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annotate libdecnumber/decDouble.h @ 0:a06113de4d67

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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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children 77e2b8dfacca
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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1 /* decDouble module header for the decNumber C Library.
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2 Copyright (C) 2007, 2009 Free Software Foundation, Inc.
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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3 Contributed by IBM Corporation. Author Mike Cowlishaw.
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4
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5 This file is part of GCC.
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6
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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7 GCC is free software; you can redistribute it and/or modify it under
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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8 the terms of the GNU General Public License as published by the Free
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 Under Section 7 of GPL version 3, you are granted additional
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kent <kent@cr.ie.u-ryukyu.ac.jp>
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18 permissions described in the GCC Runtime Library Exception, version
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19 3.1, as published by the Free Software Foundation.
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20
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21 You should have received a copy of the GNU General Public License and
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22 a copy of the GCC Runtime Library Exception along with this program;
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23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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24 <http://www.gnu.org/licenses/>. */
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25
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26 /* ------------------------------------------------------------------ */
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27 /* decDouble.h -- Decimal 64-bit format module header */
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28 /* ------------------------------------------------------------------ */
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29 /* Please see decFloats.h for an overview and documentation details. */
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30 /* ------------------------------------------------------------------ */
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31
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32 #if !defined(DECDOUBLE)
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33 #define DECDOUBLE
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34
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35 #define DECDOUBLENAME "decimalDouble" /* Short name */
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36 #define DECDOUBLETITLE "Decimal 64-bit datum" /* Verbose name */
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37 #define DECDOUBLEAUTHOR "Mike Cowlishaw" /* Who to blame */
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38
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39 /* parameters for decDoubles */
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40 #define DECDOUBLE_Bytes 8 /* length */
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41 #define DECDOUBLE_Pmax 16 /* maximum precision (digits) */
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42 #define DECDOUBLE_Emin -383 /* minimum adjusted exponent */
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43 #define DECDOUBLE_Emax 384 /* maximum adjusted exponent */
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44 #define DECDOUBLE_EmaxD 3 /* maximum exponent digits */
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45 #define DECDOUBLE_Bias 398 /* bias for the exponent */
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46 #define DECDOUBLE_String 25 /* maximum string length, +1 */
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47 #define DECDOUBLE_EconL 8 /* exponent continuation length */
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48 #define DECDOUBLE_Declets 5 /* count of declets */
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49 /* highest biased exponent (Elimit-1) */
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50 #define DECDOUBLE_Ehigh (DECDOUBLE_Emax + DECDOUBLE_Bias - (DECDOUBLE_Pmax-1))
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51
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52 /* Required includes */
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53 #include "decContext.h"
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54 #include "decQuad.h"
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55
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56 /* The decDouble decimal 64-bit type, accessible by various types */
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57 typedef union {
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58 uint8_t bytes[DECDOUBLE_Bytes]; /* fields: 1, 5, 8, 50 bits */
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59 uint16_t shorts[DECDOUBLE_Bytes/2];
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60 uint32_t words[DECDOUBLE_Bytes/4];
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61 } decDouble;
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62
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63 /* ---------------------------------------------------------------- */
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64 /* Routines -- implemented as decFloat routines in common files */
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65 /* ---------------------------------------------------------------- */
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66
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67 #include "decDoubleSymbols.h"
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68
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69 /* Utilities and conversions, extractors, etc.) */
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70 extern decDouble * decDoubleFromBCD(decDouble *, int32_t, const uint8_t *, int32_t);
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71 extern decDouble * decDoubleFromInt32(decDouble *, int32_t);
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72 extern decDouble * decDoubleFromPacked(decDouble *, int32_t, const uint8_t *);
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73 extern decDouble * decDoubleFromString(decDouble *, const char *, decContext *);
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74 extern decDouble * decDoubleFromUInt32(decDouble *, uint32_t);
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75 extern decDouble * decDoubleFromWider(decDouble *, const decQuad *, decContext *);
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76 extern int32_t decDoubleGetCoefficient(const decDouble *, uint8_t *);
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77 extern int32_t decDoubleGetExponent(const decDouble *);
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78 extern decDouble * decDoubleSetCoefficient(decDouble *, const uint8_t *, int32_t);
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79 extern decDouble * decDoubleSetExponent(decDouble *, decContext *, int32_t);
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80 extern void decDoubleShow(const decDouble *, const char *);
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81 extern int32_t decDoubleToBCD(const decDouble *, int32_t *, uint8_t *);
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82 extern char * decDoubleToEngString(const decDouble *, char *);
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83 extern int32_t decDoubleToInt32(const decDouble *, decContext *, enum rounding);
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84 extern int32_t decDoubleToInt32Exact(const decDouble *, decContext *, enum rounding);
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85 extern int32_t decDoubleToPacked(const decDouble *, int32_t *, uint8_t *);
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86 extern char * decDoubleToString(const decDouble *, char *);
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87 extern uint32_t decDoubleToUInt32(const decDouble *, decContext *, enum rounding);
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88 extern uint32_t decDoubleToUInt32Exact(const decDouble *, decContext *, enum rounding);
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89 extern decQuad * decDoubleToWider(const decDouble *, decQuad *);
