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| //------------------------------------------------------------------------------
| //
| // Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
| // Copyright (c) 2018, Pete Batard. All rights reserved.<BR>
| //
| // SPDX-License-Identifier: BSD-2-Clause-Patent
| //
| //------------------------------------------------------------------------------
|
|
| EXPORT __aeabi_uldivmod
| EXPORT __rt_udiv64
|
| AREA s___aeabi_uldivmod, CODE, READONLY, ARM
|
| ARM
|
| ;
| ;UINT64
| ;EFIAPI
| ;__rt_udiv64 (
| ; IN UINT64 Divisor
| ; IN UINT64 Dividend
| ; )
| ;
| __rt_udiv64
| ; Swap r0-r1 and r2-r3
| mov r12, r0
| mov r0, r2
| mov r2, r12
| mov r12, r1
| mov r1, r3
| mov r3, r12
| b __aeabi_uldivmod
|
| ;
| ;UINT64
| ;EFIAPI
| ;__aeabi_uldivmod (
| ; IN UINT64 Dividend
| ; IN UINT64 Divisor
| ; )
| ;
| __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 __aeabi_uldivmod_label1
| tst r2, r2
| beq _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 _ll_udiv_small
| __aeabi_uldivmod_label1
| tst r3, #-2147483648 ; 0x80000000
| bne __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 _ll_udiv_big
| __aeabi_uldivmod_label2
| mov ip, r3
| mov lr, r2
| b _ll_udiv_ginormous
|
| _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 _ll_udiv_small_label1
| orrs r0, r4, r5, lsr #30
| moveq r4, r5
| moveq r5, #0 ; 0x0
| subeq r2, r2, #32 ; 0x20
| _ll_udiv_small_label1
| mov r1, #0 ; 0x0
| cmp r2, #16 ; 0x10
| bcc _ll_udiv_small_label2
| movs r0, r4, lsr #14
| moveq r4, r4, lsl #16
| addeq r1, r1, #16 ; 0x10
| _ll_udiv_small_label2
| sub lr, r2, r1
| cmp lr, #8 ; 0x8
| bcc _ll_udiv_small_label3
| movs r0, r4, lsr #22
| moveq r4, r4, lsl #8
| addeq r1, r1, #8 ; 0x8
| _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 _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)
| _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 _ll_udiv_small_label4
| _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}
|
| _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 _ll_udiv_big_label1
| movs r0, r4, lsr #14
| moveq r4, r4, lsl #16
| addeq r1, r1, #16 ; 0x10
| _ll_udiv_big_label1
| sub r2, r6, r1
| cmp r2, #8 ; 0x8
| bcc _ll_udiv_big_label2
| movs r0, r4, lsr #22
| moveq r4, r4, lsl #8
| addeq r1, r1, #8 ; 0x8
| _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 _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)
| _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 _ll_udiv_big_label3
| _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}
|
| _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}
|
| _ll_div0
| ldmia sp!, {r4, r5, r6, lr}
| mov r0, #0 ; 0x0
| mov r1, #0 ; 0x0
| b __aeabi_ldiv0
|
| __aeabi_ldiv0
| bx r14
|
| END
|
|
