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SDL_atomic.c, SDL_spinlock.c: use lock prefix with xchg in Watcom asm.

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This commit is contained in:
Ozkan Sezer 2018-09-27 11:55:02 +03:00
parent bb5516ac8e
commit d9fb77a3c1
2 changed files with 3 additions and 2 deletions
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3
src/atomic/SDL_atomic.c
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@ -53,10 +53,11 @@
#endif
#if defined(__WATCOMC__) && defined(__386__)
SDL_COMPILE_TIME_ASSERT(intsize, 4==sizeof(int));
#define HAVE_WATCOM_ATOMICS
extern _inline int _SDL_xchg_watcom(volatile int *a, int v);
#pragma aux _SDL_xchg_watcom = \
"xchg [ecx], eax" \
"lock xchg [ecx], eax" \
parm [ecx] [eax] \
value [eax] \
modify exact [eax];

2
src/atomic/SDL_spinlock.c
View File

@ -40,7 +40,7 @@
SDL_COMPILE_TIME_ASSERT(locksize, 4==sizeof(SDL_SpinLock));
extern _inline int _SDL_xchg_watcom(volatile int *a, int v);
#pragma aux _SDL_xchg_watcom = \
"xchg [ecx], eax" \
"lock xchg [ecx], eax" \
parm [ecx] [eax] \
value [eax] \
modify exact [eax];