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Linux kernel mirror (for testing)
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1/* IEEE754 floating point arithmetic
2 * single precision
3 */
4/*
5 * MIPS floating point support
6 * Copyright (C) 1994-2000 Algorithmics Ltd.
7 *
8 * This program is free software; you can distribute it and/or modify it
9 * under the terms of the GNU General Public License (Version 2) as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 */
21
22#include "ieee754sp.h"
23
24union ieee754sp ieee754sp_neg(union ieee754sp x)
25{
26 unsigned int oldrm;
27 union ieee754sp y;
28
29 oldrm = ieee754_csr.rm;
30 ieee754_csr.rm = FPU_CSR_RD;
31 y = ieee754sp_sub(ieee754sp_zero(0), x);
32 ieee754_csr.rm = oldrm;
33 return y;
34}
35
36union ieee754sp ieee754sp_abs(union ieee754sp x)
37{
38 unsigned int oldrm;
39 union ieee754sp y;
40
41 oldrm = ieee754_csr.rm;
42 ieee754_csr.rm = FPU_CSR_RD;
43 if (SPSIGN(x))
44 y = ieee754sp_sub(ieee754sp_zero(0), x);
45 else
46 y = ieee754sp_add(ieee754sp_zero(0), x);
47 ieee754_csr.rm = oldrm;
48 return y;
49}