.06676e-21" ),
( x"0f140565", x"1b2861c9", x"00000000", " 7.29800e-30 * 1.39282e-22 != +zero" ),
( x"c5e72c8e", x"463608dc", x"cca461ad", "-7.39757e+03 * 1.16502e+04 != -8.61833e+07" ),
( x"f3a88dfe", x"bef2eb71", x"731ff13f", "-2.67086e+31 * -4.74453e-01 != 1.26719e+31" ),
( x"ffa0d03b", x"75068c7e", x"ffe0d03b", " -qnan * 1.70561e+32 != -snan" ),
( x"8778734d", x"d0be82be", x"18b8e476", "-1.86913e-34 * -2.55699e+10 != 4.77936e-24" ),
( x"dbc24641", x"2b8cfa30", x"c7d5f891", "-1.09367e+17 * 1.00170e-12 != -1.09553e+05" ),
( x"7f70f0a7", x"54863295", x"7f800000", " 3.20264e+38 * 4.61099e+12 != +infinite" ),
( x"aa5b6813", x"0be6fcf5", x"8000000c", "-1.94872e-13 * 8.89734e-32 != -subnormal" ),
( x"cabe7d9f", x"898a411b", x"14cdc053", "-6.24200e+06 * -3.32835e-33 != 2.07756e-26" ),
( x"fdb84f68", x"f6727b14", x"7f800000", "-3.06238e+37 * -1.22952e+33 != +infinite" ),
( x"99cdd30d", x"f0443ab4", x"4a9dc4c8", "-2.12817e-23 * -2.42920e+29 != 5.16976e+06" ),
( x"a6665333", x"0bcba110", x"80000000", "-7.99100e-16 * 7.84351e-32 != -zero" )
);
begin
 
dut:fpmult port map(clk,d,q);
16,14 → 409,205
 
clock:process
begin
wait for 10 ns; clk <= not clk;
wait for (clock_period/2);
clk<=not clk;
end process clock;
 
stimulus:process
variable test_condition:test_condition_type;
begin
d.a<="00111111110110010100011101010101"; -- 0x3FD94755 -> 1.69748938
d.b<="00111111101101110110110011100001"; -- 0x3FB76CE1 -> 1.43301022
wait;
-----------------------------------------------------------------------------
-- Check qualifying functions and constants
-----------------------------------------------------------------------------
assert not fp_is_normal(plus_zero) report "Bad +0" severity error;
assert fp_is_zero(plus_zero) report "Bad +0" severity error;
assert not fp_is_subnormal(plus_zero) report "Bad +0" severity error;
assert not fp_is_infinite(plus_zero) report "Bad +0" severity error;
assert not fp_is_nan(plus_zero) report "Bad +0" severity error;
assert not fp_is_signalling(plus_zero) report "Bad +0" severity error;
assert not fp_is_quiet(plus_zero) report "Bad +0" severity error;
assert fp_is_positive(plus_zero) report "Bad +0" severity error;
assert not fp_is_negative(plus_zero) report "Bad +0" severity error;
 
assert not fp_is_normal(minus_zero) report "Bad -0" severity error;
assert fp_is_zero(minus_zero) report "Bad -0" severity error;
assert not fp_is_subnormal(minus_zero) report "Bad -0" severity error;
assert not fp_is_infinite(minus_zero) report "Bad -0" severity error;
assert not fp_is_nan(minus_zero) report "Bad -0" severity error;
assert not fp_is_signalling(minus_zero) report "Bad -0" severity error;
assert not fp_is_quiet(minus_zero) report "Bad -0" severity error;
assert not fp_is_positive(minus_zero) report "Bad -0" severity error;
assert fp_is_negative(minus_zero) report "Bad -0" severity error;
 
