1 /* Round argument to nearest integral value according to current rounding 2 direction. 3 Copyright (C) 1997-2022 Free Software Foundation, Inc. 4 This file is part of the GNU C Library. 5 6 The GNU C Library is free software; you can redistribute it and/or 7 modify it under the terms of the GNU Lesser General Public 8 License as published by the Free Software Foundation; either 9 version 2.1 of the License, or (at your option) any later version. 10 11 The GNU C Library is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 Lesser General Public License for more details. 15 16 You should have received a copy of the GNU Lesser General Public 17 License along with the GNU C Library. If not, see 18 <https://www.gnu.org/licenses/>. */ 19 20 #include <math.h> 21 #include <math_private.h> 22 #include <libm-alias-float.h> 23 #include "mathimpl.h" 24 25 long long int __llrintf(float x)26__llrintf (float x) 27 { 28 int32_t e; 29 uint32_t i, s; 30 long long int result; 31 32 x = __m81_u(__rintf) (x); 33 34 GET_FLOAT_WORD (i, x); 35 36 e = ((i >> 23) & 0xff) - 0x7f; 37 if (e < 0) 38 return 0; 39 s = i; 40 i &= 0x7fffff; 41 i |= 0x800000; 42 43 if (e < 63) 44 { 45 if (e > 55) 46 result = (long long int) (i << (e - 55)) << 32; 47 else if (e > 31) 48 result = (((long long int) (i >> (55 - e)) << 32) | (i << (e - 23))); 49 else if (e > 23) 50 result = i << (e - 23); 51 else 52 result = i >> (23 - e); 53 if (s & 0x80000000) 54 result = -result; 55 } 56 else 57 /* The number is too large or not finite. The standard leaves it 58 undefined what to return when the number is too large to fit in a 59 `long long int'. */ 60 result = -1LL; 61 62 return result; 63 } 64 65 libm_alias_float (__llrint, llrint) 66