sdivsi3.S revision 1.7
1 1.7 uwe /* $NetBSD: sdivsi3.S,v 1.7 2006/04/22 22:48:54 uwe Exp $ */ 2 1.1 itojun 3 1.1 itojun /*- 4 1.1 itojun * Copyright (c) 1990 The Regents of the University of California. 5 1.1 itojun * All rights reserved. 6 1.1 itojun * 7 1.1 itojun * This code is derived from software contributed to Berkeley by 8 1.1 itojun * William Jolitz. 9 1.1 itojun * 10 1.1 itojun * Redistribution and use in source and binary forms, with or without 11 1.1 itojun * modification, are permitted provided that the following conditions 12 1.1 itojun * are met: 13 1.1 itojun * 1. Redistributions of source code must retain the above copyright 14 1.1 itojun * notice, this list of conditions and the following disclaimer. 15 1.1 itojun * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 itojun * notice, this list of conditions and the following disclaimer in the 17 1.1 itojun * documentation and/or other materials provided with the distribution. 18 1.4 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 itojun * may be used to endorse or promote products derived from this software 20 1.1 itojun * without specific prior written permission. 21 1.1 itojun * 22 1.1 itojun * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 itojun * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 itojun * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 itojun * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 itojun * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 itojun * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 itojun * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 itojun * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 itojun * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 itojun * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 itojun * SUCH DAMAGE. 33 1.1 itojun * 34 1.1 itojun * from: @(#)udivsi3.s 5.1 (Berkeley) 5/15/90 35 1.1 itojun */ 36 1.1 itojun 37 1.1 itojun #include <machine/asm.h> 38 1.1 itojun #if defined(LIBC_SCCS) 39 1.7 uwe RCSID("$NetBSD: sdivsi3.S,v 1.7 2006/04/22 22:48:54 uwe Exp $") 40 1.7 uwe #endif 41 1.7 uwe 42 1.7 uwe #ifdef PIC /* XXX: uwe */ 43 1.7 uwe .hidden __sdivsi3 44 1.1 itojun #endif 45 1.1 itojun 46 1.1 itojun /* r0 <= r4 / r5 */ 47 1.7 uwe NENTRY(__sdivsi3) 48 1.2 msaitoh mov r4, r0 49 1.2 msaitoh mov r5, r1 50 1.2 msaitoh 51 1.2 msaitoh tst r1, r1 52 1.1 itojun bt div_by_zero 53 1.1 itojun 54 1.1 itojun mov #0, r2 55 1.2 msaitoh div0s r2, r0 56 1.1 itojun subc r3, r3 57 1.2 msaitoh subc r2, r0 58 1.2 msaitoh div0s r1, r3 59 1.2 msaitoh #define DIVSTEP rotcl r0; div1 r1, r3 60 1.1 itojun /* repeat 32 times */ 61 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 62 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 63 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 64 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 65 1.1 itojun #undef DIVSTEP 66 1.2 msaitoh rotcl r0 67 1.1 itojun 68 1.1 itojun rts 69 1.7 uwe addc r2, r0 70 1.1 itojun 71 1.1 itojun div_by_zero: 72 1.7 uwe #ifdef _KERNEL 73 1.1 itojun rts 74 1.7 uwe mov #0, r0 75 1.1 itojun #else 76 1.1 itojun mov.l r14, @-r15 77 1.1 itojun sts.l pr, @-r15 78 1.1 itojun mov r15, r14 79 1.1 itojun 80 1.1 itojun mov.l L_raise, r1 81 1.7 uwe #ifdef PIC 82 1.7 uwe 1: bsrf r1 83 1.7 uwe #else 84 1.1 itojun jsr @r1 85 1.7 uwe #endif 86 1.7 uwe mov #8, r4 /* delay slot. 8 <- SIGFPE. */ 87 1.1 itojun mov #0, r0 88 1.1 itojun 89 1.1 itojun lds.l @r15+, pr 90 1.1 itojun rts 91 1.7 uwe mov.l @r15+, r14 92 1.1 itojun 93 1.7 uwe .align 2 94 1.1 itojun L_raise: 95 1.7 uwe #ifdef PIC 96 1.7 uwe .long _C_LABEL(raise)-(1b+4) 97 1.7 uwe #else 98 1.7 uwe .long _C_LABEL(raise) 99 1.7 uwe #endif 100 1.1 itojun #endif 101
Indexes created Mon Sep 22 10:09:38 GMT 2025