| /*---------------------------------------------------------------------------+ |
| | control_w.h | |
| | | |
| | Copyright (C) 1992,1993 | |
| | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | |
| | Australia. E-mail billm@vaxc.cc.monash.edu.au | |
| | | |
| +---------------------------------------------------------------------------*/ |
| |
| #ifndef _CONTROLW_H_ |
| #define _CONTROLW_H_ |
| |
| #ifdef __ASSEMBLY__ |
| #define _Const_(x) $##x |
| #else |
| #define _Const_(x) x |
| #endif |
| |
| #define CW_RC _Const_(0x0C00) /* rounding control */ |
| #define CW_PC _Const_(0x0300) /* precision control */ |
| |
| #define CW_Precision Const_(0x0020) /* loss of precision mask */ |
| #define CW_Underflow Const_(0x0010) /* underflow mask */ |
| #define CW_Overflow Const_(0x0008) /* overflow mask */ |
| #define CW_ZeroDiv Const_(0x0004) /* divide by zero mask */ |
| #define CW_Denormal Const_(0x0002) /* denormalized operand mask */ |
| #define CW_Invalid Const_(0x0001) /* invalid operation mask */ |
| |
| #define CW_Exceptions _Const_(0x003f) /* all masks */ |
| |
| #define RC_RND _Const_(0x0000) |
| #define RC_DOWN _Const_(0x0400) |
| #define RC_UP _Const_(0x0800) |
| #define RC_CHOP _Const_(0x0C00) |
| |
| /* p 15-5: Precision control bits affect only the following: |
| ADD, SUB(R), MUL, DIV(R), and SQRT */ |
| #define PR_24_BITS _Const_(0x000) |
| #define PR_53_BITS _Const_(0x200) |
| #define PR_64_BITS _Const_(0x300) |
| #define PR_RESERVED_BITS _Const_(0x100) |
| /* FULL_PRECISION simulates all exceptions masked */ |
| #define FULL_PRECISION (PR_64_BITS | RC_RND | 0x3f) |
| |
| #endif /* _CONTROLW_H_ */ |