yosys/tests/opt/opt_expr_alu.ys

read_verilog <<EOT
module test(input a, output [1:0] y);
assign y = {a,1'b0} + 1'b1;
endmodule
EOT

alumacc
equiv_opt -assert opt_expr -fine
design -load postopt
select -assert-count 1 t:$pos
select -assert-count none t:$pos t:* %D


design -reset
read_verilog <<EOT
module test(input a, output [1:0] y);
assign y = {a,1'b1} + 1'b1;
endmodule
EOT

alumacc
select -assert-count 1 t:$alu
select -assert-count none t:$alu t:* %D


design -reset
read_verilog <<EOT
module test(input a, output [1:0] y);
assign y = {a,1'b1} - 1'b1;
endmodule
EOT

equiv_opt -assert opt_expr -fine
design -load postopt
select -assert-count 1 t:$pos
select -assert-count none t:$pos t:* %D


design -reset
read_verilog <<EOT
module test(input a, output [3:0] y);
assign y = {a,3'b101} - 1'b1;
endmodule
EOT

equiv_opt -assert opt_expr -fine
design -load postopt
select -assert-count 1 t:$pos
select -assert-count none t:$pos t:* %D


design -reset
read_verilog <<EOT
module test(input a, output [3:0] y);
assign y = {a,3'b101} - 1'b1;
endmodule
EOT

alumacc
equiv_opt -assert opt_expr -fine
design -load postopt
select -assert-count 1 t:$pos
select -assert-count none t:$pos t:* %D


design -reset
read_verilog <<EOT
module test(input [1:0] a, output [3:0] y);
assign y = -{a[1], 2'b10, a[0]};
endmodule
EOT

alumacc
equiv_opt -assert opt -fine
design -load postopt
select -assert-count 1 t:$alu
select -assert-count 1 t:$alu r:Y_WIDTH=3 %i
select -assert-count 1 t:$not
select -assert-count none t:$alu t:$not t:* %D %D


design -reset
read_verilog <<EOT
module test(input [3:0] a, input [2:0] b, output [5:0] y);
assign y = {a[3:2], 1'b1, a[1:0]} + {b[2], 2'b11, b[1:0]};
endmodule
EOT

alumacc
equiv_opt -assert opt -fine
design -load postopt
dump
select -assert-count 2 t:$alu
select -assert-count 1 t:$alu r:Y_WIDTH=2 %i
select -assert-count 1 t:$alu r:Y_WIDTH=3 %i
select -assert-count none t:$alu t:* %D


design -reset
read_verilog <<EOT
module test(input [3:0] a, input [3:0] b, output [5:0] y);
assign y = {a[3:2], 1'b0, a[1:0]} + {b[3:2], 1'b0, b[1:0]};
endmodule
EOT

alumacc
equiv_opt -assert opt -fine
design -load postopt
select -assert-count 2 t:$alu
select -assert-count 2 t:$alu r:Y_WIDTH=3 %i
select -assert-count none t:$alu t:* %D