+read_verilog -icells -formal <<EOT
+module \$__ICE40_CARRY_WRAPPER (output CO, O, input A, B, CI, I0, I3);
+ parameter LUT = 0;
+ SB_CARRY carry (
+ .I0(A),
+ .I1(B),
+ .CI(CI),
+ .CO(CO)
+ );
+ \$lut #(
+ .WIDTH(4),
+ .LUT(LUT)
+ ) lut (
+ .A({I0,A,B,I3}),
+ .Y(O)
+ );
+endmodule
+EOT
+design -stash unmap
+
read_verilog -icells -formal <<EOT
module top(input CI, I0, output [1:0] CO, output O);
wire A = 1'b0, B = 1'b0;
endmodule
EOT
-equiv_opt -assert -map +/ice40/cells_map.v -map +/ice40/cells_sim.v ice40_opt
+equiv_opt -assert -map %unmap -map +/ice40/cells_sim.v ice40_opt
design -load postopt
select -assert-count 1 t:*
select -assert-count 1 t:$lut