> If I use:
> (define_expand "addsi"
> [(set (match_operand:SI 0 "general_operand" "=g")
> (plus:SI (match_operand:SI 1 "general_operand" "g")
> (match_operand:SI 2 "general_operand" "g")))]
> ""
> "{
> emit_insn (gen_addhi3 (custom_subword(operands[0], 0, SImode),
>
> custom_subword(operands[1], 0, SImode),
>
> custom_subword(operands[2], 0, SImode)));
> emit_insn (gen_addhi3 (custom_subword(operands[0], 1, SImode),
>
> custom_subword(operands[1], 1, SImode),
>
> custom_subword(operands[2], 1, SImode)));
> DONE;
> }" )
>
> the output becomes a mess of addqi, cmpqi, and branches.
Would it help to use (define_expand "addsi3" ...) instead of (define_expand
"addsi" ...) ?
Yours,
Björn
