[deb_ffmpeg.git] / ffmpeg / libavutil / arm / asm.S

/*
 * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include "config.h"

#ifdef __ELF__
#   define ELF
#else
#   define ELF @
#endif

#if CONFIG_THUMB
#   define A @
#   define T
#else
#   define A
#   define T @
#endif

#if HAVE_AS_FUNC
#   define FUNC
#else
#   define FUNC @
#endif

#if   HAVE_NEON
        .arch           armv7-a
#elif HAVE_ARMV6T2
        .arch           armv6t2
#elif HAVE_ARMV6
        .arch           armv6
#elif HAVE_ARMV5TE
        .arch           armv5te
#endif

#if   HAVE_NEON
        .fpu            neon
#elif HAVE_VFP
        .fpu            vfp
#endif

        .syntax unified
T       .thumb
ELF     .eabi_attribute 25, 1           @ Tag_ABI_align_preserved
ELF     .section .note.GNU-stack,"",%progbits @ Mark stack as non-executable

.macro  function name, export=0, align=2
        .set            .Lpic_idx, 0
        .set            .Lpic_gp, 0
    .macro endfunc
      .if .Lpic_idx
        .align          2
        .altmacro
        put_pic         %(.Lpic_idx - 1)
        .noaltmacro
      .endif
ELF     .size   \name, . - \name
FUNC    .endfunc
        .purgem endfunc
    .endm
        .text
        .align          \align
    .if \export
        .global EXTERN_ASM\name
ELF     .type   EXTERN_ASM\name, %function
FUNC    .func   EXTERN_ASM\name
EXTERN_ASM\name:
    .else
ELF     .type   \name, %function
FUNC    .func   \name
\name:
    .endif
.endm

.macro  const   name, align=2
    .macro endconst
ELF     .size   \name, . - \name
        .purgem endconst
    .endm
        .section        .rodata
        .align          \align
\name:
.endm

#if !HAVE_ARMV6T2_EXTERNAL
.macro  movw    rd, val
        mov     \rd, \val &  255
        orr     \rd, \val & ~255
.endm
#endif

.macro  mov32   rd, val
#if HAVE_ARMV6T2_EXTERNAL
        movw            \rd, #(\val) & 0xffff
    .if (\val) >> 16
        movt            \rd, #(\val) >> 16
    .endif
#else
        ldr             \rd, =\val
#endif
.endm

.macro  put_pic         num
        put_pic_\num
.endm

.macro  do_def_pic      num, val, label
    .macro put_pic_\num
      .if \num
        .altmacro
        put_pic         %(\num - 1)
        .noaltmacro
      .endif
\label: .word           \val
        .purgem         put_pic_\num
    .endm
.endm

.macro  def_pic         val, label
        .altmacro
        do_def_pic      %.Lpic_idx, \val, \label
        .noaltmacro
        .set            .Lpic_idx, .Lpic_idx + 1
.endm

.macro  ldpic           rd,  val, indir=0
        ldr             \rd, .Lpicoff\@
.Lpic\@:
    .if \indir
A       ldr             \rd, [pc, \rd]
T       add             \rd, pc
T       ldr             \rd, [\rd]
    .else
        add             \rd, pc
    .endif
        def_pic         \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@
.endm

.macro  movrel rd, val
#if CONFIG_PIC
        ldpic           \rd, \val
#elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__)
        movw            \rd, #:lower16:\val
        movt            \rd, #:upper16:\val
#else
        ldr             \rd, =\val
#endif
.endm

.macro  movrelx         rd,  val, gp
#if CONFIG_PIC && defined(__ELF__)
    .ifnb \gp
      .if .Lpic_gp
        .unreq          gp
      .endif
        gp      .req    \gp
        ldpic           gp,  _GLOBAL_OFFSET_TABLE_
    .elseif !.Lpic_gp
        gp      .req    r12
        ldpic           gp,  _GLOBAL_OFFSET_TABLE_
    .endif
        .set            .Lpic_gp, 1
        ldr             \rd, .Lpicoff\@
        ldr             \rd, [gp, \rd]
        def_pic         \val(GOT), .Lpicoff\@
#elif CONFIG_PIC && defined(__APPLE__)
        ldpic           \rd, .Lpic\@, indir=1
        .non_lazy_symbol_pointer
.Lpic\@:
        .indirect_symbol \val
        .word           0
        .text
#else
        movrel          \rd, \val
#endif
.endm

