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| Commit | Line | Data |
|---|---|---|
| 2744b8b2 | 1 | /* libgcc routines for ARC |
| a945c346 | 2 | Copyright (C) 2019-2024 Free Software Foundation, Inc. |
| 2744b8b2 CZ |
3 | |
| 4 | This file is part of GCC. | |
| 5 | ||
| 6 | GCC is free software; you can redistribute it and/or modify it | |
| 7 | under the terms of the GNU General Public License as published | |
| 8 | by the Free Software Foundation; either version 3, or (at your | |
| 9 | option) any later version. | |
| 10 | ||
| 11 | GCC is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
| 13 | or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public | |
| 14 | License for more details. | |
| 15 | ||
| 16 | Under Section 7 of GPL version 3, you are granted additional | |
| 17 | permissions described in the GCC Runtime Library Exception, version | |
| 18 | 3.1, as published by the Free Software Foundation. | |
| 19 | ||
| 20 | You should have received a copy of the GNU General Public License and | |
| 21 | a copy of the GCC Runtime Library Exception along with this program; | |
| 22 | see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 23 | <http://www.gnu.org/licenses/>. */ | |
| 24 | ||
| 25 | ||
| 26 | typedef int sint64_t __attribute__ ((mode (DI))); | |
| 27 | typedef unsigned int uint64_t __attribute__ ((mode (DI))); | |
| 28 | typedef unsigned int nint32_t __attribute__ ((mode (SI))); | |
| 29 | typedef int word_t __attribute__ ((mode (__word__))); | |
| 30 | ||
| 31 | sint64_t __muldi3 (sint64_t, sint64_t); | |
| 32 | nint32_t __umodsi3 (nint32_t, nint32_t); | |
| 33 | ||
| 34 | #ifdef __ARC_RF16__ | |
| 35 | ||
| 36 | /* Generic multiplication procedure. No mpy operation involved. */ | |
| 37 | sint64_t | |
| 38 | __muldi3 (sint64_t a, sint64_t b) | |
| 39 | { | |
| 40 | sint64_t res = 0; | |
| 41 | uint64_t cnt = a; | |
| 42 | ||
| 43 | while (cnt) | |
| 44 | { | |
| 45 | if (cnt & 1) | |
| 46 | res += b; | |
| 47 | b <<= 1; | |
| 48 | cnt >>= 1; | |
| 49 | } | |
| 50 | return res; | |
| 51 | } | |
| 52 | ||
| 53 | /* Unsigned 32bit integer division/modulus. */ | |
| 54 | ||
| 55 | static inline __attribute__ ((__always_inline__)) | |
| 56 | nint32_t | |
| 57 | udivmodsi4 (nint32_t num, nint32_t den, word_t modwanted) | |
| 58 | { | |
| 59 | nint32_t bit = 1; | |
| 60 | nint32_t res = 0; | |
| 61 | ||
| c8697735 | 62 | while (den < num && bit && !(den & (1L << 31))) |
| 2744b8b2 CZ |
63 | { |
| 64 | den <<= 1; | |
| 65 | bit <<= 1; | |
| 66 | } | |
| 67 | while (bit) | |
| 68 | { | |
| 69 | if (num >= den) | |
| 70 | { | |
| 71 | num -= den; | |
| 72 | res |= bit; | |
| 73 | } | |
| 74 | bit >>= 1; | |
| 75 | den >>= 1; | |
| 76 | } | |
| 77 | if (modwanted) | |
| 78 | return num; | |
| 79 | return res; | |
| 80 | } | |
| 81 | ||
| 82 | nint32_t | |
| 83 | __umodsi3 (nint32_t a, nint32_t b) | |
| 84 | { | |
| 85 | return udivmodsi4 (a, b, 1); | |
| 86 | } | |
| 87 | ||
| 88 | #endif |