diff options
Diffstat (limited to 'src/include/port/atomics/generic-acc.h')
| -rw-r--r-- | src/include/port/atomics/generic-acc.h | 45 |
1 files changed, 24 insertions, 21 deletions
diff --git a/src/include/port/atomics/generic-acc.h b/src/include/port/atomics/generic-acc.h index c5639aadda..e16cc6f7dc 100644 --- a/src/include/port/atomics/generic-acc.h +++ b/src/include/port/atomics/generic-acc.h @@ -10,9 +10,9 @@ * * Documentation: * * inline assembly for Itanium-based HP-UX: - * http://h21007.www2.hp.com/portal/download/files/unprot/Itanium/inline_assem_ERS.pdf + * http://h21007.www2.hp.com/portal/download/files/unprot/Itanium/inline_assem_ERS.pdf * * Implementing Spinlocks on the Intel (R) Itanium (R) Architecture and PA-RISC - * http://h21007.www2.hp.com/portal/download/files/unprot/itanium/spinlocks.pdf + * http://h21007.www2.hp.com/portal/download/files/unprot/itanium/spinlocks.pdf * * Itanium only supports a small set of numbers (6, -8, -4, -1, 1, 4, 8, 16) * for atomic add/sub, so we just implement everything but compare_exchange @@ -49,7 +49,7 @@ typedef struct pg_atomic_uint64 volatile uint64 value; } pg_atomic_uint64; -#endif /* defined(HAVE_ATOMICS) */ +#endif /* defined(HAVE_ATOMICS) */ #if defined(PG_USE_INLINE) || defined(ATOMICS_INCLUDE_DEFINITIONS) @@ -64,23 +64,25 @@ STATIC_IF_INLINE bool pg_atomic_compare_exchange_u32_impl(volatile pg_atomic_uint32 *ptr, uint32 *expected, uint32 newval) { - bool ret; - uint32 current; + bool ret; + uint32 current; _Asm_mov_to_ar(_AREG_CCV, *expected, MINOR_FENCE); + /* * We want a barrier, not just release/acquire semantics. */ _Asm_mf(); + /* - * Notes: - * DOWN_MEM_FENCE | _UP_MEM_FENCE prevents reordering by the compiler + * Notes: DOWN_MEM_FENCE | _UP_MEM_FENCE prevents reordering by the + * compiler */ - current = _Asm_cmpxchg(_SZ_W, /* word */ - _SEM_REL, - &ptr->value, - newval, _LDHINT_NONE, - _DOWN_MEM_FENCE | _UP_MEM_FENCE); + current = _Asm_cmpxchg(_SZ_W, /* word */ + _SEM_REL, + &ptr->value, + newval, _LDHINT_NONE, + _DOWN_MEM_FENCE | _UP_MEM_FENCE); ret = current == *expected; *expected = current; return ret; @@ -92,16 +94,16 @@ STATIC_IF_INLINE bool pg_atomic_compare_exchange_u64_impl(volatile pg_atomic_uint64 *ptr, uint64 *expected, uint64 newval) { - bool ret; - uint64 current; + bool ret; + uint64 current; _Asm_mov_to_ar(_AREG_CCV, *expected, MINOR_FENCE); _Asm_mf(); - current = _Asm_cmpxchg(_SZ_D, /* doubleword */ - _SEM_REL, - &ptr->value, - newval, _LDHINT_NONE, - _DOWN_MEM_FENCE | _UP_MEM_FENCE); + current = _Asm_cmpxchg(_SZ_D, /* doubleword */ + _SEM_REL, + &ptr->value, + newval, _LDHINT_NONE, + _DOWN_MEM_FENCE | _UP_MEM_FENCE); ret = current == *expected; *expected = current; return ret; @@ -109,6 +111,7 @@ pg_atomic_compare_exchange_u64_impl(volatile pg_atomic_uint64 *ptr, #undef MINOR_FENCE -#endif /* defined(HAVE_ATOMICS) */ +#endif /* defined(HAVE_ATOMICS) */ -#endif /* defined(PG_USE_INLINE) || defined(ATOMICS_INCLUDE_DEFINITIONS) */ +#endif /* defined(PG_USE_INLINE) || + * defined(ATOMICS_INCLUDE_DEFINITIONS) */ |