1 /*****************************************************************************
2 * cpu.c: h264 encoder library
3 *****************************************************************************
4 * Copyright (C) 2003 Laurent Aimar
5 * $Id: cpu.c,v 1.1 2004/06/03 19:27:06 fenrir Exp $
7 * Authors: Laurent Aimar <fenrir@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 #if defined(HAVE_PTHREAD) && defined(SYS_LINUX)
29 #include <kernel/OS.h>
37 #if defined(ARCH_X86) || defined(ARCH_X86_64)
38 extern int x264_cpu_cpuid_test( void );
39 extern uint32_t x264_cpu_cpuid( uint32_t op, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx );
40 extern void x264_emms( void );
42 uint32_t x264_cpu_detect( void )
46 uint32_t eax, ebx, ecx, edx;
50 if( !x264_cpu_cpuid_test() )
56 x264_cpu_cpuid( 0, &eax, &ebx, &ecx, &edx);
61 b_amd = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
63 x264_cpu_cpuid( 1, &eax, &ebx, &ecx, &edx );
64 if( (edx&0x00800000) == 0 )
70 if( (edx&0x02000000) )
72 /* SSE - identical to AMD MMX extensions */
73 cpu |= X264_CPU_MMXEXT|X264_CPU_SSE;
75 if( (edx&0x04000000) )
81 x264_cpu_cpuid( 0x80000000, &eax, &ebx, &ecx, &edx );
82 if( eax < 0x80000001 )
84 /* no extended capabilities */
88 x264_cpu_cpuid( 0x80000001, &eax, &ebx, &ecx, &edx );
91 cpu |= X264_CPU_3DNOW;
93 if( b_amd && (edx&0x00400000) )
95 /* AMD MMX extensions */
96 cpu |= X264_CPU_MMXEXT;
102 void x264_cpu_restore( uint32_t cpu )
104 if( cpu&(X264_CPU_MMX|X264_CPU_MMXEXT|X264_CPU_3DNOW|X264_CPU_3DNOWEXT) )
110 #elif defined( ARCH_PPC )
113 #include <sys/sysctl.h>
114 uint32_t x264_cpu_detect( void )
118 int selectors[2] = { CTL_HW, HW_VECTORUNIT };
120 size_t length = sizeof( has_altivec );
121 int error = sysctl( selectors, 2, &has_altivec, &length, NULL, 0 );
123 if( error == 0 && has_altivec != 0 )
125 cpu |= X264_CPU_ALTIVEC;
131 #elif defined( SYS_LINUX )
132 uint32_t x264_cpu_detect( void )
134 /* FIXME (Linux PPC) */
135 return X264_CPU_ALTIVEC;
139 void x264_cpu_restore( uint32_t cpu )
145 uint32_t x264_cpu_detect( void )
150 void x264_cpu_restore( uint32_t cpu )
157 int x264_cpu_num_processors( void )
159 #if !defined(HAVE_PTHREAD)
162 #elif defined(SYS_LINUX) || defined(WIN32)
165 uint32_t p_aff, s_aff;
166 GetProcessAffinityMask( GetCurrentProcess(), &p_aff, &s_aff );
169 sched_getaffinity( 0, sizeof(p_aff), (cpu_set_t*)&p_aff );
171 for( np = 0; p_aff != 0; p_aff >>= 1 )
175 #elif defined(SYS_BEOS)
177 get_system_info( &info );
178 return info.cpu_count;
180 #elif defined(SYS_MACOSX)
184 if( ( pipe = popen( "/usr/sbin/sysctl hw.ncpu", "r" ) ) )
186 memset( buffer, 0, 16 );
187 if( fgets( buffer, 16, pipe ) )
189 if( sscanf( buffer, "hw.ncpu: %d", &num ) != 1 )