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178 lines
11 KiB
C
178 lines
11 KiB
C
9 years ago
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/* ------------------------------------------------------------------ */
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/* decQuad.h -- Decimal 128-bit format module header */
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/* ------------------------------------------------------------------ */
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/* Copyright (c) IBM Corporation, 2000, 2010. All rights reserved. */
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/* */
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/* This software is made available under the terms of the */
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/* ICU License -- ICU 1.8.1 and later. */
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/* */
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/* The description and User's Guide ("The decNumber C Library") for */
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/* this software is included in the package as decNumber.pdf. This */
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/* document is also available in HTML, together with specifications, */
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/* testcases, and Web links, on the General Decimal Arithmetic page. */
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/* */
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/* Please send comments, suggestions, and corrections to the author: */
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/* mfc@uk.ibm.com */
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/* Mike Cowlishaw, IBM Fellow */
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/* IBM UK, PO Box 31, Birmingham Road, Warwick CV34 5JL, UK */
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/* ------------------------------------------------------------------ */
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/* This include file is always included by decSingle and decDouble, */
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/* and therefore also holds useful constants used by all three. */
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#if !defined(DECQUAD)
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#define DECQUAD
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#define DECQUADNAME "decimalQuad" /* Short name */
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#define DECQUADTITLE "Decimal 128-bit datum" /* Verbose name */
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#define DECQUADAUTHOR "Mike Cowlishaw" /* Who to blame */
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/* parameters for decQuads */
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#define DECQUAD_Bytes 16 /* length */
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#define DECQUAD_Pmax 34 /* maximum precision (digits) */
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#define DECQUAD_Emin -6143 /* minimum adjusted exponent */
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#define DECQUAD_Emax 6144 /* maximum adjusted exponent */
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#define DECQUAD_EmaxD 4 /* maximum exponent digits */
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#define DECQUAD_Bias 6176 /* bias for the exponent */
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#define DECQUAD_String 43 /* maximum string length, +1 */
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#define DECQUAD_EconL 12 /* exponent continuation length */
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#define DECQUAD_Declets 11 /* count of declets */
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/* highest biased exponent (Elimit-1) */
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#define DECQUAD_Ehigh (DECQUAD_Emax + DECQUAD_Bias - (DECQUAD_Pmax-1))
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/* Required include */
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#include "decContext.h"
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/* The decQuad decimal 128-bit type, accessible by all sizes */
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typedef union {
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uint8_t bytes[DECQUAD_Bytes]; /* fields: 1, 5, 12, 110 bits */
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uint16_t shorts[DECQUAD_Bytes/2];
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uint32_t words[DECQUAD_Bytes/4];
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#if DECUSE64
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uint64_t longs[DECQUAD_Bytes/8];
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#endif
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} decQuad;
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/* ---------------------------------------------------------------- */
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/* Shared constants */
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/* ---------------------------------------------------------------- */
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/* sign and special values [top 32-bits; last two bits are don't-care
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for Infinity on input, last bit don't-care for NaNs] */
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#define DECFLOAT_Sign 0x80000000 /* 1 00000 00 Sign */
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#define DECFLOAT_NaN 0x7c000000 /* 0 11111 00 NaN generic */
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#define DECFLOAT_qNaN 0x7c000000 /* 0 11111 00 qNaN */
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#define DECFLOAT_sNaN 0x7e000000 /* 0 11111 10 sNaN */
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#define DECFLOAT_Inf 0x78000000 /* 0 11110 00 Infinity */
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#define DECFLOAT_MinSp 0x78000000 /* minimum special value */
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/* [specials are all >=MinSp] */
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/* Sign nibble constants */
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#if !defined(DECPPLUSALT)
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#define DECPPLUSALT 0x0A /* alternate plus nibble */
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#define DECPMINUSALT 0x0B /* alternate minus nibble */
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#define DECPPLUS 0x0C /* preferred plus nibble */
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#define DECPMINUS 0x0D /* preferred minus nibble */
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#define DECPPLUSALT2 0x0E /* alternate plus nibble */
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#define DECPUNSIGNED 0x0F /* alternate plus nibble (unsigned) */
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#endif
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/* ---------------------------------------------------------------- */
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/* Routines -- implemented as decFloat routines in common files */
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/* ---------------------------------------------------------------- */
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/* Utilities and conversions, extractors, etc.) */
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extern decQuad * decQuadFromBCD(decQuad *, int32_t, const uint8_t *, int32_t);
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extern decQuad * decQuadFromInt32(decQuad *, int32_t);
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extern decQuad * decQuadFromPacked(decQuad *, int32_t, const uint8_t *);
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extern decQuad * decQuadFromPackedChecked(decQuad *, int32_t, const uint8_t *);
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extern decQuad * decQuadFromString(decQuad *, const char *, decContext *);
