On 04/13/2011 09:05 AM, Feng LI wrote: >> You need to expand builtins yourself, a "named" expander doesn't do >> that for you. > > I'm not sure I understand this, I use define_expand to expand > the builtin function to RTX, and then define_insn * to match the > RTX and generate code. It seems it didn't generate the asm code. > >> Do you have any const or pure attributes on the tend builtin? > > Do you mean (set_attr "" "") in the define_insn?
No, see ix86_expand_builtin and its many subroutines. r~
