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