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1 /* decQuad module header for the decNumber C Library.
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2 Copyright (C) 2007, 2009 Free Software Foundation, Inc.
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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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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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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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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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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 /* decQuad.h -- Decimal 128-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 /* This include file is always included by decSingle and decDouble, */
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32 /* and therefore also holds useful constants used by all three. */
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33
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34 #if !defined(DECQUAD)
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35 #define DECQUAD
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36
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37 #define DECQUADNAME "decimalQuad" /* Short name */
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38 #define DECQUADTITLE "Decimal 128-bit datum" /* Verbose name */
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39 #define DECQUADAUTHOR "Mike Cowlishaw" /* Who to blame */
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40
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41 /* parameters for decQuads */
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42 #define DECQUAD_Bytes 16 /* length */
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43 #define DECQUAD_Pmax 34 /* maximum precision (digits) */
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44 #define DECQUAD_Emin -6143 /* minimum adjusted exponent */
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45 #define DECQUAD_Emax 6144 /* maximum adjusted exponent */
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46 #define DECQUAD_EmaxD 4 /* maximum exponent digits */
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47 #define DECQUAD_Bias 6176 /* bias for the exponent */
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48 #define DECQUAD_String 43 /* maximum string length, +1 */
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49 #define DECQUAD_EconL 12 /* exponent continuation length */
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50 #define DECQUAD_Declets 11 /* count of declets */
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51 /* highest biased exponent (Elimit-1) */
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52 #define DECQUAD_Ehigh (DECQUAD_Emax + DECQUAD_Bias - (DECQUAD_Pmax-1))
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53
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54 /* Required include */
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55 #include "decContext.h"
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56
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57 /* The decQuad decimal 128-bit type, accessible by various types */
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58 typedef union {
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59 uint8_t bytes[DECQUAD_Bytes]; /* fields: 1, 5, 12, 110 bits */
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60 uint16_t shorts[DECQUAD_Bytes/2];
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61 uint32_t words[DECQUAD_Bytes/4];
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62 } decQuad;
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63
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64 /* ---------------------------------------------------------------- */
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65 /* Shared constants */
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66 /* ---------------------------------------------------------------- */
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67
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68 /* sign and special values [top 32-bits; last two bits are don't-care
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69 for Infinity on input, last bit don't-care for NaNs] */
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70 #define DECFLOAT_Sign 0x80000000 /* 1 00000 00 Sign */
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71 #define DECFLOAT_NaN 0x7c000000 /* 0 11111 00 NaN generic */
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72 #define DECFLOAT_qNaN 0x7c000000 /* 0 11111 00 qNaN */
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73 #define DECFLOAT_sNaN 0x7e000000 /* 0 11111 10 sNaN */
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74 #define DECFLOAT_Inf 0x78000000 /* 0 11110 00 Infinity */
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75 #define DECFLOAT_MinSp 0x78000000 /* minimum special value */
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76 /* [specials are all >=MinSp] */
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77 /* Sign nibble constants */
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78 #if !defined(DECPPLUSALT)
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79 #define DECPPLUSALT 0x0A /* alternate plus nibble */
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80 #define DECPMINUSALT 0x0B /* alternate minus nibble */
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81 #define DECPPLUS 0x0C /* preferred plus nibble */
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82 #define DECPMINUS 0x0D /* preferred minus nibble */
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83 #define DECPPLUSALT2 0x0E /* alternate plus nibble */
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84 #define DECPUNSIGNED 0x0F /* alternate plus nibble (unsigned) */
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85 #endif
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86
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87 /* ---------------------------------------------------------------- */
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88 /* Routines -- implemented as decFloat routines in common files */
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89 /* ---------------------------------------------------------------- */
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90
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91 #include "decQuadSymbols.h"
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92
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93 /* Utilities and conversions, extractors, etc.) */
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94 extern decQuad * decQuadFromBCD(decQuad *, int32_t, const uint8_t *, int32_t);
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95 extern decQuad * decQuadFromInt32(decQuad *, int32_t);
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96 extern decQuad * decQuadFromPacked(decQuad *, int32_t, const uint8_t *);
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97 extern decQuad * decQuadFromString(decQuad *, const char *, decContext *);
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98 extern decQuad * decQuadFromUInt32(decQuad *, uint32_t);
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99 extern int32_t decQuadGetCoefficient(const decQuad *, uint8_t *);
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100 extern int32_t decQuadGetExponent(const decQuad *);
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101 extern decQuad * decQuadSetCoefficient(decQuad *, const uint8_t *, int32_t);
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102 extern decQuad * decQuadSetExponent(decQuad *, decContext *, int32_t);
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103 extern void decQuadShow(const decQuad *, const char *);
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104 extern int32_t decQuadToBCD(const decQuad *, int32_t *, uint8_t *);
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105 extern char * decQuadToEngString(const decQuad *, char *);
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106 extern int32_t decQuadToInt32(const decQuad *, decContext *, enum rounding);
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107 extern int32_t decQuadToInt32Exact(const decQuad *, decContext *, enum rounding);
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108 extern int32_t decQuadToPacked(const decQuad *, int32_t *, uint8_t *);
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109 extern char * decQuadToString(const decQuad *, char *);
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110 extern uint32_t decQuadToUInt32(const decQuad *, decContext *, enum rounding);
