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/*
* 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_AS_FPU_DIRECTIVE
# define FPU
#else
# define FPU @
#endif
#if HAVE_AS_ARCH_DIRECTIVE
#if HAVE_NEON
.arch armv7-a
#elif HAVE_ARMV6T2
.arch armv6t2
#elif HAVE_ARMV6
.arch armv6
#elif HAVE_ARMV5TE
.arch armv5te
#endif
#endif
#if HAVE_AS_OBJECT_ARCH
ELF .object_arch armv4
#endif
#if HAVE_NEON
FPU .fpu neon
ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch
ELF .eabi_attribute 12, 0 @ suppress Tag_Advanced_SIMD_arch
#elif HAVE_VFP
FPU .fpu vfp
ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch
#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
.if .Lpic_gp
.unreq gp
.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, relocate=0
.macro endconst
ELF .size \name, . - \name
.purgem endconst
.endm
#if HAVE_SECTION_DATA_REL_RO
.if \relocate
.section .data.rel.ro
.else
.section .rodata
.endif
#elif !defined(__MACH__)
.section .rodata
#else
.const_data
#endif
.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
.ifc \rd,\gp
.error "movrelx needs two distinct registers"
.endif
.ifc \rd\()_\gp,r12_
.warning "movrelx rd=\rd without explicit set gp"
.endif
.ifc \rd\()_\gp,ip_
.warning "movrelx rd=\rd without explicit set gp"
.endif
#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)
|