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90 extern decDouble * decDoubleZero(decDouble *);
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91
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92 /* Computational (result is a decDouble) */
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93 extern decDouble * decDoubleAbs(decDouble *, const decDouble *, decContext *);
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94 extern decDouble * decDoubleAdd(decDouble *, const decDouble *, const decDouble *, decContext *);
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95 extern decDouble * decDoubleAnd(decDouble *, const decDouble *, const decDouble *, decContext *);
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96 extern decDouble * decDoubleDivide(decDouble *, const decDouble *, const decDouble *, decContext *);
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97 extern decDouble * decDoubleDivideInteger(decDouble *, const decDouble *, const decDouble *, decContext *);
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98 extern decDouble * decDoubleFMA(decDouble *, const decDouble *, const decDouble *, const decDouble *, decContext *);
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99 extern decDouble * decDoubleInvert(decDouble *, const decDouble *, decContext *);
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100 extern decDouble * decDoubleLogB(decDouble *, const decDouble *, decContext *);
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101 extern decDouble * decDoubleMax(decDouble *, const decDouble *, const decDouble *, decContext *);
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102 extern decDouble * decDoubleMaxMag(decDouble *, const decDouble *, const decDouble *, decContext *);
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103 extern decDouble * decDoubleMin(decDouble *, const decDouble *, const decDouble *, decContext *);
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104 extern decDouble * decDoubleMinMag(decDouble *, const decDouble *, const decDouble *, decContext *);
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105 extern decDouble * decDoubleMinus(decDouble *, const decDouble *, decContext *);
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106 extern decDouble * decDoubleMultiply(decDouble *, const decDouble *, const decDouble *, decContext *);
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107 extern decDouble * decDoubleNextMinus(decDouble *, const decDouble *, decContext *);
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108 extern decDouble * decDoubleNextPlus(decDouble *, const decDouble *, decContext *);
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109 extern decDouble * decDoubleNextToward(decDouble *, const decDouble *, const decDouble *, decContext *);
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110 extern decDouble * decDoubleOr(decDouble *, const decDouble *, const decDouble *, decContext *);
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111 extern decDouble * decDoublePlus(decDouble *, const decDouble *, decContext *);
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112 extern decDouble * decDoubleQuantize(decDouble *, const decDouble *, const decDouble *, decContext *);
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113 extern decDouble * decDoubleReduce(decDouble *, const decDouble *, decContext *);
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114 extern decDouble * decDoubleRemainder(decDouble *, const decDouble *, const decDouble *, decContext *);
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115 extern decDouble * decDoubleRemainderNear(decDouble *, const decDouble *, const decDouble *, decContext *);
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116 extern decDouble * decDoubleRotate(decDouble *, const decDouble *, const decDouble *, decContext *);
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117 extern decDouble * decDoubleScaleB(decDouble *, const decDouble *, const decDouble *, decContext *);
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118 extern decDouble * decDoubleShift(decDouble *, const decDouble *, const decDouble *, decContext *);
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119 extern decDouble * decDoubleSubtract(decDouble *, const decDouble *, const decDouble *, decContext *);
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120 extern decDouble * decDoubleToIntegralValue(decDouble *, const decDouble *, decContext *, enum rounding);
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121 extern decDouble * decDoubleToIntegralExact(decDouble *, const decDouble *, decContext *);
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122 extern decDouble * decDoubleXor(decDouble *, const decDouble *, const decDouble *, decContext *);
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123
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124 /* Comparisons */
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125 extern decDouble * decDoubleCompare(decDouble *, const decDouble *, const decDouble *, decContext *);
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126 extern decDouble * decDoubleCompareSignal(decDouble *, const decDouble *, const decDouble *, decContext *);
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127 extern decDouble * decDoubleCompareTotal(decDouble *, const decDouble *, const decDouble *);
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128 extern decDouble * decDoubleCompareTotalMag(decDouble *, const decDouble *, const decDouble *);
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129
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130 /* Copies */
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131 extern decDouble * decDoubleCanonical(decDouble *, const decDouble *);
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132 extern decDouble * decDoubleCopy(decDouble *, const decDouble *);
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133 extern decDouble * decDoubleCopyAbs(decDouble *, const decDouble *);
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134 extern decDouble * decDoubleCopyNegate(decDouble *, const decDouble *);
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135 extern decDouble * decDoubleCopySign(decDouble *, const decDouble *, const decDouble *);
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136
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137 /* Non-computational */
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138 extern enum decClass decDoubleClass(const decDouble *);
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139 extern const char * decDoubleClassString(const decDouble *);
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140 extern uint32_t decDoubleDigits(const decDouble *);
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141 extern uint32_t decDoubleIsCanonical(const decDouble *);
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142 extern uint32_t decDoubleIsFinite(const decDouble *);
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143 extern uint32_t decDoubleIsInfinite(const decDouble *);
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144 extern uint32_t decDoubleIsInteger(const decDouble *);
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145 extern uint32_t decDoubleIsNaN(const decDouble *);
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146 extern uint32_t decDoubleIsNormal(const decDouble *);
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147 extern uint32_t decDoubleIsSignaling(const decDouble *);
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148 extern uint32_t decDoubleIsSignalling(const decDouble *);
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149 extern uint32_t decDoubleIsSigned(const decDouble *);
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150 extern uint32_t decDoubleIsSubnormal(const decDouble *);
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151 extern uint32_t decDoubleIsZero(const decDouble *);
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152 extern uint32_t decDoubleRadix(const decDouble *);
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153 extern uint32_t decDoubleSameQuantum(const decDouble *, const decDouble *);
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154 extern const char * decDoubleVersion(void);
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155
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156 /* decNumber conversions; these are implemented as macros so as not */
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157 /* to force a dependency on decimal64 and decNumber in decDouble. */
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158 #define decDoubleToNumber(dq, dn) decimal64ToNumber((decimal64 *)(dq), dn)
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159 #define decDoubleFromNumber(dq, dn, set) (decDouble *)decimal64FromNumber((decimal64 *)(dq), dn, set)
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160
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161 #endif