Re: [PATCH] Modernize i386 string.h

[Richard Henderson]

On Sun, Jan 18, 2004 at 09:09:19PM +0100, Andi Kleen wrote:
> +#define __HAVE_ARCH_MEMCPY 1
> +extern void *__memcpy(void *to, const void *from, size_t len); 
> +#define memcpy(dst,src,len) \
> +	({ size_t __len = (len);				\
> +	   void *__ret;						\
> +	   if (__builtin_constant_p(len) && __len >= 128)	\
> +		 __ret = __memcpy((dst),(src),__len);		\
> +	   else							\
> +		 __ret = __builtin_memcpy((dst),(src),__len);	\
> +	   __ret; }) 

Why not just __builtin_memcpy?  Or indeed, why bother defining
anything at all, since the compiler will infer __builtin_memcpy
from the external symbol memcpy.


r~
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