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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#if HAVE_AS_FUNC
30#   define FUNC
31#else
32#   define FUNC #
33#endif
34
35#ifndef __has_feature
36#   define __has_feature(x) 0
37#endif
38
39.macro  function name, export=0, align=2
40    .macro endfunc
41ELF     .size   \name, . - \name
42FUNC    .endfunc
43        .purgem endfunc
44    .endm
45        .text
46        .align          \align
47    .if \export
48        .global EXTERN_ASM\name
49ELF     .type   EXTERN_ASM\name, %function
50FUNC    .func   EXTERN_ASM\name
51EXTERN_ASM\name:
52    .else
53ELF     .type   \name, %function
54FUNC    .func   \name
55\name:
56    .endif
57.endm
58
59.macro  const   name, align=2, relocate=0
60    .macro endconst
61ELF     .size   \name, . - \name
62        .purgem endconst
63    .endm
64#if HAVE_SECTION_DATA_REL_RO
65.if \relocate
66        .section        .data.rel.ro
67.else
68        .section        .rodata
69.endif
70#elif defined(_WIN32)
71        .section        .rdata
72#elif !defined(__MACH__)
73        .section        .rodata
74#else
75        .const_data
76#endif
77        .align          \align
78\name:
79.endm
80
81.macro  movrel rd, val, offset=0
82#if CONFIG_PIC && defined(__APPLE__)
83    .if \offset < 0
84        adrp            \rd, \val@PAGE
85        add             \rd, \rd, \val@PAGEOFF
86        sub             \rd, \rd, -(\offset)
87    .else
88        adrp            \rd, \val+(\offset)@PAGE
89        add             \rd, \rd, \val+(\offset)@PAGEOFF
90    .endif
91#elif CONFIG_PIC && defined(_WIN32)
92    .if \offset < 0
93        adrp            \rd, \val
94        add             \rd, \rd, :lo12:\val
95        sub             \rd, \rd, -(\offset)
96    .else
97        adrp            \rd, \val+(\offset)
98        add             \rd, \rd, :lo12:\val+(\offset)
99    .endif
100#elif CONFIG_PIC
101#   if __has_feature(hwaddress_sanitizer)
102        adrp            \rd, :pg_hi21_nc:\val+(\offset)
103#   else
104        adrp            \rd, \val+(\offset)
105#   endif
106        add             \rd, \rd, :lo12:\val+(\offset)
107#else
108        ldr             \rd, =\val+\offset
109#endif
110.endm
111
112#define GLUE(a, b) a ## b
113#define JOIN(a, b) GLUE(a, b)
114#define X(s) JOIN(EXTERN_ASM, s)
115
116#define x18 do_not_use_x18
117#define w18 do_not_use_w18
118