| /* libgcc1 routines for 68000 w/o floating-point hardware. |
| Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc. |
| |
| This file is part of GNU CC. |
| |
| GNU CC is free software; you can redistribute it and/or modify it |
| under the terms of the GNU General Public License as published by the |
| Free Software Foundation; either version 2, or (at your option) any |
| later version. |
| |
| In addition to the permissions in the GNU General Public License, the |
| Free Software Foundation gives you unlimited permission to link the |
| compiled version of this file with other programs, and to distribute |
| those programs without any restriction coming from the use of this |
| file. (The General Public License restrictions do apply in other |
| respects; for example, they cover modification of the file, and |
| distribution when not linked into another program.) |
| |
| This file is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. */ |
| |
| /* As a special exception, if you link this library with files |
| compiled with GCC to produce an executable, this does not cause |
| the resulting executable to be covered by the GNU General Public License. |
| This exception does not however invalidate any other reasons why |
| the executable file might be covered by the GNU General Public License. */ |
| |
| /* Use this one for any 680x0; assumes no floating point hardware. |
| The trailing " '" appearing on some lines is for ANSI preprocessors. Yuk. |
| Some of this code comes from MINIX, via the folks at ericsson. |
| D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992 |
| */ |
| |
| #include <asm/export.h> |
| |
| /* These are predefined by new versions of GNU cpp. */ |
| |
| #ifndef __USER_LABEL_PREFIX__ |
| #define __USER_LABEL_PREFIX__ _ |
| #endif |
| |
| #ifndef __REGISTER_PREFIX__ |
| #define __REGISTER_PREFIX__ |
| #endif |
| |
| #ifndef __IMMEDIATE_PREFIX__ |
| #define __IMMEDIATE_PREFIX__ # |
| #endif |
| |
| /* ANSI concatenation macros. */ |
| |
| #define CONCAT1(a, b) CONCAT2(a, b) |
| #define CONCAT2(a, b) a ## b |
| |
| /* Use the right prefix for global labels. */ |
| |
| #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) |
| |
| /* Use the right prefix for registers. */ |
| |
| #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) |
| |
| /* Use the right prefix for immediate values. */ |
| |
| #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x) |
| |
| #define d0 REG (d0) |
| #define d1 REG (d1) |
| #define d2 REG (d2) |
| #define d3 REG (d3) |
| #define d4 REG (d4) |
| #define d5 REG (d5) |
| #define d6 REG (d6) |
| #define d7 REG (d7) |
| #define a0 REG (a0) |
| #define a1 REG (a1) |
| #define a2 REG (a2) |
| #define a3 REG (a3) |
| #define a4 REG (a4) |
| #define a5 REG (a5) |
| #define a6 REG (a6) |
| #define fp REG (fp) |
| #define sp REG (sp) |
| |
| .text |
| .proc |
| .globl SYM (__divsi3) |
| SYM (__divsi3): |
| movel d2, sp@- |
| |
| moveq IMM (1), d2 /* sign of result stored in d2 (=1 or =-1) */ |
| movel sp@(12), d1 /* d1 = divisor */ |
| jpl L1 |
| negl d1 |
| #if !(defined(__mcf5200__) || defined(__mcoldfire__)) |
| negb d2 /* change sign because divisor <0 */ |
| #else |
| negl d2 /* change sign because divisor <0 */ |
| #endif |
| L1: movel sp@(8), d0 /* d0 = dividend */ |
| jpl L2 |
| negl d0 |
| #if !(defined(__mcf5200__) || defined(__mcoldfire__)) |
| negb d2 |
| #else |
| negl d2 |
| #endif |
| |
| L2: movel d1, sp@- |
| movel d0, sp@- |
| jbsr SYM (__udivsi3) /* divide abs(dividend) by abs(divisor) */ |
| addql IMM (8), sp |
| |
| tstb d2 |
| jpl L3 |
| negl d0 |
| |
| L3: movel sp@+, d2 |
| rts |
| |
| EXPORT_SYMBOL(__divsi3) |