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325 lines
7.8 KiB
325 lines
7.8 KiB
/* |
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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 Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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_NEON |
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.fpu neon |
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#elif HAVE_VFP |
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.fpu vfp |
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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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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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