assert fp_is_normal(plus_normal) report "Bad +normal" severity error;
assert not fp_is_zero(plus_normal) report "Bad +normal" severity error;
assert not fp_is_subnormal(plus_normal) report "Bad +normal" severity error;
assert not fp_is_infinite(plus_normal) report "Bad +normal" severity error;
assert not fp_is_nan(plus_normal) report "Bad +normal" severity error;
assert not fp_is_signalling(plus_normal) report "Bad +normal" severity error;
assert not fp_is_quiet(plus_normal) report "Bad +normal" severity error;
assert fp_is_positive(plus_normal) report "Bad +normal" severity error;
assert not fp_is_negative(plus_normal) report "Bad +normal" severity error;
 
assert fp_is_normal(minus_normal) report "Bad -normal" severity error;
assert not fp_is_zero(minus_normal) report "Bad -normal" severity error;
assert not fp_is_subnormal(minus_normal) report "Bad -normal" severity error;
assert not fp_is_infinite(minus_normal) report "Bad -normal" severity error;
assert not fp_is_nan(minus_normal) report "Bad -normal" severity error;
assert not fp_is_signalling(minus_normal) report "Bad -normal" severity error;
assert not fp_is_quiet(minus_normal) report "Bad -normal" severity error;
assert not fp_is_positive(minus_normal) report "Bad -normal" severity error;
assert fp_is_negative(minus_normal) report "Bad -normal" severity error;
 
assert fp_is_normal(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_zero(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_subnormal(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_infinite(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_nan(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_signalling(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_quiet(plus_normal_squared) report "Bad +normal^2" severity error;
assert fp_is_positive(plus_normal_squared) report "Bad +normal^2" severity error;
assert not fp_is_negative(plus_normal_squared) report "Bad +normal^2" severity error;
 
assert fp_is_normal(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_zero(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_subnormal(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_infinite(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_nan(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_signalling(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_quiet(minus_normal_squared) report "Bad -normal^2" severity error;
assert not fp_is_positive(minus_normal_squared) report "Bad -normal^2" severity error;
assert fp_is_negative(minus_normal_squared) report "Bad -normal^2" severity error;
 
assert not fp_is_normal(plus_subnormal) report "Bad +subnormal" severity error;
assert not fp_is_zero(plus_subnormal) report "Bad +subnormal" severity error;
assert fp_is_subnormal(plus_subnormal) report "Bad +subnormal" severity error;
assert not fp_is_infinite(plus_subnormal) report "Bad +subnormal" severity error;
assert not fp_is_nan(plus_subnormal) report "Bad +subnormal" severity error;
assert not fp_is_signalling(plus_subnormal) report "Bad +subnormal" severity error;
assert not fp_is_quiet(plus_subnormal) report "Bad +subnormal" severity error;
assert fp_is_positive(plus_subnormal) report "Bad +subnormal" severity error;
assert not fp_is_negative(plus_subnormal) report "Bad +subnormal" severity error;
 
assert not fp_is_normal(minus_subnormal) report "Bad -subnormal" severity error;
assert not fp_is_zero(minus_subnormal) report "Bad -subnormal" severity error;
assert fp_is_subnormal(minus_subnormal) report "Bad -subnormal" severity error;
assert not fp_is_infinite(minus_subnormal) report "Bad -subnormal" severity error;
assert not fp_is_nan(minus_subnormal) report "Bad -subnormal" severity error;
assert not fp_is_signalling(minus_subnormal) report "Bad -subnormal" severity error;
assert not fp_is_quiet(minus_subnormal) report "Bad -subnormal" severity error;
assert not fp_is_positive(minus_subnormal) report "Bad -subnormal" severity error;
assert fp_is_negative(minus_subnormal) report "Bad -subnormal" severity error;
 
assert not fp_is_normal(plus_infinite) report "Bad +infinite" severity error;
assert not fp_is_zero(plus_infinite) report "Bad +infinite" severity error;
assert not fp_is_subnormal(plus_infinite) report "Bad +infinite" severity error;
assert fp_is_infinite(plus_infinite) report "Bad +infinite" severity error;
assert not fp_is_nan(plus_infinite) report "Bad +infinite" severity error;
assert not fp_is_signalling(plus_infinite) report "Bad +infinite" severity error;
assert not fp_is_quiet(plus_infinite) report "Bad +infinite" severity error;
assert fp_is_positive(plus_infinite) report "Bad +infinite" severity error;
assert not fp_is_negative(plus_infinite) report "Bad +infinite" severity error;
 
