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 #  define VLC_MMX __attribute__ ((__target__ ("mmx")))
  54 # endif
  55
  56 # if defined (__SSE__)
  57 #  define vlc_CPU_MMXEXT() (1)
  58 #  define vlc_CPU_SSE() (1)
  59 #  define VLC_SSE
  60 # else
  61 #  define vlc_CPU_MMXEXT() ((vlc_CPU() & VLC_CPU_MMXEXT) != 0)
  62 #  define vlc_CPU_SSE() ((vlc_CPU() & VLC_CPU_SSE) != 0)
  63 #  define VLC_SSE __attribute__ ((__target__ ("sse")))
  64 # endif
  65
  66 # ifdef __SSE2__
  67 #  define vlc_CPU_SSE2() (1)
  68 # else
  69 #  define vlc_CPU_SSE2() ((vlc_CPU() & VLC_CPU_SSE2) != 0)
  70 # endif
  71
  72 # ifdef __SSE3__
  73 #  define vlc_CPU_SSE3() (1)
  74 # else
  75 #  define vlc_CPU_SSE3() ((vlc_CPU() & VLC_CPU_SSE3) != 0)
  76 # endif
  77
  78 # ifdef __SSSE3__
  79 #  define vlc_CPU_SSSE3() (1)
  80 # else
  81 #  define vlc_CPU_SSSE3() ((vlc_CPU() & VLC_CPU_SSSE3) != 0)
  82 # endif
  83
  84 # ifdef __SSE4_1__
  85 #  define vlc_CPU_SSE4_1() (1)
  86 # else
  87 #  define vlc_CPU_SSE4_1() ((vlc_CPU() & VLC_CPU_SSE4_1) != 0)
  88 # endif
  89
  90 # ifdef __SSE4_2__
  91 #  define vlc_CPU_SSE4_2() (1)
  92 # else
  93 #  define vlc_CPU_SSE4_2() ((vlc_CPU() & VLC_CPU_SSE4_2) != 0)
  94 # endif
  95
  96 # ifdef __SSE4A__
  97 #  define vlc_CPU_SSE4A() (1)
  98 # else
  99 #  define vlc_CPU_SSE4A() ((vlc_CPU() & VLC_CPU_SSE4A) != 0)
 100 # endif
 101
 102 # ifdef __AVX__
 103 #  define vlc_CPU_AVX() (1)
 104 # else
 105 #  define vlc_CPU_AVX() ((vlc_CPU() & VLC_CPU_AVX) != 0)
 106 # endif
 107
 108 # ifdef __AVX2__
 109 #  define vlc_CPU_AVX2() (1)
 110 # else
 111 #  define vlc_CPU_AVX2() ((vlc_CPU() & VLC_CPU_AVX2) != 0)
 112 # endif
 113
 114 # ifdef __3dNOW__
 115 #  define vlc_CPU_3dNOW() (1)
 116 # else
 117 #  define vlc_CPU_3dNOW() ((vlc_CPU() & VLC_CPU_3dNOW) != 0)
 118 # endif
 119
 120 # ifdef __XOP__
 121 #  define vlc_CPU_XOP() (1)
 122 # else
 123 #  define vlc_CPU_XOP() ((vlc_CPU() & VLC_CPU_XOP) != 0)
 124 # endif
 125
 126 # ifdef __FMA4__
 127 #  define vlc_CPU_FMA4() (1)
 128 # else
 129 #  define vlc_CPU_FMA4() ((vlc_CPU() & VLC_CPU_FMA4) != 0)
 130 # endif
 131
 132 # elif defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__)
 133 #  define HAVE_FPU 1
 134 #  define VLC_CPU_ALTIVEC 2
 135
 136 #  ifdef ALTIVEC
 137 #   define vlc_CPU_ALTIVEC() (1)
 138 #  else
 139 #   define vlc_CPU_ALTIVEC() ((vlc_CPU() & VLC_CPU_ALTIVEC) != 0)
 140 #  endif
 141
 142 # elif defined (__arm__)
 143 #  if defined (__VFP_FP__) && !defined (__SOFTFP__)
 144 #   define HAVE_FPU 1
 145 #  else
 146 #   define HAVE_FPU 0
 147 #  endif
 148 #  define VLC_CPU_ARMv6    4
 149 #  define VLC_CPU_ARM_NEON 2
 150
 151 #  if defined (__ARM_ARCH_7A__)
 152 #   define VLC_CPU_ARM_ARCH 7
 153 #  elif defined (__ARM_ARCH_6__) || defined (__ARM_ARCH_6T2__)
 154 #   define VLC_CPU_ARM_ARCH 6
 155 #  else
 156 #   define VLC_CPU_ARM_ARCH 4
 157 #  endif
 158
 159 #  if (VLC_CPU_ARM_ARCH >= 6)
 160 #   define vlc_CPU_ARMv6() (1)
 161 #  else
 162 #   define vlc_CPU_ARMv6() ((vlc_CPU() & VLC_CPU_ARMv6) != 0)
 163 #  endif
 164
 165 #  ifdef __ARM_NEON__
 166 #   define vlc_CPU_ARM_NEON() (1)
 167 #  else
 168 #   define vlc_CPU_ARM_NEON() ((vlc_CPU() & VLC_CPU_ARM_NEON) != 0)
 169 #  endif
 170
 171 # elif defined (__aarch64__)
 172 #  define HAVE_FPU 1
 173 // NEON is mandatory for general purpose ARMv8-a CPUs
 174 #  define vlc_CPU_ARM64_NEON() (1)
 175
 176 # elif defined (__sparc__)
 177 #  define HAVE_FPU 1
 178
 179 # elif defined (__mips_hard_float)
 180 #  define HAVE_FPU 1
 181
 182 # else
 183 /**
 184  * Are single precision floating point operations "fast"?
 185  * If this preprocessor constant is zero, floating point should be avoided
 186  * (especially relevant for audio codecs).
 187  */
 188 #  define HAVE_FPU 0
 189
 190 # endif
 191
 192 #endif /* !VLC_CPU_H */