sys/arch/sparc/include/fsr.h

   1 /*      $NetBSD: fsr.h,v 1.2.66.3 2004/09/21 13:22:15 skrll Exp $ */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratory.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)fsr.h       8.1 (Berkeley) 6/11/93
  41  */
  42
  43 #ifndef _MACHINE_FSR_H_
  44 #define _MACHINE_FSR_H_
  45
  46 /*
  47  * Bits in FSR.
  48  */
  49 #define FSR_RD          0xc0000000      /* rounding direction */
  50 #define   FSR_RD_RN     0               /* round to nearest */
  51 #define   FSR_RD_RZ     1               /* round towards 0 */
  52 #define   FSR_RD_RP     2               /* round towards +inf */
  53 #define   FSR_RD_RM     3               /* round towards -inf */
  54 #define FSR_RD_SHIFT    30
  55 #define FSR_RD_MASK     0x03
  56
  57 #define FSR_RP          0x30000000      /* extended rounding precision */
  58 #define   FSR_RP_X      0               /* extended stays extended */
  59 #define   FSR_RP_S      1               /* extended => single */
  60 #define   FSR_RP_D      2               /* extended => double */
  61 #define   FSR_RP_80     3               /* extended => 80-bit */
  62 #define FSR_RP_SHIFT    28
  63 #define FSR_RP_MASK     0x03
  64
  65 #define FSR_TEM         0x0f800000      /* trap enable mask */
  66 #define FSR_TEM_SHIFT   23
  67 #define FSR_TEM_MASK    0x1f
  68
  69 #define FSR_NS          0x00400000      /* ``nonstandard mode'' */
  70 #define FSR_AU          0x00400000      /* aka abrupt underflow mode */
  71 #define FSR_MBZ         0x00300000      /* reserved; must be zero */
  72
  73 #define FSR_VER         0x000e0000      /* version bits */
  74 #define FSR_VER_SHIFT   17
  75 #define FSR_VER_MASK    0x07
  76
  77 #define FSR_FTT         0x0001c000      /* FP trap type */
  78 #define   FSR_TT_NONE   0               /* no trap */
  79 #define   FSR_TT_IEEE   1               /* IEEE exception */
  80 #define   FSR_TT_UNFIN  2               /* unfinished operation */
  81 #define   FSR_TT_UNIMP  3               /* unimplemented operation */
  82 #define   FSR_TT_SEQ    4               /* sequence error */
  83 #define   FSR_TT_HWERR  5               /* hardware error (unrecoverable) */
  84 #define FSR_FTT_SHIFT   14
  85 #define FSR_FTT_MASK    0x03
  86
  87 #define FSR_QNE         0x00002000      /* queue not empty */
  88 #define FSR_PR          0x00001000      /* partial result */
  89
  90 #define FSR_FCC         0x00000c00      /* FP condition codes */
  91 #define   FSR_CC_EQ     0               /* f1 = f2 */
  92 #define   FSR_CC_LT     1               /* f1 < f2 */
  93 #define   FSR_CC_GT     2               /* f1 > f2 */
  94 #define   FSR_CC_UO     3               /* (f1,f2) unordered */
  95 #define FSR_FCC_SHIFT   10
  96 #define FSR_FCC_MASK    0x03
  97
  98 #define FSR_AX  0x000003e0              /* accrued exceptions */
  99 #define   FSR_AX_SHIFT  5
 100 #define   FSR_AX_MASK   0x1f
 101 #define FSR_CX  0x0000001f              /* current exceptions */
 102 #define   FSR_CX_SHIFT  0
 103 #define   FSR_CX_MASK   0x1f
 104
 105 /* The following exceptions apply to TEM, AX, and CX. */
 106 #define FSR_NV  0x10                    /* invalid operand */
 107 #define FSR_OF  0x08                    /* overflow */
 108 #define FSR_UF  0x04                    /* underflow */
 109 #define FSR_DZ  0x02                    /* division by zero */
 110 #define FSR_NX  0x01                    /* inexact result */
 111
 112 #endif /* _MACHINE_FSR_H_ */