AuroraMiddleware/zstd
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Merge pull request #1139 from fbrosson/prefetch

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__builtin_prefetch did probably not exist before gcc 3.1.
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Yann Collet 2018-05-18 13:23:35 -07:00 committed by GitHub
commit 44303428c6
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lib/common/compiler.h
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@ -92,7 +92,7 @@
#if defined(_MSC_VER) && (defined(_M_X64) || defined(_M_I86)) /* _mm_prefetch() is not defined outside of x86/x64 */
# include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */
# define PREFETCH(ptr) _mm_prefetch((const char*)ptr, _MM_HINT_T0)
#elif defined(__GNUC__)
#elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) )
# define PREFETCH(ptr) __builtin_prefetch(ptr, 0, 0)
#else
# define PREFETCH(ptr) /* disabled */