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6c6352e6 JM |
1 | /* Software floating-point emulation. |
2 | Truncate IEEE quad into IEEE extended | |
3 | Copyright (C) 2007 Free Software Foundation, Inc. | |
4 | This file is part of the GNU C Library. | |
5 | Contributed by Uros Bizjak (ubizjak@gmail.com). | |
6 | ||
7 | The GNU C Library is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU Lesser General Public | |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
11 | ||
12 | In addition to the permissions in the GNU Lesser General Public | |
13 | License, the Free Software Foundation gives you unlimited | |
14 | permission to link the compiled version of this file into | |
15 | combinations with other programs, and to distribute those | |
16 | combinations without any restriction coming from the use of this | |
17 | file. (The Lesser General Public License restrictions do apply in | |
18 | other respects; for example, they cover modification of the file, | |
19 | and distribution when not linked into a combine executable.) | |
20 | ||
21 | The GNU C Library is distributed in the hope that it will be useful, | |
22 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
23 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
24 | Lesser General Public License for more details. | |
25 | ||
26 | You should have received a copy of the GNU Lesser General Public | |
27 | License along with the GNU C Library; if not, write to the Free | |
28 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, | |
29 | MA 02110-1301, USA. */ | |
30 | ||
31 | #include "soft-fp.h" | |
32 | #include "extended.h" | |
33 | #include "quad.h" | |
34 | ||
35 | XFtype __trunctfxf2(TFtype a) | |
36 | { | |
37 | FP_DECL_EX; | |
38 | FP_DECL_Q(A); | |
39 | FP_DECL_E(R); | |
40 | XFtype r; | |
41 | ||
42 | FP_INIT_ROUNDMODE; | |
43 | FP_UNPACK_SEMIRAW_Q(A, a); | |
44 | #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q | |
45 | FP_TRUNC(E,Q,4,4,R,A); | |
46 | #else | |
47 | FP_TRUNC(E,Q,2,2,R,A); | |
48 | #endif | |
49 | FP_PACK_SEMIRAW_E(r, R); | |
50 | FP_HANDLE_EXCEPTIONS; | |
51 | ||
52 | return r; | |
53 | } |