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38b2d076 | 1 | /* libgcc routines for R8C/M16C/M32C |
99dee823 | 2 | Copyright (C) 2005-2021 Free Software Foundation, Inc. |
38b2d076 DD |
3 | Contributed by Red Hat. |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it | |
8 | under the terms of the GNU General Public License as published | |
748086b7 | 9 | by the Free Software Foundation; either version 3, or (at your |
38b2d076 DD |
10 | option) any later version. |
11 | ||
38b2d076 DD |
12 | GCC is distributed in the hope that it will be useful, but WITHOUT |
13 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
14 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
15 | License for more details. | |
16 | ||
748086b7 JJ |
17 | Under Section 7 of GPL version 3, you are granted additional |
18 | permissions described in the GCC Runtime Library Exception, version | |
19 | 3.1, as published by the Free Software Foundation. | |
20 | ||
21 | You should have received a copy of the GNU General Public License and | |
22 | a copy of the GCC Runtime Library Exception along with this program; | |
23 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
24 | <http://www.gnu.org/licenses/>. */ | |
38b2d076 | 25 | |
235e1fe8 NC |
26 | typedef int sint32_type __attribute__ ((mode (SI))); |
27 | typedef unsigned int uint32_type __attribute__ ((mode (SI))); | |
28 | typedef int word_type __attribute__ ((mode (__word__))); | |
38b2d076 | 29 | |
235e1fe8 NC |
30 | uint32_type udivmodsi4 (uint32_type, uint32_type, word_type); |
31 | sint32_type __divsi3 (sint32_type, sint32_type); | |
32 | sint32_type __modsi3 (sint32_type, sint32_type); | |
38b2d076 | 33 | |
235e1fe8 NC |
34 | uint32_type |
35 | udivmodsi4 (uint32_type num, uint32_type den, word_type modwanted) | |
38b2d076 | 36 | { |
235e1fe8 NC |
37 | uint32_type bit = 1; |
38 | uint32_type res = 0; | |
38b2d076 DD |
39 | |
40 | while (den < num && bit && !(den & (1L << 31))) | |
41 | { | |
42 | den <<= 1; | |
43 | bit <<= 1; | |
44 | } | |
45 | while (bit) | |
46 | { | |
47 | if (num >= den) | |
48 | { | |
49 | num -= den; | |
50 | res |= bit; | |
51 | } | |
52 | bit >>= 1; | |
53 | den >>= 1; | |
54 | } | |
55 | if (modwanted) | |
56 | return num; | |
57 | return res; | |
58 | } | |
59 | ||
235e1fe8 NC |
60 | sint32_type |
61 | __divsi3 (sint32_type a, sint32_type b) | |
38b2d076 DD |
62 | { |
63 | word_type neg = 0; | |
235e1fe8 | 64 | sint32_type res; |
38b2d076 DD |
65 | |
66 | if (a < 0) | |
67 | { | |
68 | a = -a; | |
69 | neg = !neg; | |
70 | } | |
71 | ||
72 | if (b < 0) | |
73 | { | |
74 | b = -b; | |
75 | neg = !neg; | |
76 | } | |
77 | ||
78 | res = udivmodsi4 (a, b, 0); | |
79 | ||
80 | if (neg) | |
81 | res = -res; | |
82 | ||
83 | return res; | |
84 | } | |
85 | ||
235e1fe8 NC |
86 | sint32_type |
87 | __modsi3 (sint32_type a, sint32_type b) | |
38b2d076 DD |
88 | { |
89 | word_type neg = 0; | |
235e1fe8 | 90 | sint32_type res; |
38b2d076 DD |
91 | |
92 | if (a < 0) | |
93 | { | |
94 | a = -a; | |
95 | neg = 1; | |
96 | } | |
97 | ||
98 | if (b < 0) | |
99 | b = -b; | |
100 | ||
101 | res = udivmodsi4 (a, b, 1); | |
102 | ||
103 | if (neg) | |
104 | res = -res; | |
105 | ||
106 | return res; | |
107 | } | |
108 | ||
235e1fe8 NC |
109 | /* See the comment by the definition of LIBGCC2_UNITS_PER_WORD in |
110 | m32c.h for why we are creating extra versions of some of the | |
111 | functions defined in libgcc2.c. */ | |
112 | ||
113 | #define LIBGCC2_UNITS_PER_WORD 2 | |
38b2d076 | 114 | |
235e1fe8 NC |
115 | #define L_clzsi2 |
116 | #define L_ctzsi2 | |
117 | #define L_ffssi2 | |
118 | #define L_paritysi2 | |
119 | #define L_popcountsi2 | |
38b2d076 | 120 | |
235e1fe8 | 121 | #include "libgcc2.c" |
38b2d076 | 122 | |
235e1fe8 NC |
123 | uint32_type |
124 | __udivsi3 (uint32_type a, uint32_type b) | |
38b2d076 DD |
125 | { |
126 | return udivmodsi4 (a, b, 0); | |
127 | } | |
128 | ||
235e1fe8 NC |
129 | uint32_type |
130 | __umoddi3 (uint32_type a, uint32_type b) | |
38b2d076 DD |
131 | { |
132 | return udivmodsi4 (a, b, 1); | |
133 | } | |
d04aacfc NC |
134 | |
135 | /* Returns the number of leading redundant sign bits in X. | |
136 | I.e. the number of bits following the most significant bit which are | |
137 | identical to it. There are no special cases for 0 or other values. */ | |
138 | ||
139 | int | |
140 | __clrsbhi2 (word_type x) | |
141 | { | |
142 | if (x < 0) | |
143 | x = ~x; | |
144 | if (x == 0) | |
145 | return 15; | |
146 | return __builtin_clz (x) - 1; | |
147 | } |