diff options
Diffstat (limited to 'thirdparty/zstd/common/compiler.h')
| -rw-r--r-- | thirdparty/zstd/common/compiler.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/thirdparty/zstd/common/compiler.h b/thirdparty/zstd/common/compiler.h index 1877a0c1d9..95e9483521 100644 --- a/thirdparty/zstd/common/compiler.h +++ b/thirdparty/zstd/common/compiler.h @@ -1,5 +1,5 @@ /* - * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. + * Copyright (c) 2016-2020, Yann Collet, Facebook, Inc. * All rights reserved. * * This source code is licensed under both the BSD-style license (found in the @@ -17,7 +17,7 @@ /* force inlining */ #if !defined(ZSTD_NO_INLINE) -#if defined (__GNUC__) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ +#if (defined(__GNUC__) && !defined(__STRICT_ANSI__)) || defined(__cplusplus) || defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L /* C99 */ # define INLINE_KEYWORD inline #else # define INLINE_KEYWORD @@ -114,6 +114,9 @@ # include <mmintrin.h> /* https://msdn.microsoft.com/fr-fr/library/84szxsww(v=vs.90).aspx */ # define PREFETCH_L1(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T0) # define PREFETCH_L2(ptr) _mm_prefetch((const char*)(ptr), _MM_HINT_T1) +# elif defined(__aarch64__) +# define PREFETCH_L1(ptr) __asm__ __volatile__("prfm pldl1keep, %0" ::"Q"(*(ptr))) +# define PREFETCH_L2(ptr) __asm__ __volatile__("prfm pldl2keep, %0" ::"Q"(*(ptr))) # elif defined(__GNUC__) && ( (__GNUC__ >= 4) || ( (__GNUC__ == 3) && (__GNUC_MINOR__ >= 1) ) ) # define PREFETCH_L1(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 3 /* locality */) # define PREFETCH_L2(ptr) __builtin_prefetch((ptr), 0 /* rw==read */, 2 /* locality */) @@ -136,7 +139,7 @@ /* vectorization * older GCC (pre gcc-4.3 picked as the cutoff) uses a different syntax */ -#if !defined(__clang__) && defined(__GNUC__) +#if !defined(__INTEL_COMPILER) && !defined(__clang__) && defined(__GNUC__) # if (__GNUC__ == 4 && __GNUC_MINOR__ > 3) || (__GNUC__ >= 5) # define DONT_VECTORIZE __attribute__((optimize("no-tree-vectorize"))) # else @@ -146,6 +149,19 @@ # define DONT_VECTORIZE #endif +/* Tell the compiler that a branch is likely or unlikely. + * Only use these macros if it causes the compiler to generate better code. + * If you can remove a LIKELY/UNLIKELY annotation without speed changes in gcc + * and clang, please do. + */ +#if defined(__GNUC__) +#define LIKELY(x) (__builtin_expect((x), 1)) +#define UNLIKELY(x) (__builtin_expect((x), 0)) +#else +#define LIKELY(x) (x) +#define UNLIKELY(x) (x) +#endif + /* disable warnings */ #ifdef _MSC_VER /* Visual Studio */ # include <intrin.h> /* For Visual 2005 */ |