libdecnumber/decDouble.h

   1 /* decDouble module header for the decNumber C Library.
   2    Copyright (C) 2007-2020 Free Software Foundation, Inc.
   3    Contributed by IBM Corporation.  Author Mike Cowlishaw.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 3, or (at your option) any later
  10    version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15    for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 /* ------------------------------------------------------------------ */
  27 /* decDouble.h -- Decimal 64-bit format module header                 */
  28 /* ------------------------------------------------------------------ */
  29
  30 #if !defined(DECDOUBLE)
  31   #define DECDOUBLE
  32
  33   #define DECDOUBLENAME       "decimalDouble"         /* Short name   */
  34   #define DECDOUBLETITLE      "Decimal 64-bit datum"  /* Verbose name */
  35   #define DECDOUBLEAUTHOR     "Mike Cowlishaw"        /* Who to blame */
  36
  37   /* parameters for decDoubles */
  38   #define DECDOUBLE_Bytes   8      /* length                          */
  39   #define DECDOUBLE_Pmax    16     /* maximum precision (digits)      */
  40   #define DECDOUBLE_Emin   -383    /* minimum adjusted exponent       */
  41   #define DECDOUBLE_Emax    384    /* maximum adjusted exponent       */
  42   #define DECDOUBLE_EmaxD   3      /* maximum exponent digits         */
  43   #define DECDOUBLE_Bias    398    /* bias for the exponent           */
  44   #define DECDOUBLE_String  25     /* maximum string length, +1       */
  45   #define DECDOUBLE_EconL   8      /* exponent continuation length    */
  46   #define DECDOUBLE_Declets 5      /* count of declets                */
  47   /* highest biased exponent (Elimit-1) */
  48   #define DECDOUBLE_Ehigh (DECDOUBLE_Emax + DECDOUBLE_Bias - (DECDOUBLE_Pmax-1))
  49
  50   /* Required includes                                                */
  51   #include "decContext.h"
  52   #include "decQuad.h"
  53
  54   /* The decDouble decimal 64-bit type, accessible by all sizes */
  55   typedef union {
  56     uint8_t   bytes[DECDOUBLE_Bytes];   /* fields: 1, 5, 8, 50 bits */
  57     uint16_t shorts[DECDOUBLE_Bytes/2];
  58     uint32_t  words[DECDOUBLE_Bytes/4];
  59     #if DECUSE64
  60     uint64_t  longs[DECDOUBLE_Bytes/8];
  61     #endif
  62     } decDouble;
  63
  64   /* ---------------------------------------------------------------- */
  65   /* Routines -- implemented as decFloat routines in common files     */
  66   /* ---------------------------------------------------------------- */
  67
  68   #include "decDoubleSymbols.h"
  69
  70   /* Utilities and conversions, extractors, etc.) */
  71   extern decDouble * decDoubleFromBCD(decDouble *, int32_t, const uint8_t *, int32_t);
  72   extern decDouble * decDoubleFromInt32(decDouble *, int32_t);
  73   extern decDouble * decDoubleFromPacked(decDouble *, int32_t, const uint8_t *);
  74   extern decDouble * decDoubleFromPackedChecked(decDouble *, int32_t, const uint8_t *);
  75   extern decDouble * decDoubleFromString(decDouble *, const char *, decContext *);
  76   extern decDouble * decDoubleFromUInt32(decDouble *, uint32_t);
  77   extern decDouble * decDoubleFromWider(decDouble *, const decQuad *, decContext *);
  78   extern int32_t     decDoubleGetCoefficient(const decDouble *, uint8_t *);
  79   extern int32_t     decDoubleGetExponent(const decDouble *);
  80   extern decDouble * decDoubleSetCoefficient(decDouble *, const uint8_t *, int32_t);
  81   extern decDouble * decDoubleSetExponent(decDouble *, decContext *, int32_t);
  82   extern void        decDoubleShow(const decDouble *, const char *);
  83   extern int32_t     decDoubleToBCD(const decDouble *, int32_t *, uint8_t *);
  84   extern char      * decDoubleToEngString(const decDouble *, char *);
  85   extern int32_t     decDoubleToInt32(const decDouble *, decContext *, enum rounding);
  86   extern int32_t     decDoubleToInt32Exact(const decDouble *, decContext *, enum rounding);
  87   extern int32_t     decDoubleToPacked(const decDouble *, int32_t *, uint8_t *);
  88   extern char      * decDoubleToString(const decDouble *, char *);
  89   extern uint32_t    decDoubleToUInt32(const decDouble *, decContext *, enum rounding);
  90   extern uint32_t    decDoubleToUInt32Exact(const decDouble *, decContext *, enum rounding);
  91   extern decQuad   * decDoubleToWider(const decDouble *, decQuad *);
  92   extern decDouble * decDoubleZero(decDouble *);
  93
  94   /* Computational (result is a decDouble) */
  95   extern decDouble * decDoubleAbs(decDouble *, const decDouble *, decContext *);
  96   extern decDouble * decDoubleAdd(decDouble *, const decDouble *, const decDouble *, decContext *);
  97   extern decDouble * decDoubleAnd(decDouble *, const decDouble *, const decDouble *, decContext *);
  98   extern decDouble * decDoubleDivide(decDouble *, const decDouble *, const decDouble *, decContext *);
  99   extern decDouble * decDoubleDivideInteger(decDouble *, const decDouble *, const decDouble *, decContext *);
