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/*

 * Copyright (c) 2008 Mans Rullgard 

 *

 * 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_NEON

        .arch           armv7-a

#elif HAVE_ARMV6T2

        .arch           armv6t2

#elif HAVE_ARMV6

        .arch           armv6

#elif HAVE_ARMV5TE

        .arch           armv5te

#endif

#if   HAVE_NEON

        .fpu            neon

#elif HAVE_VFP

        .fpu            vfp

#endif

        .syntax unified

T       .thumb

ELF     .eabi_attribute 25, 1           @ Tag_ABI_align_preserved

.macro  function name, export=0

        .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

        .endfunc

        .purgem endfunc

    .endm

        .text

        .align          2

    .if \export

        .global EXTERN_ASM\name

EXTERN_ASM\name:

    .endif

ELF     .type   \name, %function

        .func   \name

\name:

.endm

.macro  const   name, align=2

    .macro endconst

ELF     .size   \name, . - \name

        .purgem endconst

    .endm

        .section        .rodata

        .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  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)