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yosys/tests/simple/peepopt.v
Clifford Wolf cb285e4b87 Do not use shiftmul peepopt pattern when mul result is truncated, fixes #1047
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-05-28 17:17:56 +02:00

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Verilog

module peepopt_shiftmul_0 #(parameter N=3, parameter W=3) (input [N*W-1:0] i, input [$clog2(N)-1:0] s, output [W-1:0] o);
assign o = i[s*W+:W];
endmodule
module peepopt_shiftmul_1 (output y, input [2:0] w);
assign y = 1'b1 >> (w * (3'b110));
endmodule
module peepopt_muldiv_0(input [1:0] i, output [1:0] o);
wire [3:0] t;
assign t = i * 3;
assign o = t / 3;
endmodule