1/* Get NaN payload.
2 Copyright (C) 2016-2021 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
25double
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}
38libm_alias_double (__getpayload, getpayload)
39