include/vlc_cpu.h

   1 /*****************************************************************************
   2  * vlc_cpu.h: CPU capabilities
   3  *****************************************************************************
   4  * Copyright (C) 1998-2009 VLC authors and VideoLAN
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 /**
  22  * \file
  23  * This file provides CPU features detection.
  24  */
  25
  26 #ifndef VLC_CPU_H
  27 # define VLC_CPU_H 1
  28
  29 VLC_API unsigned vlc_CPU(void);
  30
  31 # if defined (__i386__) || defined (__x86_64__)
  32 #  define HAVE_FPU 1
  33 #  define VLC_CPU_MMX    0x00000008
  34 #  define VLC_CPU_3dNOW  0x00000010
  35 #  define VLC_CPU_MMXEXT 0x00000020
  36 #  define VLC_CPU_SSE    0x00000040
  37 #  define VLC_CPU_SSE2   0x00000080
  38 #  define VLC_CPU_SSE3   0x00000100
  39 #  define VLC_CPU_SSSE3  0x00000200
  40 #  define VLC_CPU_SSE4_1 0x00000400
  41 #  define VLC_CPU_SSE4_2 0x00000800
  42 #  define VLC_CPU_SSE4A  0x00001000
  43 #  define VLC_CPU_AVX    0x00002000
  44 #  define VLC_CPU_AVX2   0x00004000
  45 #  define VLC_CPU_XOP    0x00008000
  46 #  define VLC_CPU_FMA4   0x00010000
  47
  48 # if defined (__MMX__)
  49 #  define vlc_CPU_MMX() (1)
  50 #  define VLC_MMX
  51 # else
  52 #  define vlc_CPU_MMX() ((vlc_CPU() & VLC_CPU_MMX) != 0)
  53 #  if VLC_GCC_VERSION(4, 4) || defined(__clang__)
  54 #   define VLC_MMX __attribute__ ((__target__ ("mmx")))
  55 #  else
  56 #   define VLC_MMX VLC_MMX_is_not_implemented_on_this_compiler
  57 #  endif
  58 # endif
  59
  60 # if defined (__SSE__)
  61 #  define vlc_CPU_MMXEXT() (1)
  62 #  define vlc_CPU_SSE() (1)
  63 #  define VLC_SSE
  64 # else
  65 #  define vlc_CPU_MMXEXT() ((vlc_CPU() & VLC_CPU_MMXEXT) != 0)
  66 #  define vlc_CPU_SSE() ((vlc_CPU() & VLC_CPU_SSE) != 0)
  67 #  if VLC_GCC_VERSION(4, 4) || defined(__clang__)
  68 #   define VLC_SSE __attribute__ ((__target__ ("sse")))
  69 #  else
  70 #   define VLC_SSE VLC_SSE_is_not_implemented_on_this_compiler
  71 #  endif
  72 # endif
  73
  74 # ifdef __SSE2__
  75 #  define vlc_CPU_SSE2() (1)
  76 # else
  77 #  define vlc_CPU_SSE2() ((vlc_CPU() & VLC_CPU_SSE2) != 0)
  78 # endif
  79
  80 # ifdef __SSE3__
  81 #  define vlc_CPU_SSE3() (1)
  82 # else
  83 #  define vlc_CPU_SSE3() ((vlc_CPU() & VLC_CPU_SSE3) != 0)
  84 # endif
  85
  86 # ifdef __SSSE3__
  87 #  define vlc_CPU_SSSE3() (1)
  88 # else
  89 #  define vlc_CPU_SSSE3() ((vlc_CPU() & VLC_CPU_SSSE3) != 0)
  90 # endif
  91
  92 # ifdef __SSE4_1__
  93 #  define vlc_CPU_SSE4_1() (1)
  94 # else
  95 #  define vlc_CPU_SSE4_1() ((vlc_CPU() & VLC_CPU_SSE4_1) != 0)
  96 # endif
  97
