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d876f532 UD |
1 | /* Software floating-point emulation. |
2 | Truncate IEEE quad into IEEE double | |
3 | Copyright (C) 1997,1999 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 Library General Public License as | |
10 | published by the Free Software Foundation; either version 2 of the | |
11 | 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 | Library General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Library General Public | |
19 | License along with the GNU C Library; see the file COPYING.LIB. If | |
20 | not, write to the Free Software Foundation, Inc., | |
21 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
22 | ||
23 | #include "soft-fp.h" | |
24 | #include "double.h" | |
25 | #include "quad.h" | |
26 | ||
27 | double __trunctfdf2(long double a) | |
28 | { | |
29 | FP_DECL_EX; | |
30 | FP_DECL_Q(A); | |
31 | FP_DECL_D(R); | |
32 | double r; | |
33 | ||
34 | FP_INIT_ROUNDMODE; | |
35 | FP_UNPACK_Q(A, a); | |
36 | #if (2 * _FP_W_TYPE_SIZE) < _FP_FRACBITS_Q | |
37 | FP_CONV(D,Q,2,4,R,A); | |
38 | #else | |
39 | FP_CONV(D,Q,1,2,R,A); | |
40 | #endif | |
41 | FP_PACK_D(r, R); | |
42 | FP_HANDLE_EXCEPTIONS; | |
43 | ||
44 | return r; | |
45 | } |