X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Futil%2Fu_atomic.h;h=db56835e9d4f9ba6ed219770849ed1375e624b83;hb=32bf7229e51bd82db9ed04ed04481eeb0a7728b7;hp=56c5740bfbd50b7af78d92f256d5a53d2972e74f;hpb=a5299e9e1ca45f7bcf72347dc0fd47986d779769;p=mesa.git diff --git a/src/util/u_atomic.h b/src/util/u_atomic.h index 56c5740bfbd..db56835e9d4 100644 --- a/src/util/u_atomic.h +++ b/src/util/u_atomic.h @@ -6,10 +6,13 @@ * */ +#include "no_extern_c.h" + #ifndef U_ATOMIC_H #define U_ATOMIC_H #include +#include /* Favor OS-provided implementations. * @@ -21,7 +24,7 @@ #define PIPE_ATOMIC_OS_SOLARIS #elif defined(_MSC_VER) #define PIPE_ATOMIC_MSVC_INTRINSIC -#elif defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 401) +#elif defined(__GNUC__) #define PIPE_ATOMIC_GCC_INTRINSIC #else #error "Unsupported platform" @@ -34,13 +37,39 @@ #define PIPE_ATOMIC "GCC Sync Intrinsics" +#if defined(USE_GCC_ATOMIC_BUILTINS) + +/* The builtins with explicit memory model are available since GCC 4.7. */ +#define p_atomic_set(_v, _i) __atomic_store_n((_v), (_i), __ATOMIC_RELEASE) +#define p_atomic_read(_v) __atomic_load_n((_v), __ATOMIC_ACQUIRE) +#define p_atomic_dec_zero(v) (__atomic_sub_fetch((v), 1, __ATOMIC_ACQ_REL) == 0) +#define p_atomic_inc(v) (void) __atomic_add_fetch((v), 1, __ATOMIC_ACQ_REL) +#define p_atomic_dec(v) (void) __atomic_sub_fetch((v), 1, __ATOMIC_ACQ_REL) +#define p_atomic_add(v, i) (void) __atomic_add_fetch((v), (i), __ATOMIC_ACQ_REL) +#define p_atomic_inc_return(v) __atomic_add_fetch((v), 1, __ATOMIC_ACQ_REL) +#define p_atomic_dec_return(v) __atomic_sub_fetch((v), 1, __ATOMIC_ACQ_REL) +#define p_atomic_add_return(v, i) __atomic_add_fetch((v), (i), __ATOMIC_ACQ_REL) +#define p_atomic_xchg(v, i) __atomic_exchange_n((v), (i), __ATOMIC_ACQ_REL) +#define PIPE_NATIVE_ATOMIC_XCHG + +#else + #define p_atomic_set(_v, _i) (*(_v) = (_i)) #define p_atomic_read(_v) (*(_v)) #define p_atomic_dec_zero(v) (__sync_sub_and_fetch((v), 1) == 0) #define p_atomic_inc(v) (void) __sync_add_and_fetch((v), 1) #define p_atomic_dec(v) (void) __sync_sub_and_fetch((v), 1) +#define p_atomic_add(v, i) (void) __sync_add_and_fetch((v), (i)) #define p_atomic_inc_return(v) __sync_add_and_fetch((v), 1) #define p_atomic_dec_return(v) __sync_sub_and_fetch((v), 1) +#define p_atomic_add_return(v, i) __sync_add_and_fetch((v), (i)) + +#endif + +/* There is no __atomic_* compare and exchange that returns the current value. + * Also, GCC 5.4 seems unable to optimize a compound statement expression that + * uses an additional stack variable with __atomic_compare_exchange[_n]. + */ #define p_atomic_cmpxchg(v, old, _new) \ __sync_val_compare_and_swap((v), (old), (_new)) @@ -60,8 +89,10 @@ #define p_atomic_dec_zero(_v) (p_atomic_dec_return(_v) == 0) #define p_atomic_inc(_v) ((void) p_atomic_inc_return(_v)) #define p_atomic_dec(_v) ((void) p_atomic_dec_return(_v)) +#define p_atomic_add(_v, _i) ((void) p_atomic_add_return((_v), (_i))) #define p_atomic_inc_return(_v) (++(*(_v))) #define p_atomic_dec_return(_v) (--(*(_v))) +#define p_atomic_add_return(_v, _i) (*(_v) = *(_v) + (_i)) #define p_atomic_cmpxchg(_v, _old, _new) (*(_v) == (_old) ? (*(_v) = (_new), (_old)) : *(_v)) #endif @@ -71,8 +102,8 @@ #define PIPE_ATOMIC "MSVC Intrinsics" -/* We use the Windows header's Interlocked* functions instead of the - * _Interlocked* intrinsics wherever we can, as support for the latter varies +/* We use the