[PATCH] PPC32 Linuxthreads Chance MALLOC_ALIGNMENT for VMX
Ulrich Drepper
drepper@redhat.com
Thu Mar 11 16:54:00 GMT 2004
Steve Munroe wrote:
> The Altivec/VMX instructions require 16-byte alignment. So we need to
> change the default alignment for malloc/calloc/realloc to avoid SIGILL
> when uses malloc for vector types.
>
> Any problems with this change?
Yes. malloc memory needs only be aligned for the standard types.
If you need higher alignment use posix_memalign.
Other archs have the same requirement. We are not going to waste memory
for these special cases which must be handled special to be portable anyway.
--
⧠Ulrich Drepper ⧠Red Hat, Inc. ⧠444 Castro St ⧠Mountain View, CA â
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