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