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/ The CICA Windows Explosion! / The CICA Windows Explosion! - Disc 2.iso / programr / dpmigcc5.zip / RSX / SOURCE / FPU-EMU / CONTROL_.H next >
C/C++ Source or Header  |  1994-05-27  |  2KB  |  46 lines
  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 __ASSEMBLER__
  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.