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 /**
  30  * Retrieves CPU capability flags.
  31  */
  32 VLC_API unsigned vlc_CPU(void);
  33
  34 /**
  35  * Computes CPU capability flags.
  36  *
  37  * Do not call this function directly.
  38  * Call vlc_CPU() instead, which caches the correct value.
  39  */
  40 unsigned vlc_CPU_raw(void);
  41
  42 # if defined (__i386__) || defined (__x86_64__)
  43 #  define HAVE_FPU 1
  44 #  define VLC_CPU_MMX    0x00000008
  45 #  define VLC_CPU_3dNOW  0x00000010
  46 #  define VLC_CPU_MMXEXT 0x00000020
  47 #  define VLC_CPU_SSE    0x00000040
  48 #  define VLC_CPU_SSE2   0x00000080
  49 #  define VLC_CPU_SSE3   0x00000100
  50 #  define VLC_CPU_SSSE3  0x00000200
  51 #  define VLC_CPU_SSE4_1 0x00000400
  52 #  define VLC_CPU_SSE4_2 0x00000800
  53 #  define VLC_CPU_SSE4A  0x00001000
  54 #  define VLC_CPU_AVX    0x00002000
  55 #  define VLC_CPU_AVX2   0x00004000
  56 #  define VLC_CPU_XOP    0x00008000
  57 #  define VLC_CPU_FMA4   0x00010000
  58
  59 # if defined (__MMX__)
  60 #  define vlc_CPU_MMX() (1)
  61 #  define VLC_MMX
  62 # else
  63 #  define vlc_CPU_MMX() ((vlc_CPU() & VLC_CPU_MMX) != 0)
  64 #  define VLC_MMX __attribute__ ((__target__ ("mmx")))
  65 # endif
  66
  67 # if defined (__SSE__)
  68 #  define vlc_CPU_MMXEXT() (1)
  69 #  define vlc_CPU_SSE() (1)
  70 #  define VLC_SSE
  71 # else
  72 #  define vlc_CPU_MMXEXT() ((vlc_CPU() & VLC_CPU_MMXEXT) != 0)
  73 #  define vlc_CPU_SSE() ((vlc_CPU() & VLC_CPU_SSE) != 0)
  74 #  define VLC_SSE __attribute__ ((__target__ ("sse")))
  75 # endif
  76
  77 # ifdef __SSE2__
  78 #  define vlc_CPU_SSE2() (1)
  79 # else
  80 #  define vlc_CPU_SSE2() ((vlc_CPU() & VLC_CPU_SSE2) != 0)
  81 # endif
  82
  83 # ifdef __SSE3__
  84 #  define vlc_CPU_SSE3() (1)
  85 # else
  86 #  define vlc_CPU_SSE3() ((vlc_CPU() & VLC_CPU_SSE3) != 0)
  87 # endif
  88
  89 # ifdef __SSSE3__
  90 #  define vlc_CPU_SSSE3() (1)
  91 # else
  92 #  define vlc_CPU_SSSE3() ((vlc_CPU() & VLC_CPU_SSSE3) != 0)
  93 # endif
  94
  95 # ifdef __SSE4_1__
  96 #  define vlc_CPU_SSE4_1() (1)
  97 # else
  98 #  define vlc_CPU_SSE4_1() ((vlc_CPU() & VLC_CPU_SSE4_1) != 0)
  99 # endif
 100
 101 # ifdef __SSE4_2__
 102 #  define vlc_CPU_SSE4_2() (1)
 103 # else
 104 #  define vlc_CPU_SSE4_2() ((vlc_CPU() & VLC_CPU_SSE4_2) != 0)
 105 # endif
 106
 107 # ifdef __SSE4A__
 108 #  define vlc_CPU_SSE4A() (1)
 109 # else
 110 #  define vlc_CPU_SSE4A() ((vlc_CPU() & VLC_CPU_SSE4A) != 0)
 111 # endif
 112
 113 # ifdef __AVX__
 114 #  define vlc_CPU_AVX() (1)
 115 # else
 116 #  define vlc_CPU_AVX() ((vlc_CPU() & VLC_CPU_AVX) != 0)
