1 /* Get NaN payload. 2 Copyright (C) 2016-2022 Free Software Foundation, Inc. 3 This file is part of the GNU C Library. 4 5 The GNU C Library is free software; you can redistribute it and/or 6 modify it under the terms of the GNU Lesser General Public 7 License as published by the Free Software Foundation; either 8 version 2.1 of the License, or (at your option) any later version. 9 10 The GNU C Library is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13 Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public 16 License along with the GNU C Library; if not, see 17 <https://www.gnu.org/licenses/>. */ 18 19 #include <math.h> 20 #include <math_private.h> 21 #include <libm-alias-double.h> 22 #include <stdint.h> 23 #include <fix-int-fp-convert-zero.h> 24 25 double __getpayload(const double * x)26__getpayload (const double *x) 27 { 28 uint64_t ix; 29 EXTRACT_WORDS64 (ix, *x); 30 if ((ix & 0x7ff0000000000000ULL) != 0x7ff0000000000000ULL 31 || (ix & 0xfffffffffffffULL) == 0) 32 return -1; 33 ix &= 0x7ffffffffffffULL; 34 if (FIX_INT_FP_CONVERT_ZERO && ix == 0) 35 return 0.0f; 36 return (double) ix; 37 } 38 libm_alias_double (__getpayload, getpayload) 39