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SDL_atomic.h: Update SDL_CPUPauseInstruction for Watcom. (#7157)

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Appropriate CPU directive can be used in #pragma aux so that it is not
necessary to hardcode instruction bytes.
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Jiří Malák 2023-01-26 15:00:02 +01:00 committed by GitHub
parent d9d84c8d73
commit 507fc462db
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1 changed files with 1 additions and 2 deletions
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include/SDL_atomic.h
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@ -249,9 +249,8 @@ typedef void (*SDL_KernelMemoryBarrierFunc)();
#elif defined(_MSC_VER) && (defined(_M_ARM) || defined(_M_ARM64))
#define SDL_CPUPauseInstruction() __yield()
#elif defined(__WATCOMC__) && defined(__386__)
/* watcom assembler rejects PAUSE if CPU < i686, and it refuses REP NOP as an invalid combination. Hardcode the bytes. */
extern __inline void SDL_CPUPauseInstruction(void);
#pragma aux SDL_CPUPauseInstruction = "db 0f3h,90h"
#pragma aux SDL_CPUPauseInstruction = ".686p" ".xmm2" "pause"
#else
#define SDL_CPUPauseInstruction()
#endif