assert not fp_is_normal(minus_infinite) report "Bad -infinite" severity error;
assert not fp_is_zero(minus_infinite) report "Bad -infinite" severity error;
assert not fp_is_subnormal(minus_infinite) report "Bad -infinite" severity error;
assert fp_is_infinite(minus_infinite) report "Bad -infinite" severity error;
assert not fp_is_nan(minus_infinite) report "Bad -infinite" severity error;
assert not fp_is_signalling(minus_infinite) report "Bad -infinite" severity error;
assert not fp_is_quiet(minus_infinite) report "Bad -infinite" severity error;
assert not fp_is_positive(minus_infinite) report "Bad -infinite" severity error;
assert fp_is_negative(minus_infinite) report "Bad -infinite" severity error;
 
assert not fp_is_normal(plus_qnan) report "Bad +qnan" severity error;
assert not fp_is_zero(plus_qnan) report "Bad +qnan" severity error;
assert not fp_is_subnormal(plus_qnan) report "Bad +qnan" severity error;
assert not fp_is_infinite(plus_qnan) report "Bad +qnan" severity error;
assert fp_is_nan(plus_qnan) report "Bad +qnan" severity error;
assert not fp_is_signalling(plus_qnan) report "Bad +qnan" severity error;
assert fp_is_quiet(plus_qnan) report "Bad +qnan" severity error;
assert fp_is_positive(plus_qnan) report "Bad +qnan" severity error;
assert not fp_is_negative(plus_qnan) report "Bad +qnan" severity error;
 
assert not fp_is_normal(minus_qnan) report "Bad -qnan" severity error;
assert not fp_is_zero(minus_qnan) report "Bad -qnan" severity error;
assert not fp_is_subnormal(minus_qnan) report "Bad -qnan" severity error;
assert not fp_is_infinite(minus_qnan) report "Bad -qnan" severity error;
assert fp_is_nan(minus_qnan) report "Bad -qnan" severity error;
assert not fp_is_signalling(minus_qnan) report "Bad -qnan" severity error;
assert fp_is_quiet(minus_qnan) report "Bad -qnan" severity error;
assert not fp_is_positive(minus_qnan) report "Bad -qnan" severity error;
assert fp_is_negative(minus_qnan) report "Bad -qnan" severity error;
 
assert not fp_is_normal(plus_snan) report "Bad +snan" severity error;
assert not fp_is_zero(plus_snan) report "Bad +snan" severity error;
assert not fp_is_subnormal(plus_snan) report "Bad +snan" severity error;
assert not fp_is_infinite(plus_snan) report "Bad +snan" severity error;
assert fp_is_nan(plus_snan) report "Bad +snan" severity error;
assert fp_is_signalling(plus_snan) report "Bad +snan" severity error;
assert not fp_is_quiet(plus_snan) report "Bad +snan" severity error;
assert fp_is_positive(plus_snan) report "Bad +snan" severity error;
assert not fp_is_negative(plus_snan) report "Bad +snan" severity error;
 
assert not fp_is_normal(minus_snan) report "Bad -snan" severity error;
assert not fp_is_zero(minus_snan) report "Bad -snan" severity error;
assert not fp_is_subnormal(minus_snan) report "Bad -snan" severity error;
assert not fp_is_infinite(minus_snan) report "Bad -snan" severity error;
assert fp_is_nan(minus_snan) report "Bad -snan" severity error;
assert fp_is_signalling(minus_snan) report "Bad -snan" severity error;
assert not fp_is_quiet(minus_snan) report "Bad -snan" severity error;
assert not fp_is_positive(minus_snan) report "Bad -snan" severity error;
assert fp_is_negative(minus_snan) report "Bad -snan" severity error;
 
-----------------------------------------------------------------------------
-- Check multiplier
-----------------------------------------------------------------------------
for i in multiplier_testset'range loop
test_condition:=multiplier_testset(i);
d.a<=test_condition.a;
d.b<=test_condition.b;
wait for pipeline_delay;
assert q.p = test_condition.p report test_condition.msg severity error;
end loop;
 
