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/*****************************************************************************
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* cpu.c: h264 encoder library
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*****************************************************************************
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* Copyright (C) 2003 Laurent Aimar
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* $Id: cpu.c,v 1.1 2004/06/03 19:27:06 fenrir Exp $
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* Authors: Laurent Aimar <fenrir@via.ecp.fr>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
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*****************************************************************************/
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#if defined(ARCH_X86) || defined(ARCH_X86_64)
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extern int x264_cpu_cpuid_test( void );
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extern uint32_t x264_cpu_cpuid( uint32_t op, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx );
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extern void x264_emms( void );
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uint32_t x264_cpu_detect( void )
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uint32_t eax, ebx, ecx, edx;
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if( !x264_cpu_cpuid_test() )
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x264_cpu_cpuid( 0, &eax, &ebx, &ecx, &edx);
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b_amd = (ebx == 0x68747541) && (ecx == 0x444d4163) && (edx == 0x69746e65);
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x264_cpu_cpuid( 1, &eax, &ebx, &ecx, &edx );
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if( (edx&0x00800000) == 0 )
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if( (edx&0x02000000) )
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/* SSE - identical to AMD MMX extensions */
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cpu |= X264_CPU_MMXEXT|X264_CPU_SSE;
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if( (edx&0x04000000) )
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x264_cpu_cpuid( 0x80000000, &eax, &ebx, &ecx, &edx );
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if( eax < 0x80000001 )
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/* no extended capabilities */
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x264_cpu_cpuid( 0x80000001, &eax, &ebx, &ecx, &edx );
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cpu |= X264_CPU_3DNOW;
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if( b_amd && (edx&0x00400000) )
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/* AMD MMX extensions */
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cpu |= X264_CPU_MMXEXT;
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void x264_cpu_restore( uint32_t cpu )
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if( cpu&(X264_CPU_MMX|X264_CPU_MMXEXT|X264_CPU_3DNOW|X264_CPU_3DNOWEXT) )
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#elif defined( ARCH_PPC )
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#include <sys/sysctl.h>
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uint32_t x264_cpu_detect( void )
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int selectors[2] = { CTL_HW, HW_VECTORUNIT };
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size_t length = sizeof( has_altivec );
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int error = sysctl( selectors, 2, &has_altivec, &length, NULL, 0 );
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if( error == 0 && has_altivec != 0 )
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cpu |= X264_CPU_ALTIVEC;
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#elif defined( SYS_LINUX )
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uint32_t x264_cpu_detect( void )
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/* FIXME (Linux PPC) */
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return X264_CPU_ALTIVEC;
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void x264_cpu_restore( uint32_t cpu )
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uint32_t x264_cpu_detect( void )
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void x264_cpu_restore( uint32_t cpu )