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Diffstat (limited to 'arch/mips/math-emu/sp_simple.c')
-rw-r--r-- | arch/mips/math-emu/sp_simple.c | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/mips/math-emu/sp_simple.c b/arch/mips/math-emu/sp_simple.c new file mode 100644 index 000000000000..c809830dffb4 --- /dev/null +++ b/arch/mips/math-emu/sp_simple.c | |||
@@ -0,0 +1,84 @@ | |||
1 | /* IEEE754 floating point arithmetic | ||
2 | * single precision | ||
3 | */ | ||
4 | /* | ||
5 | * MIPS floating point support | ||
6 | * Copyright (C) 1994-2000 Algorithmics Ltd. | ||
7 | * http://www.algor.co.uk | ||
8 | * | ||
9 | * ######################################################################## | ||
10 | * | ||
11 | * This program is free software; you can distribute it and/or modify it | ||
12 | * under the terms of the GNU General Public License (Version 2) as | ||
13 | * published by the Free Software Foundation. | ||
14 | * | ||
15 | * This program is distributed in the hope it will be useful, but WITHOUT | ||
16 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
17 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
18 | * for more details. | ||
19 | * | ||
20 | * You should have received a copy of the GNU General Public License along | ||
21 | * with this program; if not, write to the Free Software Foundation, Inc., | ||
22 | * 59 Temple Place - Suite 330, Boston MA 02111-1307, USA. | ||
23 | * | ||
24 | * ######################################################################## | ||
25 | */ | ||
26 | |||
27 | |||
28 | #include "ieee754sp.h" | ||
29 | |||
30 | int ieee754sp_finite(ieee754sp x) | ||
31 | { | ||
32 | return SPBEXP(x) != SP_EMAX + 1 + SP_EBIAS; | ||
33 | } | ||
34 | |||
35 | ieee754sp ieee754sp_copysign(ieee754sp x, ieee754sp y) | ||
36 | { | ||
37 | CLEARCX; | ||
38 | SPSIGN(x) = SPSIGN(y); | ||
39 | return x; | ||
40 | } | ||
41 | |||
42 | |||
43 | ieee754sp ieee754sp_neg(ieee754sp x) | ||
44 | { | ||
45 | COMPXSP; | ||
46 | |||
47 | EXPLODEXSP; | ||
48 | CLEARCX; | ||
49 | FLUSHXSP; | ||
50 | |||
51 | if (xc == IEEE754_CLASS_SNAN) { | ||
52 | SETCX(IEEE754_INVALID_OPERATION); | ||
53 | return ieee754sp_nanxcpt(ieee754sp_indef(), "neg"); | ||
54 | } | ||
55 | |||
56 | if (ieee754sp_isnan(x)) /* but not infinity */ | ||
57 | return ieee754sp_nanxcpt(x, "neg", x); | ||
58 | |||
59 | /* quick fix up */ | ||
60 | SPSIGN(x) ^= 1; | ||
61 | return x; | ||
62 | } | ||
63 | |||
64 | |||
65 | ieee754sp ieee754sp_abs(ieee754sp x) | ||
66 | { | ||
67 | COMPXSP; | ||
68 | |||
69 | EXPLODEXSP; | ||
70 | CLEARCX; | ||
71 | FLUSHXSP; | ||
72 | |||
73 | if (xc == IEEE754_CLASS_SNAN) { | ||
74 | SETCX(IEEE754_INVALID_OPERATION); | ||
75 | return ieee754sp_nanxcpt(ieee754sp_indef(), "abs"); | ||
76 | } | ||
77 | |||
78 | if (ieee754sp_isnan(x)) /* but not infinity */ | ||
79 | return ieee754sp_nanxcpt(x, "abs", x); | ||
80 | |||
81 | /* quick fix up */ | ||
82 | SPSIGN(x) = 0; | ||
83 | return x; | ||
84 | } | ||