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__aeabi_uldivmod.S revision 1.5 
      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 
     32 RCSID("$NetBSD: __aeabi_uldivmod.S,v 1.5 2013/05/08 05:13:56 matt 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 
     40 ENTRY(__aeabi_uldivmod)
     41 	orrs	ip, r2, r3
     42 	beq	.Ldivbyzero
     43 
     44 	push	{r4,lr}
     45 	sub	sp, sp, #16
     46 	add	ip, sp, #8
     47 	str	ip, [sp]
     48 	bl	PLT_SYM(__qdivrem)
     49 	add	sp, sp, #8
     50 	/*
     51 	 * The remainder is already on the stack just waiting to be popped
     52 	 * into r2/r3.
     53 	 */
     54 	pop	{r2-r4,lr}
     55 	RET
     56 
     57 .Ldivbyzero:
     58 	push	{r0-r1,ip,lr}
     59 	mvn	r0, #0
     60 	mvn	r1, #0
     61 	bl	PLT_SYM(__aeabi_ldiv0)
     62 	pop	{r2-r3,ip,lr}
     63 	RET
     64 END(__aeabi_uldivmod)
     65