sdivsi3.S revision 1.4
1 1.4 agc /* $NetBSD: sdivsi3.S,v 1.4 2003/08/07 16:32:19 agc 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 1.4 agc RCSID("$NetBSD: sdivsi3.S,v 1.4 2003/08/07 16:32:19 agc Exp $") 40 1.1 itojun #endif 41 1.1 itojun 42 1.1 itojun /* r0 <= r4 / r5 */ 43 1.1 itojun ENTRY(__sdivsi3) 44 1.2 msaitoh mov r4, r0 45 1.2 msaitoh mov r5, r1 46 1.2 msaitoh 47 1.2 msaitoh tst r1, r1 48 1.1 itojun bt div_by_zero 49 1.1 itojun 50 1.1 itojun mov #0, r2 51 1.2 msaitoh div0s r2, r0 52 1.1 itojun subc r3, r3 53 1.2 msaitoh subc r2, r0 54 1.2 msaitoh div0s r1, r3 55 1.2 msaitoh #define DIVSTEP rotcl r0; div1 r1, r3 56 1.1 itojun /* repeat 32 times */ 57 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 58 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 59 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 60 1.1 itojun DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 61 1.1 itojun #undef DIVSTEP 62 1.2 msaitoh rotcl r0 63 1.1 itojun 64 1.1 itojun rts 65 1.2 msaitoh addc r2, r0 /* delay slot */ 66 1.1 itojun 67 1.1 itojun div_by_zero: 68 1.3 msaitoh #if defined(_KERNEL) || defined(_STANDALONE) 69 1.1 itojun rts 70 1.1 itojun mov #0, r0 /* delay slot */ 71 1.1 itojun #else 72 1.1 itojun mov.l r14, @-r15 73 1.1 itojun sts.l pr, @-r15 74 1.1 itojun mov r15, r14 75 1.1 itojun 76 1.1 itojun mov.l L_raise, r1 77 1.1 itojun jsr @r1 78 1.1 itojun mov #8, r4 /* delay slot */ 79 1.1 itojun mov #0, r0 80 1.1 itojun 81 1.1 itojun lds.l @r15+, pr 82 1.1 itojun rts 83 1.1 itojun mov.l @r15+, r14 /* delay slot */ 84 1.1 itojun 85 1.1 itojun .align 2 86 1.1 itojun L_raise: 87 1.1 itojun .long _raise 88 1.1 itojun #endif 89
Indexes created Tue Sep 23 02:09:52 GMT 2025