1/*- 2 * Copyright (c) 2012 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Matt Thomas of 3am Software Foundry. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30#include <machine/asm.h> 31 32RCSID("$NetBSD: __aeabi_uldivmod.S,v 1.9 2014/05/06 16:02:11 joerg Exp $") 33 34/* 35 * typedef struct { unsigned long long quo, rem } ulldiv_t; 36 * __value_in_regs ulldiv_t __aeabi_uldivmod(unsigned long long n, 37 * unsigned long long d); 38 */ 39 40ENTRY(__aeabi_uldivmod) 41#ifdef __ARM_EABI__ 42# if !defined(__ARM_DWARF_EH__) 43 .fnstart 44#endif 45 .cfi_startproc 46#endif 47#if !defined(_KERNEL) && !defined(_STANDALONE) 48#if !defined(__thumb__) 49 orrs ip, r2, r3 50 beq .Ldivbyzero 51#elif defined(_ARM_ARCH_T2) 52 cbnz r2, 1f 53 cbz r3, .Ldivbyzero 541: 55#else 56 cmp r2, #0 57 bne 1f 58 cmp r3, #0 59 beq .Ldivbyzero 601: 61#endif 62#endif 63 64 push {r4,lr} 65#ifdef __ARM_EABI__ 66# if !defined(__ARM_DWARF_EH__) 67 .save {r4,lr} 68# endif 69 .cfi_def_cfa_offset 8 70 .cfi_offset 14, -4 71 .cfi_offset 4, -8 72#endif 73 sub sp, sp, #16 74#ifdef __ARM_EABI__ 75 .cfi_def_cfa_offset 24 76#endif 77#if !defined(__thumb__) || defined(_ARM_ARCH_T2) 78 add r4, sp, #8 79#else 80 mov r4, sp 81 adds r4, r4, #8 82#endif 83 str r4, [sp] 84 bl PLT_SYM(__qdivrem) 85 add sp, sp, #8 86#ifdef __ARM_EABI__ 87 .cfi_def_cfa_offset 16 88 .cfi_offset 3, -12 89 .cfi_offset 2, -16 90#endif 91 /* 92 * The remainder is already on the stack just waiting to be popped 93 * into r2/r3. 94 */ 95 pop {r2-r4,pc} 96 97#if !defined(_KERNEL) && !defined(_STANDALONE) 98.Ldivbyzero: 99 push {r0-r1,r4,lr} 100#ifdef __ARM_EABI__ 101# if !defined(__ARM_DWARF_EH__) 102 .save {r0-r1,r4,lr} 103# endif 104 .cfi_def_cfa_offset 16 105 .cfi_offset 14, -4 106 .cfi_offset 4, -8 107#endif 108#ifdef __thumb__ 109 movs r0, #0 110 mvns r0, r0 111#else 112 mvn r0, #0 113#endif 114 movs r1, r0 115 bl PLT_SYM(__aeabi_ldiv0) 116 pop {r2-r4,pc} 117#endif 118#ifdef __ARM_EABI__ 119 .cfi_endproc 120# if !defined(__ARM_DWARF_EH__) 121 .fnend 122# endif 123#endif 124END(__aeabi_uldivmod) 125