1  /*
  2   * Copyright (C) 2018-2020, Advanced Micro Devices, Inc. All rights reserved.
  3   *
  4   * Redistribution and use in source and binary forms, with or without modification,
  5   * are permitted provided that the following conditions are met:
  6   * 1. Redistributions of source code must retain the above copyright notice,
  7   *    this list of conditions and the following disclaimer.
  8   * 2. Redistributions in binary form must reproduce the above copyright notice,
  9   *    this list of conditions and the following disclaimer in the documentation
 10   *    and/or other materials provided with the distribution.
 11   * 3. Neither the name of the copyright holder nor the names of its contributors
 12   *    may be used to endorse or promote products derived from this software without
 13   *    specific prior written permission.
 14   *
 15   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 16   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 17   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 18   * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 19   * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 20   * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 21   * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 22   * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 23   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 24   * POSSIBILITY OF SUCH DAMAGE.
 25   *
 26   */
 27  
 28  #ifndef __AMD_LIBM_COMPILER_H__
 29  #define __AMD_LIBM_COMPILER_H__
 30  
 31  /*
 32  To check for which OS the code is compiled:
 33  Linux and Linux-derived           __linux__
 34  Android                           __ANDROID__ (implies __linux__)
 35  Linux (non-Android)               __linux__ && !__ANDROID__
 36  Darwin (Mac OS X and iOS)         __APPLE__
 37  Akaros (http://akaros.org)        __ros__
 38  Windows                           _WIN32
 39  Windows 64 bit                    _WIN64 (implies _WIN32)
 40  NaCL                              __native_client__
 41  AsmJS                             __asmjs__
 42  Fuschia                           __Fuchsia__
 43  
 44  
 45  To check which compiler is used:
 46  Visual Studio       _MSC_VER
 47  gcc                 __GNUC__
 48  clang               __clang__
 49  emscripten          __EMSCRIPTEN__ (for asm.js and webassembly)
 50  MinGW 32            __MINGW32__
 51  MinGW-w64 32bit     __MINGW32__
 52  MinGW-w64 64bit     __MINGW64__
 53  
 54  
 55  To check that this is gcc compiler version 5.1 or greater:
 56  #if defined(__GNUC__) && (__GNUC___ > 5 || (__GNUC__ == 5 && __GNUC_MINOR__ >= 1))
 57  // this is gcc 5.1 or greater
 58  #endif
 59  
 60  */
 61  
 62  #if defined(__GNUC__)
 63  
 64  #define PACKED		__attribute__((packed))
 65  
 66  #define PACK_ALIGNED(x) __attribute__((packed, aligned(x)))
 67  #define ALIGN(x)        __attribute__((aligned ((x))))
 68  
 69  #define RODATA          __attribute__((section (".rodata")))
 70  
 71  #define HIDDEN         __attribute__ ((__visibility__ ("hidden")))
 72  #define NOINLINE       __attribute__ ((noinline))
 73  #define likely(x)      __builtin_expect (!!(x), 1)
 74  #define unlikely(x)    __builtin_expect (x, 0)
 75  
 76  
 77  #define strong_alias(aliasname, name)  _strong_alias(aliasname, name)
 78  
 79  #define _strong_alias(al_name, name)					\
 80             extern __typeof (name) al_name __attribute__ ((alias (#name)));
 81  
 82  #define hidden_alias(al_name, name)    \
 83         extern __typeof (name) al_name  \
 84                         __attribute__ ((alias (#al_name), visibility ("hidden")));
 85  
 86  #define OPT_O1 __attribute__((optimize("O1")))
 87  #define OPT_O2 __attribute__((optimize("O2")))
 88  #define OPT_O3 __attribute__((optimize("O3")))
 89  #define OPT_Og __attribute__((optimize("Og")))
 90  
 91  #define OPTIMIZE(x) __attribute__((optimize(x)))
 92  #define NO_OPTIMIZE __attribute__((optimize("0"))
 93  
 94  #define CONSTRUCTOR __attribute__((constructor))
 95  #define INITIALIZER(f) static void f(void) CONSTRUCTOR; static void f(void)
 96  
 97  
 98  #define WEAK_LIBM_ALIAS(x, y)                                   \
 99          asm("\n\t"".weak " STRINGIFY(x)                         \
100              "\n\t"".set " STRINGIFY(x) ", " STRINGIFY(y)        \
101              "\n\t");
102  
103  #if defined(__clang__)
104      #define FALLTHROUGH
105      #undef NO_OPTIMIZE
106      #define NO_OPTIMIZE __attribute__((optnone))
107  #else
108      #define FALLTHROUGH __attribute__((fallthrough))
109      #undef NO_OPTIMIZE
110      #define NO_OPTIMIZE __attribute__((optimize("O0")))
111  #endif
112  
113  #elif defined(__MSVC) && defined(_MSC_VER)
114  #include <intrin.h>
115  #define CPUID __cpuid
116  #define CCALL __cdecl
117  #pragma section(".CRT$XCU",read)
118  #define INITIALIZER(f)  static void __cdecl f(void); __declspec(allocate(".CRT$XCU")) void (__cdecl*f##_)(void) = f; static void __cdecl f(void)
119  
120  
121  #define FALLTHROUGH
122  
123  #endif	/* GCC */
124  
125  #endif	/* AMD_LIBM_COMPILER_H */