#------------------------------------------------------------------------------ | |
# | |
# Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> | |
# | |
# SPDX-License-Identifier: BSD-2-Clause-Patent | |
# | |
#------------------------------------------------------------------------------ | |
#include <AsmMacroIoLib.h> | |
.syntax unified | |
ASM_FUNC(__udivsi3) | |
cmp r1, #0 | |
cmpne r0, #0 | |
stmfd sp!, {r4, r5, r7, lr} | |
add r7, sp, #8 | |
beq L2 | |
clz r2, r1 | |
clz r3, r0 | |
rsb r3, r3, r2 | |
cmp r3, #31 | |
bhi L2 | |
ldmfdeq sp!, {r4, r5, r7, pc} | |
add r5, r3, #1 | |
rsb r3, r3, #31 | |
mov lr, #0 | |
mov r2, r0, asl r3 | |
mov ip, r0, lsr r5 | |
mov r4, lr | |
b L8 | |
L9: | |
mov r0, r2, lsr #31 | |
orr ip, r0, ip, asl #1 | |
orr r2, r3, lr | |
rsb r3, ip, r1 | |
sub r3, r3, #1 | |
and r0, r1, r3, asr #31 | |
mov lr, r3, lsr #31 | |
rsb ip, r0, ip | |
add r4, r4, #1 | |
L8: | |
cmp r4, r5 | |
mov r3, r2, asl #1 | |
bne L9 | |
orr r0, r3, lr | |
ldmfd sp!, {r4, r5, r7, pc} | |
L2: | |
mov r0, #0 | |
ldmfd sp!, {r4, r5, r7, pc} | |