1 /*****************************************************************************
2 * cpu.h: h264 encoder library
3 *****************************************************************************
4 * Copyright (C) 2004-2008 Loren Merritt <lorenm@u.washington.edu>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 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 General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111, USA.
19 *****************************************************************************/
24 uint32_t x264_cpu_detect( void );
25 int x264_cpu_num_processors( void );
26 void x264_cpu_emms( void );
27 void x264_cpu_sfence( void );
29 #define x264_emms() x264_cpu_emms()
33 #define x264_sfence x264_cpu_sfence
34 void x264_cpu_mask_misalign_sse( void );
37 * gcc can't give variables any greater alignment than the stack frame has.
38 * We need 16 byte alignment for SSE2, so here we make sure that the stack is
39 * aligned to 16 bytes.
40 * gcc 4.2 introduced __attribute__((force_align_arg_pointer)) to fix this
41 * problem, but I don't want to require such a new version.
42 * This applies only to x86_32, since other architectures that need alignment
43 * either have ABIs that ensure aligned stack, or don't support it at all. */
44 #if defined(ARCH_X86) && defined(HAVE_MMX)
45 int x264_stack_align( void (*func)(), ... );
46 #define x264_stack_align(func,...) x264_stack_align((void (*)())func, __VA_ARGS__)
48 #define x264_stack_align(func,...) func(__VA_ARGS__)
55 extern const x264_cpu_name_t x264_cpu_names[];