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Make sure the memory barrier functions are always available, and now they are implemented on Android __ARM_ARCH_5TE__

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This commit is contained in:
Sam Lantinga 2017-02-10 11:21:15 -08:00
parent 9171f71dbe
commit 06ccb71bcd
5 changed files with 22 additions and 30 deletions
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9
include/SDL_atomic.h
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@ -149,6 +149,9 @@ void _ReadWriteBarrier(void);
* For more information on these semantics, take a look at the blog post:
* http://preshing.com/20120913/acquire-and-release-semantics
*/
extern DECLSPEC void SDLCALL SDL_MemoryBarrierReleaseFunction(void);
extern DECLSPEC void SDLCALL SDL_MemoryBarrierAcquireFunction(void);
#if defined(__GNUC__) && (defined(__powerpc__) || defined(__ppc__))
#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("lwsync" : : : "memory")
#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("lwsync" : : : "memory")
@ -156,11 +159,11 @@ void _ReadWriteBarrier(void);
#if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7S__)
#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("dmb ish" : : : "memory")
#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("dmb ish" : : : "memory")
#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__)
#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 */
extern DECLSPEC void SDLCALL SDL_MemoryBarrierRelease(void);
extern DECLSPEC void SDLCALL SDL_MemoryBarrierAcquire(void);
#define SDL_MemoryBarrierRelease() SDL_MemoryBarrierReleaseFunction()
#define SDL_MemoryBarrierAcquire() SDL_MemoryBarrierAcquireFunction()
#else
#define SDL_MemoryBarrierRelease() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")
#define SDL_MemoryBarrierAcquire() __asm__ __volatile__ ("mcr p15, 0, %0, c7, c10, 5" : : "r"(0) : "memory")