.macro  add_sh          rd,  rn,  rm,  sh:vararg
A       add             \rd, \rn, \rm, \sh
T       mov             \rm, \rm, \sh
T       add             \rd, \rn, \rm
.endm

.macro  ldr_pre         rt,  rn,  rm:vararg
A       ldr             \rt, [\rn, \rm]!
T       add             \rn, \rn, \rm
T       ldr             \rt, [\rn]
.endm

.macro  ldr_dpre        rt,  rn,  rm:vararg
A       ldr             \rt, [\rn, -\rm]!
T       sub             \rn, \rn, \rm
T       ldr             \rt, [\rn]
.endm

.macro  ldr_nreg        rt,  rn,  rm:vararg
A       ldr             \rt, [\rn, -\rm]
T       sub             \rt, \rn, \rm
T       ldr             \rt, [\rt]
.endm

.macro  ldr_post        rt,  rn,  rm:vararg
A       ldr             \rt, [\rn], \rm
T       ldr             \rt, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  ldrc_pre        cc,  rt,  rn,  rm:vararg
A       ldr\cc          \rt, [\rn, \rm]!
T       itt             \cc
T       add\cc          \rn, \rn, \rm
T       ldr\cc          \rt, [\rn]
.endm

.macro  ldrd_reg        rt,  rt2, rn,  rm
A       ldrd            \rt, \rt2, [\rn, \rm]
T       add             \rt, \rn, \rm
T       ldrd            \rt, \rt2, [\rt]
.endm

.macro  ldrd_post       rt,  rt2, rn,  rm
A       ldrd            \rt, \rt2, [\rn], \rm
T       ldrd            \rt, \rt2, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  ldrh_pre        rt,  rn,  rm
A       ldrh            \rt, [\rn, \rm]!
T       add             \rn, \rn, \rm
T       ldrh            \rt, [\rn]
.endm

.macro  ldrh_dpre       rt,  rn,  rm
A       ldrh            \rt, [\rn, -\rm]!
T       sub             \rn, \rn, \rm
T       ldrh            \rt, [\rn]
.endm

.macro  ldrh_post       rt,  rn,  rm
A       ldrh            \rt, [\rn], \rm
T       ldrh            \rt, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  ldrb_post       rt,  rn,  rm
A       ldrb            \rt, [\rn], \rm
T       ldrb            \rt, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  str_post       rt,  rn,  rm:vararg
A       str             \rt, [\rn], \rm
T       str             \rt, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  strb_post       rt,  rn,  rm:vararg
A       strb            \rt, [\rn], \rm
T       strb            \rt, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  strd_post       rt,  rt2, rn,  rm
A       strd            \rt, \rt2, [\rn], \rm
T       strd            \rt, \rt2, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  strh_pre        rt,  rn,  rm
A       strh            \rt, [\rn, \rm]!
T       add             \rn, \rn, \rm
T       strh            \rt, [\rn]
.endm

.macro  strh_dpre       rt,  rn,  rm
A       strh            \rt, [\rn, -\rm]!
T       sub             \rn, \rn, \rm
T       strh            \rt, [\rn]
.endm

.macro  strh_post       rt,  rn,  rm
A       strh            \rt, [\rn], \rm
T       strh            \rt, [\rn]
T       add             \rn, \rn, \rm
.endm

.macro  strh_dpost       rt,  rn,  rm
A       strh            \rt, [\rn], -\rm
T       strh            \rt, [\rn]
T       sub             \rn, \rn, \rm
.endm

#if HAVE_VFP_ARGS
ELF     .eabi_attribute 28, 1
#   define VFP
#   define NOVFP @
#else
#   define VFP   @
#   define NOVFP
#endif

