On 01/17/2017 03:41 PM, Steve Silva wrote:
Hi Nathan,
Thanks for your advice. I retooled the addhi3 sequence to look like this:
The md.texi file seems to have exactly the example you need:
Here for example, is how the 68000 halfword-add
instruction is defined:
@smallexample
(define_insn "addhi3"
[(set (match_operand:HI 0 "general_operand" "=m,r")
(plus:HI (match_operand:HI 1 "general_operand" "%0,0")
(match_operand:HI 2 "general_operand" "di,g")))]
@dots{})
no need for an expander and 2 insn patterns.
--
Nathan Sidwell
