Subversion Repositories or1k_old

/*---------------------------------------------------------------------------+

 |  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_