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1 | /* Software floating-point emulation. | |
2 | Return (double)(*a) | |
3 | Copyright (C) 1997-2018 Free Software Foundation, Inc. | |
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 | |
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. | |
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 | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public | |
19 | License along with the GNU C Library; if not, see | |
20 | <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "soft-fp.h" | |
23 | #include "double.h" | |
24 | #include "quad.h" | |
25 | ||
26 | double _Qp_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; | |
34 | FP_UNPACK_SEMIRAW_QP(A, a); | |
35 | #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q | |
36 | FP_TRUNC(D,Q,2,4,R,A); | |
37 | #else | |
38 | FP_TRUNC(D,Q,1,2,R,A); | |
39 | #endif | |
40 | FP_PACK_SEMIRAW_D(r, R); | |
41 | QP_HANDLE_EXCEPTIONS(__asm ( | |
42 | " ldd [%1], %%f52\n" | |
43 | " ldd [%1+8], %%f54\n" | |
44 | " fqtod %%f52, %0\n" | |
45 | " " : "=&e" (r) : "r" (a) : QP_CLOBBER)); | |
46 | ||
47 | return r; | |
48 | } |