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Merge pull request #944 from YosysHQ/clifford/pmux2shiftx

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Add pmux2shiftx command
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Clifford Wolf 2019-04-22 08:39:37 +02:00 • committed by GitHub
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tests/various/pmux2shiftx.v Normal file
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module pmux2shiftx_test (
input [2:0] S1,
input [5:0] S2,
input [1:0] S3,
input [9:0] A, B, C, D, D, E, F, G, H,
input [9:0] I, J, K, L, M, N, O, P, Q,
output reg [9:0] X
);
always @* begin
case (S1)
3'd 0: X = A;
3'd 1: X = B;
3'd 2: X = C;
3'd 3: X = D;
3'd 4: X = E;
3'd 5: X = F;
3'd 6: X = G;
3'd 7: X = H;
endcase
case (S2)
6'd 45: X = I;
6'd 47: X = J;
6'd 49: X = K;
6'd 55: X = L;
6'd 57: X = M;
6'd 59: X = N;
endcase
case (S3)
2'd 1: X = O;
2'd 2: X = P;
2'd 3: X = Q;
endcase
end
endmodule

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read_verilog pmux2shiftx.v
prep
design -save gold
pmux2shiftx -min_density 70
opt
stat
# show -width
select -assert-count 1 t:$sub
select -assert-count 2 t:$mux
select -assert-count 2 t:$shift
select -assert-count 3 t:$shiftx
design -stash gate
design -import gold -as gold
design -import gate -as gate
miter -equiv -flatten -make_assert -make_outputs gold gate miter
sat -verify -prove-asserts -show-ports miter
design -load gold
stat
design -load gate
stat