64 lines
2.0 KiB
ArmAsm
64 lines
2.0 KiB
ArmAsm
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/*
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* Copyright (c) 2015 ARM Ltd
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the company may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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.arm
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.syntax divided
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.global __aeabi_memmove
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.type __aeabi_memmove, %function
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ASM_ALIAS __aeabi_memmove4 __aeabi_memmove
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ASM_ALIAS __aeabi_memmove8 __aeabi_memmove
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__aeabi_memmove:
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.cfi_startproc
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cmp r0, r1
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add r3, r1, r2
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bhi .L2
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.L4:
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sub r2, r0, #1
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b .L3
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.L2:
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cmp r0, r3
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addcc r1, r0, r2
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rsbcc r2, r3, r2
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bcs .L4
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.L5:
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cmn r3, r2
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ldrneb ip, [r3, #-1]!
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strneb ip, [r1, #-1]!
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bne .L5
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.L11:
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bx lr
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.L3:
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cmp r1, r3
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ldrneb ip, [r1], #1
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strneb ip, [r2, #1]!
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bne .L3
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.L12:
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bx lr
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.cfi_endproc
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.size __aeabi_memmove, . - __aeabi_memmove
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