| /* Round a double value to a long long in the current rounding mode. |
| Copyright (C) 1997-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| 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/>. */ |
| |
| #include <limits.h> |
| #include <math.h> |
| #include <math_ldbl_opt.h> |
| #include <math_private.h> |
| #include <stdint.h> |
| #include <libm-alias-double.h> |
| |
| long long int |
| __llrint (double x) |
| { |
| double rx = __rint (x); |
| if (HAVE_PPC_FCTIDZ || rx != x) |
| return (long long int) rx; |
| else |
| { |
| /* Avoid incorrect exceptions from libgcc conversions (as of GCC |
| 5): <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59412>. */ |
| if (fabs (rx) < 0x1p31) |
| return (long long int) (long int) rx; |
| uint64_t i0; |
| EXTRACT_WORDS64 (i0, rx); |
| int exponent = ((i0 >> 52) & 0x7ff) - 0x3ff; |
| if (exponent < 63) |
| { |
| unsigned long long int mant |
| = (i0 & ((1ULL << 52) - 1)) | (1ULL << 52); |
| if (exponent < 52) |
| mant >>= 52 - exponent; |
| else |
| mant <<= exponent - 52; |
| return (long long int) ((i0 & (1ULL << 63)) != 0 ? -mant : mant); |
| } |
| else if (rx == (double) LLONG_MIN) |
| return LLONG_MIN; |
| else |
| return (long long int) (long int) rx << 32; |
| } |
| } |
| libm_alias_double (__llrint, llrint) |
