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This commit is contained in:
Eddie Hung 2019-04-22 16:58:44 -07:00
parent 61161faefc
commit 69863f7698
1 changed files with 3 additions and 0 deletions
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techlibs/xilinx/cells_map.v
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@ -170,6 +170,9 @@ module \$shiftx (A, B, Y);
for (i = 0; i < Y_WIDTH; i++)
\$shiftx #(.A_SIGNED(A_SIGNED), .B_SIGNED(B_SIGNED), .A_WIDTH(A_WIDTH), .B_WIDTH(B_WIDTH), .Y_WIDTH(1'd1)) bitblast (.A({{i{1'bx}}, A[A_WIDTH-1:i]}), .B(B), .Y(Y[i]));
end
// If the LSB of B is constant zero (and Y_WIDTH is 1) then
// we can optimise by removing every other entry from A
// and popping the constant zero from B
else if (_TECHMAP_CONSTMSK_B_[0] && !_TECHMAP_CONSTVAL_B_[0]) begin
wire [(A_WIDTH+1)/2-1:0] A_i;
for (i = 0; i < (A_WIDTH+1)/2; i++)