Re: [Valgrind-users] SSE instruction?

[Nicholas N. <nj...@ca...>]

On Thu, 17 Apr 2003, Jos van den Oever wrote:

> Now I'm rather clueless about SSE, but I know 3DNow is Athlon specific.
> Is SSE Pentium related? Or is MMX not completely implemented yet?

SSE and SSE2 are yet more sets of extra instructions, like MMX and 3DNow.
They are supported by modern Pentiums and Athlons.  Valgrind doesn't yet
support them.

However, NVidia also noticed this it seems, and the "latest" drivers
(version 4349, apparently) come with this text

        DISABLING CPU SPECIFIC FEATURES

        Setting the environment variable __GL_FORCE_GENERIC_CPU to a
        non-zero value will inhibit the use of CPU specific features
        such as MMX, SSE, or 3DNOW!.  Use of this option may result in
        performance loss.  This option may be useful in conjunction with
        software such as the Valgrind memory debugger.

Set __GL_FORCE_GENERIC_CPU=1 and Valgrind should work.

N