yosys/docs/source/code_examples/techmap/mulshift_map.v

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2014-02-16 15:31:53 -06:00
module MYMUL(A, B, Y);
parameter WIDTH = 1;
input [WIDTH-1:0] A, B;
output reg [WIDTH-1:0] Y;
parameter _TECHMAP_CONSTVAL_A_ = WIDTH'bx;
parameter _TECHMAP_CONSTVAL_B_ = WIDTH'bx;
reg _TECHMAP_FAIL_;
wire [1023:0] _TECHMAP_DO_ = "proc; clean";
integer i;
always @* begin
_TECHMAP_FAIL_ <= 1;
for (i = 0; i < WIDTH; i=i+1) begin
if (_TECHMAP_CONSTVAL_A_ === WIDTH'd1 << i) begin
_TECHMAP_FAIL_ <= 0;
Y <= B << i;
end
if (_TECHMAP_CONSTVAL_B_ === WIDTH'd1 << i) begin
_TECHMAP_FAIL_ <= 0;
Y <= A << i;
end
end
end
endmodule