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https://github.com/CloverHackyColor/CloverBootloader.git
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52 lines
1.0 KiB
ArmAsm
52 lines
1.0 KiB
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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# SPDX-License-Identifier: BSD-2-Clause-Patent
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#
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#------------------------------------------------------------------------------
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#include <AsmMacroIoLib.h>
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.syntax unified
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ASM_FUNC(__udivsi3)
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cmp r1, #0
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cmpne r0, #0
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stmfd sp!, {r4, r5, r7, lr}
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add r7, sp, #8
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beq L2
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clz r2, r1
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clz r3, r0
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rsb r3, r3, r2
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cmp r3, #31
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bhi L2
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ldmfdeq sp!, {r4, r5, r7, pc}
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add r5, r3, #1
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rsb r3, r3, #31
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mov lr, #0
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mov r2, r0, asl r3
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mov ip, r0, lsr r5
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mov r4, lr
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b L8
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L9:
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mov r0, r2, lsr #31
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orr ip, r0, ip, asl #1
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orr r2, r3, lr
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rsb r3, ip, r1
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sub r3, r3, #1
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and r0, r1, r3, asr #31
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mov lr, r3, lsr #31
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rsb ip, r0, ip
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add r4, r4, #1
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L8:
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cmp r4, r5
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mov r3, r2, asl #1
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bne L9
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orr r0, r3, lr
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ldmfd sp!, {r4, r5, r7, pc}
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L2:
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mov r0, #0
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ldmfd sp!, {r4, r5, r7, pc}
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