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SDL_blit_copy: Don't call potentially FPU using SDL_memcpy in SDL_memcpyMMX

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Anonymous Maarten 2023-03-26 16:31:18 +02:00 committed by Anonymous Maarten
parent 51c10bef0b
commit cd64e0b6e3
2 changed files with 6 additions and 4 deletions
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2
CMakeLists.txt
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@ -530,11 +530,9 @@ if(USE_INTELCC)
# warning #39: division by zero # warning #39: division by zero
# warning #239: floating point underflow # warning #239: floating point underflow
# warning #264: floating-point value does not fit in required floating-point type # warning #264: floating-point value does not fit in required floating-point type
# warning #13203: No EMMS instruction before call to function
set_property(SOURCE "${SDL2_SOURCE_DIR}/src/libm/e_exp.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd239 -wd264") set_property(SOURCE "${SDL2_SOURCE_DIR}/src/libm/e_exp.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd239 -wd264")
set_property(SOURCE "${SDL2_SOURCE_DIR}/src/libm/e_log.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd39") set_property(SOURCE "${SDL2_SOURCE_DIR}/src/libm/e_log.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd39")
set_property(SOURCE "${SDL2_SOURCE_DIR}/src/libm/e_log10.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd39") set_property(SOURCE "${SDL2_SOURCE_DIR}/src/libm/e_log10.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd39")
set_property(SOURCE "${SDL2_SOURCE_DIR}/src/video/SDL_blit_copy.c" APPEND_STRING PROPERTY COMPILE_FLAGS " -wd13203")
endif() endif()

8
src/video/SDL_blit_copy.c
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@ -57,7 +57,7 @@ static SDL_INLINE void SDL_memcpySSE(Uint8 *dst, const Uint8 *src, int len)
#endif #endif
static SDL_INLINE void SDL_memcpyMMX(Uint8 *dst, const Uint8 *src, int len) static SDL_INLINE void SDL_memcpyMMX(Uint8 *dst, const Uint8 *src, int len)
{ {
const int remain = (len & 63); int remain = len & 63;
int i; int i;
__m64 *d64 = (__m64 *)dst; __m64 *d64 = (__m64 *)dst;
@ -79,7 +79,11 @@ static SDL_INLINE void SDL_memcpyMMX(Uint8 *dst, const Uint8 *src, int len)
if (remain) { if (remain) {
const int skip = len - remain; const int skip = len - remain;
SDL_memcpy(dst + skip, src + skip, remain); dst += skip;
src += skip;
while (remain--) {
*dst++ = *src++;
}
} }
} }
#endif /* __MMX__ */ #endif /* __MMX__ */