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111 extern uint32_t decQuadToUInt32Exact(const decQuad *, decContext *, enum rounding);
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112 extern decQuad * decQuadZero(decQuad *);
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113
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114 /* Computational (result is a decQuad) */
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115 extern decQuad * decQuadAbs(decQuad *, const decQuad *, decContext *);
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116 extern decQuad * decQuadAdd(decQuad *, const decQuad *, const decQuad *, decContext *);
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117 extern decQuad * decQuadAnd(decQuad *, const decQuad *, const decQuad *, decContext *);
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118 extern decQuad * decQuadDivide(decQuad *, const decQuad *, const decQuad *, decContext *);
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119 extern decQuad * decQuadDivideInteger(decQuad *, const decQuad *, const decQuad *, decContext *);
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120 extern decQuad * decQuadFMA(decQuad *, const decQuad *, const decQuad *, const decQuad *, decContext *);
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121 extern decQuad * decQuadInvert(decQuad *, const decQuad *, decContext *);
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122 extern decQuad * decQuadLogB(decQuad *, const decQuad *, decContext *);
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123 extern decQuad * decQuadMax(decQuad *, const decQuad *, const decQuad *, decContext *);
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124 extern decQuad * decQuadMaxMag(decQuad *, const decQuad *, const decQuad *, decContext *);
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125 extern decQuad * decQuadMin(decQuad *, const decQuad *, const decQuad *, decContext *);
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126 extern decQuad * decQuadMinMag(decQuad *, const decQuad *, const decQuad *, decContext *);
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127 extern decQuad * decQuadMinus(decQuad *, const decQuad *, decContext *);
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128 extern decQuad * decQuadMultiply(decQuad *, const decQuad *, const decQuad *, decContext *);
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129 extern decQuad * decQuadNextMinus(decQuad *, const decQuad *, decContext *);
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130 extern decQuad * decQuadNextPlus(decQuad *, const decQuad *, decContext *);
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131 extern decQuad * decQuadNextToward(decQuad *, const decQuad *, const decQuad *, decContext *);
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132 extern decQuad * decQuadOr(decQuad *, const decQuad *, const decQuad *, decContext *);
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133 extern decQuad * decQuadPlus(decQuad *, const decQuad *, decContext *);
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134 extern decQuad * decQuadQuantize(decQuad *, const decQuad *, const decQuad *, decContext *);
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135 extern decQuad * decQuadReduce(decQuad *, const decQuad *, decContext *);
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136 extern decQuad * decQuadRemainder(decQuad *, const decQuad *, const decQuad *, decContext *);
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137 extern decQuad * decQuadRemainderNear(decQuad *, const decQuad *, const decQuad *, decContext *);
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138 extern decQuad * decQuadRotate(decQuad *, const decQuad *, const decQuad *, decContext *);
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139 extern decQuad * decQuadScaleB(decQuad *, const decQuad *, const decQuad *, decContext *);
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140 extern decQuad * decQuadShift(decQuad *, const decQuad *, const decQuad *, decContext *);
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141 extern decQuad * decQuadSubtract(decQuad *, const decQuad *, const decQuad *, decContext *);
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142 extern decQuad * decQuadToIntegralValue(decQuad *, const decQuad *, decContext *, enum rounding);
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143 extern decQuad * decQuadToIntegralExact(decQuad *, const decQuad *, decContext *);
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144 extern decQuad * decQuadXor(decQuad *, const decQuad *, const decQuad *, decContext *);
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145
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146 /* Comparisons */
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147 extern decQuad * decQuadCompare(decQuad *, const decQuad *, const decQuad *, decContext *);
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148 extern decQuad * decQuadCompareSignal(decQuad *, const decQuad *, const decQuad *, decContext *);
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149 extern decQuad * decQuadCompareTotal(decQuad *, const decQuad *, const decQuad *);
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150 extern decQuad * decQuadCompareTotalMag(decQuad *, const decQuad *, const decQuad *);
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151
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152 /* Copies */
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153 extern decQuad * decQuadCanonical(decQuad *, const decQuad *);
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154 extern decQuad * decQuadCopy(decQuad *, const decQuad *);
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155 extern decQuad * decQuadCopyAbs(decQuad *, const decQuad *);
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156 extern decQuad * decQuadCopyNegate(decQuad *, const decQuad *);
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157 extern decQuad * decQuadCopySign(decQuad *, const decQuad *, const decQuad *);
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158
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159 /* Non-computational */
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160 extern enum decClass decQuadClass(const decQuad *);
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161 extern const char * decQuadClassString(const decQuad *);
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162 extern uint32_t decQuadDigits(const decQuad *);
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163 extern uint32_t decQuadIsCanonical(const decQuad *);
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164 extern uint32_t decQuadIsFinite(const decQuad *);
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165 extern uint32_t decQuadIsInteger(const decQuad *);
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166 extern uint32_t decQuadIsInfinite(const decQuad *);
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167 extern uint32_t decQuadIsNaN(const decQuad *);
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168 extern uint32_t decQuadIsNormal(const decQuad *);
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169 extern uint32_t decQuadIsSignaling(const decQuad *);
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170 extern uint32_t decQuadIsSignalling(const decQuad *);
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171 extern uint32_t decQuadIsSigned(const decQuad *);
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172 extern uint32_t decQuadIsSubnormal(const decQuad *);
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173 extern uint32_t decQuadIsZero(const decQuad *);
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174 extern uint32_t decQuadRadix(const decQuad *);
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175 extern uint32_t decQuadSameQuantum(const decQuad *, const decQuad *);
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176 extern const char * decQuadVersion(void);
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177
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178 /* decNumber conversions; these are implemented as macros so as not */
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179 /* to force a dependency on decimal128 and decNumber in decQuad. */
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180 #define decQuadToNumber(dq, dn) decimal128ToNumber((decimal128 *)(dq), dn)
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181 #define decQuadFromNumber(dq, dn, set) (decQuad *)decimal128FromNumber((decimal128 *)(dq), dn, set)
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182
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183 #endif
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