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d876f532 UD |
1 | /* Software floating-point emulation. |
2 | Return (double)a | |
b168057a | 3 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
d876f532 UD |
4 | This file is part of the GNU C Library. |
5 | Contributed by Richard Henderson (rth@cygnus.com) and | |
6 | Jakub Jelinek (jj@ultra.linux.cz). | |
7 | ||
8 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
9 | modify it under the terms of the GNU Lesser General Public |
10 | License as published by the Free Software Foundation; either | |
11 | version 2.1 of the License, or (at your option) any later version. | |
d876f532 UD |
12 | |
13 | The GNU C Library is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 16 | Lesser General Public License for more details. |
d876f532 | 17 | |
41bdb6e2 | 18 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
19 | License along with the GNU C Library; if not, see |
20 | <http://www.gnu.org/licenses/>. */ | |
d876f532 UD |
21 | |
22 | #include "soft-fp.h" | |
23 | #include "double.h" | |
24 | #include "quad.h" | |
25 | ||
26 | double _Q_qtod(const long double a) | |
27 | { | |
28 | FP_DECL_EX; | |
29 | FP_DECL_Q(A); | |
30 | FP_DECL_D(R); | |
31 | double r; | |
32 | ||
33 | FP_INIT_ROUNDMODE; | |
fe0b1e85 | 34 | FP_UNPACK_SEMIRAW_Q(A, a); |
d876f532 | 35 | #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q |
fe0b1e85 | 36 | FP_TRUNC(D,Q,2,4,R,A); |
d876f532 | 37 | #else |
fe0b1e85 | 38 | FP_TRUNC(D,Q,1,2,R,A); |
d876f532 | 39 | #endif |
fe0b1e85 | 40 | FP_PACK_SEMIRAW_D(r, R); |
d876f532 UD |
41 | FP_HANDLE_EXCEPTIONS; |
42 | ||
43 | return r; | |
44 | } |