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提交 72ac97cd 编写于 作者: T Tom Musta 提交者： Alexander Graf
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libdecnumber: Introduce libdecnumber Code 

Add files from the libdecnumber decimal floating point library to QEMU.  The libdecnumber
library was originally part of GCC and contains code that is useful in emulating the PowerPC
decimal floating point (DFP) instructions.  This particular copy of the source comes from
GCC 4.3 and is licensed at GPLv2+.
Signed-off-by: NTom Musta <tommusta@gmail.com>
Signed-off-by: NAlexander Graf <agraf@suse.de>
上级 9d1c1283
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include/libdecnumber/dconfig.h 0 → 100644
浏览文件 @ 72ac97cd
/* Configure decNumber for either host or target.
Copyright (C) 2008 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#ifdef IN_LIBGCC2
#include "tconfig.h"
#include "coretypes.h"
#include "tm.h"
#ifndef LIBGCC2_WORDS_BIG_ENDIAN
#define LIBGCC2_WORDS_BIG_ENDIAN WORDS_BIG_ENDIAN
#endif
#ifndef LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
#define LIBGCC2_FLOAT_WORDS_BIG_ENDIAN LIBGCC2_WORDS_BIG_ENDIAN
#endif
#if LIBGCC2_FLOAT_WORDS_BIG_ENDIAN
#define WORDS_BIGENDIAN 1
#endif
#else
#include "config.h"
#endif
include/libdecnumber/decContext.h 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal context header module for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal Context module header */
/* ------------------------------------------------------------------ */
/* */
/* Context variables must always have valid values: */
/* */
/* status -- [any bits may be cleared, but not set, by user] */
/* round -- must be one of the enumerated rounding modes */
/* */
/* The following variables are implied for fixed size formats (i.e., */
/* they are ignored) but should still be set correctly in case used */
/* with decNumber functions: */
/* */
/* clamp -- must be either 0 or 1 */
/* digits -- must be in the range 1 through 999999999 */
/* emax -- must be in the range 0 through 999999999 */
/* emin -- must be in the range 0 through -999999999 */
/* extended -- must be either 0 or 1 [present only if DECSUBSET] */
/* traps -- only defined bits may be set */
/* */
/* ------------------------------------------------------------------ */
#if !defined(DECCONTEXT)
#define DECCONTEXT
#define DECCNAME "decContext" /* Short name */
#define DECCFULLNAME "Decimal Context Descriptor" /* Verbose name */
#define DECCAUTHOR "Mike Cowlishaw" /* Who to blame */
#include "gstdint.h" /* C99 standard integers */
#include <stdio.h> /* for printf, etc. */
#include <signal.h> /* for traps */
/* Extended flags setting -- set this to 0 to use only IEEE flags */
#define DECEXTFLAG 1 /* 1=enable extended flags */
/* Conditional code flag -- set this to 0 for best performance */
#define DECSUBSET 0 /* 1=enable subset arithmetic */
/* Context for operations, with associated constants */
enum rounding {
DEC_ROUND_CEILING, /* round towards +infinity */
DEC_ROUND_UP, /* round away from 0 */
DEC_ROUND_HALF_UP, /* 0.5 rounds up */
DEC_ROUND_HALF_EVEN, /* 0.5 rounds to nearest even */
DEC_ROUND_HALF_DOWN, /* 0.5 rounds down */
DEC_ROUND_DOWN, /* round towards 0 (truncate) */
DEC_ROUND_FLOOR, /* round towards -infinity */
DEC_ROUND_05UP, /* round for reround */
DEC_ROUND_MAX /* enum must be less than this */
};
#define DEC_ROUND_DEFAULT DEC_ROUND_HALF_EVEN;
typedef struct {
int32_t digits; /* working precision */
int32_t emax; /* maximum positive exponent */
int32_t emin; /* minimum negative exponent */
enum rounding round; /* rounding mode */
uint32_t traps; /* trap-enabler flags */
uint32_t status; /* status flags */
