You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
156 lines
10 KiB
C
156 lines
10 KiB
C
9 years ago
|
/* ------------------------------------------------------------------ */
|
||
|
|
/* decDouble.h -- Decimal 64-bit format module header */
|
||
|
|
/* ------------------------------------------------------------------ */
|
||
|
|
/* Copyright (c) IBM Corporation, 2000, 2010. All rights reserved. */
|
||
|
|
/* */
|
||
|
|
/* This software is made available under the terms of the */
|
||
|
|
/* ICU License -- ICU 1.8.1 and later. */
|
||
|
|
/* */
|
||
|
|
/* The description and User's Guide ("The decNumber C Library") for */
|
||
|
|
/* this software is included in the package as decNumber.pdf. This */
|
||
|
|
/* document is also available in HTML, together with specifications, */
|
||
|
|
/* testcases, and Web links, on the General Decimal Arithmetic page. */
|
||
|
|
/* */
|
||
|
|
/* Please send comments, suggestions, and corrections to the author: */
|
||
|
|
/* mfc@uk.ibm.com */
|
||
|
|
/* Mike Cowlishaw, IBM Fellow */
|
||
|
|
/* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */
|
||
|
|
/* ------------------------------------------------------------------ */
|
||
|
|
|
||
|
|
#if !defined(DECDOUBLE)
|
||
|
|
#define DECDOUBLE
|
||
|
|
|
||
|
|
#define DECDOUBLENAME "decimalDouble" /* Short name */
|
||
|
|
#define DECDOUBLETITLE "Decimal 64-bit datum" /* Verbose name */
|
||
|
|
#define DECDOUBLEAUTHOR "Mike Cowlishaw" /* Who to blame */
|
||
|
|
|
||
|
|
/* parameters for decDoubles */
|
||
|
|
#define DECDOUBLE_Bytes 8 /* length */
|
||
|
|
#define DECDOUBLE_Pmax 16 /* maximum precision (digits) */
|
||
|
|
#define DECDOUBLE_Emin -383 /* minimum adjusted exponent */
|
||
|
|
#define DECDOUBLE_Emax 384 /* maximum adjusted exponent */
|
||
|
|
#define DECDOUBLE_EmaxD 3 /* maximum exponent digits */
|
||
|
|
#define DECDOUBLE_Bias 398 /* bias for the exponent */
|
||
|
|
#define DECDOUBLE_String 25 /* maximum string length, +1 */
|
||
|
|
#define DECDOUBLE_EconL 8 /* exponent continuation length */
|
||
|
|
#define DECDOUBLE_Declets 5 /* count of declets */
|
||
|
|
/* highest biased exponent (Elimit-1) */
|
||
|
|
#define DECDOUBLE_Ehigh (DECDOUBLE_Emax + DECDOUBLE_Bias - (DECDOUBLE_Pmax-1))
|
||
|
|
|
||
|
|
/* Required includes */
|
||
|
|
#include "decContext.h"
|
||
|
|
#include "decQuad.h"
|
||
|
|
|
||
|
|
/* The decDouble decimal 64-bit type, accessible by all sizes */
|
||
|
|
typedef union {
|
||
|
|
uint8_t bytes[DECDOUBLE_Bytes]; /* fields: 1, 5, 8, 50 bits */
|
||
|
|
uint16_t shorts[DECDOUBLE_Bytes/2];
|
||
|
|
uint32_t words[DECDOUBLE_Bytes/4];
|
||
|
|
#if DECUSE64
|
||
|
|
uint64_t longs[DECDOUBLE_Bytes/8];
|
||
|
|
#endif
|
||
|
|
} decDouble;
|
||
|
|
|
||
|
|
/* ---------------------------------------------------------------- */
|
||
|
|
/* Routines -- implemented as decFloat routines in common files */
|
||
|
|
/* ---------------------------------------------------------------- */
|
||
|
|
|
||
|
|
/* Utilities and conversions, extractors, etc.) */
|
||
|
|
extern decDouble * decDoubleFromBCD(decDouble *, int32_t, const uint8_t *, int32_t);
|
||
|
|
extern decDouble * decDoubleFromInt32(decDouble *, int32_t);
|
||
|
|
extern decDouble * decDoubleFromPacked(decDouble *, int32_t, const uint8_t *);
|
||
|
|
extern decDouble * decDoubleFromPackedChecked(decDouble *, int32_t, const uint8_t *);
|
||
|
|
extern decDouble * decDoubleFromString(decDouble *, const char *, decContext *);
|
||
|
|
extern decDouble * decDoubleFromUInt32(decDouble *, uint32_t);
|
||
|
|
extern decDouble * decDoubleFromWider(decDouble *, const decQuad *, decContext *);
|
||
|
|
extern int32_t decDoubleGetCoefficient(const decDouble *, uint8_t *);
|
||
|
|
extern int32_t decDoubleGetExponent(const decDouble *);
|
||
|
|
extern decDouble * decDoubleSetCoefficient(decDouble *, const uint8_t *, int32_t);
|
||
|
|
extern decDouble * decDoubleSetExponent(decDouble *, decContext *, int32_t);
|
||
|
|
extern void decDoubleShow(const decDouble *, const char *);
|
||
|
|
extern int32_t decDoubleToBCD(const decDouble *, int32_t *, uint8_t *);
|
||
|
|
extern char * decDoubleToEngString(const decDouble *, char *);
|
||
|
|
extern int32_t decDoubleToInt32(const decDouble *, decContext *, enum rounding);
|
||
|
|
extern int32_t decDoubleToInt32Exact(const decDouble *, decContext *, enum rounding);
|
||
|
|
extern int32_t decDoubleToPacked(const decDouble *, int32_t *, uint8_t *);
|
||
|
|
extern char * decDoubleToString(const decDouble *, char *);
|
||
|
|
extern uint32_t decDoubleToUInt32(const decDouble *, decContext *, enum rounding);
|
||
|
|
extern uint32_t decDoubleToUInt32Exact(const decDouble *, decContext *, enum rounding);
|
||
|
|
