89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
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/* libgcc routines for ARC
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Copyright (C) 2019-2022 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
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by the Free Software Foundation; either version 3, or (at your
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option) any later version.
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GCC is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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<http://www.gnu.org/licenses/>. */
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typedef int sint64_t __attribute__ ((mode (DI)));
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typedef unsigned int uint64_t __attribute__ ((mode (DI)));
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typedef unsigned int nint32_t __attribute__ ((mode (SI)));
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typedef int word_t __attribute__ ((mode (__word__)));
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sint64_t __muldi3 (sint64_t, sint64_t);
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nint32_t __umodsi3 (nint32_t, nint32_t);
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#ifdef __ARC_RF16__
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/* Generic multiplication procedure. No mpy operation involved. */
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sint64_t
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__muldi3 (sint64_t a, sint64_t b)
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{
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sint64_t res = 0;
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uint64_t cnt = a;
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while (cnt)
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{
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if (cnt & 1)
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res += b;
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b <<= 1;
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cnt >>= 1;
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}
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return res;
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}
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/* Unsigned 32bit integer division/modulus. */
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static inline __attribute__ ((__always_inline__))
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nint32_t
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udivmodsi4 (nint32_t num, nint32_t den, word_t modwanted)
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{
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nint32_t bit = 1;
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nint32_t res = 0;
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while (den < num && bit && !(den & (1LL << 63)))
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{
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den <<= 1;
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bit <<= 1;
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}
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while (bit)
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{
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if (num >= den)
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{
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num -= den;
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res |= bit;
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}
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bit >>= 1;
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den >>= 1;
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}
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if (modwanted)
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return num;
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return res;
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}
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nint32_t
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__umodsi3 (nint32_t a, nint32_t b)
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{
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return udivmodsi4 (a, b, 1);
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}
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#endif
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