2011-02-14 20:36:03 +01:00
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/*-
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2012-11-15 12:06:41 +01:00
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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2011-02-14 20:36:03 +01:00
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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2012-11-15 12:06:41 +01:00
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* by Matt Thomas of 3am Software Foundry.
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2011-02-14 20:36:03 +01:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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2012-11-15 12:06:41 +01:00
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#include <machine/asm.h>
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2011-02-14 20:36:03 +01:00
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2013-12-06 12:04:52 +01:00
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RCSID("$NetBSD: __aeabi_uldivmod.S,v 1.7 2013/08/19 03:43:07 matt Exp $")
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2011-02-14 20:36:03 +01:00
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2012-11-15 12:06:41 +01:00
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/*
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* typedef struct { unsigned long long quo, rem } ulldiv_t;
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* __value_in_regs ulldiv_t __aeabi_uldivmod(unsigned long long n,
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* unsigned long long d);
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*/
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2011-02-14 20:36:03 +01:00
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2012-11-15 12:06:41 +01:00
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ENTRY(__aeabi_uldivmod)
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2013-12-06 12:04:52 +01:00
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#ifdef __ARM_EABI__
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.fnstart
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.cfi_startproc
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#endif
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#if !defined(_KERNEL) && !defined(_STANDALONE)
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#if !defined(__thumb__)
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orrs ip, r2, r3
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beq .Ldivbyzero
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#elif defined(_ARM_ARCH_T2)
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cbnz r2, 1f
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cbz r3, .Ldivbyzero
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1:
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#else
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cmp r2, #0
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bne 1f
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cmp r3, #0
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beq .Ldivbyzero
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1:
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#endif
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#endif
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2012-11-15 12:06:41 +01:00
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push {r4,lr}
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2013-12-06 12:04:52 +01:00
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#ifdef __ARM_EABI__
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.save {r4,lr}
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.cfi_def_cfa_offset 8
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.cfi_offset 14, -4
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.cfi_offset 4, -8
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#endif
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sub sp, sp, #16
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#ifdef __ARM_EABI__
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.cfi_def_cfa_offset 24
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#endif
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#if !defined(__thumb__) || defined(_ARM_ARCH_T2)
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add r4, sp, #8
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#else
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2012-11-15 12:06:41 +01:00
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mov r4, sp
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2013-12-06 12:04:52 +01:00
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adds r4, r4, #8
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#endif
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str r4, [sp]
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2012-11-15 12:06:41 +01:00
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bl PLT_SYM(__qdivrem)
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2013-12-06 12:04:52 +01:00
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add sp, sp, #8
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#ifdef __ARM_EABI__
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.cfi_def_cfa_offset 16
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.cfi_offset 3, -12
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.cfi_offset 2, -16
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#endif
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2012-11-15 12:06:41 +01:00
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/*
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* The remainder is already on the stack just waiting to be popped
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* into r2/r3.
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*/
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2013-12-06 12:04:52 +01:00
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pop {r2-r4,pc}
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#if !defined(_KERNEL) && !defined(_STANDALONE)
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.Ldivbyzero:
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push {r0-r1,r4,lr}
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#ifdef __ARM_EABI__
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.save {r0-r1,r4,lr}
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.cfi_def_cfa_offset 16
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.cfi_offset 14, -4
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.cfi_offset 4, -8
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#endif
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#ifdef __thumb__
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movs r0, #0
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mvns r0, r0
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#else
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mvn r0, #0
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#endif
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mvns r1, r0
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bl PLT_SYM(__aeabi_ldiv0)
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pop {r2-r4,pc}
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#endif
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#ifdef __ARM_EABI__
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.cfi_endproc
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.fnend
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#endif
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2012-11-15 12:06:41 +01:00
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END(__aeabi_uldivmod)
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