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| author |  Greg Falcon <gfalcon@google.com> | 2022-05-18 10:01:14 -0700 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2022-05-18 10:01:57 -0700 |
| commit | 3e04aade4e7a53aebbbed1a1268117f1f522bfb0 (patch) | |
| tree | a474a12423cb60a61e30ec03a3a9970e64ece23e /absl/base | |
| parent | 9df63a8beaae53802109346f0a20328140a7cb8e (diff) | |
Replace direct uses of __builtin_prefetch from SwissTable with the wrapper functions.
Add a new (internal) feature test macro to detect whether the wrappers are no-ops on a given platform.
Note that one-arg __builtin_prefetch(x) is equivalent to __builtin_prefetch(x, 0, 3), per `man BUILTIN_PREFETCH(3)` and gcc docs.
PiperOrigin-RevId: 449508660
Change-Id: I144e750205eec0c956d8dd62bc72e10bdb87c4f7
Diffstat (limited to 'absl/base')
| -rw-r--r-- | absl/base/internal/prefetch.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/absl/base/internal/prefetch.h b/absl/base/internal/prefetch.h index a71b3897..d4971a68 100644 --- a/absl/base/internal/prefetch.h +++ b/absl/base/internal/prefetch.h @@ -72,6 +72,8 @@ void PrefetchNta(const void* addr); #if ABSL_HAVE_BUILTIN(__builtin_prefetch) || defined(__GNUC__) +#define ABSL_INTERNAL_HAVE_PREFETCH 1 + // See __builtin_prefetch: // https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html. // |