From c97b671d64a5f137177989a28c684a13b5cb249b Mon Sep 17 00:00:00 2001 From: Michal Krol Date: Mon, 16 Mar 2009 13:42:22 +0100 Subject: [PATCH] gallium: Implement atomic for MSVC on x86. --- src/gallium/include/pipe/p_atomic.h | 66 ++++++++++++++++++++++++++++- 1 file changed, 65 insertions(+), 1 deletion(-) diff --git a/src/gallium/include/pipe/p_atomic.h b/src/gallium/include/pipe/p_atomic.h index 13866d220e0..b9bf711714e 100644 --- a/src/gallium/include/pipe/p_atomic.h +++ b/src/gallium/include/pipe/p_atomic.h @@ -66,7 +66,71 @@ p_atomic_cmpxchg(struct pipe_atomic *v, int32_t old, int32_t new) return __sync_val_compare_and_swap(&v->count, old, new); } -#elif (defined(PIPE_SUBSYSTEM_WINDOWS_USER)) /* (defined(PIPE_CC_GCC)) */ +#elif (defined(PIPE_ARCH_X86) && defined(PIPE_CC_MSVC)) /* (defined(PIPE_CC_GCC)) */ + +struct pipe_atomic +{ + int32_t count; +}; + +#define p_atomic_set(_v, _i) ((_v)->count = (_i)) +#define p_atomic_read(_v) ((_v)->count) + +static INLINE boolean +p_atomic_dec_zero(struct pipe_atomic *v) +{ + int32_t *pcount = &v->count; + unsigned char c; + + __asm { + mov eax, [pcount] + lock dec dword ptr [eax] + sete byte ptr [c] + } + + return c != 0; +} + +static INLINE void +p_atomic_inc(struct pipe_atomic *v) +{ + int32_t *pcount = &v->count; + + __asm { + mov eax, [pcount] + lock inc dword ptr [eax] + } +} + +static INLINE void +p_atomic_dec(struct pipe_atomic *v) +{ + int32_t *pcount = &v->count; + + __asm { + mov eax, [pcount] + lock dec dword ptr [eax] + } +} + +static INLINE int32_t +p_atomic_cmpxchg(struct pipe_atomic *v, int32_t old, int32_t new) +{ + int32_t *pcount = &v->count; + int32_t orig; + + __asm { + mov ecx, [pcount] + mov eax, [old] + mov edx, [new] + lock cmpxchg [ecx], edx + mov [orig], eax + } + + return orig; +} + +#elif (defined(PIPE_SUBSYSTEM_WINDOWS_USER)) /* (defined(PIPE_ARCH_X86) && defined(PIPE_CC_MSVC)) */ struct pipe_atomic { -- 2.30.2