License cleanup: add SPDX GPL-2.0 license identifier to files with no license
[linux-block.git] / arch / x86 / math-emu / control_w.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*---------------------------------------------------------------------------+
3  |  control_w.h                                                              |
4  |                                                                           |
5  | Copyright (C) 1992,1993                                                   |
6  |                       W. Metzenthen, 22 Parker St, Ormond, Vic 3163,      |
7  |                       Australia.  E-mail   billm@vaxc.cc.monash.edu.au    |
8  |                                                                           |
9  +---------------------------------------------------------------------------*/
10
11 #ifndef _CONTROLW_H_
12 #define _CONTROLW_H_
13
14 #ifdef __ASSEMBLY__
15 #define _Const_(x)      $##x
16 #else
17 #define _Const_(x)      x
18 #endif
19
20 #define CW_RC           _Const_(0x0C00) /* rounding control */
21 #define CW_PC           _Const_(0x0300) /* precision control */
22
23 #define CW_Precision    Const_(0x0020)  /* loss of precision mask */
24 #define CW_Underflow    Const_(0x0010)  /* underflow mask */
25 #define CW_Overflow     Const_(0x0008)  /* overflow mask */
26 #define CW_ZeroDiv      Const_(0x0004)  /* divide by zero mask */
27 #define CW_Denormal     Const_(0x0002)  /* denormalized operand mask */
28 #define CW_Invalid      Const_(0x0001)  /* invalid operation mask */
29
30 #define CW_Exceptions   _Const_(0x003f) /* all masks */
31
32 #define RC_RND          _Const_(0x0000)
33 #define RC_DOWN         _Const_(0x0400)
34 #define RC_UP           _Const_(0x0800)
35 #define RC_CHOP         _Const_(0x0C00)
36
37 /* p 15-5: Precision control bits affect only the following:
38    ADD, SUB(R), MUL, DIV(R), and SQRT */
39 #define PR_24_BITS        _Const_(0x000)
40 #define PR_53_BITS        _Const_(0x200)
41 #define PR_64_BITS        _Const_(0x300)
42 #define PR_RESERVED_BITS  _Const_(0x100)
43 /* FULL_PRECISION simulates all exceptions masked */
44 #define FULL_PRECISION  (PR_64_BITS | RC_RND | 0x3f)
45
46 #endif /* _CONTROLW_H_ */