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[Add] switch to 7-stage and pass func test

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包焕垲
2023-07-28 15:29:06 +08:00
parent bf2dd4655b
commit 3a070d35fc
12 changed files with 431 additions and 305 deletions
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60
lacpu/rtl/mycpu/mul_div_lock.v
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@@ -8,58 +8,74 @@ module mul_div_lock (
input div_en,
input stallreq_for_mul,
input stallreq_for_div,
input sign_flag,
input rem_flag,
output [31:0] a_locked,
output [31:0] b_locked,
output mul_en_locked,
output div_en_locked
output div_en_locked,
output sign_flag_locked,
output rem_flag_locked
);
reg first_enable;
reg mul_en_musk;
reg div_en_musk;
reg [31:0] a_buffer;
reg [31:0] b_buffer;
reg sign_flag_buffer;
reg rem_flag_buffer;
wire stallreq = stallreq_for_mul | stallreq_for_div;
assign mul_en_locked = mul_en & mul_en_musk;
assign div_en_locked = div_en & div_en_musk;
assign a_locked = first_enable ? a : a_buffer;
assign b_locked = first_enable ? b : b_buffer;
assign a_locked = first_enable ? a : a_buffer;
assign b_locked = first_enable ? b : b_buffer;
assign sign_flag_locked = first_enable ? sign_flag : sign_flag_buffer;
assign rem_flag_locked = first_enable ? rem_flag : rem_flag_buffer;
always @ (posedge clk) begin
if (reset) begin
a_buffer <= 0;
b_buffer <= 0;
mul_en_musk <= 1;
div_en_musk <= 1;
a_buffer <= 0;
b_buffer <= 0;
sign_flag_buffer <= 0;
rem_flag_buffer <= 0;
mul_en_musk <= 1;
div_en_musk <= 1;
first_enable <= 1;
end
else if (mul_en & first_enable) begin
a_buffer <= a;
b_buffer <= b;
mul_en_musk <= 0;
div_en_musk <= 1;
a_buffer <= a;
b_buffer <= b;
sign_flag_buffer <= sign_flag;
rem_flag_buffer <= rem_flag;
mul_en_musk <= 0;
div_en_musk <= 1;
first_enable <= 0;
first_enable <= 0;
end
else if (div_en & first_enable) begin
a_buffer <= a;
b_buffer <= b;
mul_en_musk <= 1;
div_en_musk <= 0;
a_buffer <= a;
b_buffer <= b;
sign_flag_buffer <= sign_flag;
rem_flag_buffer <= rem_flag;
mul_en_musk <= 1;
div_en_musk <= 0;
first_enable <= 0;
first_enable <= 0;
end
else if (!stallreq & (mul_en|div_en) & !first_enable & !stall[2]) begin
a_buffer <= 0;
b_buffer <= 0;
mul_en_musk <= 1;
div_en_musk <= 1;
a_buffer <= 0;
b_buffer <= 0;
sign_flag_buffer <= 0;
rem_flag_buffer <= 0;
mul_en_musk <= 1;
div_en_musk <= 1;
first_enable <= 1;
first_enable <= 1;
end
end