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| author |  Chris Kennelly <ckennelly@google.com> | 2023-10-26 08:43:56 -0700 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2023-10-26 08:44:46 -0700 |
| commit | d59eabb1219bd7c0585e4e86fe9147473c703f33 (patch) | |
| tree | ba28490ed60d3066d61b64e0ba8fdfefc78ac8ba /absl/base/prefetch.h | |
| parent | 4a6ea63d35d28785b87c51536aed00362a94c5f9 (diff) | |
Prefer builtin to inline assembly when built with -mprfchw.
PiperOrigin-RevId: 576884571
Change-Id: I7bfe68e5aedd8563f8e6dbdb5d7cc66e9af22567
Diffstat (limited to 'absl/base/prefetch.h')
| -rw-r--r-- | absl/base/prefetch.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/absl/base/prefetch.h b/absl/base/prefetch.h index 609e26e7..98b3bf96 100644 --- a/absl/base/prefetch.h +++ b/absl/base/prefetch.h @@ -157,7 +157,7 @@ ABSL_ATTRIBUTE_ALWAYS_INLINE inline void PrefetchToLocalCacheForWrite( // unless -march=broadwell or newer; this is not generally the default, so we // manually emit prefetchw. PREFETCHW is recognized as a no-op on older Intel // processors and has been present on AMD processors since the K6-2. -#if defined(__x86_64__) +#if defined(__x86_64__) && !defined(__PRFCHW__) asm("prefetchw %0" : : "m"(*reinterpret_cast<const char*>(addr))); #else __builtin_prefetch(addr, 1, 3); |