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shiftx2mux: fix select out of bounds

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This commit is contained in:
Eddie Hung 2020-02-05 16:41:09 -08:00
parent 505557e93e
commit 4c1d3a126d
3 changed files with 14 additions and 2 deletions
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techlibs/common/techmap.v
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@ -152,10 +152,11 @@ module _90_shift_shiftx (A, B, Y);
localparam len = 2**(B_WIDTH-1);
localparam Y_WIDTH2 = 2**CLOG2_Y_WIDTH;
wire [len-1:0] T, F, AA;
wire [(A_WIDTH+Y_WIDTH2*2):0] Apad = {{Y_WIDTH2*2{extbit}}, A};
genvar i;
for (i = 0; i < A_WIDTH; i=i+Y_WIDTH2*2) begin
assign F[i/2 +: Y_WIDTH2] = A[i +: Y_WIDTH2];
assign T[i/2 +: Y_WIDTH2] = (i + Y_WIDTH2 < A_WIDTH) ? A[i+Y_WIDTH2 +: Y_WIDTH2] : {Y_WIDTH2{extbit}};
assign T[i/2 +: Y_WIDTH2] = Apad[i+Y_WIDTH2 +: Y_WIDTH2];
assign AA[i/2 +: Y_WIDTH2] = B[CLOG2_Y_WIDTH] ? T[i/2 +: Y_WIDTH2] : F[i/2 +: Y_WIDTH2];
end
wire [B_WIDTH-2:0] BB = {B[B_WIDTH-1:CLOG2_Y_WIDTH+1], {CLOG2_Y_WIDTH{1'b0}}};