ArmPkg/Library/CompilerIntrinsicsLib/Arm/memcpy.S

   1 #------------------------------------------------------------------------------
   2 #
   3 # Copyright (c) 2008-2009 Apple Inc. All rights reserved.
   4 #
   5 # All rights reserved. This program and the accompanying materials
   6 # are licensed and made available under the terms and conditions of the BSD License
   7 # which accompanies this distribution.  The full text of the license may be found at
   8 # http://opensource.org/licenses/bsd-license.php
   9 #
  10 # THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  11 # WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  12 #
  13 #------------------------------------------------------------------------------
  14
  15         .text
  16         .align 2
  17         .globl _memcpy
  18 _memcpy:
  19         @ args = 0, pretend = 0, frame = 0
  20         @ frame_needed = 1, uses_anonymous_args = 0
  21         stmfd   sp!, {r7, lr}
  22         mov     ip, #0
  23         add     r7, sp, #0
  24         mov     lr, r0
  25         b       L4
  26 L5:
  27         ldrb    r3, [r1], #1    @ zero_extendqisi2
  28         add     ip, ip, #1
  29         and     r3, r3, #255
  30         strb    r3, [lr], #1
  31 L4:
  32         cmp     ip, r2
  33         bne     L5
  34         ldmfd   sp!, {r7, pc}
  35