uint8_t clamp; /* flag: apply IEEE exponent clamp */
#if DECSUBSET
uint8_t extended; /* flag: special-values allowed */
#endif
} decContext;
/* Maxima and Minima for context settings */
#define DEC_MAX_DIGITS 999999999
#define DEC_MIN_DIGITS 1
#define DEC_MAX_EMAX 999999999
#define DEC_MIN_EMAX 0
#define DEC_MAX_EMIN 0
#define DEC_MIN_EMIN -999999999
#define DEC_MAX_MATH 999999 /* max emax, etc., for math funcs. */
/* Classifications for decimal numbers, aligned with 754r (note */
/* that 'normal' and 'subnormal' are meaningful only with a */
/* decContext or a fixed size format). */
enum decClass {
DEC_CLASS_SNAN,
DEC_CLASS_QNAN,
DEC_CLASS_NEG_INF,
DEC_CLASS_NEG_NORMAL,
DEC_CLASS_NEG_SUBNORMAL,
DEC_CLASS_NEG_ZERO,
DEC_CLASS_POS_ZERO,
DEC_CLASS_POS_SUBNORMAL,
DEC_CLASS_POS_NORMAL,
DEC_CLASS_POS_INF
};
/* Strings for the decClasses */
#define DEC_ClassString_SN "sNaN"
#define DEC_ClassString_QN "NaN"
#define DEC_ClassString_NI "-Infinity"
#define DEC_ClassString_NN "-Normal"
#define DEC_ClassString_NS "-Subnormal"
#define DEC_ClassString_NZ "-Zero"
#define DEC_ClassString_PZ "+Zero"
#define DEC_ClassString_PS "+Subnormal"
#define DEC_ClassString_PN "+Normal"
#define DEC_ClassString_PI "+Infinity"
#define DEC_ClassString_UN "Invalid"
/* Trap-enabler and Status flags (exceptional conditions), and */
/* their names. The top byte is reserved for internal use */
#if DECEXTFLAG
/* Extended flags */
#define DEC_Conversion_syntax 0x00000001
#define DEC_Division_by_zero 0x00000002
#define DEC_Division_impossible 0x00000004
#define DEC_Division_undefined 0x00000008
#define DEC_Insufficient_storage 0x00000010 /* [when malloc fails] */
#define DEC_Inexact 0x00000020
#define DEC_Invalid_context 0x00000040
#define DEC_Invalid_operation 0x00000080
#if DECSUBSET
#define DEC_Lost_digits 0x00000100
#endif
#define DEC_Overflow 0x00000200
#define DEC_Clamped 0x00000400
#define DEC_Rounded 0x00000800
#define DEC_Subnormal 0x00001000
#define DEC_Underflow 0x00002000
#else
/* IEEE flags only */
#define DEC_Conversion_syntax 0x00000010
#define DEC_Division_by_zero 0x00000002
#define DEC_Division_impossible 0x00000010
#define DEC_Division_undefined 0x00000010
#define DEC_Insufficient_storage 0x00000010 /* [when malloc fails] */
#define DEC_Inexact 0x00000001
#define DEC_Invalid_context 0x00000010
#define DEC_Invalid_operation 0x00000010
#if DECSUBSET
#define DEC_Lost_digits 0x00000000
#endif
#define DEC_Overflow 0x00000008
#define DEC_Clamped 0x00000000
#define DEC_Rounded 0x00000000
#define DEC_Subnormal 0x00000000
#define DEC_Underflow 0x00000004
#endif
/* IEEE 854 groupings for the flags */
/* [DEC_Clamped, DEC_Lost_digits, DEC_Rounded, and DEC_Subnormal */
/* are not in IEEE 854] */
#define DEC_IEEE_854_Division_by_zero (DEC_Division_by_zero)
#if DECSUBSET
#define DEC_IEEE_854_Inexact (DEC_Inexact | DEC_Lost_digits)
#else
#define DEC_IEEE_854_Inexact (DEC_Inexact)
#endif
#define DEC_IEEE_854_Invalid_operation (DEC_Conversion_syntax | \
DEC_Division_impossible | \
DEC_Division_undefined | \
DEC_Insufficient_storage | \
DEC_Invalid_context | \
DEC_Invalid_operation)
#define DEC_IEEE_854_Overflow (DEC_Overflow)
#define DEC_IEEE_854_Underflow (DEC_Underflow)
/* flags which are normally errors (result is qNaN, infinite, or 0) */
#define DEC_Errors (DEC_IEEE_854_Division_by_zero | \
DEC_IEEE_854_Invalid_operation | \
DEC_IEEE_854_Overflow | DEC_IEEE_854_Underflow)
/* flags which cause a result to become qNaN */
#define DEC_NaNs DEC_IEEE_854_Invalid_operation
/* flags which are normally for information only (finite results) */
#if DECSUBSET
#define DEC_Information (DEC_Clamped | DEC_Rounded | DEC_Inexact \
| DEC_Lost_digits)
#else
