| /* Round argument to nearest integral value according to current rounding |
| direction. |
| Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> |
| |
| 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 <math.h> |
| #include <math_private.h> |
| #include "mathimpl.h" |
| |
| long long int |
| __llrintf (float x) |
| { |
| int32_t e; |
| u_int32_t i, s; |
| long long int result; |
| |
| x = __m81_u(__rintf) (x); |
| |
| GET_FLOAT_WORD (i, x); |
| |
| e = ((i >> 23) & 0xff) - 0x7f; |
| if (e < 0) |
| return 0; |
| s = i; |
| i &= 0x7fffff; |
| i |= 0x800000; |
| |
| if (e < 63) |
| { |
| if (e > 55) |
| result = (long long int) (i << (e - 55)) << 32; |
| else if (e > 31) |
| result = (((long long int) (i >> (55 - e)) << 32) | (i << (e - 23))); |
| else if (e > 23) |
| result = i << (e - 23); |
| else |
| result = i >> (23 - e); |
| if (s & 0x80000000) |
| result = -result; |
| } |
| else |
| /* The number is too large or not finite. The standard leaves it |
| undefined what to return when the number is too large to fit in a |
| `long long int'. */ |
| result = -1LL; |
| |
| return result; |
| } |
| |
| weak_alias (__llrintf, llrintf) |
