9eea433acb05b1f110f9d8bb79efba9ea21e059d
[libav.git] / libavcodec / arm / asm.S
1 /*
2 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 #include "config.h"
22
23 #ifdef __ELF__
24 # define ELF
25 #else
26 # define ELF @
27 #endif
28
29 .macro require8 val=1
30 ELF .eabi_attribute 24, \val
31 .endm
32
33 .macro preserve8 val=1
34 ELF .eabi_attribute 25, \val
35 .endm
36
37 .macro function name, export=0
38 .macro endfunc
39 ELF .size \name, . - \name
40 .endfunc
41 .purgem endfunc
42 .endm
43 .if \export
44 .global EXTERN_ASM\name
45 EXTERN_ASM\name:
46 .endif
47 ELF .type \name, %function
48 .func \name
49 \name:
50 .endm
51
52 .macro movrel rd, val
53 #if HAVE_ARMV6T2 && !CONFIG_PIC
54 movw \rd, #:lower16:\val
55 movt \rd, #:upper16:\val
56 #else
57 ldr \rd, =\val
58 #endif
59 .endm
60
61 #if HAVE_VFP_ARGS
62 .eabi_attribute 28, 1
63 # define VFP
64 # define NOVFP @
65 #else
66 # define VFP @
67 # define NOVFP
68 #endif
69
70 #define GLUE(a, b) a ## b
71 #define JOIN(a, b) GLUE(a, b)
72 #define X(s) JOIN(EXTERN_ASM, s)