 100   extern decDouble * decDoubleFMA(decDouble *, const decDouble *, const decDouble *, const decDouble *, decContext *);
 101   extern decDouble * decDoubleInvert(decDouble *, const decDouble *, decContext *);
 102   extern decDouble * decDoubleLogB(decDouble *, const decDouble *, decContext *);
 103   extern decDouble * decDoubleMax(decDouble *, const decDouble *, const decDouble *, decContext *);
 104   extern decDouble * decDoubleMaxMag(decDouble *, const decDouble *, const decDouble *, decContext *);
 105   extern decDouble * decDoubleMin(decDouble *, const decDouble *, const decDouble *, decContext *);
 106   extern decDouble * decDoubleMinMag(decDouble *, const decDouble *, const decDouble *, decContext *);
 107   extern decDouble * decDoubleMinus(decDouble *, const decDouble *, decContext *);
 108   extern decDouble * decDoubleMultiply(decDouble *, const decDouble *, const decDouble *, decContext *);
 109   extern decDouble * decDoubleNextMinus(decDouble *, const decDouble *, decContext *);
 110   extern decDouble * decDoubleNextPlus(decDouble *, const decDouble *, decContext *);
 111   extern decDouble * decDoubleNextToward(decDouble *, const decDouble *, const decDouble *, decContext *);
 112   extern decDouble * decDoubleOr(decDouble *, const decDouble *, const decDouble *, decContext *);
 113   extern decDouble * decDoublePlus(decDouble *, const decDouble *, decContext *);
 114   extern decDouble * decDoubleQuantize(decDouble *, const decDouble *, const decDouble *, decContext *);
 115   extern decDouble * decDoubleReduce(decDouble *, const decDouble *, decContext *);
 116   extern decDouble * decDoubleRemainder(decDouble *, const decDouble *, const decDouble *, decContext *);
 117   extern decDouble * decDoubleRemainderNear(decDouble *, const decDouble *, const decDouble *, decContext *);
 118   extern decDouble * decDoubleRotate(decDouble *, const decDouble *, const decDouble *, decContext *);
 119   extern decDouble * decDoubleScaleB(decDouble *, const decDouble *, const decDouble *, decContext *);
 120   extern decDouble * decDoubleShift(decDouble *, const decDouble *, const decDouble *, decContext *);
 121   extern decDouble * decDoubleSubtract(decDouble *, const decDouble *, const decDouble *, decContext *);
 122   extern decDouble * decDoubleToIntegralValue(decDouble *, const decDouble *, decContext *, enum rounding);
 123   extern decDouble * decDoubleToIntegralExact(decDouble *, const decDouble *, decContext *);
 124   extern decDouble * decDoubleXor(decDouble *, const decDouble *, const decDouble *, decContext *);
 125
 126   /* Comparisons */
 127   extern decDouble * decDoubleCompare(decDouble *, const decDouble *, const decDouble *, decContext *);
 128   extern decDouble * decDoubleCompareSignal(decDouble *, const decDouble *, const decDouble *, decContext *);
 129   extern decDouble * decDoubleCompareTotal(decDouble *, const decDouble *, const decDouble *);
 130   extern decDouble * decDoubleCompareTotalMag(decDouble *, const decDouble *, const decDouble *);
 131
 132   /* Copies */
 133   extern decDouble * decDoubleCanonical(decDouble *, const decDouble *);
 134   extern decDouble * decDoubleCopy(decDouble *, const decDouble *);
 135   extern decDouble * decDoubleCopyAbs(decDouble *, const decDouble *);
 136   extern decDouble * decDoubleCopyNegate(decDouble *, const decDouble *);
 137   extern decDouble * decDoubleCopySign(decDouble *, const decDouble *, const decDouble *);
 138
 139   /* Non-computational */
 140   extern enum decClass decDoubleClass(const decDouble *);
 141   extern const char *  decDoubleClassString(const decDouble *);
 142   extern uint32_t      decDoubleDigits(const decDouble *);
 143   extern uint32_t      decDoubleIsCanonical(const decDouble *);
 144   extern uint32_t      decDoubleIsFinite(const decDouble *);
 145   extern uint32_t      decDoubleIsInfinite(const decDouble *);
 146   extern uint32_t      decDoubleIsInteger(const decDouble *);
 147   extern uint32_t      decDoubleIsNaN(const decDouble *);
 148   extern uint32_t      decDoubleIsNormal(const decDouble *);
 149   extern uint32_t      decDoubleIsSignaling(const decDouble *);
 150   extern uint32_t      decDoubleIsSignalling(const decDouble *);
 151   extern uint32_t      decDoubleIsSigned(const decDouble *);
 152   extern uint32_t      decDoubleIsSubnormal(const decDouble *);
 153   extern uint32_t      decDoubleIsZero(const decDouble *);
 154   extern uint32_t      decDoubleRadix(const decDouble *);
 155   extern uint32_t      decDoubleSameQuantum(const decDouble *, const decDouble *);
 156   extern const char *  decDoubleVersion(void);
 157
 158   /* decNumber conversions; these are implemented as macros so as not  */
 159   /* to force a dependency on decimal64 and decNumber in decDouble.    */
 160   /* decDoubleFromNumber returns a decimal64 * to avoid warnings.      */
 161   #define decDoubleToNumber(dq, dn) decimal64ToNumber((decimal64 *)(dq), dn)
 162   #define decDoubleFromNumber(dq, dn, set) decimal64FromNumber((decimal64 *)(dq), dn, set)
 163
 164 #endif