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audk/ArmPkg/Library/CompilerIntrinsicsLib/Arm/uldiv.S

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ArmAsm
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//------------------------------------------------------------------------------
//
// Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
//
// 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
GCC_ASM_EXPORT(__aeabi_uldivmod)
//
//UINT64
//EFIAPI
//__aeabi_uldivmod (
// IN UINT64 Dividend
// IN UINT64 Divisor
// )
//
ASM_PFX(__aeabi_uldivmod):
stmdb sp!, {r4, r5, r6, lr}
mov r4, r1
mov r5, r0
mov r6, #0 // 0x0
orrs ip, r3, r2, lsr #31
bne ASM_PFX(__aeabi_uldivmod_label1)
tst r2, r2
beq ASM_PFX(_ll_div0)
movs ip, r2, lsr #15
addeq r6, r6, #16 // 0x10
mov ip, r2, lsl r6
movs lr, ip, lsr #23
moveq ip, ip, lsl #8
addeq r6, r6, #8 // 0x8
movs lr, ip, lsr #27
moveq ip, ip, lsl #4
addeq r6, r6, #4 // 0x4
movs lr, ip, lsr #29
moveq ip, ip, lsl #2
addeq r6, r6, #2 // 0x2
movs lr, ip, lsr #30
moveq ip, ip, lsl #1
addeq r6, r6, #1 // 0x1
b ASM_PFX(_ll_udiv_small)
ASM_PFX(__aeabi_uldivmod_label1):
tst r3, #-2147483648 // 0x80000000
bne ASM_PFX(__aeabi_uldivmod_label2)
movs ip, r3, lsr #15
addeq r6, r6, #16 // 0x10
mov ip, r3, lsl r6
movs lr, ip, lsr #23
moveq ip, ip, lsl #8
addeq r6, r6, #8 // 0x8
movs lr, ip, lsr #27
moveq ip, ip, lsl #4
addeq r6, r6, #4 // 0x4
movs lr, ip, lsr #29
moveq ip, ip, lsl #2
addeq r6, r6, #2 // 0x2
movs lr, ip, lsr #30
addeq r6, r6, #1 // 0x1
rsb r3, r6, #32 // 0x20
moveq ip, ip, lsl #1
orr ip, ip, r2, lsr r3
mov lr, r2, lsl r6
b ASM_PFX(_ll_udiv_big)
ASM_PFX(__aeabi_uldivmod_label2):
mov ip, r3
mov lr, r2
b ASM_PFX(_ll_udiv_ginormous)
ASM_PFX(_ll_udiv_small):
cmp r4, ip, lsl #1
mov r3, #0 // 0x0
subcs r4, r4, ip, lsl #1
addcs r3, r3, #2 // 0x2
cmp r4, ip
subcs r4, r4, ip
adcs r3, r3, #0 // 0x0
add r2, r6, #32 // 0x20
cmp r2, #32 // 0x20
rsb ip, ip, #0 // 0x0
bcc ASM_PFX(_ll_udiv_small_label1)
orrs r0, r4, r5, lsr #30
moveq r4, r5
moveq r5, #0 // 0x0
subeq r2, r2, #32 // 0x20
ASM_PFX(_ll_udiv_small_label1):
mov r1, #0 // 0x0
cmp r2, #16 // 0x10
bcc ASM_PFX(_ll_udiv_small_label2)
movs r0, r4, lsr #14
moveq r4, r4, lsl #16
addeq r1, r1, #16 // 0x10
ASM_PFX(_ll_udiv_small_label2):
sub lr, r2, r1
cmp lr, #8 // 0x8
bcc ASM_PFX(_ll_udiv_small_label3)
movs r0, r4, lsr #22
moveq r4, r4, lsl #8
addeq r1, r1, #8 // 0x8
ASM_PFX(_ll_udiv_small_label3):
rsb r0, r1, #32 // 0x20
sub r2, r2, r1
orr r4, r4, r5, lsr r0
mov r5, r5, lsl r1
cmp r2, #1 // 0x1
bcc ASM_PFX(_ll_udiv_small_label5)
