mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 04:26:37 +08:00
86c5a23ee5
We reset .Lpic_gp to zero at the start of each function, which means
that the logic within movrelx for clearing gp when necessary will
be missed.
This fixes using movrelx in different functions with a different
helper register.
This is cherry-picked from libav commit
824e8c2840.
Signed-off-by: Ronald S. Bultje <rsbultje@gmail.com>
335 lines
8.2 KiB
ArmAsm
335 lines
8.2 KiB
ArmAsm
/*
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* Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "config.h"
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#ifdef __ELF__
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# define ELF
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#else
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# define ELF @
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#endif
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#if CONFIG_THUMB
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# define A @
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# define T
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#else
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# define A
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# define T @
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#endif
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#if HAVE_AS_FUNC
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# define FUNC
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#else
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# define FUNC @
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#endif
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#if HAVE_NEON
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.arch armv7-a
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#elif HAVE_ARMV6T2
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.arch armv6t2
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#elif HAVE_ARMV6
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.arch armv6
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#elif HAVE_ARMV5TE
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.arch armv5te
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#endif
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#if HAVE_AS_OBJECT_ARCH
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ELF .object_arch armv4
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#endif
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#if HAVE_NEON
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.fpu neon
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ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch
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ELF .eabi_attribute 12, 0 @ suppress Tag_Advanced_SIMD_arch
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#elif HAVE_VFP
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.fpu vfp
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ELF .eabi_attribute 10, 0 @ suppress Tag_FP_arch
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#endif
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.syntax unified
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T .thumb
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ELF .eabi_attribute 25, 1 @ Tag_ABI_align_preserved
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ELF .section .note.GNU-stack,"",%progbits @ Mark stack as non-executable
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.macro function name, export=0, align=2
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.set .Lpic_idx, 0
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.set .Lpic_gp, 0
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.macro endfunc
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.if .Lpic_idx
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.align 2
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.altmacro
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put_pic %(.Lpic_idx - 1)
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.noaltmacro
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.endif
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.if .Lpic_gp
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.unreq gp
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.endif
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ELF .size \name, . - \name
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FUNC .endfunc
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.purgem endfunc
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.endm
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.text
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.align \align
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.if \export
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.global EXTERN_ASM\name
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ELF .type EXTERN_ASM\name, %function
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FUNC .func EXTERN_ASM\name
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EXTERN_ASM\name:
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.else
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ELF .type \name, %function
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FUNC .func \name
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\name:
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.endif
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.endm
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.macro const name, align=2, relocate=0
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.macro endconst
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ELF .size \name, . - \name
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.purgem endconst
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.endm
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.if HAVE_SECTION_DATA_REL_RO && \relocate
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.section .data.rel.ro
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.else
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.section .rodata
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.endif
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.align \align
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\name:
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.endm
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#if !HAVE_ARMV6T2_EXTERNAL
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.macro movw rd, val
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mov \rd, \val & 255
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orr \rd, \val & ~255
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.endm
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#endif
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.macro mov32 rd, val
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#if HAVE_ARMV6T2_EXTERNAL
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movw \rd, #(\val) & 0xffff
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.if (\val) >> 16
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movt \rd, #(\val) >> 16
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.endif
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#else
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ldr \rd, =\val
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#endif
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.endm
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.macro put_pic num
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put_pic_\num
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.endm
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.macro do_def_pic num, val, label
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.macro put_pic_\num
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.if \num
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.altmacro
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put_pic %(\num - 1)
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.noaltmacro
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.endif
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\label: .word \val
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.purgem put_pic_\num
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.endm
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.endm
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.macro def_pic val, label
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.altmacro
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do_def_pic %.Lpic_idx, \val, \label
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.noaltmacro
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.set .Lpic_idx, .Lpic_idx + 1
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.endm
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.macro ldpic rd, val, indir=0
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ldr \rd, .Lpicoff\@
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.Lpic\@:
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.if \indir
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A ldr \rd, [pc, \rd]
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T add \rd, pc
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T ldr \rd, [\rd]
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.else
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add \rd, pc
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.endif
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def_pic \val - (.Lpic\@ + (8 >> CONFIG_THUMB)), .Lpicoff\@
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.endm
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.macro movrel rd, val
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#if CONFIG_PIC
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ldpic \rd, \val
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#elif HAVE_ARMV6T2_EXTERNAL && !defined(__APPLE__)
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movw \rd, #:lower16:\val
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movt \rd, #:upper16:\val
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#else
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ldr \rd, =\val
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#endif
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.endm
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.macro movrelx rd, val, gp
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#if CONFIG_PIC && defined(__ELF__)
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.ifnb \gp
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.if .Lpic_gp
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.unreq gp
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.endif
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gp .req \gp
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ldpic gp, _GLOBAL_OFFSET_TABLE_
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.elseif !.Lpic_gp
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gp .req r12
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ldpic gp, _GLOBAL_OFFSET_TABLE_
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.endif
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.set .Lpic_gp, 1
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ldr \rd, .Lpicoff\@
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ldr \rd, [gp, \rd]
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def_pic \val(GOT), .Lpicoff\@
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#elif CONFIG_PIC && defined(__APPLE__)
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ldpic \rd, .Lpic\@, indir=1
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.non_lazy_symbol_pointer
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.Lpic\@:
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.indirect_symbol \val
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.word 0
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.text
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#else
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movrel \rd, \val
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#endif
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.endm
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.macro add_sh rd, rn, rm, sh:vararg
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A add \rd, \rn, \rm, \sh
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T mov \rm, \rm, \sh
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T add \rd, \rn, \rm
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.endm
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.macro ldr_pre rt, rn, rm:vararg
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A ldr \rt, [\rn, \rm]!
