Merge pull request #30 from antonblanchard/writeback-assert

Add some assertions to writeback
nia-debug
Anton Blanchard 5 years ago committed by GitHub
commit 045a00c5d7
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@ -1,5 +1,6 @@
library ieee;
use ieee.std_logic_1164.all;
use ieee.numeric_std.all;

library work;
use work.common.all;
@ -41,9 +42,21 @@ begin
complete_out <= '1' when e.valid or l.valid or m.valid else '0';

writeback_1: process(all)
variable x: std_ulogic_vector(0 downto 0);
variable y: std_ulogic_vector(0 downto 0);
variable z: std_ulogic_vector(0 downto 0);
begin
--assert (unsigned(w.valid) + unsigned(l.valid) + unsigned(m.valid)) <= 1;
--assert not(w.write_enable = '1' and l.write_enable = '1');
x := "" & e.valid;
y := "" & l.valid;
z := "" & m.valid;
assert (to_integer(unsigned(x)) + to_integer(unsigned(y)) + to_integer(unsigned(z))) <= 1;

x := "" & e.write_enable;
y := "" & l.write_enable;
z := "" & m.write_reg_enable;
assert (to_integer(unsigned(x)) + to_integer(unsigned(y)) + to_integer(unsigned(z))) <= 1;

assert not(e.write_cr_enable = '1' and m.write_cr_enable = '1');

w_tmp <= WritebackToRegisterFileInit;
c_tmp <= WritebackToCrFileInit;

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