1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2004-2010 x264 project
6 * Authors: Loren Merritt <lorenm@u.washington.edu>
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
22 * This program is also available under a commercial proprietary license.
23 * For more information, contact us at licensing@x264.com.
24 *****************************************************************************/
29 uint32_t x264_cpu_detect( void );
30 int x264_cpu_num_processors( void );
31 void x264_cpu_emms( void );
32 void x264_cpu_sfence( void );
34 #define x264_emms() x264_cpu_emms()
38 #define x264_sfence x264_cpu_sfence
39 void x264_cpu_mask_misalign_sse( void );
42 * gcc can't give variables any greater alignment than the stack frame has.
43 * We need 16 byte alignment for SSE2, so here we make sure that the stack is
44 * aligned to 16 bytes.
45 * gcc 4.2 introduced __attribute__((force_align_arg_pointer)) to fix this
46 * problem, but I don't want to require such a new version.
47 * This applies only to x86_32, since other architectures that need alignment
48 * either have ABIs that ensure aligned stack, or don't support it at all. */
49 #if ARCH_X86 && HAVE_MMX
50 int x264_stack_align( void (*func)(), ... );
51 #define x264_stack_align(func,...) x264_stack_align((void (*)())func, __VA_ARGS__)
53 #define x264_stack_align(func,...) func(__VA_ARGS__)
60 extern const x264_cpu_name_t x264_cpu_names[];