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added Watcom i386 inline asm for SDL_Swap64()

This commit is contained in:
Ozkan Sezer 2021-02-23 17:37:20 +03:00
parent c287087fcc
commit b8d2185277
1 changed files with 8 additions and 0 deletions
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8
include/SDL_endian.h
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@ -232,6 +232,14 @@ SDL_Swap64(Uint64 x)
__asm__("bswapq %0": "=r"(x):"0"(x));
return x;
}
#elif defined(__WATCOMC__) && defined(__386__)
extern _inline Uint64 SDL_Swap64(Uint64);
#pragma aux SDL_Swap64 = \
"bswap eax" \
"bswap edx" \
"xchg eax,edx" \
parm [eax edx] \
modify [eax edx];
#elif defined(_MSC_VER)
#pragma intrinsic(_byteswap_uint64)
#define SDL_Swap64(x) _byteswap_uint64(x)