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