 117 # endif
 118
 119 # ifdef __AVX2__
 120 #  define vlc_CPU_AVX2() (1)
 121 # else
 122 #  define vlc_CPU_AVX2() ((vlc_CPU() & VLC_CPU_AVX2) != 0)
 123 # endif
 124
 125 # ifdef __3dNOW__
 126 #  define vlc_CPU_3dNOW() (1)
 127 # else
 128 #  define vlc_CPU_3dNOW() ((vlc_CPU() & VLC_CPU_3dNOW) != 0)
 129 # endif
 130
 131 # ifdef __XOP__
 132 #  define vlc_CPU_XOP() (1)
 133 # else
 134 #  define vlc_CPU_XOP() ((vlc_CPU() & VLC_CPU_XOP) != 0)
 135 # endif
 136
 137 # ifdef __FMA4__
 138 #  define vlc_CPU_FMA4() (1)
 139 # else
 140 #  define vlc_CPU_FMA4() ((vlc_CPU() & VLC_CPU_FMA4) != 0)
 141 # endif
 142
 143 # elif defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__)
 144 #  define HAVE_FPU 1
 145 #  define VLC_CPU_ALTIVEC 2
 146
 147 #  ifdef ALTIVEC
 148 #   define vlc_CPU_ALTIVEC() (1)
 149 #  else
 150 #   define vlc_CPU_ALTIVEC() ((vlc_CPU() & VLC_CPU_ALTIVEC) != 0)
 151 #  endif
 152
 153 # elif defined (__arm__)
 154 #  if defined (__VFP_FP__) && !defined (__SOFTFP__)
 155 #   define HAVE_FPU 1
 156 #  else
 157 #   define HAVE_FPU 0
 158 #  endif
 159 #  define VLC_CPU_ARMv6    4
 160 #  define VLC_CPU_ARM_NEON 2
 161
 162 #  if defined (__ARM_ARCH_7A__)
 163 #   define VLC_CPU_ARM_ARCH 7
 164 #  elif defined (__ARM_ARCH_6__) || defined (__ARM_ARCH_6T2__)
 165 #   define VLC_CPU_ARM_ARCH 6
 166 #  else
 167 #   define VLC_CPU_ARM_ARCH 4
 168 #  endif
 169
 170 #  if (VLC_CPU_ARM_ARCH >= 6)
 171 #   define vlc_CPU_ARMv6() (1)
 172 #  else
 173 #   define vlc_CPU_ARMv6() ((vlc_CPU() & VLC_CPU_ARMv6) != 0)
 174 #  endif
 175
 176 #  ifdef __ARM_NEON__
 177 #   define vlc_CPU_ARM_NEON() (1)
 178 #  else
 179 #   define vlc_CPU_ARM_NEON() ((vlc_CPU() & VLC_CPU_ARM_NEON) != 0)
 180 #  endif
 181
 182 # elif defined (__aarch64__)
 183 #  define HAVE_FPU 1
 184 #  define VLC_CPU_ARM_NEON 0x1
 185 #  define VLC_CPU_ARM_SVE  0x2
 186
 187 #  ifdef __ARM_NEON
 188 #   define vlc_CPU_ARM_NEON() (1)
 189 #  else
 190 #   define vlc_CPU_ARM_NEON() ((vlc_CPU() & VLC_CPU_ARM_NEON) != 0)
 191 #  endif
 192
 193 #  ifdef __ARM_FEATURE_SVE
 194 #   define vlc_CPU_ARM_SVE()   (1)
 195 #  else
 196 #   define vlc_CPU_ARM_SVE()   ((vlc_CPU() & VLC_CPU_ARM_SVE) != 0)
 197 #  endif
 198
 199 # elif defined (__sparc__)
 200 #  define HAVE_FPU 1
 201
 202 # elif defined (__mips_hard_float)
 203 #  define HAVE_FPU 1
 204
 205 # else
 206 /**
 207  * Are single precision floating point operations "fast"?
 208  * If this preprocessor constant is zero, floating point should be avoided
 209  * (especially relevant for audio codecs).
 210  */
 211 #  define HAVE_FPU 0
 212
 213 # endif
 214
 215 #endif /* !VLC_CPU_H */