arch/arm/lib/memcpy.S

   1 /*
   2  *  linux/arch/arm/lib/memcpy.S
   3  *
   4  *  Author:     Nicolas Pitre
   5  *  Created:    Sep 28, 2005
   6  *  Copyright:  MontaVista Software, Inc.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/linkage.h>
  14 #include <asm/assembler.h>
  15
  16         .macro ldr1w ptr reg abort
  17         ldr \reg, [\ptr], #4
  18         .endm
  19
  20         .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
  21         ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
  22         .endm
  23
  24         .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
  25         ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
  26         .endm
  27
  28         .macro ldr1b ptr reg cond=al abort
  29         ldr\cond\()b \reg, [\ptr], #1
  30         .endm
  31
  32         .macro str1w ptr reg abort
  33         str \reg, [\ptr], #4
  34         .endm
  35
  36         .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
  37         stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
  38         .endm
  39
  40         .macro str1b ptr reg cond=al abort
  41         str\cond\()b \reg, [\ptr], #1
  42         .endm
  43
  44         .macro enter reg1 reg2
  45         stmdb sp!, {r0, \reg1, \reg2}
  46         .endm
  47
  48         .macro exit reg1 reg2
  49         ldmfd sp!, {r0, \reg1, \reg2}
  50         .endm
  51
  52         .text
  53
  54 /* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
  55
  56 ENTRY(memcpy)
  57
  58 #include "copy_template.S"
  59
  60 ENDPROC(memcpy)