> 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),
>
If I use:
(define_expand "addsi"
addsi3
"{
emit_insn (gen_addhi3 (custom_subword(operands[0], 0, SImode),
custom_subword(operands[1], 0, SImode),
custom_sub
I have a fictitious machine which has a word size of 8-bits but can handle
16-bit adds and 16-bit mov's. I am trying to build the most efficient support
for handling an addsi3 insn. My problem is that if I try to split up the
addsi3 insn into a couple of addhi3 insns (using a define_expand tem
