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multiply_tb: Fix multiply_tb.vhdl for the new multiplier interface

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Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
pull/382/head
Paul Mackerras 2 years ago
parent b0aa5340b8
commit 20f49f06f8
1 changed files with 34 additions and 42 deletions
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76
multiply_tb.vhdl
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@ -26,15 +26,6 @@ architecture behave of multiply_tb is
signal m1 : MultiplyInputType := MultiplyInputInit;
signal m2 : MultiplyOutputType;

function absval(x: std_ulogic_vector) return std_ulogic_vector is
begin
if x(x'left) = '1' then
return std_ulogic_vector(- signed(x));
else
return x;
end if;
end;

begin
multiply_0: entity work.multiply
generic map (PIPELINE_DEPTH => pipeline_depth)
@ -51,7 +42,6 @@ begin
stim_process: process
variable ra, rb, rt, behave_rt: std_ulogic_vector(63 downto 0);
variable si: std_ulogic_vector(15 downto 0);
variable sign: std_ulogic;
variable rnd : RandomPType;
begin
rnd.InitSeed(stim_process'path_name);
@ -102,11 +92,11 @@ begin

behave_rt := ppc_mulld(ra, rb);

m1.data1 <= absval(ra);
m1.data2 <= absval(rb);
sign := ra(63) xor rb(63);
m1.not_result <= sign;
m1.addend <= (others => sign);
m1.data1 <= ra;
m1.data2 <= rb;
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

wait for clk_period;
@ -128,7 +118,8 @@ begin

m1.data1 <= ra;
m1.data2 <= rb;
m1.not_result <= '0';
m1.is_signed <= '0';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

@ -149,11 +140,11 @@ begin

behave_rt := ppc_mulhd(ra, rb);

m1.data1 <= absval(ra);
m1.data2 <= absval(rb);
sign := ra(63) xor rb(63);
m1.not_result <= sign;
m1.addend <= (others => sign);
m1.data1 <= ra;
m1.data2 <= rb;
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

wait for clk_period;
@ -173,13 +164,13 @@ begin

behave_rt := ppc_mullw(ra, rb);

m1.data1 <= (others => '0');
m1.data1(31 downto 0) <= absval(ra(31 downto 0));
m1.data2 <= (others => '0');
m1.data2(31 downto 0) <= absval(rb(31 downto 0));
sign := ra(31) xor rb(31);
m1.not_result <= sign;
m1.addend <= (others => sign);
m1.data1 <= (others => ra(31));
m1.data1(31 downto 0) <= ra(31 downto 0);
m1.data2 <= (others => rb(31));
m1.data2(31 downto 0) <= rb(31 downto 0);
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

wait for clk_period;
@ -199,13 +190,13 @@ begin

behave_rt := ppc_mulhw(ra, rb);

m1.data1 <= (others => '0');
m1.data1(31 downto 0) <= absval(ra(31 downto 0));
m1.data2 <= (others => '0');
m1.data2(31 downto 0) <= absval(rb(31 downto 0));
sign := ra(31) xor rb(31);
m1.not_result <= sign;
m1.addend <= (others => sign);
m1.data1 <= (others => ra(31));
m1.data1(31 downto 0) <= ra(31 downto 0);
m1.data2 <= (others => rb(31));
m1.data2(31 downto 0) <= rb(31 downto 0);
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

wait for clk_period;
@ -229,7 +220,8 @@ begin
m1.data1(31 downto 0) <= ra(31 downto 0);
m1.data2 <= (others => '0');
m1.data2(31 downto 0) <= rb(31 downto 0);
m1.not_result <= '0';
m1.is_signed <= '0';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

@ -250,12 +242,12 @@ begin

behave_rt := ppc_mulli(ra, si);

m1.data1 <= absval(ra);
m1.data2 <= (others => '0');
m1.data2(15 downto 0) <= absval(si);
sign := ra(63) xor si(15);
m1.not_result <= sign;
m1.addend <= (others => sign);
m1.data1 <= ra;
m1.data2 <= (others => si(15));
m1.data2(15 downto 0) <= si;
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';

wait for clk_period;

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