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| author | Cameron Gutman <aicommander@gmail.com> | 2021-01-02 12:50:01 -0600 |
|---|---|---|
| committer | Cameron Gutman <aicommander@gmail.com> | 2021-01-02 12:50:01 -0600 |
| commit | d0e62e09083117b73e006dd73b331b7358b35e94 (patch) | |
| tree | 75656edbf157f221e8502f75f0dda04b285807b3 /include/SDL_endian.h | |
| parent | cf00a8221a216dd8fd7ffcabbb759693676d766f (diff) | |
| download | sdl-d0e62e09083117b73e006dd73b331b7358b35e94.tar.gz | |
Use MSVC _byteswap intrinsics for SDL byteswapping functions
This generates bswap on x86/x64 and rev on ARM
Diffstat (limited to 'include/SDL_endian.h')
| -rw-r--r-- | include/SDL_endian.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/SDL_endian.h b/include/SDL_endian.h index 7fd735bcc..1398e05b9 100644 --- a/include/SDL_endian.h +++ b/include/SDL_endian.h @@ -30,6 +30,10 @@ #include "SDL_stdinc.h" +#ifdef _MSC_VER +#include <intrin.h> +#endif + /** * \name The two types of endianness */ @@ -109,6 +113,9 @@ SDL_Swap16(Uint16 x) __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc"); return x; } +#elif defined(_MSC_VER) +#pragma intrinsic(_byteswap_ushort) +#define SDL_Swap16(x) _byteswap_ushort(x) #elif defined(__WATCOMC__) && defined(__386__) extern _inline Uint16 SDL_Swap16(Uint16); #pragma aux SDL_Swap16 = \ @@ -178,6 +185,9 @@ extern _inline Uint32 SDL_Swap32(Uint32); parm [eax] \ modify [eax]; #endif +#elif defined(_MSC_VER) +#pragma intrinsic(_byteswap_ulong) +#define SDL_Swap32(x) _byteswap_ulong(x) #else SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x) @@ -213,6 +223,9 @@ SDL_Swap64(Uint64 x) __asm__("bswapq %0": "=r"(x):"0"(x)); return x; } +#elif defined(_MSC_VER) +#pragma intrinsic(_byteswap_uint64) +#define SDL_Swap64(x) _byteswap_uint64(x) #else SDL_FORCE_INLINE Uint64 SDL_Swap64(Uint64 x) |