## Mercurial > hg > CbC > CbC_gcc

### view libquadmath/math/truncq.c @ 158:494b0b89df80 default tip

Find changesets by keywords (author, files, the commit message), revision
number or hash, or revset expression.

...

author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
---|---|

date | Mon, 25 May 2020 18:13:55 +0900 |

parents | 1830386684a0 |

children |

line wrap: on

line source

/* Truncate argument to nearest integral value not larger than the argument. Copyright (C) 1997-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and Jakub Jelinek <jj@ultra.linux.cz>, 1999. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #define NO_MATH_REDIRECT #include "quadmath-imp.h" __float128 truncq (__float128 x) { int32_t j0; uint64_t i0, i1, sx; GET_FLT128_WORDS64 (i0, i1, x); sx = i0 & 0x8000000000000000ULL; j0 = ((i0 >> 48) & 0x7fff) - 0x3fff; if (j0 < 48) { if (j0 < 0) /* The magnitude of the number is < 1 so the result is +-0. */ SET_FLT128_WORDS64 (x, sx, 0); else SET_FLT128_WORDS64 (x, i0 & ~(0x0000ffffffffffffLL >> j0), 0); } else if (j0 > 111) { if (j0 == 0x4000) /* x is inf or NaN. */ return x + x; } else { SET_FLT128_WORDS64 (x, i0, i1 & ~(0xffffffffffffffffULL >> (j0 - 48))); } return x; }