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277 extern DECLSPEC void *SDLCALL SDL_memset(void *dst, int c, size_t len); |
277 extern DECLSPEC void *SDLCALL SDL_memset(void *dst, int c, size_t len); |
278 #endif |
278 #endif |
279 #define SDL_zero(x) SDL_memset(&(x), 0, sizeof((x))) |
279 #define SDL_zero(x) SDL_memset(&(x), 0, sizeof((x))) |
280 #define SDL_zerop(x) SDL_memset((x), 0, sizeof(*(x))) |
280 #define SDL_zerop(x) SDL_memset((x), 0, sizeof(*(x))) |
281 |
281 |
282 #if defined(__GNUC__) && defined(i386) |
282 /* We can count on memset existing on Mac OS X and being well-tuned. */ |
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283 #if defined(__MACH__) && defined(__APPLE__) |
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284 #define SDL_memset4(dst, val, len) memset(dst, val, (len)*4) |
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285 #elif defined(__GNUC__) && defined(i386) |
283 #define SDL_memset4(dst, val, len) \ |
286 #define SDL_memset4(dst, val, len) \ |
284 do { \ |
287 do { \ |
285 int u0, u1, u2; \ |
288 int u0, u1, u2; \ |
286 __asm__ __volatile__ ( \ |
289 __asm__ __volatile__ ( \ |
287 "cld\n\t" \ |
290 "cld\n\t" \ |
306 } while ( --_n ); \ |
309 } while ( --_n ); \ |
307 } \ |
310 } \ |
308 } while(0) |
311 } while(0) |
309 #endif |
312 #endif |
310 |
313 |
311 #if defined(__GNUC__) && defined(i386) |
314 /* We can count on memcpy existing on Mac OS X and being well-tuned. */ |
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315 #if defined(__MACH__) && defined(__APPLE__) |
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316 #define SDL_memcpy(dst, src, len) memcpy(dst, src, len) |
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317 #elif defined(__GNUC__) && defined(i386) |
312 #define SDL_memcpy(dst, src, len) \ |
318 #define SDL_memcpy(dst, src, len) \ |
313 do { \ |
319 do { \ |
314 int u0, u1, u2; \ |
320 int u0, u1, u2; \ |
315 __asm__ __volatile__ ( \ |
321 __asm__ __volatile__ ( \ |
316 "cld\n\t" \ |
322 "cld\n\t" \ |
336 extern DECLSPEC void *SDLCALL SDL_memcpy(void *dst, const void *src, |
342 extern DECLSPEC void *SDLCALL SDL_memcpy(void *dst, const void *src, |
337 size_t len); |
343 size_t len); |
338 #endif |
344 #endif |
339 #endif |
345 #endif |
340 |
346 |
341 #if defined(__GNUC__) && defined(i386) |
347 /* We can count on memcpy existing on Mac OS X and being well-tuned. */ |
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348 #if defined(__MACH__) && defined(__APPLE__) |
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349 #define SDL_memcpy4(dst, src, len) memcpy(dst, src, (len)*4) |
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350 #elif defined(__GNUC__) && defined(i386) |
342 #define SDL_memcpy4(dst, src, len) \ |
351 #define SDL_memcpy4(dst, src, len) \ |
343 do { \ |
352 do { \ |
344 int ecx, edi, esi; \ |
353 int ecx, edi, esi; \ |
345 __asm__ __volatile__ ( \ |
354 __asm__ __volatile__ ( \ |
346 "cld\n\t" \ |
355 "cld\n\t" \ |