------- Comment #2 from pluto at agmk dot net 2008-11-30 10:23 ------- (In reply to comment #1) > You need -mtune=core to generate "movd %xmm0, %rax". Gcc 4.4 works.
is movd faster only on core2 architecture?
and what about 32-bits?
$ /opt/gcc44/bin/gcc movd.c -O2 -S -march=core2 -m32
foo: pushl %ebp
movl %esp, %ebp
subl $16, %esp
movq %mm0, -16(%ebp) <===? movd mm0, eax
movl -16(%ebp), %eax <===/
leave
ret
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38320