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extern decQuad * decQuadFromUInt32(decQuad *, uint32_t);
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extern int32_t decQuadGetCoefficient(const decQuad *, uint8_t *);
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extern int32_t decQuadGetExponent(const decQuad *);
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extern decQuad * decQuadSetCoefficient(decQuad *, const uint8_t *, int32_t);
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extern decQuad * decQuadSetExponent(decQuad *, decContext *, int32_t);
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extern void decQuadShow(const decQuad *, const char *);
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extern int32_t decQuadToBCD(const decQuad *, int32_t *, uint8_t *);
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extern char * decQuadToEngString(const decQuad *, char *);
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extern int32_t decQuadToInt32(const decQuad *, decContext *, enum rounding);
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extern int32_t decQuadToInt32Exact(const decQuad *, decContext *, enum rounding);
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extern int32_t decQuadToPacked(const decQuad *, int32_t *, uint8_t *);
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extern char * decQuadToString(const decQuad *, char *);
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extern uint32_t decQuadToUInt32(const decQuad *, decContext *, enum rounding);
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extern uint32_t decQuadToUInt32Exact(const decQuad *, decContext *, enum rounding);
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extern decQuad * decQuadZero(decQuad *);
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/* Computational (result is a decQuad) */
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extern decQuad * decQuadAbs(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadAdd(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadAnd(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadDivide(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadDivideInteger(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadFMA(decQuad *, const decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadInvert(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadLogB(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadMax(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadMaxMag(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadMin(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadMinMag(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadMinus(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadMultiply(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadNextMinus(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadNextPlus(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadNextToward(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadOr(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadPlus(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadQuantize(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadReduce(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadRemainder(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadRemainderNear(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadRotate(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadScaleB(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadShift(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadSubtract(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadToIntegralValue(decQuad *, const decQuad *, decContext *, enum rounding);
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extern decQuad * decQuadToIntegralExact(decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadXor(decQuad *, const decQuad *, const decQuad *, decContext *);
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/* Comparisons */
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extern decQuad * decQuadCompare(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadCompareSignal(decQuad *, const decQuad *, const decQuad *, decContext *);
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extern decQuad * decQuadCompareTotal(decQuad *, const decQuad *, const decQuad *);
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extern decQuad * decQuadCompareTotalMag(decQuad *, const decQuad *, const decQuad *);
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/* Copies */
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extern decQuad * decQuadCanonical(decQuad *, const decQuad *);
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extern decQuad * decQuadCopy(decQuad *, const decQuad *);
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extern decQuad * decQuadCopyAbs(decQuad *, const decQuad *);
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extern decQuad * decQuadCopyNegate(decQuad *, const decQuad *);
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extern decQuad * decQuadCopySign(decQuad *, const decQuad *, const decQuad *);
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/* Non-computational */
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extern enum decClass decQuadClass(const decQuad *);
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extern const char * decQuadClassString(const decQuad *);
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extern uint32_t decQuadDigits(const decQuad *);
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extern uint32_t decQuadIsCanonical(const decQuad *);
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extern uint32_t decQuadIsFinite(const decQuad *);
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extern uint32_t decQuadIsInteger(const decQuad *);
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extern uint32_t decQuadIsLogical(const decQuad *);
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extern uint32_t decQuadIsInfinite(const decQuad *);
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extern uint32_t decQuadIsNaN(const decQuad *);
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extern uint32_t decQuadIsNegative(const decQuad *);
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extern uint32_t decQuadIsNormal(const decQuad *);
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extern uint32_t decQuadIsPositive(const decQuad *);
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extern uint32_t decQuadIsSignaling(const decQuad *);
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extern uint32_t decQuadIsSignalling(const decQuad *);
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extern uint32_t decQuadIsSigned(const decQuad *);
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extern uint32_t decQuadIsSubnormal(const decQuad *);
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extern uint32_t decQuadIsZero(const decQuad *);
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extern uint32_t decQuadRadix(const decQuad *);
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extern uint32_t decQuadSameQuantum(const decQuad *, const decQuad *);
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extern const char * decQuadVersion(void);
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/* decNumber conversions; these are implemented as macros so as not */
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/* to force a dependency on decimal128 and decNumber in decQuad. */
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/* decQuadFromNumber returns a decimal128 * to avoid warnings. */
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#define decQuadToNumber(dq, dn) decimal128ToNumber((decimal128 *)(dq), dn)
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#define decQuadFromNumber(dq, dn, set) decimal128FromNumber((decimal128 *)(dq), dn, set)
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#endif
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