#define DEC_Information (DEC_Clamped | DEC_Rounded | DEC_Inexact)
#endif
/* Name strings for the exceptional conditions */
#define DEC_Condition_CS "Conversion syntax"
#define DEC_Condition_DZ "Division by zero"
#define DEC_Condition_DI "Division impossible"
#define DEC_Condition_DU "Division undefined"
#define DEC_Condition_IE "Inexact"
#define DEC_Condition_IS "Insufficient storage"
#define DEC_Condition_IC "Invalid context"
#define DEC_Condition_IO "Invalid operation"
#if DECSUBSET
#define DEC_Condition_LD "Lost digits"
#endif
#define DEC_Condition_OV "Overflow"
#define DEC_Condition_PA "Clamped"
#define DEC_Condition_RO "Rounded"
#define DEC_Condition_SU "Subnormal"
#define DEC_Condition_UN "Underflow"
#define DEC_Condition_ZE "No status"
#define DEC_Condition_MU "Multiple status"
#define DEC_Condition_Length 21 /* length of the longest string, */
/* including terminator */
/* Initialization descriptors, used by decContextDefault */
#define DEC_INIT_BASE 0
#define DEC_INIT_DECIMAL32 32
#define DEC_INIT_DECIMAL64 64
#define DEC_INIT_DECIMAL128 128
/* Synonyms */
#define DEC_INIT_DECSINGLE DEC_INIT_DECIMAL32
#define DEC_INIT_DECDOUBLE DEC_INIT_DECIMAL64
#define DEC_INIT_DECQUAD DEC_INIT_DECIMAL128
/* decContext routines */
#include "decContextSymbols.h"
extern decContext * decContextClearStatus(decContext *, uint32_t);
extern decContext * decContextDefault(decContext *, int32_t);
extern enum rounding decContextGetRounding(decContext *);
extern uint32_t decContextGetStatus(decContext *);
extern decContext * decContextRestoreStatus(decContext *, uint32_t, uint32_t);
extern uint32_t decContextSaveStatus(decContext *, uint32_t);
extern decContext * decContextSetRounding(decContext *, enum rounding);
extern decContext * decContextSetStatus(decContext *, uint32_t);
extern decContext * decContextSetStatusFromString(decContext *, const char *);
extern decContext * decContextSetStatusFromStringQuiet(decContext *, const char *);
extern decContext * decContextSetStatusQuiet(decContext *, uint32_t);
extern const char * decContextStatusToString(const decContext *);
extern uint32_t decContextTestSavedStatus(uint32_t, uint32_t);
extern uint32_t decContextTestStatus(decContext *, uint32_t);
extern decContext * decContextZeroStatus(decContext *);
#endif
include/libdecnumber/decDPD.h 0 → 100644
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include/libdecnumber/decNumber.h 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal number arithmetic module header for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal Number arithmetic module header */
/* ------------------------------------------------------------------ */
#if !defined(DECNUMBER)
#define DECNUMBER
#define DECNAME "decNumber" /* Short name */
#define DECFULLNAME "Decimal Number Module" /* Verbose name */
#define DECAUTHOR "Mike Cowlishaw" /* Who to blame */
#if !defined(DECCONTEXT)
#include "decContext.h"
#endif
/* Bit settings for decNumber.bits */
#define DECNEG 0x80 /* Sign; 1=negative, 0=positive or zero */
#define DECINF 0x40 /* 1=Infinity */
#define DECNAN 0x20 /* 1=NaN */
#define DECSNAN 0x10 /* 1=sNaN */
/* The remaining bits are reserved; they must be 0 */
#define DECSPECIAL (DECINF|DECNAN|DECSNAN) /* any special value */
/* Define the decNumber data structure. The size and shape of the */
/* units array in the structure is determined by the following */
/* constant. This must not be changed without recompiling the */
/* decNumber library modules. */
#define DECDPUN 3 /* DECimal Digits Per UNit [must be >0 */
/* and <10; 3 or powers of 2 are best]. */
/* DECNUMDIGITS is the default number of digits that can be held in */
/* the structure. If undefined, 1 is assumed and it is assumed */
