1 /*****************************************************************************
2 * cpu.h: h264 encoder library
3 *****************************************************************************
4 * Copyright (C) 2003 Laurent Aimar
5 * $Id: cpu.h,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 *****************************************************************************/
27 uint32_t x264_cpu_detect( void );
28 int x264_cpu_num_processors( void );
30 /* probably MMX(EXT) centric but .... */
31 void x264_cpu_restore( uint32_t cpu );
34 * gcc can't give variables any greater alignment than the stack frame has.
35 * We need 16 byte alignment for SSE2, so here we make sure that the stack is
36 * aligned to 16 bytes.
37 * gcc 4.2 introduced __attribute__((force_align_arg_pointer)) to fix this
38 * problem, but I don't want to require such a new version.
39 * This applies only to x86_32, since other architectures that need alignment
40 * also have ABIs that ensure aligned stack. */
41 #if defined(ARCH_X86) && defined(HAVE_MMX)
42 void x264_stack_align( void (*func)(x264_t*), x264_t *arg );
44 #define x264_stack_align(func,arg) func(arg)