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multiply_tb.vhdl
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multiply_tb.vhdl
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library vunit_lib;
context vunit_lib.vunit_context;
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;
library work;
use work.decode_types.all;
use work.common.all;
use work.ppc_fx_insns.all;
library osvvm;
use osvvm.RandomPkg.all;
entity multiply_tb is
generic (runner_cfg : string := runner_cfg_default);
end multiply_tb;
architecture behave of multiply_tb is
signal clk : std_ulogic;
constant clk_period : time := 10 ns;
constant pipeline_depth : integer := 4;
signal m1 : MultiplyInputType := MultiplyInputInit;
signal m2 : MultiplyOutputType;
begin
multiply_0: entity work.multiply
generic map (PIPELINE_DEPTH => pipeline_depth)
port map (clk => clk, m_in => m1, m_out => m2);
clk_process: process
begin
clk <= '0';
wait for clk_period/2;
clk <= '1';
wait for clk_period/2;
end process;
stim_process: process
variable ra, rb, rt, behave_rt: std_ulogic_vector(63 downto 0);
variable si: std_ulogic_vector(15 downto 0);
variable rnd : RandomPType;
begin
rnd.InitSeed(stim_process'path_name);
test_runner_setup(runner, runner_cfg);
while test_suite loop
if run("Test interface") then
wait for clk_period;
m1.valid <= '1';
m1.data1 <= x"0000000000001000";
m1.data2 <= x"0000000000001111";
wait for clk_period;
check_false(?? m2.valid, result("for valid"));
m1.valid <= '0';
wait for clk_period;
check_false(?? m2.valid, result("for valid"));
wait for clk_period;
check_false(?? m2.valid, result("for valid"));
wait for clk_period;
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result, 16#1111000#);
wait for clk_period;
check_false(?? m2.valid, result("for valid"));
m1.valid <= '1';
wait for clk_period;
check_false(?? m2.valid, result("for valid"));
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result, 16#1111000#);
elsif run("Test mulld") then
mulld_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
rb := rnd.RandSlv(rb'length);
behave_rt := ppc_mulld(ra, rb);
m1.data1 <= ra;
m1.data2 <= rb;
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';
wait for clk_period;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(63 downto 0), behave_rt, result("for mulld " & to_hstring(behave_rt)));
end loop;
elsif run("Test mulhdu") then
mulhdu_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
rb := rnd.RandSlv(rb'length);
behave_rt := ppc_mulhdu(ra, rb);
m1.data1 <= ra;
m1.data2 <= rb;
m1.is_signed <= '0';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';
wait for clk_period;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(127 downto 64), behave_rt, result("for mulhdu " & to_hstring(behave_rt)));
end loop;
elsif run("Test mulhd") then
mulhd_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
rb := rnd.RandSlv(rb'length);
behave_rt := ppc_mulhd(ra, rb);
m1.data1 <= ra;
m1.data2 <= rb;
m1.is_signed <= '1';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';
wait for clk_period;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(127 downto 64), behave_rt, result("for mulhd " & to_hstring(behave_rt)));
end loop;
elsif run("Test mullw") then
mullw_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
rb := rnd.RandSlv(rb'length);
behave_rt := ppc_mullw(ra, rb);
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;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(63 downto 0), behave_rt, result("for mullw " & to_hstring(behave_rt)));
end loop;
elsif run("Test mulhw") then
mulhw_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
rb := rnd.RandSlv(rb'length);
behave_rt := ppc_mulhw(ra, rb);
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;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(63 downto 32) & m2.result(63 downto 32), behave_rt, result("for mulhw " & to_hstring(behave_rt)));
end loop;
elsif run("Test mulhwu") then
mulhwu_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
rb := rnd.RandSlv(rb'length);
behave_rt := ppc_mulhwu(ra, rb);
m1.data1 <= (others => '0');
m1.data1(31 downto 0) <= ra(31 downto 0);
m1.data2 <= (others => '0');
m1.data2(31 downto 0) <= rb(31 downto 0);
m1.is_signed <= '0';
m1.subtract <= '0';
m1.addend <= (others => '0');
m1.valid <= '1';
wait for clk_period;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(63 downto 32) & m2.result(63 downto 32), behave_rt, result("for mulhwu " & to_hstring(behave_rt)));
end loop;
elsif run("Test mulli") then
mulli_loop : for i in 0 to 1000 loop
ra := rnd.RandSlv(ra'length);
si := rnd.RandSlv(si'length);
behave_rt := ppc_mulli(ra, si);
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;
m1.valid <= '0';
wait for clk_period * (pipeline_depth-1);
check_true(?? m2.valid, result("for valid"));
check_equal(m2.result(63 downto 0), behave_rt, result("for mulli " & to_hstring(behave_rt)));
end loop;
end if;
end loop;
test_runner_cleanup(runner);
wait;
end process;
end behave;