trunctfsf2.c revision 296373 
1238582Smm/* Software floating-point emulation.
2238582Smm   Truncate IEEE quad into IEEE single
3238582Smm   Copyright (C) 1997,1999,2006 Free Software Foundation, Inc.
4238582Smm   This file is part of the GNU C Library.
5238582Smm   Contributed by Richard Henderson (rth@cygnus.com) and
6238582Smm		  Jakub Jelinek (jj@ultra.linux.cz).
7238582Smm
8238582Smm   The GNU C Library is free software; you can redistribute it and/or
9238582Smm   modify it under the terms of the GNU Lesser General Public
10238582Smm   License as published by the Free Software Foundation; either
11238582Smm   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 "single.h"
34#include "quad.h"
35
36SFtype __trunctfsf2(TFtype a)
37{
38  FP_DECL_EX;
39  FP_DECL_Q(A);
40  FP_DECL_S(R);
41  SFtype 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(S,Q,1,4,R,A);
47#else
48  FP_TRUNC(S,Q,1,2,R,A);
49#endif
50  FP_PACK_SEMIRAW_S(r, R);
51  FP_HANDLE_EXCEPTIONS;
52
53  return r;
54}
55