projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /*---------------------------------------------------------------------------+ |
| 2 | | control_w.h | | |
| 3 | | | | |
| 4 | | Copyright (C) 1992,1993 | | |
| 5 | | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | | |
| 6 | | Australia. E-mail billm@vaxc.cc.monash.edu.au | | |
| 7 | | | | |
| 8 | +---------------------------------------------------------------------------*/ | |
| 9 | ||
| 10 | #ifndef _CONTROLW_H_ | |
| 11 | #define _CONTROLW_H_ | |
| 12 | ||
| 13 | #ifdef __ASSEMBLY__ | |
| 14 | #define _Const_(x) $##x | |
| 15 | #else | |
| 16 | #define _Const_(x) x | |
| 17 | #endif | |
| 18 | ||
| 19 | #define CW_RC _Const_(0x0C00) /* rounding control */ | |
| 20 | #define CW_PC _Const_(0x0300) /* precision control */ | |
| 21 | ||
| 22 | #define CW_Precision Const_(0x0020) /* loss of precision mask */ | |
| 23 | #define CW_Underflow Const_(0x0010) /* underflow mask */ | |
| 24 | #define CW_Overflow Const_(0x0008) /* overflow mask */ | |
| 25 | #define CW_ZeroDiv Const_(0x0004) /* divide by zero mask */ | |
| 26 | #define CW_Denormal Const_(0x0002) /* denormalized operand mask */ | |
| 27 | #define CW_Invalid Const_(0x0001) /* invalid operation mask */ | |
| 28 | ||
| 29 | #define CW_Exceptions _Const_(0x003f) /* all masks */ | |
| 30 | ||
| 31 | #define RC_RND _Const_(0x0000) | |
| 32 | #define RC_DOWN _Const_(0x0400) | |
| 33 | #define RC_UP _Const_(0x0800) | |
| 34 | #define RC_CHOP _Const_(0x0C00) | |
| 35 | ||
| 36 | /* p 15-5: Precision control bits affect only the following: | |
| 37 | ADD, SUB(R), MUL, DIV(R), and SQRT */ | |
| 38 | #define PR_24_BITS _Const_(0x000) | |
| 39 | #define PR_53_BITS _Const_(0x200) | |
| 40 | #define PR_64_BITS _Const_(0x300) | |
| 41 | #define PR_RESERVED_BITS _Const_(0x100) | |
| 42 | /* FULL_PRECISION simulates all exceptions masked */ | |
| 43 | #define FULL_PRECISION (PR_64_BITS | RC_RND | 0x3f) | |
| 44 | ||
| 45 | #endif /* _CONTROLW_H_ */ |