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Use system memset/memcpy on Mac OS X, since Apple hand-tunes these for each

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processor they ship (and thus, it's likely to beat our code on PowerPC and
 Intel and whatever variants or new archs show up later).

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402323
This commit is contained in:
Ryan C. Gordon 2007-06-03 06:52:06 +00:00
parent 27d3e5f271
commit e883b665af
1 changed files with 12 additions and 3 deletions
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15
include/SDL_stdinc.h
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@ -234,7 +234,10 @@ extern DECLSPEC void SDLCALL SDL_qsort(void *base, size_t nmemb, size_t size,
extern DECLSPEC void * SDLCALL SDL_memset(void *dst, int c, size_t len);
#endif
#if defined(__GNUC__) && defined(i386)
/* We can count on memset existing on Mac OS X and being well-tuned. */
#if defined(__MACH__) && defined(__APPLE__)
#define SDL_memset4(dst, val, len) memset(dst, val, (len)*4)
#elif defined(__GNUC__) && defined(i386)
#define SDL_memset4(dst, val, len) \
do { \
int u0, u1, u2; \
@ -263,7 +266,10 @@ do { \
} while(0)
#endif
#if defined(__GNUC__) && defined(i386)
/* We can count on memcpy existing on Mac OS X and being well-tuned. */
#if defined(__MACH__) && defined(__APPLE__)
#define SDL_memcpy(dst, src, len) memcpy(dst, src, len)
#elif defined(__GNUC__) && defined(i386)
#define SDL_memcpy(dst, src, len) \
do { \
int u0, u1, u2; \
@ -292,7 +298,10 @@ extern DECLSPEC void * SDLCALL SDL_memcpy(void *dst, const void *src, size_t len
#endif
#endif
#if defined(__GNUC__) && defined(i386)
/* We can count on memcpy existing on Mac OS X and being well-tuned. */
#if defined(__MACH__) && defined(__APPLE__)
#define SDL_memcpy4(dst, src, len) memcpy(dst, src, (len)*4)
#elif defined(__GNUC__) && defined(i386)
#define SDL_memcpy4(dst, src, len) \
do { \
int ecx, edi, esi; \