On Oct 3, 2005, at 5:56 PM, Evan Cheng wrote:
My mistake. I misunderstood the meaning of -msse3 (it only enables the
sse3 builtins). Please ignore.
Actually it enables more than the builtins. It enables the use sse3
instructions. This is just like -maltivec on PowerPC and -msse and
-msse
on x86, etc.
Hmm, but from the original patch:
http://gcc.gnu.org/ml/gcc-patches/2005-03/msg01119.html
"BTW: Regarding TARGET_FISTTP macro: according to documentation, fisttp
insn indeed depends on (TARGET_80387 && TARGET_SSE3). However, this
insn is not a SSE3 instruction, so it should not be disabled by
-mno-sse3 flag."
And then RTH agreed:
http://gcc.gnu.org/ml/gcc-patches/2005-03/msg01432.html
So from the sound of it fisttp is not a SSE3 instruction.
Thanks,
Andrew Pinski
