1 /* libgcc1 routines for 68000 w/o floating-poi 1 /* libgcc1 routines for 68000 w/o floating-point hardware.
2 Copyright (C) 1994, 1996, 1997, 1998 Free S 2 Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc.
3 3
4 This file is part of GNU CC. 4 This file is part of GNU CC.
5 5
6 GNU CC is free software; you can redistribute 6 GNU CC is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public Lice 7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or 8 Free Software Foundation; either version 2, or (at your option) any
9 later version. 9 later version.
10 10
11 In addition to the permissions in the GNU Gene 11 In addition to the permissions in the GNU General Public License, the
12 Free Software Foundation gives you unlimited p 12 Free Software Foundation gives you unlimited permission to link the
13 compiled version of this file with other progr 13 compiled version of this file with other programs, and to distribute
14 those programs without any restriction coming 14 those programs without any restriction coming from the use of this
15 file. (The General Public License restriction 15 file. (The General Public License restrictions do apply in other
16 respects; for example, they cover modification 16 respects; for example, they cover modification of the file, and
17 distribution when not linked into another prog 17 distribution when not linked into another program.)
18 18
19 This file is distributed in the hope that it w 19 This file is distributed in the hope that it will be useful, but
20 WITHOUT ANY WARRANTY; without even the implied 20 WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PU 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22 General Public License for more details. */ 22 General Public License for more details. */
23 23
24 /* As a special exception, if you link this li 24 /* As a special exception, if you link this library with files
25 compiled with GCC to produce an executable, 25 compiled with GCC to produce an executable, this does not cause
26 the resulting executable to be covered by t 26 the resulting executable to be covered by the GNU General Public License.
27 This exception does not however invalidate 27 This exception does not however invalidate any other reasons why
28 the executable file might be covered by the 28 the executable file might be covered by the GNU General Public License. */
29 29
30 /* Use this one for any 680x0; assumes no floa 30 /* Use this one for any 680x0; assumes no floating point hardware.
31 The trailing " '" appearing on some lines i 31 The trailing " '" appearing on some lines is for ANSI preprocessors. Yuk.
32 Some of this code comes from MINIX, via the 32 Some of this code comes from MINIX, via the folks at ericsson.
33 D. V. Henkel-Wallace (gumby@cygnus.com) Fet 33 D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992
34 */ 34 */
35 35
36 #include <linux/export.h> 36 #include <linux/export.h>
37 37
38 /* These are predefined by new versions of GNU 38 /* These are predefined by new versions of GNU cpp. */
39 39
40 #ifndef __USER_LABEL_PREFIX__ 40 #ifndef __USER_LABEL_PREFIX__
41 #define __USER_LABEL_PREFIX__ _ 41 #define __USER_LABEL_PREFIX__ _
42 #endif 42 #endif
43 43
44 #ifndef __REGISTER_PREFIX__ 44 #ifndef __REGISTER_PREFIX__
45 #define __REGISTER_PREFIX__ 45 #define __REGISTER_PREFIX__
46 #endif 46 #endif
47 47
48 #ifndef __IMMEDIATE_PREFIX__ 48 #ifndef __IMMEDIATE_PREFIX__
49 #define __IMMEDIATE_PREFIX__ # 49 #define __IMMEDIATE_PREFIX__ #
50 #endif 50 #endif
51 51
52 /* ANSI concatenation macros. */ 52 /* ANSI concatenation macros. */
53 53
54 #define CONCAT1(a, b) CONCAT2(a, b) 54 #define CONCAT1(a, b) CONCAT2(a, b)
55 #define CONCAT2(a, b) a ## b 55 #define CONCAT2(a, b) a ## b
56 56
57 /* Use the right prefix for global labels. */ 57 /* Use the right prefix for global labels. */
58 58
59 #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, 59 #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
60 60
61 /* Use the right prefix for registers. */ 61 /* Use the right prefix for registers. */
62 62
63 #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x 63 #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x)
64 64
65 /* Use the right prefix for immediate values. 65 /* Use the right prefix for immediate values. */
66 66
67 #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, 67 #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x)
68 68
69 #define d0 REG (d0) 69 #define d0 REG (d0)
70 #define d1 REG (d1) 70 #define d1 REG (d1)
71 #define d2 REG (d2) 71 #define d2 REG (d2)
72 #define d3 REG (d3) 72 #define d3 REG (d3)
73 #define d4 REG (d4) 73 #define d4 REG (d4)
74 #define d5 REG (d5) 74 #define d5 REG (d5)
75 #define d6 REG (d6) 75 #define d6 REG (d6)
76 #define d7 REG (d7) 76 #define d7 REG (d7)
77 #define a0 REG (a0) 77 #define a0 REG (a0)
78 #define a1 REG (a1) 78 #define a1 REG (a1)
79 #define a2 REG (a2) 79 #define a2 REG (a2)
80 #define a3 REG (a3) 80 #define a3 REG (a3)
81 #define a4 REG (a4) 81 #define a4 REG (a4)
82 #define a5 REG (a5) 82 #define a5 REG (a5)
83 #define a6 REG (a6) 83 #define a6 REG (a6)
84 #define fp REG (fp) 84 #define fp REG (fp)
85 #define sp REG (sp) 85 #define sp REG (sp)
86 86
87 .text 87 .text
88 .proc 88 .proc
89 .globl SYM (__divsi3) 89 .globl SYM (__divsi3)
90 SYM (__divsi3): 90 SYM (__divsi3):
91 movel d2, sp@- 91 movel d2, sp@-
92 92
93 moveq IMM (1), d2 /* sign of res 93 moveq IMM (1), d2 /* sign of result stored in d2 (=1 or =-1) */
94 movel sp@(12), d1 /* d1 = diviso 94 movel sp@(12), d1 /* d1 = divisor */
95 jpl L1 95 jpl L1
96 negl d1 96 negl d1
97 #if !(defined(__mcf5200__) || defined(__mcoldf 97 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
98 negb d2 /* change sign 98 negb d2 /* change sign because divisor <0 */
99 #else 99 #else
100 negl d2 /* change sign 100 negl d2 /* change sign because divisor <0 */
101 #endif 101 #endif
102 L1: movel sp@(8), d0 /* d0 = divide 102 L1: movel sp@(8), d0 /* d0 = dividend */
103 jpl L2 103 jpl L2
104 negl d0 104 negl d0
105 #if !(defined(__mcf5200__) || defined(__mcoldf 105 #if !(defined(__mcf5200__) || defined(__mcoldfire__))
106 negb d2 106 negb d2
107 #else 107 #else
108 negl d2 108 negl d2
109 #endif 109 #endif
110 110
111 L2: movel d1, sp@- 111 L2: movel d1, sp@-
112 movel d0, sp@- 112 movel d0, sp@-
113 jbsr SYM (__udivsi3) /* divide abs( 113 jbsr SYM (__udivsi3) /* divide abs(dividend) by abs(divisor) */
114 addql IMM (8), sp 114 addql IMM (8), sp
115 115
116 tstb d2 116 tstb d2
117 jpl L3 117 jpl L3
118 negl d0 118 negl d0
119 119
120 L3: movel sp@+, d2 120 L3: movel sp@+, d2
121 rts 121 rts
122 122
123 EXPORT_SYMBOL(__divsi3) 123 EXPORT_SYMBOL(__divsi3)
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