sdivsi3_i4i.S revision 1.1
1 1.1 uwe /* $NetBSD: sdivsi3_i4i.S,v 1.1 2011/08/04 03:20:09 uwe Exp $ */ 2 1.1 uwe 3 1.1 uwe /*- 4 1.1 uwe * Copyright (c) 1990 The Regents of the University of California. 5 1.1 uwe * All rights reserved. 6 1.1 uwe * 7 1.1 uwe * This code is derived from software contributed to Berkeley by 8 1.1 uwe * William Jolitz. 9 1.1 uwe * 10 1.1 uwe * Redistribution and use in source and binary forms, with or without 11 1.1 uwe * modification, are permitted provided that the following conditions 12 1.1 uwe * are met: 13 1.1 uwe * 1. Redistributions of source code must retain the above copyright 14 1.1 uwe * notice, this list of conditions and the following disclaimer. 15 1.1 uwe * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 uwe * notice, this list of conditions and the following disclaimer in the 17 1.1 uwe * documentation and/or other materials provided with the distribution. 18 1.1 uwe * 3. Neither the name of the University nor the names of its contributors 19 1.1 uwe * may be used to endorse or promote products derived from this software 20 1.1 uwe * without specific prior written permission. 21 1.1 uwe * 22 1.1 uwe * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 uwe * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 uwe * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 uwe * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 uwe * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 uwe * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 uwe * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 uwe * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 uwe * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 uwe * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 uwe * SUCH DAMAGE. 33 1.1 uwe * 34 1.1 uwe * from: @(#)udivsi3.s 5.1 (Berkeley) 5/15/90 35 1.1 uwe */ 36 1.1 uwe 37 1.1 uwe #include <machine/asm.h> 38 1.1 uwe #if defined(LIBC_SCCS) 39 1.1 uwe RCSID("$NetBSD: sdivsi3_i4i.S,v 1.1 2011/08/04 03:20:09 uwe Exp $") 40 1.1 uwe #endif 41 1.1 uwe 42 1.1 uwe /* See comments in udivsi3_i4i.S */ 43 1.1 uwe 44 1.1 uwe #ifdef __ELF__ 45 1.1 uwe .hidden __sdivsi3_i4i 46 1.1 uwe #endif 47 1.1 uwe 48 1.1 uwe 49 1.1 uwe /* r0 <= r4 / r5 */ 50 1.1 uwe NENTRY(__sdivsi3_i4i) 51 1.1 uwe mov r4, r0 52 1.1 uwe mov r5, r1 53 1.1 uwe 54 1.1 uwe tst r1, r1 55 1.1 uwe bt .L_div_by_zero 56 1.1 uwe 57 1.1 uwe !! this version cannot clobber r2 and r3, but can clobber macl/mach 58 1.1 uwe lds r2, macl 59 1.1 uwe lds r3, mach 60 1.1 uwe 61 1.1 uwe mov #0, r2 62 1.1 uwe div0s r2, r0 63 1.1 uwe subc r3, r3 64 1.1 uwe subc r2, r0 65 1.1 uwe div0s r1, r3 66 1.1 uwe #define DIVSTEP rotcl r0; div1 r1, r3 67 1.1 uwe /* repeat 32 times */ 68 1.1 uwe DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 69 1.1 uwe DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 70 1.1 uwe DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 71 1.1 uwe DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; DIVSTEP; 72 1.1 uwe #undef DIVSTEP 73 1.1 uwe rotcl r0 74 1.1 uwe 75 1.1 uwe addc r2, r0 76 1.1 uwe 77 1.1 uwe sts mach, r3 78 1.1 uwe sts macl, r2 79 1.1 uwe 80 1.1 uwe rts 81 1.1 uwe nop 82 1.1 uwe 83 1.1 uwe .L_div_by_zero: 84 1.1 uwe rts 85 1.1 uwe mov #0, r0 86
Indexes created Wed Oct 01 15:09:59 GMT 2025