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Diffstat (limited to 'arch/m68knommu/lib/divsi3.S')
-rw-r--r-- | arch/m68knommu/lib/divsi3.S | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/arch/m68knommu/lib/divsi3.S b/arch/m68knommu/lib/divsi3.S new file mode 100644 index 000000000000..ec307b61991e --- /dev/null +++ b/arch/m68knommu/lib/divsi3.S | |||
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1 | /* libgcc1 routines for 68000 w/o floating-point hardware. | ||
2 | Copyright (C) 1994, 1996, 1997, 1998 Free Software Foundation, Inc. | ||
3 | |||
4 | This file is part of GNU CC. | ||
5 | |||
6 | GNU CC is free software; you can redistribute it and/or modify it | ||
7 | under the terms of the GNU General Public License as published by the | ||
8 | Free Software Foundation; either version 2, or (at your option) any | ||
9 | later version. | ||
10 | |||
11 | In addition to the permissions in the GNU General Public License, the | ||
12 | Free Software Foundation gives you unlimited permission to link the | ||
13 | compiled version of this file with other programs, and to distribute | ||
14 | those programs without any restriction coming from the use of this | ||
15 | file. (The General Public License restrictions do apply in other | ||
16 | respects; for example, they cover modification of the file, and | ||
17 | distribution when not linked into another program.) | ||
18 | |||
19 | This file is distributed in the hope that it will be useful, but | ||
20 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
22 | General Public License for more details. | ||
23 | |||
24 | You should have received a copy of the GNU General Public License | ||
25 | along with this program; see the file COPYING. If not, write to | ||
26 | the Free Software Foundation, 59 Temple Place - Suite 330, | ||
27 | Boston, MA 02111-1307, USA. */ | ||
28 | |||
29 | /* As a special exception, if you link this library with files | ||
30 | compiled with GCC to produce an executable, this does not cause | ||
31 | the resulting executable to be covered by the GNU General Public License. | ||
32 | This exception does not however invalidate any other reasons why | ||
33 | the executable file might be covered by the GNU General Public License. */ | ||
34 | |||
35 | /* Use this one for any 680x0; assumes no floating point hardware. | ||
36 | The trailing " '" appearing on some lines is for ANSI preprocessors. Yuk. | ||
37 | Some of this code comes from MINIX, via the folks at ericsson. | ||
38 | D. V. Henkel-Wallace (gumby@cygnus.com) Fete Bastille, 1992 | ||
39 | */ | ||
40 | |||
41 | /* These are predefined by new versions of GNU cpp. */ | ||
42 | |||
43 | #ifndef __USER_LABEL_PREFIX__ | ||
44 | #define __USER_LABEL_PREFIX__ _ | ||
45 | #endif | ||
46 | |||
47 | #ifndef __REGISTER_PREFIX__ | ||
48 | #define __REGISTER_PREFIX__ | ||
49 | #endif | ||
50 | |||
51 | #ifndef __IMMEDIATE_PREFIX__ | ||
52 | #define __IMMEDIATE_PREFIX__ # | ||
53 | #endif | ||
54 | |||
55 | /* ANSI concatenation macros. */ | ||
56 | |||
57 | #define CONCAT1(a, b) CONCAT2(a, b) | ||
58 | #define CONCAT2(a, b) a ## b | ||
59 | |||
60 | /* Use the right prefix for global labels. */ | ||
61 | |||
62 | #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__, x) | ||
63 | |||
64 | /* Use the right prefix for registers. */ | ||
65 | |||
66 | #define REG(x) CONCAT1 (__REGISTER_PREFIX__, x) | ||
67 | |||
68 | /* Use the right prefix for immediate values. */ | ||
69 | |||
70 | #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__, x) | ||
71 | |||
72 | #define d0 REG (d0) | ||
73 | #define d1 REG (d1) | ||
74 | #define d2 REG (d2) | ||
75 | #define d3 REG (d3) | ||
76 | #define d4 REG (d4) | ||
77 | #define d5 REG (d5) | ||
78 | #define d6 REG (d6) | ||
79 | #define d7 REG (d7) | ||
80 | #define a0 REG (a0) | ||
81 | #define a1 REG (a1) | ||
82 | #define a2 REG (a2) | ||
83 | #define a3 REG (a3) | ||
84 | #define a4 REG (a4) | ||
85 | #define a5 REG (a5) | ||
86 | #define a6 REG (a6) | ||
87 | #define fp REG (fp) | ||
88 | #define sp REG (sp) | ||
89 | |||
90 | .text | ||
91 | .proc | ||
92 | .globl SYM (__divsi3) | ||
93 | SYM (__divsi3): | ||
94 | movel d2, sp@- | ||
95 | |||
96 | moveq IMM (1), d2 /* sign of result stored in d2 (=1 or =-1) */ | ||
97 | movel sp@(12), d1 /* d1 = divisor */ | ||
98 | jpl L1 | ||
99 | negl d1 | ||
100 | #if !(defined(__mcf5200__) || defined(__mcoldfire__)) | ||
101 | negb d2 /* change sign because divisor <0 */ | ||
102 | #else | ||
103 | negl d2 /* change sign because divisor <0 */ | ||
104 | #endif | ||
105 | L1: movel sp@(8), d0 /* d0 = dividend */ | ||
106 | jpl L2 | ||
107 | negl d0 | ||
108 | #if !(defined(__mcf5200__) || defined(__mcoldfire__)) | ||
109 | negb d2 | ||
110 | #else | ||
111 | negl d2 | ||
112 | #endif | ||
113 | |||
114 | L2: movel d1, sp@- | ||
115 | movel d0, sp@- | ||
116 | jbsr SYM (__udivsi3) /* divide abs(dividend) by abs(divisor) */ | ||
117 | addql IMM (8), sp | ||
118 | |||
119 | tstb d2 | ||
120 | jpl L3 | ||
121 | negl d0 | ||
122 | |||
123 | L3: movel sp@+, d2 | ||
124 | rts | ||
125 | |||