/* that the structure will be immediately followed by extra space, */
/* as required. DECNUMDIGITS is always >0. */
#if !defined(DECNUMDIGITS)
#define DECNUMDIGITS 1
#endif
/* The size (integer data type) of each unit is determined by the */
/* number of digits it will hold. */
#if DECDPUN<=2
#define decNumberUnit uint8_t
#elif DECDPUN<=4
#define decNumberUnit uint16_t
#else
#define decNumberUnit uint32_t
#endif
/* The number of units needed is ceil(DECNUMDIGITS/DECDPUN) */
#define DECNUMUNITS ((DECNUMDIGITS+DECDPUN-1)/DECDPUN)
/* The data structure... */
typedef struct {
int32_t digits; /* Count of digits in the coefficient; >0 */
int32_t exponent; /* Unadjusted exponent, unbiased, in */
/* range: -1999999997 through 999999999 */
uint8_t bits; /* Indicator bits (see above) */
/* Coefficient, from least significant unit */
decNumberUnit lsu[DECNUMUNITS];
} decNumber;
/* Notes: */
/* 1. If digits is > DECDPUN then there will one or more */
/* decNumberUnits immediately following the first element of lsu.*/
/* These contain the remaining (more significant) digits of the */
/* number, and may be in the lsu array, or may be guaranteed by */
/* some other mechanism (such as being contained in another */
/* structure, or being overlaid on dynamically allocated */
/* storage). */
/* */
/* Each integer of the coefficient (except potentially the last) */
/* contains DECDPUN digits (e.g., a value in the range 0 through */
/* 99999999 if DECDPUN is 8, or 0 through 999 if DECDPUN is 3). */
/* */
/* 2. A decNumber converted to a string may need up to digits+14 */
/* characters. The worst cases (non-exponential and exponential */
/* formats) are -0.00000{9...}# and -9.{9...}E+999999999# */
/* (where # is '\0') */
/* ---------------------------------------------------------------- */
/* decNumber public functions and macros */
/* ---------------------------------------------------------------- */
#include "decNumberSymbols.h"
/* Conversions */
decNumber * decNumberFromInt32(decNumber *, int32_t);
decNumber * decNumberFromUInt32(decNumber *, uint32_t);
decNumber * decNumberFromString(decNumber *, const char *, decContext *);
char * decNumberToString(const decNumber *, char *);
char * decNumberToEngString(const decNumber *, char *);
uint32_t decNumberToUInt32(const decNumber *, decContext *);
int32_t decNumberToInt32(const decNumber *, decContext *);
uint8_t * decNumberGetBCD(const decNumber *, uint8_t *);
decNumber * decNumberSetBCD(decNumber *, const uint8_t *, uint32_t);
/* Operators and elementary functions */
decNumber * decNumberAbs(decNumber *, const decNumber *, decContext *);
decNumber * decNumberAdd(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberAnd(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberCompare(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberCompareSignal(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberCompareTotal(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberCompareTotalMag(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberDivide(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberDivideInteger(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberExp(decNumber *, const decNumber *, decContext *);
decNumber * decNumberFMA(decNumber *, const decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberInvert(decNumber *, const decNumber *, decContext *);
decNumber * decNumberLn(decNumber *, const decNumber *, decContext *);
decNumber * decNumberLogB(decNumber *, const decNumber *, decContext *);
decNumber * decNumberLog10(decNumber *, const decNumber *, decContext *);
