>>>>> "Helmut" == Helmut Eller <[EMAIL PROTECTED]> writes:
Helmut> Raymond Toy <[EMAIL PROTECTED]> writes:
>> Isn't this because you really can't "allocate" registers because the
>> FPU is a stack? I also thought this didn't hurt much because the
>> Pentium does register renaming on the FPU so those fxch instructions
>> are very fast?
Helmut> On newer processors the FPU stack is mapped to the MMX registers and
Helmut> you could allocate the corresponding MMX register. MMX registers
Helmut> could perhaps also be used as a fast cache, to avoid some spilling.
Is it still true that the MMX and the FPU registers are the same so
you can't them together without saving/restoring one or the other?
If so, this probably isn't a good idea.
Ray
