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ffmpeg / libavcodec / arm / asm.S @ 2912e87a

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/*
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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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.macro  require8 val=1
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ELF     .eabi_attribute 24, \val
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.endm
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.macro  preserve8 val=1
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ELF     .eabi_attribute 25, \val
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.endm
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.macro  function name, export=0
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    .macro endfunc
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ELF     .size   \name, . - \name
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        .endfunc
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        .purgem endfunc
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    .endm
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        .text
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    .if \export
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        .global EXTERN_ASM\name
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EXTERN_ASM\name:
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    .endif
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ELF     .type   \name, %function
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        .func   \name
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\name:
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.endm
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.macro  const   name, align=2
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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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        .section        .rodata
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        .align          \align
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\name:
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.endm
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.macro  mov32   rd, val
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#if HAVE_ARMV6T2
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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  movrel rd, val
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#if HAVE_ARMV6T2 && !CONFIG_PIC && !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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#if HAVE_VFP_ARGS
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        .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)