1 /*****************************************************************************
2 * vlc_cpu.h: CPU capabilities
3 *****************************************************************************
4 * Copyright (C) 1998-2009 VLC authors and VideoLAN
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.
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.
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 *****************************************************************************/
23 * This file provides CPU features detection.
29 VLC_API unsigned vlc_CPU(void);
31 # if defined (__i386__) || defined (__x86_64__)
33 # define CPU_CAPABILITY_MMX (1<<3)
34 # define CPU_CAPABILITY_3DNOW (1<<4)
35 # define CPU_CAPABILITY_MMXEXT (1<<5)
36 # define CPU_CAPABILITY_SSE (1<<6)
37 # define CPU_CAPABILITY_SSE2 (1<<7)
38 # define CPU_CAPABILITY_SSE3 (1<<8)
39 # define CPU_CAPABILITY_SSSE3 (1<<9)
40 # define CPU_CAPABILITY_SSE4_1 (1<<10)
41 # define CPU_CAPABILITY_SSE4_2 (1<<11)
42 # define CPU_CAPABILITY_SSE4A (1<<12)
44 # if defined (__MMX__)
46 # elif VLC_GCC_VERSION(4, 4)
47 # define VLC_MMX __attribute__ ((__target__ ("mmx")))
49 # define VLC_MMX VLC_MMX_is_not_implemented_on_this_compiler
52 # if defined (__SSE__)
54 # elif VLC_GCC_VERSION(4, 4)
55 # define VLC_SSE __attribute__ ((__target__ ("sse")))
57 # define VLC_SSE VLC_SSE_is_not_implemented_on_this_compiler
60 # elif defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__)
62 # define VLC_CPU_ALTIVEC 2
65 # define vlc_CPU_ALTIVEC() (1)
67 # define vlc_CPU_ALTIVEC() ((vlc_CPU() & VLC_CPU_ALTIVEC) != 0)
70 # elif defined (__arm__)
71 # if defined (__VFP_FP__) && !defined (__SOFTFP__)
76 # define VLC_CPU_ARM_NEON 2
79 # define vlc_CPU_ARM_NEON() (1)
81 # define vlc_CPU_ARM_NEON() ((vlc_CPU() & VLC_CPU_ARM_NEON) != 0)
84 # elif defined (__sparc__)
89 * Are single precision floating point operations "fast"?
90 * If this preprocessor constant is zero, floating point should be avoided
91 * (especially relevant for audio codecs).
97 #endif /* !VLC_CPU_H */