Merge pull request #1659 from hjelmn/sync_64
sync_builtin: check for 64-bit atomic support
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Коммит
f6938868bd
@ -95,6 +95,24 @@ __sync_add_and_fetch(&tmp, 1);],
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$1],
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[AC_MSG_RESULT([no])
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$2])
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AC_MSG_CHECKING([for 64-bit __sync builtin atomics])
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AC_TRY_LINK([
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#include <stdint.h>
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uint64_t tmp;], [
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__sync_bool_compare_and_swap(&tmp, 0, 1);
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__sync_add_and_fetch(&tmp, 1);],
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[AC_MSG_RESULT([yes])
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opal_asm_sync_have_64bit=1],
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[AC_MSG_RESULT([no])
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opal_asm_sync_have_64bit=0])
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AC_DEFINE_UNQUOTED([OPAL_ASM_SYNC_HAVE_64BIT],[$opal_asm_sync_have_64bit],
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[Whether 64-bit is supported by the __sync builtin atomics])
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# Check for 128-bit support
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OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128
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])
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@ -878,7 +896,6 @@ AC_DEFUN([OPAL_CONFIG_ASM],[
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opal_cv_asm_builtin="BUILTIN_NO"
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if test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_builtin_atomics" = "yes" ; then
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OPAL_CHECK_SYNC_BUILTINS([opal_cv_asm_builtin="BUILTIN_SYNC"], [])
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OPAL_CHECK_SYNC_BUILTIN_CSWAP_INT128
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fi
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if test "$opal_cv_asm_builtin" = "BUILTIN_NO" && test "$enable_osx_builtin_atomics" = "yes" ; then
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AC_CHECK_HEADER([libkern/OSAtomic.h],
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@ -1009,6 +1026,12 @@ AC_MSG_ERROR([Can not continue.])
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;;
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esac
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if test "x$OPAL_ASM_SUPPORT_64BIT" = "x1" && test "$opal_cv_asm_builtin" = "BUILTIN_SYNC" &&
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test "$opal_asm_sync_have_64bit" = "0" ; then
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# __sync builtins exist but do not implement 64-bit support. Fall back on inline asm.
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opal_cv_asm_builtin="BUILTIN_NO"
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fi
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if test "$opal_cv_asm_builtin" = "BUILTIN_SYNC" ; then
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AC_DEFINE([OPAL_C_GCC_INLINE_ASSEMBLY], [1],
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[Whether C compiler supports GCC style inline assembly])
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@ -11,7 +11,7 @@
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2011 Sandia National Laboratories. All rights reserved.
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* Copyright (c) 2014 Los Alamos National Security, LLC. All rights
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* Copyright (c) 2014-2016 Los Alamos National Security, LLC. All rights
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* reserved.
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* $COPYRIGHT$
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*
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@ -86,6 +86,8 @@ static inline int32_t opal_atomic_sub_32(volatile int32_t *addr, int32_t delta)
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return __sync_sub_and_fetch(addr, delta);
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}
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#if OPAL_ASM_SYNC_HAVE_64BIT
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#define OPAL_HAVE_ATOMIC_CMPSET_64 1
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static inline int opal_atomic_cmpset_acq_64( volatile int64_t *addr,
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int64_t oldval, int64_t newval)
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@ -105,17 +107,6 @@ static inline int opal_atomic_cmpset_64( volatile int64_t *addr,
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return __sync_bool_compare_and_swap(addr, oldval, newval);
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}
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#if OPAL_HAVE_SYNC_BUILTIN_CSWAP_INT128
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static inline int opal_atomic_cmpset_128 (volatile opal_int128_t *addr,
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opal_int128_t oldval, opal_int128_t newval)
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{
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return __sync_bool_compare_and_swap(addr, oldval, newval);
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}
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#define OPAL_HAVE_ATOMIC_CMPSET_128 1
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#endif
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#define OPAL_HAVE_ATOMIC_MATH_64 1
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#define OPAL_HAVE_ATOMIC_ADD_64 1
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static inline int64_t opal_atomic_add_64(volatile int64_t *addr, int64_t delta)
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@ -129,4 +120,17 @@ static inline int64_t opal_atomic_sub_64(volatile int64_t *addr, int64_t delta)
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return __sync_sub_and_fetch(addr, delta);
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}
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#endif
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#if OPAL_HAVE_SYNC_BUILTIN_CSWAP_INT128
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static inline int opal_atomic_cmpset_128 (volatile opal_int128_t *addr,
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opal_int128_t oldval, opal_int128_t newval)
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{
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return __sync_bool_compare_and_swap(addr, oldval, newval);
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}
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#define OPAL_HAVE_ATOMIC_CMPSET_128 1
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#endif
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#endif /* ! OPAL_SYS_ARCH_ATOMIC_H */
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