]>
Commit | Line | Data |
---|---|---|
49721058 JM |
1 | /* Software floating-point emulation. |
2 | Truncate IEEE quad into IEEE double | |
3 | Copyright (C) 1997,1999,2006 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 | In addition to the permissions in the GNU Lesser General Public | |
14 | License, the Free Software Foundation gives you unlimited | |
15 | permission to link the compiled version of this file into | |
16 | combinations with other programs, and to distribute those | |
17 | combinations without any restriction coming from the use of this | |
18 | file. (The Lesser General Public License restrictions do apply in | |
19 | other respects; for example, they cover modification of the file, | |
20 | and distribution when not linked into a combine executable.) | |
21 | ||
22 | The GNU C Library is distributed in the hope that it will be useful, | |
23 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
24 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
25 | Lesser General Public License for more details. | |
26 | ||
27 | You should have received a copy of the GNU Lesser General Public | |
28 | License along with the GNU C Library; if not, write to the Free | |
29 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, | |
30 | MA 02110-1301, USA. */ | |
31 | ||
32 | #include "soft-fp.h" | |
33 | #include "double.h" | |
34 | #include "quad.h" | |
35 | ||
36 | DFtype __trunctfdf2(TFtype a) | |
37 | { | |
38 | FP_DECL_EX; | |
39 | FP_DECL_Q(A); | |
40 | FP_DECL_D(R); | |
41 | DFtype r; | |
42 | ||
43 | FP_INIT_ROUNDMODE; | |
44 | FP_UNPACK_SEMIRAW_Q(A, a); | |
45 | #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q | |
46 | FP_TRUNC(D,Q,2,4,R,A); | |
47 | #else | |
48 | FP_TRUNC(D,Q,1,2,R,A); | |
49 | #endif | |
50 | FP_PACK_SEMIRAW_D(r, R); | |
51 | FP_HANDLE_EXCEPTIONS; | |
52 | ||
53 | return r; | |
54 | } |