Versioning longjmp etc.

[Ulrich Drepper]

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Steve Munroe wrote:
> We are looking at integrating Vector Extensions (AKA Altivec or VMX) into 
> glibc for PPC32/PPC64.

Why should this be necessary?  It makes almost no sense at all to
include the content of these registers in the state.  setjmp/longjmp are
probably never used in the middle of computations in which vector
registers are used.  And if they are, this can be documented as the
users problem.  Saving and restoring makes setjmp/longjmp much more
expensive and for absolutely no gain.

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Ulrich Drepper \    ,-----------------'   \ Mountain View, CA 94041 USA
Red Hat         `--' drepper at redhat.com `---------------------------
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