decNumber * decNumberMax(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberMaxMag(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberMin(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberMinMag(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberMinus(decNumber *, const decNumber *, decContext *);
decNumber * decNumberMultiply(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberNormalize(decNumber *, const decNumber *, decContext *);
decNumber * decNumberOr(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberPlus(decNumber *, const decNumber *, decContext *);
decNumber * decNumberPower(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberQuantize(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberReduce(decNumber *, const decNumber *, decContext *);
decNumber * decNumberRemainder(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberRemainderNear(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberRescale(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberRotate(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberSameQuantum(decNumber *, const decNumber *, const decNumber *);
decNumber * decNumberScaleB(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberShift(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberSquareRoot(decNumber *, const decNumber *, decContext *);
decNumber * decNumberSubtract(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberToIntegralExact(decNumber *, const decNumber *, decContext *);
decNumber * decNumberToIntegralValue(decNumber *, const decNumber *, decContext *);
decNumber * decNumberXor(decNumber *, const decNumber *, const decNumber *, decContext *);
/* Utilities */
enum decClass decNumberClass(const decNumber *, decContext *);
const char * decNumberClassToString(enum decClass);
decNumber * decNumberCopy(decNumber *, const decNumber *);
decNumber * decNumberCopyAbs(decNumber *, const decNumber *);
decNumber * decNumberCopyNegate(decNumber *, const decNumber *);
decNumber * decNumberCopySign(decNumber *, const decNumber *, const decNumber *);
decNumber * decNumberNextMinus(decNumber *, const decNumber *, decContext *);
decNumber * decNumberNextPlus(decNumber *, const decNumber *, decContext *);
decNumber * decNumberNextToward(decNumber *, const decNumber *, const decNumber *, decContext *);
decNumber * decNumberTrim(decNumber *);
const char * decNumberVersion(void);
decNumber * decNumberZero(decNumber *);
/* Functions for testing decNumbers (normality depends on context) */
int32_t decNumberIsNormal(const decNumber *, decContext *);
int32_t decNumberIsSubnormal(const decNumber *, decContext *);
/* Macros for testing decNumber *dn */
#define decNumberIsCanonical(dn) (1) /* All decNumbers are saintly */
#define decNumberIsFinite(dn) (((dn)->bits&DECSPECIAL)==0)
#define decNumberIsInfinite(dn) (((dn)->bits&DECINF)!=0)
#define decNumberIsNaN(dn) (((dn)->bits&(DECNAN|DECSNAN))!=0)
#define decNumberIsNegative(dn) (((dn)->bits&DECNEG)!=0)
#define decNumberIsQNaN(dn) (((dn)->bits&(DECNAN))!=0)
#define decNumberIsSNaN(dn) (((dn)->bits&(DECSNAN))!=0)
#define decNumberIsSpecial(dn) (((dn)->bits&DECSPECIAL)!=0)
#define decNumberIsZero(dn) (*(dn)->lsu==0 \
&& (dn)->digits==1 \
&& (((dn)->bits&DECSPECIAL)==0))
#define decNumberRadix(dn) (10)
#endif
include/libdecnumber/decNumberLocal.h 0 → 100644
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include/libdecnumber/dpd/decimal128.h 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal 128-bit format module header for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal 128-bit format module header */
/* ------------------------------------------------------------------ */
#if !defined(DECIMAL128)
#define DECIMAL128
