MMX do not depend on sse? Did FPU corrupted mmx registers?

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Roman

Joined: 21 Apr 2012
Posts: 2045

Roman 27 Jan 2026, 12:56

MMX do not depend on sse ?
I mean

Code:

mm0 = 0,0 
mov eax,2.0
movd xmm0,eax ; did not corrupted mm0 ?

Did FPU corrupted mmx registers ?

27 Jan 2026, 12:56

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20841
Location: In your JS exploiting you and your system

revolution 27 Jan 2026, 13:20

MM0-MM7 use the FPU registers.

MMX corrupts the FPU state.
FPU corrupts the MMX state.

SSE/AVX does not corrupt FPU/MMX.
Registers in SSE/AVX are separated from the FPU/MMX.

27 Jan 2026, 13:20

Roman

Joined: 21 Apr 2012
Posts: 2045

Roman 27 Jan 2026, 13:45

Very nice.

27 Jan 2026, 13:45

Roman

Joined: 21 Apr 2012
Posts: 2045

Roman 27 Jan 2026, 18:44

I found on wickipedia 3d now command FEMCA finding the integral vector .
But I not found any examples.

27 Jan 2026, 18:44

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