MMX, SSE?

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mike.dld

Joined: 03 Oct 2003
Posts: 235
Location: Belarus, Minsk

mike.dld 19 Apr 2004, 06:06

I was confused a bit when my program terminated on such kind of instruction:

Code:

movdq xmm0,[mem]

any suggestions???

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19 Apr 2004, 06:06

madmatt

Joined: 07 Oct 2003
Posts: 1045
Location: Michigan, USA

madmatt 19 Apr 2004, 08:46

mike.dld wrote:

I was confused a bit when my program terminated on such kind of instruction:
Code:
movdq xmm0,[mem]    
any suggestions???

no such instruction, You should use:
MOVDQA - for 16-byte aligned memory only!
or
MOVDQU - for 16-byte un-aligned memory (slow)

19 Apr 2004, 08:46

mike.dld

Joined: 03 Oct 2003
Posts: 235
Location: Belarus, Minsk

mike.dld 19 Apr 2004, 15:41

sorry, I was wrong - of course movdqa, but it not works anyway

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19 Apr 2004, 15:41

f0dder

Joined: 19 Feb 2004
Posts: 3175
Location: Denmark

f0dder 19 Apr 2004, 23:02

Does menuet set the correct control register flags and handle the XMM state on context switches? If the unaligned fails too, this might be your problem.

19 Apr 2004, 23:02

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