Using mmx instructions.

[Frans Morsch]

Hi,

I am doing some 64 bit programming using mmx registers.

The problem is that none of the mmx instructions set
the flags. So how do you know for example if a mmx
register is zero. The best that I was able to come up
with is:
movd eax,mm0 ;Test if mm0 is null.
pslrq mm0,32 ;shift rigth
movd ebx,mm0
or eax,ebx
je .....

There must be a better (faster) way to do this, what
about using floating point instructions. I know that
mmx and fp aren't supposed to be mixed, but...

Hints, tips anyone ?

fmo...@xs4all.nl
Frans Morsch