Windows header's Interlocked*64 functions instead of the + * _Interlocked*64 intrinsics wherever we can, as support for the latter varies * with target CPU, whereas Windows headers take care of all portability * issues: using intrinsics where available, falling back to library * implementations where not. @@ -84,8 +115,6 @@ #include #include -#pragma intrinsic(_InterlockedCompareExchange8) - /* MSVC supports decltype keyword, but it's only supported on C++ and doesn't * quite work here; and if a C++-only solution is worthwhile, then it would be * better to use templates / function overloading, instead of decltype magic. @@ -102,25 +131,35 @@ ((void) p_atomic_inc_return(_v)) #define p_atomic_inc_return(_v) (\ - sizeof *(_v) == sizeof(short) ? InterlockedIncrement16((short *) (_v)) : \ - sizeof *(_v) == sizeof(long) ? InterlockedIncrement ((long *) (_v)) : \ - sizeof *(_v) == sizeof(__int64) ? InterlockedIncrement64((__int64 *)(_v)) : \ + sizeof *(_v) == sizeof(short) ? _InterlockedIncrement16((short *) (_v)) : \ + sizeof *(_v) == sizeof(long) ? _InterlockedIncrement ((long *) (_v)) : \ + sizeof *(_v) == sizeof(__int64) ? InterlockedIncrement64 ((__int64 *)(_v)) : \ (assert(!"should not get here"), 0)) #define p_atomic_dec(_v) \ ((void) p_atomic_dec_return(_v)) #define p_atomic_dec_return(_v) (\ - sizeof *(_v) == sizeof(short) ? InterlockedDecrement16((short *) (_v)) : \ - sizeof *(_v) == sizeof(long) ? InterlockedDecrement ((long *) (_v)) : \ - sizeof *(_v) == sizeof(__int64) ? InterlockedDecrement64((__int64 *)(_v)) : \ + sizeof *(_v) == sizeof(short) ? _InterlockedDecrement16((short *) (_v)) : \ + sizeof *(_v) == sizeof(long) ? _InterlockedDecrement ((long *) (_v)) : \ + sizeof *(_v) == sizeof(__int64) ? InterlockedDecrement64 ((__int64 *)(_v)) : \ + (assert(!"should not get here"), 0)) + +#define p_atomic_add(_v, _i) \ + ((void) p_atomic_add_return((_v), (_i))) + +#define p_atomic_add_return(_v, _i) (\ + sizeof *(_v) == sizeof(char) ? _InterlockedExchangeAdd8 ((char *) (_v), (_i)) : \ + sizeof *(_v) == sizeof(short) ? _InterlockedExchangeAdd16((short *) (_v), (_i)) : \ + sizeof *(_v) == sizeof(long) ? _InterlockedExchangeAdd ((long *) (_v), (_i)) : \ + sizeof *(_v) == sizeof(__int64) ? InterlockedExchangeAdd64((__int64 *)(_v), (_i)) : \ (assert(!"should not get here"), 0)) #define p_atomic_cmpxchg(_v, _old, _new) (\ - sizeof *(_v) == sizeof(char) ? _InterlockedCompareExchange8((char *) (_v), (char) (_new), (char) (_old)) : \ - sizeof *(_v) == sizeof(short) ? InterlockedCompareExchange16((short *) (_v), (short) (_new), (short) (_old)) : \ - sizeof *(_v) == sizeof(long) ? InterlockedCompareExchange ((long *) (_v), (long) (_new), (long) (_old)) : \ - sizeof *(_v) == sizeof(__int64) ? InterlockedCompareExchange64((__int64 *)(_v), (__int64)(_new), (__int64)(_old)) : \ + sizeof *(_v) == sizeof(char) ? _InterlockedCompareExchange8 ((char *) (_v), (char) (_new), (char) (_old)) : \ + sizeof *(_v) == sizeof(short) ? _InterlockedCompareExchange16((short *) (_v), (short) (_new), (short) (_old)) : \ + sizeof *(_v) == sizeof(long) ? _InterlockedCompareExchange ((long *) (_v), (long) (_new), (long) (_old)) : \ + sizeof *(_v) == sizeof(__int64) ? InterlockedCompareExchange64 ((__int64 *)(_v), (__int64)(_new), (__int64)(_old)) : \ (assert(!"should not get here"), 0)) #endif @@ -149,28 +188,42 @@ sizeof(*v) == sizeof(uint64_t) ? atomic_inc_64((uint64_t *)(v)) : \ (assert(!"should