projects / thirdparty / gcc.git / blame
| Commit | Line | Data |
|---|---|---|
| 7acf4da6 DD |
1 | /* libgcc routines for MeP. |
| 2 | Copyright 2001, 2002, 2009 Free Software Foundation, Inc | |
| 3 | ||
| 4 | This file is free software; you can redistribute it and/or modify it | |
| 5 | under the terms of the GNU General Public License as published by the | |
| 6 | Free Software Foundation; either version 3 of the License, or (at your | |
| 7 | option) any later version. | |
| 8 | ||
| 9 | This file is distributed in the hope that it will be useful, but | |
| 10 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | General Public License for more details. | |
| 13 | ||
| 14 | Under Section 7 of GPL version 3, you are granted additional | |
| 15 | permissions described in the GCC Runtime Library Exception, version | |
| 16 | 3.1, as published by the Free Software Foundation. | |
| 17 | ||
| 18 | You should have received a copy of the GNU General Public License and | |
| 19 | a copy of the GCC Runtime Library Exception along with this program; | |
| 20 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 21 | <http://www.gnu.org/licenses/>. */ | |
| 22 | ||
| 23 | typedef int SItype __attribute__ ((mode (SI))); | |
| 24 | typedef unsigned int USItype __attribute__ ((mode (SI))); | |
| 25 | ||
| 26 | typedef int word_type __attribute__ ((mode (__word__))); | |
| 27 | ||
| 28 | USItype | |
| 29 | __mulsi3 (USItype a, USItype b) | |
| 30 | { | |
| 31 | USItype c = 0; | |
| 32 | ||
| 33 | while (a != 0) | |
| 34 | { | |
| 35 | if (a & 1) | |
| 36 | c += b; | |
| 37 | a >>= 1; | |
| 38 | b <<= 1; | |
| 39 | } | |
| 40 | ||
| 41 | return c; | |
| 42 | } | |
| 43 | ||
| 44 | ||
| 45 | ||
| 46 | USItype | |
| 47 | udivmodsi4(USItype num, USItype den, word_type modwanted) | |
| 48 | { | |
| 49 | USItype bit = 1; | |
| 50 | USItype res = 0; | |
| 51 | ||
| 52 | while (den < num && bit && !(den & (1L<<31))) | |
| 53 | { | |
| 54 | den <<=1; | |
| 55 | bit <<=1; | |
| 56 | } | |
| 57 | while (bit) | |
| 58 | { | |
| 59 | if (num >= den) | |
| 60 | { | |
| 61 | num -= den; | |
| 62 | res |= bit; | |
| 63 | } | |
| 64 | bit >>=1; | |
| 65 | den >>=1; | |
| 66 | } | |
| 67 | if (modwanted) return num; | |
| 68 | return res; | |
| 69 | } | |
| 70 | ||
| 71 | ||
| 72 | ||
| 73 | SItype | |
| 74 | __divsi3 (SItype a, SItype b) | |
| 75 | { | |
| 76 | word_type neg = 0; | |
| 77 | SItype res; | |
| 78 | ||
| 79 | if (a < 0) | |
| 80 | { | |
| 81 | a = -a; | |
| 82 | neg = !neg; | |
| 83 | } | |
| 84 | ||
| 85 | if (b < 0) | |
| 86 | { | |
| 87 | b = -b; | |
| 88 | neg = !neg; | |
| 89 | } | |
| 90 | ||
| 91 | res = udivmodsi4 (a, b, 0); | |
| 92 | ||
| 93 | if (neg) | |
| 94 | res = -res; | |
| 95 | ||
| 96 | return res; | |
| 97 | } | |
| 98 | ||
| 99 | ||
| 100 | ||
| 101 | SItype | |
| 102 | __modsi3 (SItype a, SItype b) | |
| 103 | { | |
| 104 | word_type neg = 0; | |
| 105 | SItype res; | |
| 106 | ||
| 107 | if (a < 0) | |
| 108 | { | |
| 109 | a = -a; | |
| 110 | neg = 1; | |
| 111 | } | |
| 112 | ||
| 113 | if (b < 0) | |
| 114 | b = -b; | |
| 115 | ||
| 116 | res = udivmodsi4 (a, b, 1); | |
| 117 | ||
| 118 | if (neg) | |
| 119 | res = -res; | |
| 120 | ||
| 121 | return res; | |
| 122 | } | |
| 123 | ||
| 124 | ||
| 125 | ||
| 126 | ||
| 127 | SItype | |
| 128 | __udivsi3 (SItype a, SItype b) | |
| 129 | { | |
| 130 | return udivmodsi4 (a, b, 0); | |
| 131 | } | |
| 132 | ||
| 133 | ||
| 134 | ||
| 135 | SItype | |
| 136 | __umodsi3 (SItype a, SItype b) | |
| 137 | { | |
| 138 | return udivmodsi4 (a, b, 1); | |
| 139 | } |