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Fixed memory barrier macro check so it isn't quite so fragile

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This commit is contained in:
Sam Lantinga 2019-06-30 23:58:31 -07:00
parent a8bea85810
commit 959cfc428e
2 changed files with 2 additions and 1 deletions
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1
include/SDL_atomic.h
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@ -184,6 +184,7 @@ typedef void (*SDL_KernelMemoryBarrierFunc)();
#elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_5TE__)
#ifdef __thumb__
/* The mcr instruction isn't available in thumb mode, use real functions */
#define SDL_MEMORY_BARRIER_USES_FUNCTION
#define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
#define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
#else

2
src/atomic/SDL_atomic.c
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@ -289,7 +289,7 @@ SDL_AtomicGetPtr(void **a)
#endif
}
#if defined(__thumb__) && (defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) || defined(__ARM_ARCH_5TE__))
#ifdef SDL_MEMORY_BARRIER_USES_FUNCTION
#error This file should be built in arm mode so the mcr instruction is available for memory barriers
#endif