1 /* Floating point environment.  ARC version.
2    Copyright (C) 2020-2021 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library.  If not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 #ifndef _FENV_H
20 # error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
21 #endif
22 
23 enum
24   {
25     FE_INVALID   =
26 # define FE_INVALID	(0x01)
27       FE_INVALID,
28     FE_DIVBYZERO =
29 # define FE_DIVBYZERO	(0x02)
30       FE_DIVBYZERO,
31     FE_OVERFLOW  =
32 # define FE_OVERFLOW	(0x04)
33       FE_OVERFLOW,
34     FE_UNDERFLOW =
35 # define FE_UNDERFLOW	(0x08)
36       FE_UNDERFLOW,
37     FE_INEXACT   =
38 # define FE_INEXACT	(0x10)
39       FE_INEXACT
40   };
41 
42 # define FE_ALL_EXCEPT \
43 	(FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW | FE_INEXACT)
44 
45 enum
46   {
47     FE_TOWARDZERO =
48 # define FE_TOWARDZERO	(0x0)
49       FE_TOWARDZERO,
50     FE_TONEAREST  =
51 # define FE_TONEAREST	(0x1)	/* default */
52       FE_TONEAREST,
53     FE_UPWARD     =
54 # define FE_UPWARD	(0x2)
55       FE_UPWARD,
56     FE_DOWNWARD   =
57 # define FE_DOWNWARD	(0x3)
58       FE_DOWNWARD
59   };
60 
61 typedef unsigned int fexcept_t;
62 
63 typedef struct
64 {
65   unsigned int __fpcr;
66   unsigned int __fpsr;
67 } fenv_t;
68 
69 /* If the default argument is used we use this value.  */
70 #define FE_DFL_ENV	((const fenv_t *) -1)
71 
72 #if __GLIBC_USE (IEC_60559_BFP_EXT)
73 /* Type representing floating-point control modes.  */
74 typedef unsigned int femode_t;
75 
76 /* Default floating-point control modes.  */
77 # define FE_DFL_MODE	((const femode_t *) -1L)
78 #endif
79