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 #define LDR1W_SHIFT     0
  17 #define STR1W_SHIFT     0
  18
  19         .macro ldr1w ptr reg abort
  20         W(ldr) \reg, [\ptr], #4
  21         .endm
  22
  23         .macro ldr4w ptr reg1 reg2 reg3 reg4 abort
  24         ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
  25         .endm
  26
  27         .macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
  28         ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
  29         .endm
  30
  31         .macro ldr1b ptr reg cond=al abort
  32         ldr\cond\()b \reg, [\ptr], #1
  33         .endm
  34
  35         .macro str1w ptr reg abort
  36         W(str) \reg, [\ptr], #4
  37         .endm
  38
  39         .macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
  40         stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
  41         .endm
  42
  43         .macro str1b ptr reg cond=al abort
  44         str\cond\()b \reg, [\ptr], #1
  45         .endm
  46
  47         .macro enter reg1 reg2
  48         stmdb sp!, {r0, \reg1, \reg2}
  49         .endm
  50
  51         .macro exit reg1 reg2
  52         ldmfd sp!, {r0, \reg1, \reg2}
  53         .endm
  54
  55         .text
  56
  57 /* Prototype: void *memcpy(void *dest, const void *src, size_t n); */
  58
  59 ENTRY(memcpy)
  60
  61 #include "copy_template.S"
  62
  63 ENDPROC(memcpy)