| /* |
| * 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_AS_OBJECT_ARCH |
| ELF .object_arch armv4 |
| #endif |
| |
| #if HAVE_NEON |
| .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 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 |
| 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 && \relocate |
| .section .data.rel.ro |
| .else |
| .section .rodata |
| .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 |
| #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) |
