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1/* decDouble module header for the decNumber C Library.
2 Copyright (C) 2007, 2009 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
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see 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
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