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167 lines
10 KiB
C
167 lines
10 KiB
C
/* decDouble module header for the decNumber C Library.
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Copyright (C) 2007 Free Software Foundation, Inc.
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Contributed by IBM Corporation. Author Mike Cowlishaw.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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In addition to the permissions in the GNU General Public License,
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the Free Software Foundation gives you unlimited permission to link
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the compiled version of this file into combinations with other
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programs, and to distribute those combinations without any
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restriction coming from the use of this file. (The General Public
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License restrictions do apply in other respects; for example, they
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cover modification of the file, and distribution when not linked
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into a combine executable.)
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* ------------------------------------------------------------------ */
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/* decDouble.h -- Decimal 64-bit format module header */
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/* ------------------------------------------------------------------ */
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/* Please see decFloats.h for an overview and documentation details. */
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/* ------------------------------------------------------------------ */
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#if !defined(DECDOUBLE)
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#define DECDOUBLE
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#define DECDOUBLENAME "decimalDouble" /* Short name */
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#define DECDOUBLETITLE "Decimal 64-bit datum" /* Verbose name */
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#define DECDOUBLEAUTHOR "Mike Cowlishaw" /* Who to blame */
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/* parameters for decDoubles */
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#define DECDOUBLE_Bytes 8 /* length */
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#define DECDOUBLE_Pmax 16 /* maximum precision (digits) */
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#define DECDOUBLE_Emin -383 /* minimum adjusted exponent */
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#define DECDOUBLE_Emax 384 /* maximum adjusted exponent */
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#define DECDOUBLE_EmaxD 3 /* maximum exponent digits */
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#define DECDOUBLE_Bias 398 /* bias for the exponent */
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#define DECDOUBLE_String 25 /* maximum string length, +1 */
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#define DECDOUBLE_EconL 8 /* exponent continuation length */
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#define DECDOUBLE_Declets 5 /* count of declets */
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/* highest biased exponent (Elimit-1) */
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#define DECDOUBLE_Ehigh (DECDOUBLE_Emax + DECDOUBLE_Bias - (DECDOUBLE_Pmax-1))
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/* Required includes */
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#include "decContext.h"
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#include "decQuad.h"
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/* The decDouble decimal 64-bit type, accessible by various types */
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typedef union {
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uint8_t bytes[DECDOUBLE_Bytes]; /* fields: 1, 5, 8, 50 bits */
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uint16_t shorts[DECDOUBLE_Bytes/2];
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uint32_t words[DECDOUBLE_Bytes/4];
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} decDouble;
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/* ---------------------------------------------------------------- */
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/* Routines -- implemented as decFloat routines in common files */
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/* ---------------------------------------------------------------- */
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#include "decDoubleSymbols.h"
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/* Utilities and conversions, extractors, etc.) */
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extern decDouble * decDoubleFromBCD(decDouble *, int32_t, const uint8_t *, int32_t);
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extern decDouble * decDoubleFromInt32(decDouble *, int32_t);
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extern decDouble * decDoubleFromPacked(decDouble *, int32_t, const uint8_t *);
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extern decDouble * decDoubleFromString(decDouble *, const char *, decContext *);
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extern decDouble * decDoubleFromUInt32(decDouble *, uint32_t);
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extern decDouble * decDoubleFromWider(decDouble *, const decQuad *, decContext *);
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extern int32_t decDoubleGetCoefficient(const decDouble *, uint8_t *);
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extern int32_t decDoubleGetExponent(const decDouble *);
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extern decDouble * decDoubleSetCoefficient(decDouble *, const uint8_t *, int32_t);
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extern decDouble * decDoubleSetExponent(decDouble *, decContext *, int32_t);
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extern void decDoubleShow(const decDouble *, const char *);
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extern int32_t decDoubleToBCD(const decDouble *, int32_t *, uint8_t *);
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extern char * decDoubleToEngString(const decDouble *, char *);
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extern int32_t decDoubleToInt32(const decDouble *, decContext *, enum rounding);
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extern int32_t decDoubleToInt32Exact(const decDouble *, decContext *, enum rounding);
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extern int32_t decDoubleToPacked(const decDouble *, int32_t *, uint8_t *);
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extern char * decDoubleToString(const decDouble *, char *);
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extern uint32_t decDoubleToUInt32(const decDouble *, decContext *, enum rounding);
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extern uint32_t decDoubleToUInt32Exact(const decDouble *, decContext *, enum rounding);
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extern decQuad * decDoubleToWider(const decDouble *, decQuad *);
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extern decDouble * decDoubleZero(decDouble *);
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/* Computational (result is a decDouble) */
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extern decDouble * decDoubleAbs(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleAdd(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleAnd(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleDivide(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleDivideInteger(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleFMA(decDouble *, const decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleInvert(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleLogB(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleMax(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleMaxMag(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleMin(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleMinMag(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleMinus(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleMultiply(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleNextMinus(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleNextPlus(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleNextToward(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleOr(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoublePlus(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleQuantize(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleReduce(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleRemainder(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleRemainderNear(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleRotate(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleScaleB(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleShift(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleSubtract(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleToIntegralValue(decDouble *, const decDouble *, decContext *, enum rounding);
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extern decDouble * decDoubleToIntegralExact(decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleXor(decDouble *, const decDouble *, const decDouble *, decContext *);
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/* Comparisons */
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extern decDouble * decDoubleCompare(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleCompareSignal(decDouble *, const decDouble *, const decDouble *, decContext *);
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extern decDouble * decDoubleCompareTotal(decDouble *, const decDouble *, const decDouble *);
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extern decDouble * decDoubleCompareTotalMag(decDouble *, const decDouble *, const decDouble *);
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/* Copies */
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extern decDouble * decDoubleCanonical(decDouble *, const decDouble *);
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extern decDouble * decDoubleCopy(decDouble *, const decDouble *);
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extern decDouble * decDoubleCopyAbs(decDouble *, const decDouble *);
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extern decDouble * decDoubleCopyNegate(decDouble *, const decDouble *);
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extern decDouble * decDoubleCopySign(decDouble *, const decDouble *, const decDouble *);
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/* Non-computational */
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extern enum decClass decDoubleClass(const decDouble *);
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extern const char * decDoubleClassString(const decDouble *);
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extern uint32_t decDoubleDigits(const decDouble *);
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extern uint32_t decDoubleIsCanonical(const decDouble *);
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extern uint32_t decDoubleIsFinite(const decDouble *);
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extern uint32_t decDoubleIsInfinite(const decDouble *);
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extern uint32_t decDoubleIsInteger(const decDouble *);
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extern uint32_t decDoubleIsNaN(const decDouble *);
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extern uint32_t decDoubleIsNormal(const decDouble *);
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extern uint32_t decDoubleIsSignaling(const decDouble *);
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extern uint32_t decDoubleIsSignalling(const decDouble *);
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extern uint32_t decDoubleIsSigned(const decDouble *);
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extern uint32_t decDoubleIsSubnormal(const decDouble *);
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extern uint32_t decDoubleIsZero(const decDouble *);
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extern uint32_t decDoubleRadix(const decDouble *);
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extern uint32_t decDoubleSameQuantum(const decDouble *, const decDouble *);
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extern const char * decDoubleVersion(void);
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/* decNumber conversions; these are implemented as macros so as not */
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/* to force a dependency on decimal64 and decNumber in decDouble. */
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#define decDoubleToNumber(dq, dn) decimal64ToNumber((decimal64 *)(dq), dn)
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#define decDoubleFromNumber(dq, dn, set) (decDouble *)decimal64FromNumber((decimal64 *)(dq), dn, set)
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#endif
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