1 /*-
2  * Copyright (c) 2004-2005 David Schultz <das@FreeBSD.ORG>
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: src/lib/msun/arm/fenv.h,v 1.5 2005/03/16 19:03:45 das Exp $
27  */
28 
29 /*
30    Rewritten for Android.
31 */
32 
33 /* MIPS FPU floating point control register bits.
34  *
35  * 31-25  -> floating point conditions code bits set by FP compare
36  *           instructions
37  * 24     -> flush denormalized results to zero instead of
38  *           causing unimplemented operation exception.
39  * 23     -> Condition bit
40  * 22     -> In conjunction with FS detects denormalized
41  *           operands and replaces them internally with 0.
42  * 21     -> In conjunction with FS forces denormalized operands
43  *           to the closest normalized value.
44  * 20-18  -> reserved (read as 0, write with 0)
45  * 17     -> cause bit for unimplemented operation
46  * 16     -> cause bit for invalid exception
47  * 15     -> cause bit for division by zero exception
48  * 14     -> cause bit for overflow exception
49  * 13     -> cause bit for underflow exception
50  * 12     -> cause bit for inexact exception
51  * 11     -> enable exception for invalid exception
52  * 10     -> enable exception for division by zero exception
53  *  9     -> enable exception for overflow exception
54  *  8     -> enable exception for underflow exception
55  *  7     -> enable exception for inexact exception
56  *  6     -> flag invalid exception
57  *  5     -> flag division by zero exception
58  *  4     -> flag overflow exception
59  *  3     -> flag underflow exception
60  *  2     -> flag inexact exception
61  *  1-0   -> rounding control
62  *
63  *
64  * Rounding Control:
65  * 00 - rounding to nearest (RN)
66  * 01 - rounding toward zero (RZ)
67  * 10 - rounding (up) toward plus infinity (RP)
68  * 11 - rounding (down)toward minus infinity (RM)
69  */
70 
71 #ifndef _MIPS_FENV_H_
72 #define _MIPS_FENV_H_
73 
74 #include <sys/types.h>
75 
76 __BEGIN_DECLS
77 
78 typedef __uint32_t fenv_t;
79 typedef __uint32_t fexcept_t;
80 
81 /* Exception flags */
82 #define FE_INVALID    0x40
83 #define FE_DIVBYZERO  0x20
84 #define FE_OVERFLOW   0x10
85 #define FE_UNDERFLOW  0x08
86 #define FE_INEXACT    0x04
87 #define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
88                        FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
89 
90 /* Rounding modes */
91 #define FE_TONEAREST  0x0000
92 #define FE_TOWARDZERO 0x0001
93 #define FE_UPWARD     0x0002
94 #define FE_DOWNWARD   0x0003
95 
96 __END_DECLS
97 
98 #endif /* !_MIPS_FENV_H_ */
99