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	union ieee754sp y;
27
28	if (ieee754_csr.abs2008) {
29		y = x;
30		SPSIGN(y) = !SPSIGN(x);
31	} else {
32		unsigned int oldrm;
33
34		oldrm = ieee754_csr.rm;
35		ieee754_csr.rm = FPU_CSR_RD;
36		y = ieee754sp_sub(ieee754sp_zero(0), x);
37		ieee754_csr.rm = oldrm;
38	}
39	return y;
40}
41
42union ieee754sp ieee754sp_abs(union ieee754sp x)
43{
44	union ieee754sp y;
45
46	if (ieee754_csr.abs2008) {
47		y = x;
48		SPSIGN(y) = 0;
49	} else {
50		unsigned int oldrm;
51
52		oldrm = ieee754_csr.rm;
53		ieee754_csr.rm = FPU_CSR_RD;
54		if (SPSIGN(x))
55			y = ieee754sp_sub(ieee754sp_zero(0), x);
56		else
57			y = ieee754sp_add(ieee754sp_zero(0), x);
58		ieee754_csr.rm = oldrm;
59	}
60	return y;
61}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/* IEEE754 floating point arithmetic
 3 * single precision
 4 */
 5/*
 6 * MIPS floating point support
 7 * Copyright (C) 1994-2000 Algorithmics Ltd.
 
 
 
 
 
 
 
 
 
 
 
 
 
 8 */
 9
10#include "ieee754sp.h"
11
12union ieee754sp ieee754sp_neg(union ieee754sp x)
13{
14	union ieee754sp y;
15
16	if (ieee754_csr.abs2008) {
17		y = x;
18		SPSIGN(y) = !SPSIGN(x);
19	} else {
20		unsigned int oldrm;
21
22		oldrm = ieee754_csr.rm;
23		ieee754_csr.rm = FPU_CSR_RD;
24		y = ieee754sp_sub(ieee754sp_zero(0), x);
25		ieee754_csr.rm = oldrm;
26	}
27	return y;
28}
29
30union ieee754sp ieee754sp_abs(union ieee754sp x)
31{
32	union ieee754sp y;
33
34	if (ieee754_csr.abs2008) {
35		y = x;
36		SPSIGN(y) = 0;
37	} else {
38		unsigned int oldrm;
39
40		oldrm = ieee754_csr.rm;
41		ieee754_csr.rm = FPU_CSR_RD;
42		if (SPSIGN(x))
43			y = ieee754sp_sub(ieee754sp_zero(0), x);
44		else
45			y = ieee754sp_add(ieee754sp_zero(0), x);
46		ieee754_csr.rm = oldrm;
47	}
48	return y;
49}