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RIP $safe_pmux

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This commit is contained in:
Clifford Wolf 2014-08-14 11:39:46 +02:00
parent 28cf48e31f
commit 13f2f36884
16 changed files with 21 additions and 98 deletions
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31
techlibs/common/simlib.v
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@ -938,39 +938,16 @@ input [S_WIDTH-1:0] S;
output reg [WIDTH-1:0] Y;
integer i;
reg found_active_sel_bit;
always @* begin
Y = A;
for (i = 0; i < S_WIDTH; i = i+1)
if (S[i])
Y = B >> (WIDTH*i);
end
endmodule
// --------------------------------------------------------
module \$safe_pmux (A, B, S, Y);
parameter WIDTH = 0;
parameter S_WIDTH = 0;
input [WIDTH-1:0] A;
input [WIDTH*S_WIDTH-1:0] B;
input [S_WIDTH-1:0] S;
output reg [WIDTH-1:0] Y;
integer i, j;
always @* begin
j = 0;
found_active_sel_bit = 0;
for (i = 0; i < S_WIDTH; i = i+1)
if (S[i]) begin
Y = B >> (WIDTH*i);
j = j + 1;
Y = found_active_sel_bit ? 'bx : B >> (WIDTH*i);
found_active_sel_bit = 1;
end
if (j != 1)
Y = A;
end
endmodule