ArmPkg/Library/CompilerIntrinsicsLib/Arm/udivsi3.S

#------------------------------------------------------------------------------ 
#
# Copyright (c) 2008-2009 Apple Inc. All rights reserved.
#
# All rights reserved. This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution.  The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php
#
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#------------------------------------------------------------------------------

	.text
	.align 2
	.globl ASM_PFX(__udivsi3)

ASM_PFX(__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
	ldmeqfd	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}