| /* Get NaN payload. ldbl-128 version. |
| Copyright (C) 2016-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <math.h> |
| #include <math_private.h> |
| #include <libm-alias-ldouble.h> |
| #include <stdint.h> |
| |
| _Float128 |
| __getpayloadl (const _Float128 *x) |
| { |
| uint64_t hx, lx; |
| GET_LDOUBLE_WORDS64 (hx, lx, *x); |
| hx &= 0x7fffffffffffULL; |
| /* Construct the representation of the return value directly, since |
| 128-bit integers may not be available. */ |
| int lz; |
| if (hx == 0) |
| { |
| if (lx == 0) |
| return 0.0L; |
| else |
| lz = __builtin_clzll (lx) + 64; |
| } |
| else |
| lz = __builtin_clzll (hx); |
| int shift = lz - 15; |
| if (shift >= 64) |
| { |
| hx = lx << (shift - 64); |
| lx = 0; |
| } |
| else |
| { |
| /* 2 <= SHIFT <= 63. */ |
| hx = (hx << shift) | (lx >> (64 - shift)); |
| lx <<= shift; |
| } |
| hx = (hx & 0xffffffffffffULL) | ((0x3fffULL + 127 - lz) << 48); |
| _Float128 ret; |
| SET_LDOUBLE_WORDS64 (ret, hx, lx); |
| return ret; |
| } |
| libm_alias_ldouble (__getpayload, getpayload) |
