1 /* Software floating-point emulation.
2 Return a converted to IEEE double
3 Copyright (C) 1997-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 In addition to the permissions in the GNU Lesser General Public
12 License, the Free Software Foundation gives you unlimited
13 permission to link the compiled version of this file into
14 combinations with other programs, and to distribute those
15 combinations without any restriction coming from the use of this
16 file. (The Lesser General Public License restrictions do apply in
17 other respects; for example, they cover modification of the file,
18 and distribution when not linked into a combine executable.)
19
20 The GNU C Library is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
23 Lesser General Public License for more details.
24
25 You should have received a copy of the GNU Lesser General Public
26 License along with the GNU C Library; if not, see
27 <https://www.gnu.org/licenses/>. */
28
29 #define FP_NO_EXACT_UNDERFLOW
30 #include "soft-fp.h"
31 #include "single.h"
32 #include "double.h"
33
34 DFtype
__extendsfdf2(SFtype a)35 __extendsfdf2 (SFtype a)
36 {
37 FP_DECL_EX;
38 FP_DECL_S (A);
39 FP_DECL_D (R);
40 DFtype r;
41
42 FP_INIT_EXCEPTIONS;
43 FP_UNPACK_RAW_S (A, a);
44 #if _FP_W_TYPE_SIZE < _FP_FRACBITS_D
45 FP_EXTEND (D, S, 2, 1, R, A);
46 #else
47 FP_EXTEND (D, S, 1, 1, R, A);
48 #endif
49 FP_PACK_RAW_D (r, R);
50 FP_HANDLE_EXCEPTIONS;
51
52 return r;
53 }
54