148 lines
3.1 KiB
C
148 lines
3.1 KiB
C
/* libgcc routines for R8C/M16C/M32C
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Copyright (C) 2005-2020 Free Software Foundation, Inc.
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Contributed by Red Hat.
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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 sint32_type __attribute__ ((mode (SI)));
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typedef unsigned int uint32_type __attribute__ ((mode (SI)));
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typedef int word_type __attribute__ ((mode (__word__)));
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uint32_type udivmodsi4 (uint32_type, uint32_type, word_type);
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sint32_type __divsi3 (sint32_type, sint32_type);
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sint32_type __modsi3 (sint32_type, sint32_type);
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uint32_type
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udivmodsi4 (uint32_type num, uint32_type den, word_type modwanted)
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{
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uint32_type bit = 1;
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uint32_type res = 0;
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while (den < num && bit && !(den & (1L << 31)))
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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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sint32_type
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__divsi3 (sint32_type a, sint32_type b)
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{
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word_type neg = 0;
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sint32_type res;
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if (a < 0)
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{
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a = -a;
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neg = !neg;
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}
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if (b < 0)
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{
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b = -b;
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neg = !neg;
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}
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res = udivmodsi4 (a, b, 0);
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if (neg)
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res = -res;
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return res;
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}
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sint32_type
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__modsi3 (sint32_type a, sint32_type b)
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{
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word_type neg = 0;
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sint32_type res;
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if (a < 0)
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{
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a = -a;
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neg = 1;
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}
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if (b < 0)
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b = -b;
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res = udivmodsi4 (a, b, 1);
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if (neg)
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res = -res;
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return res;
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}
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/* See the comment by the definition of LIBGCC2_UNITS_PER_WORD in
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m32c.h for why we are creating extra versions of some of the
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functions defined in libgcc2.c. */
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#define LIBGCC2_UNITS_PER_WORD 2
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#define L_clzsi2
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#define L_ctzsi2
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#define L_ffssi2
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#define L_paritysi2
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#define L_popcountsi2
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#include "libgcc2.c"
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uint32_type
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__udivsi3 (uint32_type a, uint32_type b)
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{
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return udivmodsi4 (a, b, 0);
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}
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uint32_type
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__umoddi3 (uint32_type a, uint32_type b)
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{
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return udivmodsi4 (a, b, 1);
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}
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/* Returns the number of leading redundant sign bits in X.
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I.e. the number of bits following the most significant bit which are
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identical to it. There are no special cases for 0 or other values. */
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int
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__clrsbhi2 (word_type x)
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{
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if (x < 0)
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x = ~x;
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if (x == 0)
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return 15;
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return __builtin_clz (x) - 1;
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}
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