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 VLC_CPU_MMX 8
34 # define CPU_CAPABILITY_3DNOW (1<<4)
35 # define VLC_CPU_MMXEXT 32
36 # define VLC_CPU_SSE 64
37 # define VLC_CPU_SSE2 128
38 # define VLC_CPU_SSE3 256
39 # define VLC_CPU_SSSE3 512
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__)
45 # define vlc_CPU_MMX() (1)
48 # define vlc_CPU_MMX() ((vlc_CPU() & VLC_CPU_MMX) != 0)
49 # if VLC_GCC_VERSION(4, 4)
50 # define VLC_MMX __attribute__ ((__target__ ("mmx")))
52 # define VLC_MMX VLC_MMX_is_not_implemented_on_this_compiler
56 # if defined (__SSE__)
57 # define vlc_CPU_MMXEXT() (1)
58 # define vlc_CPU_SSE() (1)
61 # define vlc_CPU_MMXEXT() ((vlc_CPU() & VLC_CPU_MMXEXT) != 0)
62 # define vlc_CPU_SSE() ((vlc_CPU() & VLC_CPU_SSE) != 0)
63 # if VLC_GCC_VERSION(4, 4)
64 # define VLC_SSE __attribute__ ((__target__ ("sse")))
66 # define VLC_SSE VLC_SSE_is_not_implemented_on_this_compiler
71 # define vlc_CPU_SSE2() (1)
73 # define vlc_CPU_SSE2() ((vlc_CPU() & VLC_CPU_SSE2) != 0)
77 # define vlc_CPU_SSE3() (1)
79 # define vlc_CPU_SSE3() ((vlc_CPU() & VLC_CPU_SSE3) != 0)
83 # define vlc_CPU_SSSE3() (1)
85 # define vlc_CPU_SSSE3() ((vlc_CPU() & VLC_CPU_SSSE3) != 0)
88 # elif defined (__ppc__) || defined (__ppc64__) || defined (__powerpc__)
90 # define VLC_CPU_ALTIVEC 2
93 # define vlc_CPU_ALTIVEC() (1)
95 # define vlc_CPU_ALTIVEC() ((vlc_CPU() & VLC_CPU_ALTIVEC) != 0)
98 # elif defined (__arm__)
99 # if defined (__VFP_FP__) && !defined (__SOFTFP__)
104 # define VLC_CPU_ARM_NEON 2
107 # define vlc_CPU_ARM_NEON() (1)
109 # define vlc_CPU_ARM_NEON() ((vlc_CPU() & VLC_CPU_ARM_NEON) != 0)
112 # elif defined (__sparc__)
117 * Are single precision floating point operations "fast"?
118 * If this preprocessor constant is zero, floating point should be avoided
119 * (especially relevant for audio codecs).
125 #endif /* !VLC_CPU_H */