| /* Truncate argument to nearest integral value not larger than the argument. |
| Copyright (C) 1997, 1999 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, write to the Free |
| Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307 USA. */ |
| |
| #include <math.h> |
| |
| #include "math_private.h" |
| |
| |
| long double |
| __truncl (long double x) |
| { |
| int32_t j0; |
| u_int64_t i0, i1, sx; |
| |
| GET_LDOUBLE_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_LDOUBLE_WORDS64 (x, sx, 0); |
| else |
| SET_LDOUBLE_WORDS64 (x, i0 & ~(0x0000ffffffffffffLL >> j0), 0); |
| } |
| else if (j0 > 111) |
| { |
| if (j0 == 0x4000) |
| /* x is inf or NaN. */ |
| return x + x; |
| } |
| else |
| { |
| SET_LDOUBLE_WORDS64 (x, i0, i1 & ~(0xffffffffffffffffULL >> (j0 - 48))); |
| } |
| |
| return x; |
| } |
| weak_alias (__truncl, truncl) |
