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[glibc.git] / soft-fp / trunctfdf2.c
blob85fd241e6b655807faad4bd783f66fd3f4662527
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).
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.
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.
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. */
23 #include "soft-fp.h"
24 #include "double.h"
25 #include "quad.h"
27 double __trunctfdf2(long double a)
29 FP_DECL_EX;
30 FP_DECL_Q(A);
31 FP_DECL_D(R);
32 double r;
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;
44 return r;