  98 # ifdef __SSE4_2__
  99 #  define vlc_CPU_SSE4_2() (1)
 100 # else
 101 #  define vlc_CPU_SSE4_2() ((vlc_CPU() & VLC_CPU_SSE4_2) != 0)
 102 # endif
 103
 104 # ifdef __SSE4A__
 105 #  define vlc_CPU_SSE4A() (1)
 106 # else
 107 #  define vlc_CPU_SSE4A() ((vlc_CPU() & VLC_CPU_SSE4A) != 0)
 108 # endif
 109
 110 # ifdef __AVX__
 111 #  define vlc_CPU_AVX() (1)
 112 # else
 113 #  define vlc_CPU_AVX() ((vlc_CPU() & VLC_CPU_AVX) != 0)
 114 # endif
 115
 116 # ifdef __AVX2__
 117 #  define vlc_CPU_AVX2() (1)
 118 # else
 119 #  define vlc_CPU_AVX2() ((vlc_CPU() & VLC_CPU_AVX2) != 0)
 120 # endif
 121
 122 # ifdef __3dNOW__
 123 #  define vlc_CPU_3dNOW() (1)
 124 # else
 125 #  define vlc_CPU_3dNOW() ((vlc_CPU() & VLC_CPU_3dNOW) != 0)
 126 # endif
 127
 128 # ifdef __XOP__
 129 #  define vlc_CPU_XOP() (1)
 130 # else
 131 #  define vlc_CPU_XOP() ((vlc_CPU() & VLC_CPU_XOP) != 0)
 132 # endif
 133
 134 # ifdef __FMA4__
 135 #  define vlc_CPU_FMA4() (1)
 136 # else
 137 #  define vlc_CPU_FMA4() ((vlc_CPU() & VLC_CPU_FMA4) != 0)
 138 # endif
 139
 140 # elif defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__)
 141 #  define HAVE_FPU 1
 142 #  define VLC_CPU_ALTIVEC 2
 143
 144 #  ifdef ALTIVEC
 145 #   define vlc_CPU_ALTIVEC() (1)
 146 #  else
 147 #   define vlc_CPU_ALTIVEC() ((vlc_CPU() & VLC_CPU_ALTIVEC) != 0)
 148 #  endif
 149
 150 # elif defined (__arm__)
 151 #  if defined (__VFP_FP__) && !defined (__SOFTFP__)
 152 #   define HAVE_FPU 1
 153 #  else
 154 #   define HAVE_FPU 0
 155 #  endif
 156 #  define VLC_CPU_ARMv6    4
 157 #  define VLC_CPU_ARM_NEON 2
 158
 159 #  if defined (__ARM_ARCH_7A__)
 160 #   define VLC_CPU_ARM_ARCH 7
 161 #  elif defined (__ARM_ARCH_6__) || defined (__ARM_ARCH_6T2__)
 162 #   define VLC_CPU_ARM_ARCH 6
 163 #  else
 164 #   define VLC_CPU_ARM_ARCH 4
 165 #  endif
 166
 167 #  if (VLC_CPU_ARM_ARCH >= 6)
 168 #   define vlc_CPU_ARMv6() (1)
 169 #  else
 170 #   define vlc_CPU_ARMv6() ((vlc_CPU() & VLC_CPU_ARMv6) != 0)
 171 #  endif
 172
 173 #  ifdef __ARM_NEON__
 174 #   define vlc_CPU_ARM_NEON() (1)
 175 #  else
 176 #   define vlc_CPU_ARM_NEON() ((vlc_CPU() & VLC_CPU_ARM_NEON) != 0)
 177 #  endif
 178
 179 # elif defined (__aarch64__)
 180 #  define HAVE_FPU 1
 181
 182 # elif defined (__sparc__)
 183 #  define HAVE_FPU 1
 184
 185 # elif defined (__mips_hard_float)
 186 #  define HAVE_FPU 1
 187
 188 # else
 189 /**
 190  * Are single precision floating point operations "fast"?
 191  * If this preprocessor constant is zero, floating point should be avoided
 192  * (especially relevant for audio codecs).
 193  */
 194 #  define HAVE_FPU 0
 195
 196 # endif
 197
 198 #endif /* !VLC_CPU_H */