-----------------------------------------------------------------------------
-- Check pipeline
-----------------------------------------------------------------------------
for i in pipeline_testset'range loop
test_condition:=pipeline_testset(i);
d.a<=test_condition.a;
d.b<=test_condition.b;
wait for clock_period;
if i>=number_of_stages then
assert q.p = pipeline_testset(i-number_of_stages+1).p report pipeline_testset(i-number_of_stages+1).msg severity error;
end if;
end loop;
 
d.a<="0"&"01111111"&"10110010100011101010101"; -- 0x3FD94755 -> +1.69748938083648681640625E0
d.b<="0"&"01111111"&"01101110110110011100001"; -- 0x3FB76CE1 -> +1.43301022052764892578125E0
-- 0 01111111 100110111010111001100110110100101000110110110101
-- 0 10000000 100110111010111001100110110100101000110110110101
-- 0 10000000 00110111010111001100111 0x401bae67 -> +2.4325196743011474609375E0
-- |-----||--||-----||--||--||--||--||--|
wait for 20 ns;
 
d.a<="1"&"10000000"&"10010010000111111011011"; -- 0xC0490FDB -> -3.1415927410125732421875E0
d.b<="0"&"10000010"&"00001011110001011101010"; -- 0x4105E2EA -> +8.3678989410400390625E0
-- 1 10000011 011010010010011101110100100011101101010000101110
-- 1 10000011 11010010010011101110100100011101101010000101110
-- 1 10000011 10100100100111011101001 0xC1D24EE9 -> -2.62885303497314453125E1
-- |-----||--||-----||--||--||--||--||--|
wait for 20 ns;
 
d.a<="1"&"10000101"&"01110011100001000111010"; -- 0xC2B9C23A -> -9.28793487548828125E1
d.b<="1"&"10000111"&"11010001001111000001110"; -- 0xC3E89E0E -> -4.6523480224609375E2
-- 0 10001101 101010001100101010110100100110000110101100101100
-- 0 10001110 101010001100101010110100100110000110101100101100
-- 0 10001110 01010001100101010110101 0x4728CAB5 -> +4.321070703125E4
-- |-----||--||-----||--||--||--||--||--|
wait for 20 ns;
 
wait for 1 us;
end process stimulus;
 
end testbench;
/fpmult.vhdl
1,6 → 1,7
library ieee;
use ieee.std_logic_1164.all;
use work.fpmult_comp.all;
use work.fpmult_stage_pre_comp.all;
use work.fpmult_stage0_comp.all;
use work.fpmult_stageN_comp.all;
use work.fpmult_stage23_comp.all;
14,6 → 15,8
end;
 
architecture structural of fpmult is
signal fpmult_stage_pre_in:fpmult_stage_pre_in_type;
signal fpmult_stage_pre_out:fpmult_stage_pre_out_type;
signal fpmult_stage0_in:fpmult_stage0_in_type;
signal fpmult_stage0_out:fpmult_stage0_out_type;
signal fpmult_stage23_in:fpmult_stage23_in_type;
23,8 → 26,13
signal fpmult_stageN_in_array:fpmult_stageN_in_array_type;
signal fpmult_stageN_out_array:fpmult_stageN_out_array_type;
begin
fpmult_stage0_in.a<=d.a;
fpmult_stage0_in.b<=d.b;
fpmult_stage_pre_in.a<=d.a;
fpmult_stage_pre_in.b<=d.b;
 
stage_pre:fpmult_stage_pre port map(clk,fpmult_stage_pre_in,fpmult_stage_pre_out);
 
fpmult_stage0_in.a<=fpmult_stage_pre_out.a;
fpmult_stage0_in.b<=fpmult_stage_pre_out.b;
 
stage0:fpmult_stage0 port map(clk,fpmult_stage0_in,fpmult_stage0_out);
 
