ffmpeg/libavutil/aarch64/asm.S

   1 /*
   2  * Copyright (c) 2008 Mans Rullgard <mans@mansr.com>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include "config.h"
  22
  23 #ifdef __ELF__
  24 #   define ELF
  25 #else
  26 #   define ELF  #
  27 #endif
  28
  29 #if HAVE_AS_FUNC
  30 #   define FUNC
  31 #else
  32 #   define FUNC #
  33 #endif
  34
  35 .macro  function name, export=0, align=2
  36     .macro endfunc
  37 ELF     .size   \name, . - \name
  38 FUNC    .endfunc
  39         .purgem endfunc
  40     .endm
  41         .text
  42         .align          \align
  43     .if \export
  44         .global EXTERN_ASM\name
  45 ELF     .type   EXTERN_ASM\name, %function
  46 FUNC    .func   EXTERN_ASM\name
  47 EXTERN_ASM\name:
  48     .else
  49 ELF     .type   \name, %function
  50 FUNC    .func   \name
  51 \name:
  52     .endif
  53 .endm
  54
  55 .macro  const   name, align=2
  56     .macro endconst
  57 ELF     .size   \name, . - \name
  58         .purgem endconst
  59     .endm
  60 #ifndef __MACH__
  61         .section        .rodata
  62 #else
  63         .const_data
  64 #endif
  65         .align          \align
  66 \name:
  67 .endm
  68
  69 .macro  movrel rd, val
  70 #if CONFIG_PIC && defined(__APPLE__)
  71         adrp            \rd, \val@PAGE
  72         add             \rd, \rd, \val@PAGEOFF
  73 #elif CONFIG_PIC
  74         adrp            \rd, \val
  75         add             \rd, \rd, :lo12:\val
  76 #else
  77         ldr             \rd, =\val
  78 #endif
  79 .endm
  80
  81 #define GLUE(a, b) a ## b
  82 #define JOIN(a, b) GLUE(a, b)
  83 #define X(s) JOIN(EXTERN_ASM, s)