1/* IEEE754 floating point arithmetic
 2 * double precision: common utilities
 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 "ieee754dp.h"
23
24union ieee754dp ieee754dp_neg(union ieee754dp x)
25{
26	union ieee754dp y;
27
28	if (ieee754_csr.abs2008) {
29		y = x;
30		DPSIGN(y) = !DPSIGN(x);
31	} else {
32		unsigned int oldrm;
33
34		oldrm = ieee754_csr.rm;
35		ieee754_csr.rm = FPU_CSR_RD;
36		y = ieee754dp_sub(ieee754dp_zero(0), x);
37		ieee754_csr.rm = oldrm;
38	}
39	return y;
40}
41
42union ieee754dp ieee754dp_abs(union ieee754dp x)
43{
44	union ieee754dp y;
45
46	if (ieee754_csr.abs2008) {
47		y = x;
48		DPSIGN(y) = 0;
49	} else {
50		unsigned int oldrm;
51
52		oldrm = ieee754_csr.rm;
53		ieee754_csr.rm = FPU_CSR_RD;
54		if (DPSIGN(x))
55			y = ieee754dp_sub(ieee754dp_zero(0), x);
56		else
57			y = ieee754dp_add(ieee754dp_zero(0), x);
58		ieee754_csr.rm = oldrm;
59	}
60	return y;
61}

 1/* IEEE754 floating point arithmetic
 2 * double precision: common utilities
 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 "ieee754dp.h"
23
24union ieee754dp ieee754dp_neg(union ieee754dp x)
25{
26	union ieee754dp y;
27
28	if (ieee754_csr.abs2008) {
29		y = x;
30		DPSIGN(y) = !DPSIGN(x);
31	} else {
32		unsigned int oldrm;
33
34		oldrm = ieee754_csr.rm;
35		ieee754_csr.rm = FPU_CSR_RD;
36		y = ieee754dp_sub(ieee754dp_zero(0), x);
37		ieee754_csr.rm = oldrm;
38	}
39	return y;
40}
41
42union ieee754dp ieee754dp_abs(union ieee754dp x)
43{
44	union ieee754dp y;
45
46	if (ieee754_csr.abs2008) {
47		y = x;
48		DPSIGN(y) = 0;
49	} else {
50		unsigned int oldrm;
51
52		oldrm = ieee754_csr.rm;
53		ieee754_csr.rm = FPU_CSR_RD;
54		if (DPSIGN(x))
55			y = ieee754dp_sub(ieee754dp_zero(0), x);
56		else
57			y = ieee754dp_add(ieee754dp_zero(0), x);
58		ieee754_csr.rm = oldrm;
59	}
60	return y;
61}