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opt_merge: test some unary cells

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Emil J. Tywoniak 2025-03-10 12:30:00 +01:00
parent 176faae7c9
commit ae7a97cc2d
1 changed files with 65 additions and 4 deletions
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69
tests/opt/opt_merge_basic.ys
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@ -1,13 +1,74 @@
read_verilog -icells <<EOT
read_verilog <<EOT
module top(A, B, X, Y);
input [8:0] A, B;
output [8:0] X, Y;
input [7:0] A, B;
output [7:0] X, Y;
assign X = A + B;
assign Y = A + B;
endmodule
EOT
# Most basic case
# Binary
select -assert-count 2 t:$add
equiv_opt -assert opt_merge
design -load postopt
select -assert-count 1 t:$add
design -reset
read_verilog <<EOT
module top(A, B, C, X, Y);
input [7:0] A, B, C;
output [7:0] X, Y;
assign X = A + B;
assign Y = A + C;
endmodule
EOT
# Reject on a different input
select -assert-count 2 t:$add
opt_merge
select -assert-count 2 t:$add
design -reset
read_verilog <<EOT
module top(A, X, Y);
input [7:0] A;
output X, Y;
assign X = ^A;
assign Y = ^A;
endmodule
EOT
# Unary
select -assert-count 2 t:$reduce_xor
dump
opt_merge
select -assert-count 1 t:$reduce_xor
design -reset
read_verilog -icells <<EOT
module top(A, B, X, Y);
input [7:0] A;
input [7:0] B;
output X, Y;
\$reduce_or #(
.A_SIGNED(32'd0),
.A_WIDTH(32'd16),
.Y_WIDTH(32'd1),
) one (
.A({A, B}), // <- look here
.Y(X)
);
\$reduce_or #(
.A_SIGNED(32'd0),
.A_WIDTH(32'd16),
.Y_WIDTH(32'd1),
) other (
.A({B, A}), // <- look here
.Y(Y)
);
endmodule
EOT
# Unary
opt_expr
select -assert-count 2 t:$reduce_or
equiv_opt -assert opt_merge
design -load postopt
select -assert-count 1 t:$reduce_or