1/*
2 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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 CONFIG_THUMB
30#   define A @
31#   define T
32#else
33#   define A
34#   define T @
35#endif
36
37#if   HAVE_NEON
38        .arch           armv7-a
39#elif HAVE_ARMV6T2
40        .arch           armv6t2
41#elif HAVE_ARMV6
42        .arch           armv6
43#elif HAVE_ARMV5TE
44        .arch           armv5te
45#endif
46
47#if   HAVE_NEON
48        .fpu            neon
49#elif HAVE_ARMVFP
50        .fpu            vfp
51#endif
52
53        .syntax unified
54T       .thumb
55
56.macro  require8 val=1
57ELF     .eabi_attribute 24, \val
58.endm
59
60.macro  preserve8 val=1
61ELF     .eabi_attribute 25, \val
62.endm
63
64.macro  function name, export=0
65    .macro endfunc
66ELF     .size   \name, . - \name
67        .endfunc
68        .purgem endfunc
69    .endm
70        .text
71        .align          2
72    .if \export
73        .global EXTERN_ASM\name
74EXTERN_ASM\name:
75    .endif
76ELF     .type   \name, %function
77        .func   \name
78\name:
79.endm
80
81.macro  const   name, align=2
82    .macro endconst
83ELF     .size   \name, . - \name
84        .purgem endconst
85    .endm
86        .section        .rodata
87        .align          \align
88\name:
89.endm
90
91.macro  mov32   rd, val
92#if HAVE_ARMV6T2
93        movw            \rd, #(\val) & 0xffff
94    .if (\val) >> 16
95        movt            \rd, #(\val) >> 16
96    .endif
97#else
98        ldr             \rd, =\val
99#endif
100.endm
101
102.macro  movrel rd, val
103#if HAVE_ARMV6T2 && !CONFIG_PIC && !defined(__APPLE__)
104        movw            \rd, #:lower16:\val
105        movt            \rd, #:upper16:\val
106#else
107        ldr             \rd, =\val
108#endif
109.endm
110
111.macro  ldr_pre         rt,  rn,  rm:vararg
112A       ldr             \rt, [\rn, \rm]!
113T       add             \rn, \rn, \rm
114T       ldr             \rt, [\rn]
115.endm
116
117.macro  ldr_dpre        rt,  rn,  rm:vararg
118A       ldr             \rt, [\rn, -\rm]!
119T       sub             \rn, \rn, \rm
120T       ldr             \rt, [\rn]
121.endm
122
123.macro  ldr_post        rt,  rn,  rm:vararg
124A       ldr             \rt, [\rn], \rm
125T       ldr             \rt, [\rn]
126T       add             \rn, \rn, \rm
127.endm
128
129.macro  ldrd_reg        rt,  rt2, rn,  rm
130A       ldrd            \rt, \rt2, [\rn, \rm]
131T       add             \rt, \rn, \rm
132T       ldrd            \rt, \rt2, [\rt]
133.endm
134
135.macro  ldrd_post       rt,  rt2, rn,  rm
136A       ldrd            \rt, \rt2, [\rn], \rm
137T       ldrd            \rt, \rt2, [\rn]
138T       add             \rn, \rn, \rm
139.endm
140
141.macro  ldrh_pre        rt,  rn,  rm
142A       ldrh            \rt, [\rn, \rm]!
143T       add             \rn, \rn, \rm
144T       ldrh            \rt, [\rn]
145.endm
146
147.macro  ldrh_dpre       rt,  rn,  rm
148A       ldrh            \rt, [\rn, -\rm]!
149T       sub             \rn, \rn, \rm
150T       ldrh            \rt, [\rn]
151.endm
152
153.macro  ldrh_post       rt,  rn,  rm
154A       ldrh            \rt, [\rn], \rm
155T       ldrh            \rt, [\rn]
156T       add             \rn, \rn, \rm
157.endm
158
159.macro  str_post       rt,  rn,  rm:vararg
160A       str             \rt, [\rn], \rm
161T       str             \rt, [\rn]
162T       add             \rn, \rn, \rm
163.endm
164
165.macro  strb_post       rt,  rn,  rm:vararg
166A       strb            \rt, [\rn], \rm
167T       strb            \rt, [\rn]
168T       add             \rn, \rn, \rm
169.endm
170
171.macro  strd_post       rt,  rt2, rn,  rm
172A       strd            \rt, \rt2, [\rn], \rm
173T       strd            \rt, \rt2, [\rn]
174T       add             \rn, \rn, \rm
175.endm
176
177.macro  strh_pre        rt,  rn,  rm
178A       strh            \rt, [\rn, \rm]!
179T       add             \rn, \rn, \rm
180T       strh            \rt, [\rn]
181.endm
182
183.macro  strh_dpre       rt,  rn,  rm
184A       strh            \rt, [\rn, -\rm]!
185T       sub             \rn, \rn, \rm
186T       strh            \rt, [\rn]
187.endm
188
189.macro  strh_post       rt,  rn,  rm
190A       strh            \rt, [\rn], \rm
191T       strh            \rt, [\rn]
192T       add             \rn, \rn, \rm
193.endm
194
195.macro  strh_dpost       rt,  rn,  rm
196A       strh            \rt, [\rn], -\rm
197T       strh            \rt, [\rn]
198T       sub             \rn, \rn, \rm
199.endm
200
201#if HAVE_VFP_ARGS
202        .eabi_attribute 28, 1
203#   define VFP
204#   define NOVFP @
205#else
206#   define VFP   @
207#   define NOVFP
208#endif
209
210#define GLUE(a, b) a ## b
211#define JOIN(a, b) GLUE(a, b)
212#define X(s) JOIN(EXTERN_ASM, s)
213