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Re: MMX regs and GCC
Jeff Garzik wrote:
> What do you think about the case of a program that does little or no
> floating point at all? It seems like that would be an optimal, and
> common, case for using MMX registers, while minimized FP context
> save/store. Also I was wondering if it was possible to avoid EMMS by
> using 3DNow for 'single' and 'float'.
Is copying to/from MMX really any faster than a stack memory access?
I was under the impression that they're both fast, but MMX has
additional emms overhead.
-- Jamie