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/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Matt Thomas of 3am Software Foundry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
RCSID("$NetBSD: __aeabi_uldivmod.S,v 1.9 2014/05/06 16:02:11 joerg Exp $")
/*
* typedef struct { unsigned long long quo, rem } ulldiv_t;
* __value_in_regs ulldiv_t __aeabi_uldivmod(unsigned long long n,
* unsigned long long d);
*/
ENTRY(__aeabi_uldivmod)
#ifdef __ARM_EABI__
# if !defined(__ARM_DWARF_EH__)
.fnstart
#endif
.cfi_startproc
#endif
#if !defined(_KERNEL) && !defined(_STANDALONE)
#if !defined(__thumb__)
orrs ip, r2, r3
beq .Ldivbyzero
#elif defined(_ARM_ARCH_T2)
cbnz r2, 1f
cbz r3, .Ldivbyzero
1:
#else
cmp r2, #0
bne 1f
cmp r3, #0
beq .Ldivbyzero
1:
#endif
#endif
push {r4,lr}
#ifdef __ARM_EABI__
# if !defined(__ARM_DWARF_EH__)
.save {r4,lr}
# endif
.cfi_def_cfa_offset 8
.cfi_offset 14, -4
.cfi_offset 4, -8
#endif
sub sp, sp, #16
#ifdef __ARM_EABI__
.cfi_def_cfa_offset 24
#endif
#if !defined(__thumb__) || defined(_ARM_ARCH_T2)
add r4, sp, #8
#else
mov r4, sp
adds r4, r4, #8
#endif
str r4, [sp]
bl PLT_SYM(__qdivrem)
add sp, sp, #8
#ifdef __ARM_EABI__
.cfi_def_cfa_offset 16
.cfi_offset 3, -12
.cfi_offset 2, -16
#endif
/*
* The remainder is already on the stack just waiting to be popped
* into r2/r3.
*/
pop {r2-r4,pc}
#if !defined(_KERNEL) && !defined(_STANDALONE)
.Ldivbyzero:
push {r0-r1,r4,lr}
#ifdef __ARM_EABI__
# if !defined(__ARM_DWARF_EH__)
.save {r0-r1,r4,lr}
# endif
.cfi_def_cfa_offset 16
.cfi_offset 14, -4
.cfi_offset 4, -8
#endif
#ifdef __thumb__
movs r0, #0
mvns r0, r0
#else
mvn r0, #0
#endif
movs r1, r0
bl PLT_SYM(__aeabi_ldiv0)
pop {r2-r4,pc}
#endif
#ifdef __ARM_EABI__
.cfi_endproc
# if !defined(__ARM_DWARF_EH__)
.fnend
# endif
#endif
END(__aeabi_uldivmod)
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