/fpmult_stage0.vhdl
1,97 → 1,62
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.fp_generic.all;
use work.fpmult_stage0_comp.all;
 
entity fpmult_stage0 is
port(
clk:in std_logic;
d:in fpmult_stage0_in_type;
q:out fpmult_stage0_out_type
);
end;
 
architecture twoproc of fpmult_stage0 is
type reg_type is record
a:fp_type;
b:fp_type;
 
p_sign:fp_sign_type;
p_exp:fp_exp_type;
p_mantissa:fp_long_mantissa_type;
end record;
signal r,rin:reg_type;
begin
comb:process(d,r)
variable v:reg_type;
variable a_is_normal,b_is_normal:boolean;
variable a_is_subnormal,b_is_subnormal:boolean;
variable a_is_zero,b_is_zero:boolean;
variable a_is_infinite,b_is_infinite:boolean;
variable a_is_nan,b_is_nan:boolean;
variable is_normal:boolean;
variable is_zero:boolean;
variable is_infinite:boolean;
variable is_nan:boolean;
begin
-- sample register outputs
v:=r;
 
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
use work.fp_generic.all;
use work.fpmult_stage0_comp.all;
 
entity fpmult_stage0 is
port(
clk:in std_logic;
d:in fpmult_stage0_in_type;
q:out fpmult_stage0_out_type
);
end;
 
architecture twoproc of fpmult_stage0 is
type reg_type is record
a:fp_type;
b:fp_type;
 
p_sign:fp_sign_type;
p_exp:fp_exp_type;
p_mantissa:fp_long_mantissa_type;
end record;
signal r,rin:reg_type;
begin
comb:process(d,r)
variable v:reg_type;
begin
-- sample register outputs
v:=r;
 
-- overload
v.a:=d.a;
v.b:=d.b;
 
a_is_normal:=fp_is_normal(v.a);
b_is_normal:=fp_is_normal(v.b);
a_is_subnormal:=fp_is_subnormal(v.a);
b_is_subnormal:=fp_is_subnormal(v.b);
a_is_zero:=fp_is_zero(v.a);
b_is_zero:=fp_is_zero(v.b);
a_is_infinite:=fp_is_infinite(v.a);
b_is_infinite:=fp_is_infinite(v.b);
a_is_nan:=fp_is_nan(v.a);
b_is_nan:=fp_is_nan(v.b);
 
if a_is_normal or b_is_normal then
if a_is_normal and b_is_normal then
is_normal:=true;
end if;
if a_is_zero or b_is_zero then
is_zero:=true;
end if;
if a_is_infinite or b_is_infinite then
is_infinite:=true;
end if;
if a_is_nan or b_is_nan then
is_nan:=true;
end if;
end if;
v.p_sign:=fp_sign(d.a) xor fp_sign(d.b);
v.p_exp:=fp_exp(d.a) + fp_exp(d.b) - 127;
if fp_mantissa(d.b)(0)='1' then
v.p_mantissa:=resize(fp_mantissa(d.a),48);
else
v.p_mantissa:=(others=>'0');
end if;
 
-- drive register inputs
rin<=v;
 
-- drive outputs
q.a<=r.a;
q.b<=r.b;
 
q.p_sign<=r.p_sign;
q.p_exp<=r.p_exp;
q.p_mantissa<=r.p_mantissa;
end process;
seq:process(clk,rin)
begin
if rising_edge(clk) then
r<=rin;
end if;
end process;
v.a:=d.a;
v.b:=d.b;
 
v.p_sign:=fp_sign(d.a) xor fp_sign(d.b);
v.p_exp:=fp_exp(d.a) + fp_exp(d.b) - 127;
if fp_mantissa(d.b)(0)='1' then
v.p_mantissa:=resize(fp_mantissa(d.a),48);
else
v.p_mantissa:=(others=>'0');
end if;
 
-- drive register inputs
rin<=v;
 
-- drive outputs
q.a<=r.a;
q.b<=r.b;
 
q.p_sign<=r.p_sign;
q.p_exp<=r.p_exp;
q.p_mantissa<=r.p_mantissa;
end process;
seq:process(clk,rin)
begin
if rising_edge(clk) then
r<=rin;
end if;
end process;
end;

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