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T add \rn, \rn, \rm
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T ldr \rt, [\rn]
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.endm
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.macro ldr_dpre rt, rn, rm:vararg
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A ldr \rt, [\rn, -\rm]!
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T sub \rn, \rn, \rm
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T ldr \rt, [\rn]
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.endm
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.macro ldr_nreg rt, rn, rm:vararg
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A ldr \rt, [\rn, -\rm]
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T sub \rt, \rn, \rm
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T ldr \rt, [\rt]
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.endm
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.macro ldr_post rt, rn, rm:vararg
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A ldr \rt, [\rn], \rm
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T ldr \rt, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro ldrc_pre cc, rt, rn, rm:vararg
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A ldr\cc \rt, [\rn, \rm]!
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T itt \cc
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T add\cc \rn, \rn, \rm
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T ldr\cc \rt, [\rn]
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.endm
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.macro ldrd_reg rt, rt2, rn, rm
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A ldrd \rt, \rt2, [\rn, \rm]
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T add \rt, \rn, \rm
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T ldrd \rt, \rt2, [\rt]
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.endm
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.macro ldrd_post rt, rt2, rn, rm
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A ldrd \rt, \rt2, [\rn], \rm
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T ldrd \rt, \rt2, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro ldrh_pre rt, rn, rm
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A ldrh \rt, [\rn, \rm]!
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T add \rn, \rn, \rm
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T ldrh \rt, [\rn]
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.endm
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.macro ldrh_dpre rt, rn, rm
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A ldrh \rt, [\rn, -\rm]!
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T sub \rn, \rn, \rm
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T ldrh \rt, [\rn]
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.endm
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.macro ldrh_post rt, rn, rm
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A ldrh \rt, [\rn], \rm
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T ldrh \rt, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro ldrb_post rt, rn, rm
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A ldrb \rt, [\rn], \rm
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T ldrb \rt, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro str_post rt, rn, rm:vararg
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A str \rt, [\rn], \rm
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T str \rt, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro strb_post rt, rn, rm:vararg
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A strb \rt, [\rn], \rm
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T strb \rt, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro strd_post rt, rt2, rn, rm
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A strd \rt, \rt2, [\rn], \rm
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T strd \rt, \rt2, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro strh_pre rt, rn, rm
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A strh \rt, [\rn, \rm]!
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T add \rn, \rn, \rm
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T strh \rt, [\rn]
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.endm
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.macro strh_dpre rt, rn, rm
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A strh \rt, [\rn, -\rm]!
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T sub \rn, \rn, \rm
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T strh \rt, [\rn]
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.endm
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.macro strh_post rt, rn, rm
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A strh \rt, [\rn], \rm
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T strh \rt, [\rn]
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T add \rn, \rn, \rm
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.endm
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.macro strh_dpost rt, rn, rm
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A strh \rt, [\rn], -\rm
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T strh \rt, [\rn]
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T sub \rn, \rn, \rm
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.endm
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#if HAVE_VFP_ARGS
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ELF .eabi_attribute 28, 1
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# define VFP
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# define NOVFP @
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#else
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# define VFP @
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# define NOVFP
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#endif
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#define GLUE(a, b) a ## b
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#define JOIN(a, b) GLUE(a, b)
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#define X(s) JOIN(EXTERN_ASM, s)
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