DAZ mode on P4 doesn't stick

DAZ mode on P4 doesn't stick

Hi all,

Enabling DAZ mode on my development P4 (1.8 GHz) doesn't seem to stick for very long. When I step through my code with VC++ 6, I see in the MXCSR register that bit 6 gets reset a single step after loading it, seemingly on its own accord.

Also, VTune continues to report loads of SIMD input assists, which shouldn't happen since I have DAZ enabled.

Has anyone seen this before? How can I make DAZ mode stick?



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