BeagleBoardPkg: remove dependency on ArmPkg/BaseMemoryLibStm

[mirror_edk2.git] / ArmPkg / Library / BaseMemoryLibStm / Arm / SetMem.S

#------------------------------------------------------------------------------\r
#\r
# SemMem() worker for ARM\r
#\r
# This file started out as C code that did 64 bit moves if the buffer was\r
# 32-bit aligned, else it does a byte copy. It also does a byte copy for\r
# any trailing bytes. It was updated to do 32-byte at a time.\r
#\r
# Copyright (c) 2008 - 2010, Apple Inc. All rights reserved.<BR>\r
# This program and the accompanying materials\r
# are licensed and made available under the terms and conditions of the BSD License\r
# which accompanies this distribution.  The full text of the license may be found at\r
# http://opensource.org/licenses/bsd-license.php\r
#\r
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
#\r
#------------------------------------------------------------------------------\r
\r
#include <AsmMacroIoLib.h>\r
\r
/**\r
  Set Buffer to Value for Size bytes.\r
\r
  @param  Buffer   Memory to set.\r
  @param  Length   Number of bytes to set\r
  @param  Value    Value of the set operation.\r
\r
  @return Buffer\r
\r
VOID *\r
EFIAPI\r
InternalMemSetMem (\r
  OUT     VOID                      *Buffer,\r
  IN      UINTN                     Length,\r
  IN      UINT8                     Value\r
  )\r
**/\r
\r
.syntax unified\r
\r
ASM_FUNC(InternalMemSetMem)\r
  stmfd  sp!, {r4-r11, lr}\r
  tst    r0, #3\r
  movne  r3, #0\r
  moveq  r3, #1\r
  cmp    r1, #31\r
  movls lr, #0\r
  andhi  lr, r3, #1\r
  cmp    lr, #0\r
  mov    r12, r0\r
  bne    L31\r
L32:\r
  mov    r3, #0\r
  b      L43\r
L31:\r
  and   r4, r2, #0xff\r
  orr   r4, r4, r4, LSL #8\r
  orr   r4, r4, r4, LSL #16\r
  mov   r5, r4\r
  mov   r6, r4\r
  mov   r7, r4\r
  mov   r8, r4\r
  mov   r9, r4\r
  mov   r10, r4\r
  mov   r11, r4\r
  b      L32\r
L34:\r
  cmp      lr, #0\r
  strbeq  r2, [r12], #1\r
  subeq    r1, r1, #1\r
  beq      L43\r
  sub      r1, r1, #32\r
  cmp      r1, #31\r
  movls    lr, r3\r
  stmia    r12!, {r4-r11}\r
L43:\r
  cmp      r1, #0\r
  bne      L34\r
  ldmfd    sp!, {r4-r11, pc}\r
\r