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_ */ 46