110 lines
2.6 KiB
ArmAsm
110 lines
2.6 KiB
ArmAsm
/*
|
|
* Copyright (c) 2015 ARM Ltd
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the company may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY ARM LTD ``AS IS'' AND ANY EXPRESS OR IMPLIED
|
|
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL ARM LTD BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
|
|
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
|
|
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
|
|
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
|
|
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
.thumb
|
|
.syntax unified
|
|
.global __aeabi_memset
|
|
.type __aeabi_memset, %function
|
|
ASM_ALIAS __aeabi_memset4 __aeabi_memset
|
|
ASM_ALIAS __aeabi_memset8 __aeabi_memset
|
|
__aeabi_memset:
|
|
.cfi_startproc
|
|
push {r4, r5, r6}
|
|
lsls r4, r0, #30
|
|
beq .L14
|
|
subs r4, r1, #1
|
|
cmp r1, #0
|
|
beq .L16
|
|
uxtb r5, r2
|
|
mov r3, r0
|
|
b .L4
|
|
.L6:
|
|
subs r1, r4, #1
|
|
cbz r4, .L16
|
|
mov r4, r1
|
|
.L4:
|
|
strb r5, [r3], #1
|
|
lsls r1, r3, #30
|
|
bne .L6
|
|
.L2:
|
|
cmp r4, #3
|
|
bls .L11
|
|
uxtb r5, r2
|
|
orr r5, r5, r5, lsl #8
|
|
cmp r4, #15
|
|
orr r5, r5, r5, lsl #16
|
|
bls .L9
|
|
add r1, r3, #16
|
|
mov r6, r4
|
|
.L10:
|
|
subs r6, r6, #16
|
|
cmp r6, #15
|
|
str r5, [r1, #-16]
|
|
str r5, [r1, #-12]
|
|
str r5, [r1, #-8]
|
|
str r5, [r1, #-4]
|
|
add r1, r1, #16
|
|
bhi .L10
|
|
sub r1, r4, #16
|
|
bic r1, r1, #15
|
|
and r4, r4, #15
|
|
adds r1, r1, #16
|
|
cmp r4, #3
|
|
add r3, r3, r1
|
|
bls .L11
|
|
.L9:
|
|
mov r6, r3
|
|
mov r1, r4
|
|
.L12:
|
|
subs r1, r1, #4
|
|
cmp r1, #3
|
|
str r5, [r6], #4
|
|
bhi .L12
|
|
subs r1, r4, #4
|
|
bic r1, r1, #3
|
|
adds r1, r1, #4
|
|
add r3, r3, r1
|
|
and r4, r4, #3
|
|
.L11:
|
|
cbz r4, .L16
|
|
uxtb r2, r2
|
|
add r4, r4, r3
|
|
.L13:
|
|
strb r2, [r3], #1
|
|
cmp r3, r4
|
|
bne .L13
|
|
.L16:
|
|
pop {r4, r5, r6}
|
|
bx lr
|
|
.L14:
|
|
mov r4, r1
|
|
mov r3, r0
|
|
b .L2
|
|
.cfi_endproc
|
|
.size __aeabi_memset, . - __aeabi_memset
|