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util: Remove u_atomic.h's GCC inline assembly. 

GCC >= 4.1 support the __sync_* intrinsics. That seems like a
sufficiently old baseline.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This commit is contained in:
Matt Turner 2014-11-21 16:28:21 -08:00
parent 972f8458f1
commit 2879a77a37
1 changed files with 0 additions and 122 deletions
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122
src/util/u_atomic.h
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@ -21,133 +21,11 @@
#define PIPE_ATOMIC_MSVC_INTRINSIC
#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401)
#define PIPE_ATOMIC_GCC_INTRINSIC
#elif (defined(__GNUC__) && defined(__i386__))
#define PIPE_ATOMIC_ASM_GCC_X86
#elif (defined(__GNUC__) && defined(__x86_64__))
#define PIPE_ATOMIC_ASM_GCC_X86_64
#else
#error "Unsupported platform"
#endif
#if defined(PIPE_ATOMIC_ASM_GCC_X86_64)
#define PIPE_ATOMIC "GCC x86_64 assembly"
#ifdef __cplusplus
extern "C" {
#endif
#define p_atomic_set(_v, _i) (*(_v) = (_i))
#define p_atomic_read(_v) (*(_v))
static inline boolean
p_atomic_dec_zero(int32_t *v)
{
unsigned char c;
__asm__ __volatile__("lock; decl %0; sete %1":"+m"(*v), "=qm"(c)
::"memory");
return c != 0;
}
static inline void
p_atomic_inc(int32_t *v)
{
__asm__ __volatile__("lock; incl %0":"+m"(*v));
}
static inline void
p_atomic_dec(int32_t *v)
{
__asm__ __volatile__("lock; decl %0":"+m"(*v));
}
static inline int32_t
p_atomic_inc_return(int32_t *v)
{
return __sync_add_and_fetch(v, 1);
}
static inline int32_t
p_atomic_dec_return(int32_t *v)
{
return __sync_sub_and_fetch(v, 1);
}
static inline int32_t
p_atomic_cmpxchg(int32_t *v, int32_t old, int32_t _new)
{
return __sync_val_compare_and_swap(v, old, _new);
}
#ifdef __cplusplus
}
#endif
#endif /* PIPE_ATOMIC_ASM_GCC_X86_64 */
#if defined(PIPE_ATOMIC_ASM_GCC_X86)
#define PIPE_ATOMIC "GCC x86 assembly"
#ifdef __cplusplus
extern "C" {
#endif
#define p_atomic_set(_v, _i) (*(_v) = (_i))
#define p_atomic_read(_v) (*(_v))
static inline boolean
p_atomic_dec_zero(int32_t *v)
{
unsigned char c;
__asm__ __volatile__("lock; decl %0; sete %1":"+m"(*v), "=qm"(c)
::"memory");
return c != 0;
}
static inline void
p_atomic_inc(int32_t *v)
{
__asm__ __volatile__("lock; incl %0":"+m"(*v));
}
static inline void
p_atomic_dec(int32_t *v)
{
__asm__ __volatile__("lock; decl %0":"+m"(*v));
}
static inline int32_t
p_atomic_inc_return(int32_t *v)
{
return __sync_add_and_fetch(v, 1);
}
static inline int32_t
p_atomic_dec_return(int32_t *v)
{
return __sync_sub_and_fetch(v, 1);
}
static inline int32_t
p_atomic_cmpxchg(int32_t *v, int32_t old, int32_t _new)
{
return __sync_val_compare_and_swap(v, old, _new);
}
#ifdef __cplusplus
}
#endif
#endif
/* Implementation using GCC-provided synchronization intrinsics
*/
#if defined(PIPE_ATOMIC_GCC_INTRINSIC)