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| author | Jonathan Wakely <jwakely@redhat.com> | 2021-11-05 12:18:52 +0000 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2021-11-05 18:14:41 +0000 |
| commit | 2627e3b7fd820876bc45c99be48aea05351d210a (patch) | |
| tree | 1fab1db80af6d878a2976fbf0d65f63e6063d172 | |
| parent | 5997e6a6ecc4bf9ed73c213693cd6127c16a2419 (diff) | |
| download | gcc-2627e3b7fd820876bc45c99be48aea05351d210a.zip gcc-2627e3b7fd820876bc45c99be48aea05351d210a.tar.gz gcc-2627e3b7fd820876bc45c99be48aea05351d210a.tar.bz2 | |
libstdc++: Add [[unlikely]] attributes to std::random_device routines
libstdc++-v3/ChangeLog:
* src/c++11/random.cc (__x86_rdrand, __x86_rdseed): Add
[[unlikely]] attribute.
| -rw-r--r-- | libstdc++-v3/src/c++11/random.cc | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libstdc++-v3/src/c++11/random.cc b/libstdc++-v3/src/c++11/random.cc index 55a73c5..4b88818 100644 --- a/libstdc++-v3/src/c++11/random.cc +++ b/libstdc++-v3/src/c++11/random.cc @@ -97,7 +97,7 @@ namespace std _GLIBCXX_VISIBILITY(default) unsigned int retries = 100; unsigned int val; - while (__builtin_ia32_rdrand32_step(&val) == 0) + while (__builtin_ia32_rdrand32_step(&val) == 0) [[__unlikely__]] if (--retries == 0) std::__throw_runtime_error(__N("random_device: rdrand failed")); @@ -113,7 +113,7 @@ namespace std _GLIBCXX_VISIBILITY(default) unsigned int retries = 100; unsigned int val; - while (__builtin_ia32_rdseed_si_step(&val) == 0) + while (__builtin_ia32_rdseed_si_step(&val) == 0) [[__unlikely__]] { if (--retries == 0) { |