| /* | |
| * 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 CONFIG_THUMB && defined(__APPLE__) | |
| # define TFUNC | |
| #else | |
| # define TFUNC @ | |
| #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 | |
| TFUNC .thumb_func EXTERN_ASM\name | |
| EXTERN_ASM\name: | |
| .else | |
| ELF .type \name, %function | |
| FUNC .func \name | |
| TFUNC .thumb_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(_WIN32) | |
| .section .rdata | |
| #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) |