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f8e8b8ed | 1 | /* Get NaN payload. dbl-64 version. |
2b778ceb | 2 | Copyright (C) 2016-2021 Free Software Foundation, Inc. |
f8e8b8ed JM |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
f8e8b8ed JM |
18 | |
19 | #include <fix-int-fp-convert-zero.h> | |
20 | #include <math.h> | |
21 | #include <math_private.h> | |
1e2bffd0 | 22 | #include <libm-alias-double.h> |
f8e8b8ed JM |
23 | #include <stdint.h> |
24 | ||
25 | double | |
01f28812 | 26 | __getpayload (const double *x) |
f8e8b8ed JM |
27 | { |
28 | uint32_t hx, lx; | |
29 | EXTRACT_WORDS (hx, lx, *x); | |
6c010c5d JM |
30 | if ((hx & 0x7ff00000) != 0x7ff00000 |
31 | || ((hx & 0xfffff) | lx) == 0) | |
32 | return -1; | |
f8e8b8ed JM |
33 | hx &= 0x7ffff; |
34 | uint64_t ix = ((uint64_t) hx << 32) | lx; | |
35 | if (FIX_INT_FP_CONVERT_ZERO && ix == 0) | |
36 | return 0.0f; | |
37 | return (double) ix; | |
38 | } | |
1e2bffd0 | 39 | libm_alias_double (__getpayload, getpayload) |