projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 7c650d4e GCI |
1 | .file "poly_div.S" |
| 2 | /* | |
| 3 | * poly_div.S | |
| 4 | * | |
| 5 | * A set of functions to divide 64 bit integers by fixed numbers. | |
| 6 | * | |
| 7 | * | |
| fb0297e9 PR |
8 | * Copyright (C) 1992,1993,1994 |
| 9 | * W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | |
| 10 | * Australia. E-mail billm@vaxc.cc.monash.edu.au | |
| 7c650d4e GCI |
11 | * All rights reserved. |
| 12 | * | |
| 13 | * This copyright notice covers the redistribution and use of the | |
| 14 | * FPU emulator developed by W. Metzenthen. It covers only its use | |
| fb0297e9 PR |
15 | * in the 386BSD, FreeBSD and NetBSD operating systems. Any other |
| 16 | * use is not permitted under this copyright. | |
| 7c650d4e GCI |
17 | * |
| 18 | * Redistribution and use in source and binary forms, with or without | |
| 19 | * modification, are permitted provided that the following conditions | |
| 20 | * are met: | |
| 21 | * 1. Redistributions of source code must retain the above copyright | |
| 22 | * notice, this list of conditions and the following disclaimer. | |
| 23 | * 2. Redistributions in binary form must include information specifying | |
| 24 | * that source code for the emulator is freely available and include | |
| 25 | * either: | |
| 26 | * a) an offer to provide the source code for a nominal distribution | |
| 27 | * fee, or | |
| 28 | * b) list at least two alternative methods whereby the source | |
| 29 | * can be obtained, e.g. a publically accessible bulletin board | |
| 30 | * and an anonymous ftp site from which the software can be | |
| 31 | * downloaded. | |
| 32 | * 3. All advertising materials specifically mentioning features or use of | |
| 33 | * this emulator must acknowledge that it was developed by W. Metzenthen. | |
| 34 | * 4. The name of W. Metzenthen may not be used to endorse or promote | |
| 35 | * products derived from this software without specific prior written | |
| 36 | * permission. | |
| 37 | * | |
| 38 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, | |
| 39 | * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | |
| 40 | * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL | |
| 41 | * W. METZENTHEN BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 42 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 43 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 44 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 45 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 46 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 47 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 48 | * | |
| ffb8a815 | 49 | * |
| fb0297e9 PR |
50 | * The purpose of this copyright, based upon the Berkeley copyright, is to |
| 51 | * ensure that the covered software remains freely available to everyone. | |
| 52 | * | |
| 53 | * The software (with necessary differences) is also available, but under | |
| 54 | * the terms of the GNU copyleft, for the Linux operating system and for | |
| 55 | * the djgpp ms-dos extender. | |
| 56 | * | |
| 57 | * W. Metzenthen June 1994. | |
| 58 | * | |
| 59 | * | |
| 60 | * $Id: poly_div.s,v 1.2 1994/04/29 21:23:27 gclarkii Exp $ | |
| ffb8a815 | 61 | * |
| 7c650d4e GCI |
62 | */ |
| 63 | ||
| 64 | #include "fpu_asm.h" | |
| 65 | ||
| 66 | .text | |
| 67 | ||
| 68 | /*---------------------------------------------------------------------------*/ | |
| 69 | .align 2,144 | |
| 70 | .globl _poly_div2 | |
| 71 | _poly_div2: | |
| 72 | pushl %ebp | |
| 73 | movl %esp,%ebp | |
| 74 | ||
| 75 | movl PARAM1,%ecx | |
| 76 | movw (%ecx),%ax | |
| 77 | ||
| 78 | shrl $1,4(%ecx) | |
| 79 | rcrl $1,(%ecx) | |
| 80 | ||
| 81 | testw $1,%ax | |
| 82 | je poly_div2_exit | |
| 83 | ||
| 84 | addl $1,(%ecx) | |
| 85 | adcl $0,4(%ecx) | |
| 86 | poly_div2_exit: | |
| 87 | ||
| 88 | leave | |
| 89 | ret | |
| 90 | /*---------------------------------------------------------------------------*/ | |
| 91 | .align 2,144 | |
| 92 | .globl _poly_div4 | |
| 93 | _poly_div4: | |
| 94 | pushl %ebp | |
| 95 | movl %esp,%ebp | |
| 96 | ||
| 97 | movl PARAM1,%ecx | |
| 98 | movw (%ecx),%ax | |
| 99 | ||
| 100 | movl 4(%ecx),%edx | |
| 101 | shll $30,%edx | |
| 102 | ||
| 103 | shrl $2,4(%ecx) | |
| 104 | shrl $2,(%ecx) | |
| 105 | ||
| 106 | orl %edx,(%ecx) | |
| 107 | ||
| 108 | testw $2,%ax | |
| 109 | je poly_div4_exit | |
| 110 | ||
| 111 | addl $1,(%ecx) | |
| 112 | adcl $0,4(%ecx) | |
| 113 | poly_div4_exit: | |
| 114 | ||
| 115 | leave | |
| 116 | ret | |
| 117 | /*---------------------------------------------------------------------------*/ | |
| 118 | .align 2,144 | |
| 119 | .globl _poly_div16 | |
| 120 | _poly_div16: | |
| 121 | pushl %ebp | |
| 122 | movl %esp,%ebp | |
| 123 | ||
| 124 | movl PARAM1,%ecx | |
| 125 | movw (%ecx),%ax | |
| 126 | ||
| 127 | movl 4(%ecx),%edx | |
| 128 | shll $28,%edx | |
| 129 | ||
| 130 | shrl $4,4(%ecx) | |
| 131 | shrl $4,(%ecx) | |
| 132 | ||
| 133 | orl %edx,(%ecx) | |
| 134 | ||
| 135 | testw $8,%ax | |
| 136 | je poly_div16_exit | |
| 137 | ||
| 138 | addl $1,(%ecx) | |
| 139 | adcl $0,4(%ecx) | |
| 140 | poly_div16_exit: | |
| 141 | ||
| 142 | leave | |
| 143 | ret | |
| 144 | /*---------------------------------------------------------------------------*/ |