ArmPkg/Library/CompilerIntrinsicsLib/Arm/memset.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 //
   5 // 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
  16     EXPORT  __aeabi_memset
  17     EXPORT  __aeabi_memclr
  18     EXPORT  __aeabi_memclr4
  19
  20     AREA    Memset, CODE, READONLY
  21
  22 ;
  23 ;VOID
  24 ;EFIAPI
  25 ;__aeabi_memset (
  26 ; IN  VOID    *Destination,
  27 ; IN  UINT32  Character,
  28 ; IN  UINT32  Size
  29 ; );
  30 ;
  31 __aeabi_memset
  32
  33   ; args = 0, pretend = 0, frame = 0
  34   ; frame_needed = 1, uses_anonymous_args = 0
  35   stmfd  sp!, {r7, lr}
  36   mov  ip, #0
  37   add  r7, sp, #0
  38   mov  lr, r0
  39   b  L9
  40 L10
  41   and  r3, r1, #255
  42   add  ip, ip, #1
  43   strb  r3, [lr], #1
  44 L9
  45   cmp  ip, r2
  46   bne  L10
  47   ldmfd  sp!, {r7, pc}
  48
  49 __aeabi_memclr
  50   mov   r2, r1
  51   mov   r1, #0
  52   b     __aeabi_memset
  53
  54 __aeabi_memclr4
  55   mov   r2, r1
  56   mov   r1, #0
  57   b     __aeabi_memset
  58
  59   END