audk/ArmPkg/Library/CompilerIntrinsicsLib/Arm/memcpy.S

33 lines
971 B
ArmAsm

#------------------------------------------------------------------------------
#
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#------------------------------------------------------------------------------
.text
.align 2
GCC_ASM_EXPORT(__aeabi_memcpy)
GCC_ASM_EXPORT(memcpy)
ASM_PFX(__aeabi_memcpy):
ASM_PFX(memcpy):
cmp r2, #0
bxeq lr
push {lr}
mov lr, r0
L5:
ldrb r3, [r1], #1 @ zero_extendqisi2
strb r3, [lr], #1
subs r2, r2, #1
bne L5
pop {pc}