cf9530e686
This code also removed some redundant instructions. __aeabi_memcpy doesn't require preservation of r0 (as memcpy does), which could save a push, but the code has been left to keep things consistent. The reason __aeabi_memcpy has been added to the .S file is so it will be available to toolchains that use the GCC assembler but the full ARM EABI (i.e. current LLVM) Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Olivier Martin <olivier.martin@arm.com> git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15124 6f19259b-4bc3-4df7-8a09-765794883524
33 lines
971 B
ArmAsm
33 lines
971 B
ArmAsm
#------------------------------------------------------------------------------
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#
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# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
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#
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# This program and the accompanying materials
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# are licensed and made available under the terms and conditions of the BSD License
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# which accompanies this distribution. The full text of the license may be found at
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# http://opensource.org/licenses/bsd-license.php
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#
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# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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#
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#------------------------------------------------------------------------------
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.text
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.align 2
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GCC_ASM_EXPORT(__aeabi_memcpy)
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GCC_ASM_EXPORT(memcpy)
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ASM_PFX(__aeabi_memcpy):
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ASM_PFX(memcpy):
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cmp r2, #0
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bxeq lr
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push {lr}
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mov lr, r0
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L5:
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ldrb r3, [r1], #1 @ zero_extendqisi2
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strb r3, [lr], #1
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subs r2, r2, #1
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bne L5
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pop {pc}
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