sub r2, r2, #1 // 0x1
and r0, r2, #7 // 0x7
eor r0, r0, #7 // 0x7
adds r0, r0, r0, lsl #1
add pc, pc, r0, lsl #2
nop // (mov r0,r0)
ASM_PFX(_ll_udiv_small_label4):
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
rsbcc r4, ip, r4
adcs r5, r5, r5
adcs r4, ip, r4, lsl #1
sub r2, r2, #8 // 0x8
tst r2, r2
rsbcc r4, ip, r4
bpl ASM_PFX(_ll_udiv_small_label4)
ASM_PFX(_ll_udiv_small_label5):
mov r2, r4, lsr r6
bic r4, r4, r2, lsl r6
adcs r0, r5, r5
adc r1, r4, r4
add r1, r1, r3, lsl r6
mov r3, #0 // 0x0
ldmia sp!, {r4, r5, r6, pc}
ASM_PFX(_ll_udiv_big):
subs r0, r5, lr
mov r3, #0 // 0x0
sbcs r1, r4, ip
movcs r5, r0
movcs r4, r1
adcs r3, r3, #0 // 0x0
subs r0, r5, lr
sbcs r1, r4, ip
movcs r5, r0
movcs r4, r1
adcs r3, r3, #0 // 0x0
subs r0, r5, lr
sbcs r1, r4, ip
movcs r5, r0
movcs r4, r1
adcs r3, r3, #0 // 0x0
mov r1, #0 // 0x0
rsbs lr, lr, #0 // 0x0
rsc ip, ip, #0 // 0x0
cmp r6, #16 // 0x10
bcc ASM_PFX(_ll_udiv_big_label1)
movs r0, r4, lsr #14
moveq r4, r4, lsl #16
addeq r1, r1, #16 // 0x10
ASM_PFX(_ll_udiv_big_label1):
sub r2, r6, r1
cmp r2, #8 // 0x8
bcc ASM_PFX(_ll_udiv_big_label2)
movs r0, r4, lsr #22
moveq r4, r4, lsl #8
addeq r1, r1, #8 // 0x8
ASM_PFX(_ll_udiv_big_label2):
rsb r0, r1, #32 // 0x20
sub r2, r6, r1
orr r4, r4, r5, lsr r0
mov r5, r5, lsl r1
cmp r2, #1 // 0x1
bcc ASM_PFX(_ll_udiv_big_label4)
sub r2, r2, #1 // 0x1
and r0, r2, #3 // 0x3
rsb r0, r0, #3 // 0x3
adds r0, r0, r0, lsl #1
add pc, pc, r0, lsl #3
nop // (mov r0,r0)
ASM_PFX(_ll_udiv_big_label3):
adcs r5, r5, r5
adcs r4, r4, r4
adcs r0, lr, r5
adcs r1, ip, r4
movcs r5, r0
movcs r4, r1
adcs r5, r5, r5
adcs r4, r4, r4
adcs r0, lr, r5
adcs r1, ip, r4
movcs r5, r0
movcs r4, r1
adcs r5, r5, r5
adcs r4, r4, r4
adcs r0, lr, r5
adcs r1, ip, r4
movcs r5, r0
movcs r4, r1
sub r2, r2, #4 // 0x4
adcs r5, r5, r5
adcs r4, r4, r4
adcs r0, lr, r5
adcs r1, ip, r4
tst r2, r2
movcs r5, r0
movcs r4, r1
bpl ASM_PFX(_ll_udiv_big_label3)
ASM_PFX(_ll_udiv_big_label4):
mov r1, #0 // 0x0
mov r2, r5, lsr r6
bic r5, r5, r2, lsl r6
adcs r0, r5, r5
adc r1, r1, #0 // 0x0
movs lr, r3, lsl r6
mov r3, r4, lsr r6
bic r4, r4, r3, lsl r6
adc r1, r1, #0 // 0x0
adds r0, r0, lr
orr r2, r2, r4, ror r6
adc r1, r1, #0 // 0x0
ldmia sp!, {r4, r5, r6, pc}
ASM_PFX(_ll_udiv_ginormous):
subs r2, r5, lr
mov r1, #0 // 0x0
sbcs r3, r4, ip
adc r0, r1, r1
movcc r2, r5
movcc r3, r4
ldmia sp!, {r4, r5, r6, pc}
ASM_PFX(_ll_div0):
ldmia sp!, {r4, r5, r6, lr}
mov r0, #0 // 0x0
mov r1, #0 // 0x0
b ASM_PFX(__aeabi_ldiv0)
ASM_PFX(__aeabi_ldiv0):
bx r14
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