1/* libgcc1 routines for 68000 w/o floating-point hardware. 2 Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc. 3 4This file is part of GNU CC. 5 6GNU CC is free software; you can redistribute it and/or modify it 7under the terms of the GNU General Public License as published by the 8Free Software Foundation; either version 2, or (at your option) any 9later version. 10 11In addition to the permissions in the GNU General Public License, the 12Free Software Foundation gives you unlimited permission to link the 13compiled version of this file with other programs, and to distribute 14those programs without any restriction coming from the use of this 15file. (The General Public License restrictions do apply in other 16respects; for example, they cover modification of the file, and 17distribution when not linked into another program.) 18 19This file is distributed in the hope that it will be useful, but 20WITHOUT ANY WARRANTY; without even the implied warranty of 21MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22General Public License for more details. */ 23 24/* As a special exception, if you link this library with files 25 compiled with GCC to produce an executable, this does not cause 26 the resulting executable to be covered by the GNU General Public License. 27 This exception does not however invalidate any other reasons why 28 the executable file might be covered by the GNU General Public License. */ 29 30/* Use this one for any 680x0; assumes no floating point hardware. 31 The trailing " '" appearing on some lines is for ANSI preprocessors. Yuk. 32 Some of this code comes from MINIX, via the folks at ericsson. 33 D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992 34*/ 35 36/* These are predefined by new versions of GNU cpp. */ 37 38#ifndef __USER_LABEL_PREFIX__ 39#define __USER_LABEL_PREFIX__ _ 40#endif 41 42#ifndef __REGISTER_PREFIX__ 43#define __REGISTER_PREFIX__ 44#endif 45 46#ifndef __IMMEDIATE_PREFIX__ 47#define __IMMEDIATE_PREFIX__ # 48#endif 49 50/* ANSI concatenation macros. */ 51 52#define CONCAT1(a, b) CONCAT2(a, b) 53#define CONCAT2(a, b) a ## b 54 55/* Use the right prefix for global labels. */ 56 57#define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) 58 59/* Use the right prefix for registers. */ 60 61#define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) 62 63/* Use the right prefix for immediate values. */ 64 65#define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x) 66 67#define d0 REG (d0) 68#define d1 REG (d1) 69#define d2 REG (d2) 70#define d3 REG (d3) 71#define d4 REG (d4) 72#define d5 REG (d5) 73#define d6 REG (d6) 74#define d7 REG (d7) 75#define a0 REG (a0) 76#define a1 REG (a1) 77#define a2 REG (a2) 78#define a3 REG (a3) 79#define a4 REG (a4) 80#define a5 REG (a5) 81#define a6 REG (a6) 82#define fp REG (fp) 83#define sp REG (sp) 84 85 .text 86 .proc 87 .globl SYM (__divsi3) 88SYM (__divsi3): 89 movel d2, sp@- 90 91 moveq IMM (1), d2 /* sign of result stored in d2 (=1 or =-1) */ 92 movel sp@(12), d1 /* d1 = divisor */ 93 jpl L1 94 negl d1 95#if !(defined(__mcf5200__) || defined(__mcoldfire__)) 96 negb d2 /* change sign because divisor <0 */ 97#else 98 negl d2 /* change sign because divisor <0 */ 99#endif 100L1: movel sp@(8), d0 /* d0 = dividend */ 101 jpl L2 102 negl d0 103#if !(defined(__mcf5200__) || defined(__mcoldfire__)) 104 negb d2 105#else 106 negl d2 107#endif 108 109L2: movel d1, sp@- 110 movel d0, sp@- 111 jbsr SYM (__udivsi3) /* divide abs(dividend) by abs(divisor) */ 112 addql IMM (8), sp 113 114 tstb d2 115 jpl L3 116 negl d0 117 118L3: movel sp@+, d2 119 rts 120 121