not get here"), 0)) -#define p_atomic_inc_return(v) ((typeof(*v)) \ +#define p_atomic_inc_return(v) (__typeof(*v))( \ sizeof(*v) == sizeof(uint8_t) ? atomic_inc_8_nv ((uint8_t *)(v)) : \ sizeof(*v) == sizeof(uint16_t) ? atomic_inc_16_nv((uint16_t *)(v)) : \ sizeof(*v) == sizeof(uint32_t) ? atomic_inc_32_nv((uint32_t *)(v)) : \ sizeof(*v) == sizeof(uint64_t) ? atomic_inc_64_nv((uint64_t *)(v)) : \ (assert(!"should not get here"), 0)) -#define p_atomic_dec(v) ((void) \ +#define p_atomic_dec(v) (void) ( \ sizeof(*v) == sizeof(uint8_t) ? atomic_dec_8 ((uint8_t *)(v)) : \ sizeof(*v) == sizeof(uint16_t) ? atomic_dec_16((uint16_t *)(v)) : \ sizeof(*v) == sizeof(uint32_t) ? atomic_dec_32((uint32_t *)(v)) : \ sizeof(*v) == sizeof(uint64_t) ? atomic_dec_64((uint64_t *)(v)) : \ (assert(!"should not get here"), 0)) -#define p_atomic_dec_return(v) ((typeof(*v)) \ +#define p_atomic_dec_return(v) (__typeof(*v))( \ sizeof(*v) == sizeof(uint8_t) ? atomic_dec_8_nv ((uint8_t *)(v)) : \ sizeof(*v) == sizeof(uint16_t) ? atomic_dec_16_nv((uint16_t *)(v)) : \ sizeof(*v) == sizeof(uint32_t) ? atomic_dec_32_nv((uint32_t *)(v)) : \ sizeof(*v) == sizeof(uint64_t) ? atomic_dec_64_nv((uint64_t *)(v)) : \ (assert(!"should not get here"), 0)) -#define p_atomic_cmpxchg(v, old, _new) ((typeof(*v)) \ +#define p_atomic_add(v, i) (void) ( \ + sizeof(*v) == sizeof(uint8_t) ? atomic_add_8 ((uint8_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint16_t) ? atomic_add_16((uint16_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint32_t) ? atomic_add_32((uint32_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint64_t) ? atomic_add_64((uint64_t *)(v), (i)) : \ + (assert(!"should not get here"), 0)) + +#define p_atomic_add_return(v, i) (__typeof(*v)) ( \ + sizeof(*v) == sizeof(uint8_t) ? atomic_add_8_nv ((uint8_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint16_t) ? atomic_add_16_nv((uint16_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint32_t) ? atomic_add_32_nv((uint32_t *)(v), (i)) : \ + sizeof(*v) == sizeof(uint64_t) ? atomic_add_64_nv((uint64_t *)(v), (i)) : \ + (assert(!"should not get here"), 0)) + +#define p_atomic_cmpxchg(v, old, _new) (__typeof(*v))( \ sizeof(*v) == sizeof(uint8_t) ? atomic_cas_8 ((uint8_t *)(v), (uint8_t )(old), (uint8_t )(_new)) : \ sizeof(*v) == sizeof(uint16_t) ? atomic_cas_16((uint16_t *)(v), (uint16_t)(old), (uint16_t)(_new)) : \ sizeof(*v) == sizeof(uint32_t) ? atomic_cas_32((uint32_t *)(v), (uint32_t)(old), (uint32_t)(_new)) : \ @@ -183,6 +236,33 @@ #error "No pipe_atomic implementation selected" #endif - +#ifndef PIPE_NATIVE_ATOMIC_XCHG +static inline uint32_t p_atomic_xchg_32(uint32_t *v, uint32_t i) +{ + uint32_t actual = p_atomic_read(v); + uint32_t expected; + do { + expected = actual; + actual = p_atomic_cmpxchg(v, expected, i); + } while (expected != actual); + return actual; +} + +static inline uint64_t p_atomic_xchg_64(uint64_t *v, uint64_t i) +{ + uint64_t actual = p_atomic_read(v); + uint64_t expected; + do { + expected = actual; + actual = p_atomic_cmpxchg(v, expected, i); + } while (expected != actual); + return actual; +} + +#define p_atomic_xchg(v, i) (__typeof(*(v)))( \ + sizeof(*(v)) == sizeof(uint32_t) ? p_atomic_xchg_32((uint32_t *)(v), (uint32_t)(i)) : \ + sizeof(*(v)) == sizeof(uint64_t) ? p_atomic_xchg_64((uint64_t *)(v), (uint64_t)(i)) : \ + (assert(!"should not get here"), 0)) +#endif #endif /* U_ATOMIC_H */