[PATCH] [BZ #19679] [x86_64] Set DL_RUNIME_UNALIGNED_VEC_SIZE to 8

[Andreas Schwab]

"H.J. Lu" <hjl.tools@gmail.com> writes:

> -#ifndef DL_RUNIME_UNALIGNED_VEC_SIZE
> -/* The maximum size of unaligned vector load and store.  */
> -# define DL_RUNIME_UNALIGNED_VEC_SIZE 16
> +#ifndef DL_RUNTIME_UNALIGNED_VEC_SIZE
> +/* The maximum size in bytes of unaligned vector load and store in the
> +   dynamic linker.  Since SSE optimized memory/string functions with
> +   aligned SSE register load and store are used in the dynamic linker,
> +   we must set this to 8 so that _dl_runtime_resolve_sse will align the
> +   stack before calling _dl_fixup.  */
> +# define DL_RUNTIME_UNALIGNED_VEC_SIZE 8
>  #endif

Why isn't DL_RUNTIME_UNALIGNED_VEC_SIZE unconditionally defined?

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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