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-rw-r--r--absl/base/prefetch.h2
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);