CFLAGS=-Os -march=pentium4 -pipe -fomit-frame-pointer:
andrey@evilhorse ~ $ objdump -d /usr/lib/libvorbis.so.0.4.4 | grep xmm
a9ee: 66 0f 6e c0 movd %eax,%xmm0
a9f2: f3 0f 2c c0 cvttss2si %xmm0,%eax
andrey@evilhorse ~ $

CFLAGS="-O3 -march=pentium4 -mfpmath=sse -mmmx -msse -msse2 -pipe -fomit-frame-pointer"
andrey@evilhorse ~ $ objdump -d /usr/lib/libvorbis.so.0.4.5 | grep xmm | wc -l
4028
andrey@evilhorse ~ $

в обоих случаях USE="mmx sse sse2"

#oshfns

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