[FFmpeg-devel] Anybody has a Core 2? [PATCH] Small SSSE3 optimization

Mike Melanson mike
Tue May 8 17:52:12 CEST 2007

Zuxy Meng wrote:
> Hi,
> Attached patch makes use of SSSE3 instruction pabsw to calculate the
> absolute value of packed words. Just for fun. And I don't have a SSSE3
> capable CPU so hopefully someone with a Core 2 can help test it to
> ensure it doesn't break anything (better with benchmarks of course:-)
> ).

I have a Core 2 machine. However, what toolchain do I need in order to
support this instruction set? The assembler does not recognize pabsw. E.g:

/tmp/ccNd2neI.s: Assembler messages:
/tmp/ccNd2neI.s:6323: Error: no such instruction: `pabsw %mm0,%mm0'
/tmp/ccNd2neI.s:6324: Error: no such instruction: `pabsw %mm1,%mm1'

$ cat /proc/cpuinfo
model name      : Intel(R) Core(TM)2 CPU          6400  @ 2.13GHz

$ gcc --version
gcc (GCC) 4.1.1 (Gentoo 4.1.1-r3)

$ as --version
GNU assembler 2.16.1

	-Mike Melanson

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