yosys/tests/peepopt/multdiv_c.ys

log -header "Test simple positive case"
log -push
design -reset
read_verilog <<EOF
module top (
  input wire  [31:0] a,
  output wire  [63:0] y
);
  assign y = (a * 5140) / (257 * 2);
endmodule
EOF
check -assert
copy top orig
cd top
peepopt
select -assert-none  t:$div
clean -purge
cd
miter -equiv -flatten -make_assert -make_outputs -ignore_gold_x top orig miter
sat -verify -prove-asserts -show-ports -enable_undef miter


log -pop
log -header "Test negative case where div is kept"
log -push
design -reset
read_verilog <<EOF
module top (
  input wire signed [31:0] a,
  output wire signed [63:0] y,
  output wire probe
);
   wire [44:0] tmp = (a * 5140);
   assign probe = tmp[44];

  assign y = tmp[43:0] / (257 * 2);
endmodule
EOF
check -assert
copy top orig
cd top
peepopt
select -assert-any t:$div
clean -purge
cd
miter -equiv -flatten -make_assert -make_outputs -ignore_gold_x top orig miter
sat -verify -prove-asserts -show-ports -enable_undef miter