From d41cb63ff4d114d856837fbf61ba2872c5076ac2 Mon Sep 17 00:00:00 2001 From: Noah Misch Date: Sun, 11 Oct 2020 21:31:37 -0700 Subject: [PATCH] For ppc gcc, implement 64-bit compare_exchange and fetch_add with asm. While xlc defines __64BIT__, gcc does not. Due to this oversight in commit 30ee5d17c20dbb282a9952b3048d6ad52d56c371, gcc builds continued implementing 64-bit atomics by way of intrinsics. Back-patch to v13, where that commit first appeared. Reviewed by Tom Lane. Discussion: https://postgr.es/m/20201011051043.GA1724101@rfd.leadboat.com --- src/include/port/atomics/arch-ppc.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/include/port/atomics/arch-ppc.h b/src/include/port/atomics/arch-ppc.h index fdfe0d0cd5f..68e66033ad7 100644 --- a/src/include/port/atomics/arch-ppc.h +++ b/src/include/port/atomics/arch-ppc.h @@ -32,14 +32,14 @@ typedef struct pg_atomic_uint32 } pg_atomic_uint32; /* 64bit atomics are only supported in 64bit mode */ -#ifdef __64BIT__ +#if SIZEOF_VOID_P >= 8 #define PG_HAVE_ATOMIC_U64_SUPPORT typedef struct pg_atomic_uint64 { volatile uint64 value pg_attribute_aligned(8); } pg_atomic_uint64; -#endif /* __64BIT__ */ +#endif /* * This mimics gcc __atomic_compare_exchange_n(..., __ATOMIC_SEQ_CST), but