#define GLUE(a, b) a ## b
#define JOIN(a, b) GLUE(a, b)
#define X(s) JOIN(EXTERN_ASM, s)
Commit	Line	Data
2ba45a60 DM	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 CONFIG_THUMB
	30	# define A @
	31	# define T
	32	#else
	33	# define A
	34	# define T @
	35	#endif
	36
	37	#if HAVE_AS_FUNC
	38	# define FUNC
	39	#else
	40	# define FUNC @
	41	#endif
	42
	43	#if HAVE_NEON
	44	.arch armv7-a
	45	#elif HAVE_ARMV6T2
	46	.arch armv6t2
	47	#elif HAVE_ARMV6
	48	.arch armv6
	49	#elif HAVE_ARMV5TE
	50	.arch armv5te
	51	#endif
	52
	53	#if HAVE_NEON
	54	.fpu neon
	55	#elif HAVE_VFP
	56	.fpu vfp
	57	#endif
	58
	59	.syntax unified
	60	T .thumb
	61	ELF .eabi_attribute 25, 1 @ Tag_ABI_align_preserved
	62	ELF .section .note.GNU-stack,"",%progbits @ Mark stack as non-executable
	63
	64	.macro function name, export=0, align=2
65	.set .Lpic_idx, 0
66	.set .Lpic_gp, 0
67	.macro endfunc
68	.if .Lpic_idx
69	.align 2
70	.altmacro
71	put_pic %(.Lpic_idx - 1)
72	.noaltmacro
73	.endif
74	ELF .size \name, . - \name
75	FUNC .endfunc
76	.purgem endfunc
77	.endm
78	.text
79	.align \align
80	.if \export
81	.global EXTERN_ASM\name
82	ELF .type EXTERN_ASM\name, %function
83	FUNC .func EXTERN_ASM\name
84	EXTERN_ASM\name:
85	.else
86	ELF .type \name, %function
87	FUNC .func \name
88	\name:
89	.endif
90	.endm
91
92	.macro const name, align=2
93	.macro endconst
94	ELF .size \name, . - \name
95	.purgem endconst
96	.endm
97	.section .rodata
98	.align \align
99	\name:
100	.endm
101
102	#if !HAVE_ARMV6T2_EXTERNAL
103	.macro movw rd, val
104	mov \rd, \val & 255
105	orr \rd, \val & ~255
106	.endm
107	#endif
108
109	.macro mov32 rd, val
110	#if HAVE_ARMV6T2_EXTERNAL
111	movw \rd, #(\val) & 0xffff
112	.if (\val) >> 16
113	movt \rd, #(\val) >> 16
114	.endif
115	#else
116	ldr \rd, =\val
117	#endif
118	.endm
119
120	.macro put_pic num
121	put_pic_\num
122	.endm
123
124	.macro do_def_pic num, val, label
125	.macro put_pic_\num
126	.if \num
127	.altmacro
128	put_pic %(\num - 1)
129	.noaltmacro
130	.endif
131	\label: .word \val
132	.purgem put_pic_\num
133	.endm
134	.endm
135
136	.macro def_pic val, label
137	.altmacro
138	do_def_pic %.Lpic_idx, \val, \label
139	.noaltmacro
140	.set .Lpic_idx, .Lpic_idx + 1
141	.endm
142
143	.macro ldpic rd, val, indir=0
144	ldr \rd, .Lpicoff\@
145	.Lpic\@:
146	.if \indir
147	A ldr \rd, [pc, \rd]
148	T add \rd, pc
149	T ldr \rd, [\rd]
150	.else
151	add \rd, pc
152	.endif
153	def_pic \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@
154	.endm
155
156	.macro movrel rd, val
157	#if CONFIG_PIC
158	ldpic \rd, \val
159	#elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__)
160	movw \rd, #:lower16:\val
161	movt \rd, #:upper16:\val
162	#else
163	ldr \rd, =\val
164	#endif
165	.endm
166
167	.macro movrelx rd, val, gp
168	#if CONFIG_PIC && defined(__ELF__)
169	.ifnb \gp
170	.if .Lpic_gp
171	.unreq gp
172	.endif
173	gp .req \gp
174	ldpic gp, _GLOBAL_OFFSET_TABLE_
175	.elseif !.Lpic_gp
176	gp .req r12
177	ldpic gp, _GLOBAL_OFFSET_TABLE_