extern decQuad * decDoubleToWider(const decDouble *, decQuad *);
|
||
|
|
extern decDouble * decDoubleZero(decDouble *);
|
||
|
|
|
||
|
|
/* Computational (result is a decDouble) */
|
||
|
|
extern decDouble * decDoubleAbs(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleAdd(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleAnd(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleDivide(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleDivideInteger(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleFMA(decDouble *, const decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleInvert(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleLogB(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleMax(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleMaxMag(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleMin(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleMinMag(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleMinus(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleMultiply(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleNextMinus(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleNextPlus(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleNextToward(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleOr(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoublePlus(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleQuantize(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleReduce(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleRemainder(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleRemainderNear(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleRotate(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleScaleB(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleShift(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleSubtract(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleToIntegralValue(decDouble *, const decDouble *, decContext *, enum rounding);
|
||
|
|
extern decDouble * decDoubleToIntegralExact(decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleXor(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
|
||
|
|
/* Comparisons */
|
||
|
|
extern decDouble * decDoubleCompare(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleCompareSignal(decDouble *, const decDouble *, const decDouble *, decContext *);
|
||
|
|
extern decDouble * decDoubleCompareTotal(decDouble *, const decDouble *, const decDouble *);
|
||
|
|
extern decDouble * decDoubleCompareTotalMag(decDouble *, const decDouble *, const decDouble *);
|
||
|
|
|
||
|
|
/* Copies */
|
||
|
|
extern decDouble * decDoubleCanonical(decDouble *, const decDouble *);
|
||
|
|
extern decDouble * decDoubleCopy(decDouble *, const decDouble *);
|
||
|
|
extern decDouble * decDoubleCopyAbs(decDouble *, const decDouble *);
|
||
|
|
extern decDouble * decDoubleCopyNegate(decDouble *, const decDouble *);
|
||
|
|
extern decDouble * decDoubleCopySign(decDouble *, const decDouble *, const decDouble *);
|
||
|
|
|
||
|
|
/* Non-computational */
|
||
|
|
extern enum decClass decDoubleClass(const decDouble *);
|
||
|
|
extern const char * decDoubleClassString(const decDouble *);
|
||
|
|
extern uint32_t decDoubleDigits(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsCanonical(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsFinite(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsInfinite(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsInteger(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsLogical(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsNaN(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsNegative(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsNormal(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsPositive(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsSignaling(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsSignalling(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsSigned(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsSubnormal(const decDouble *);
|
||
|
|
extern uint32_t decDoubleIsZero(const decDouble *);
|
||
|
|
extern uint32_t decDoubleRadix(const decDouble *);
|
||
|
|
extern uint32_t decDoubleSameQuantum(const decDouble *, const decDouble *);
|
||
|
|
extern const char * decDoubleVersion(void);
|
||
|
|
|
||
|
|
/* decNumber conversions; these are implemented as macros so as not */
|
||
|
|
/* to force a dependency on decimal64 and decNumber in decDouble. */
|
||
|
|
/* decDoubleFromNumber returns a decimal64 * to avoid warnings. */
|
||
|
|
#define decDoubleToNumber(dq, dn) decimal64ToNumber((decimal64 *)(dq), dn)
|
||
|
|
#define decDoubleFromNumber(dq, dn, set) decimal64FromNumber((decimal64 *)(dq), dn, set)
|
||
|
|
|
||
|
|
#endif
|