ArmPkg/Library/CompilerIntrinsicsLib/Arm/memset.asm

   1 //------------------------------------------------------------------------------
   2 //
   3 // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   4 // Copyright (c) 2014, ARM Ltd. All rights reserved.<BR>
   5 //
   6 // This program and the accompanying materials
   7 // are licensed and made available under the terms and conditions of the BSD License
   8 // which accompanies this distribution.  The full text of the license may be found at
   9 // http://opensource.org/licenses/bsd-license.php
  10 //
  11 // THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  12 // WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  13 //
  14 //------------------------------------------------------------------------------
  15
  16
  17     EXPORT  __aeabi_memset
  18     EXPORT  __aeabi_memclr
  19     EXPORT  __aeabi_memclr4
  20
  21     AREA    Memset, CODE, READONLY
  22
  23 ; void __aeabi_memclr4(void *dest, size_t n);
  24 ; void __aeabi_memclr(void *dest, size_t n);
  25 __aeabi_memclr
  26 __aeabi_memclr4
  27   mov   r2, #0
  28
  29 ;
  30 ;VOID
  31 ;EFIAPI
  32 ;__aeabi_memset (
  33 ; IN  VOID    *Destination,
  34 ; IN  UINT32  Size,
  35 ; IN  UINT32  Character
  36 ; );
  37 ;
  38 __aeabi_memset
  39   cmp  r1, #0
  40   bxeq lr
  41   ; args = 0, pretend = 0, frame = 0
  42   ; frame_needed = 1, uses_anonymous_args = 0
  43 L10
  44   strb  r2, [r0], #1
  45   subs  r1, r1, #1
  46   ; While size is not 0
  47   bne  L10
  48   bx   lr
  49
  50   END