178	.endif
179	.set .Lpic_gp, 1
180	ldr \rd, .Lpicoff\@
181	ldr \rd, [gp, \rd]
182	def_pic \val(GOT), .Lpicoff\@
183	#elif CONFIG_PIC && defined(__APPLE__)
184	ldpic \rd, .Lpic\@, indir=1
185	.non_lazy_symbol_pointer
186	.Lpic\@:
187	.indirect_symbol \val
188	.word 0
189	.text
190	#else
191	movrel \rd, \val
192	#endif
193	.endm
194
195	.macro add_sh rd, rn, rm, sh:vararg
196	A add \rd, \rn, \rm, \sh
197	T mov \rm, \rm, \sh
198	T add \rd, \rn, \rm
199	.endm
200
201	.macro ldr_pre rt, rn, rm:vararg
202	A ldr \rt, [\rn, \rm]!
203	T add \rn, \rn, \rm
204	T ldr \rt, [\rn]
205	.endm
206
207	.macro ldr_dpre rt, rn, rm:vararg
208	A ldr \rt, [\rn, -\rm]!
209	T sub \rn, \rn, \rm
210	T ldr \rt, [\rn]
211	.endm
212
213	.macro ldr_nreg rt, rn, rm:vararg
214	A ldr \rt, [\rn, -\rm]
215	T sub \rt, \rn, \rm
216	T ldr \rt, [\rt]
217	.endm
218
219	.macro ldr_post rt, rn, rm:vararg
220	A ldr \rt, [\rn], \rm
221	T ldr \rt, [\rn]
222	T add \rn, \rn, \rm
223	.endm
224
225	.macro ldrc_pre cc, rt, rn, rm:vararg
226	A ldr\cc \rt, [\rn, \rm]!
227	T itt \cc
228	T add\cc \rn, \rn, \rm
229	T ldr\cc \rt, [\rn]
230	.endm
231
232	.macro ldrd_reg rt, rt2, rn, rm
233	A ldrd \rt, \rt2, [\rn, \rm]
234	T add \rt, \rn, \rm
235	T ldrd \rt, \rt2, [\rt]
236	.endm
237
238	.macro ldrd_post rt, rt2, rn, rm
239	A ldrd \rt, \rt2, [\rn], \rm
240	T ldrd \rt, \rt2, [\rn]
241	T add \rn, \rn, \rm
242	.endm
243
244	.macro ldrh_pre rt, rn, rm
245	A ldrh \rt, [\rn, \rm]!
246	T add \rn, \rn, \rm
247	T ldrh \rt, [\rn]
248	.endm
249
250	.macro ldrh_dpre rt, rn, rm
251	A ldrh \rt, [\rn, -\rm]!
252	T sub \rn, \rn, \rm
253	T ldrh \rt, [\rn]
254	.endm
255
256	.macro ldrh_post rt, rn, rm
257	A ldrh \rt, [\rn], \rm
258	T ldrh \rt, [\rn]
259	T add \rn, \rn, \rm
260	.endm
261
262	.macro ldrb_post rt, rn, rm
263	A ldrb \rt, [\rn], \rm
264	T ldrb \rt, [\rn]
265	T add \rn, \rn, \rm
266	.endm
267
268	.macro str_post rt, rn, rm:vararg
269	A str \rt, [\rn], \rm
270	T str \rt, [\rn]
271	T add \rn, \rn, \rm
272	.endm
273
274	.macro strb_post rt, rn, rm:vararg
275	A strb \rt, [\rn], \rm
276	T strb \rt, [\rn]
277	T add \rn, \rn, \rm
278	.endm
279
280	.macro strd_post rt, rt2, rn, rm
281	A strd \rt, \rt2, [\rn], \rm
282	T strd \rt, \rt2, [\rn]
283	T add \rn, \rn, \rm
284	.endm
285
286	.macro strh_pre rt, rn, rm
287	A strh \rt, [\rn, \rm]!
288	T add \rn, \rn, \rm
289	T strh \rt, [\rn]
290	.endm
291
292	.macro strh_dpre rt, rn, rm
293	A strh \rt, [\rn, -\rm]!
294	T sub \rn, \rn, \rm
295	T strh \rt, [\rn]
296	.endm
297
298	.macro strh_post rt, rn, rm
299	A strh \rt, [\rn], \rm
300	T strh \rt, [\rn]
301	T add \rn, \rn, \rm
302	.endm
303
304	.macro strh_dpost rt, rn, rm
305	A strh \rt, [\rn], -\rm
306	T strh \rt, [\rn]
307	T sub \rn, \rn, \rm
308	.endm
309
310	#if HAVE_VFP_ARGS
311	ELF .eabi_attribute 28, 1
312	# define VFP
313	# define NOVFP @
314	#else
315	# define VFP @
316	# define NOVFP
317	#endif
318
319	#define GLUE(a, b) a ## b
320	#define JOIN(a, b) GLUE(a, b)
321	#define X(s) JOIN(EXTERN_ASM, s)