#define DEC128NAME "decimal128" /* Short name */
#define DEC128FULLNAME "Decimal 128-bit Number" /* Verbose name */
#define DEC128AUTHOR "Mike Cowlishaw" /* Who to blame */
/* parameters for decimal128s */
#define DECIMAL128_Bytes 16 /* length */
#define DECIMAL128_Pmax 34 /* maximum precision (digits) */
#define DECIMAL128_Emax 6144 /* maximum adjusted exponent */
#define DECIMAL128_Emin -6143 /* minimum adjusted exponent */
#define DECIMAL128_Bias 6176 /* bias for the exponent */
#define DECIMAL128_String 43 /* maximum string length, +1 */
#define DECIMAL128_EconL 12 /* exp. continuation length */
/* highest biased exponent (Elimit-1) */
#define DECIMAL128_Ehigh (DECIMAL128_Emax+DECIMAL128_Bias-DECIMAL128_Pmax+1)
/* check enough digits, if pre-defined */
#if defined(DECNUMDIGITS)
#if (DECNUMDIGITS<DECIMAL128_Pmax)
#error decimal128.h needs pre-defined DECNUMDIGITS>=34 for safe use
#endif
#endif
#ifndef DECNUMDIGITS
#define DECNUMDIGITS DECIMAL128_Pmax /* size if not already defined*/
#endif
#ifndef DECNUMBER
#include "decNumber.h" /* context and number library */
#endif
/* Decimal 128-bit type, accessible by bytes */
typedef struct {
uint8_t bytes[DECIMAL128_Bytes]; /* decimal128: 1, 5, 12, 110 bits*/
} decimal128;
/* special values [top byte excluding sign bit; last two bits are */
/* don't-care for Infinity on input, last bit don't-care for NaN] */
#if !defined(DECIMAL_NaN)
#define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */
#define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */
#define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */
#endif
#include "decimal128Local.h"
/* ---------------------------------------------------------------- */
/* Routines */
/* ---------------------------------------------------------------- */
#include "decimal128Symbols.h"
/* String conversions */
decimal128 * decimal128FromString(decimal128 *, const char *, decContext *);
char * decimal128ToString(const decimal128 *, char *);
char * decimal128ToEngString(const decimal128 *, char *);
/* decNumber conversions */
decimal128 * decimal128FromNumber(decimal128 *, const decNumber *,
decContext *);
decNumber * decimal128ToNumber(const decimal128 *, decNumber *);
/* Format-dependent utilities */
uint32_t decimal128IsCanonical(const decimal128 *);
decimal128 * decimal128Canonical(decimal128 *, const decimal128 *);
#endif
include/libdecnumber/dpd/decimal128Local.h 0 → 100644
浏览文件 @ 72ac97cd
/* Local definitions for use with the decNumber C Library.
Copyright (C) 2007 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
#if !defined(DECIMAL128LOCAL)
/* The compiler needs sign manipulation functions for decimal128 which
are not part of the decNumber package. */
/* Set sign; this assumes the sign was previously zero. */
#define decimal128SetSign(d,b) \
{ (d)->bytes[WORDS_BIGENDIAN ? 0 : 15] |= ((unsigned) (b) << 7); }
/* Clear sign. */
#define decimal128ClearSign(d) \
{ (d)->bytes[WORDS_BIGENDIAN ? 0 : 15] &= ~0x80; }
/* Flip sign. */
#define decimal128FlipSign(d) \
{ (d)->bytes[WORDS_BIGENDIAN ? 0 : 15] ^= 0x80; }
#endif
include/libdecnumber/dpd/decimal32.h 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal 32-bit format module header for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal 32-bit format module header */
/* ------------------------------------------------------------------ */
#if !defined(DECIMAL32)
#define DECIMAL32
#define DEC32NAME "decimal32" /* Short name */
#define DEC32FULLNAME "Decimal 32-bit Number" /* Verbose name */
#define DEC32AUTHOR "Mike Cowlishaw" /* Who to blame */
/* parameters for decimal32s */
#define DECIMAL32_Bytes 4 /* length */
#define DECIMAL32_Pmax 7 /* maximum precision (digits) */
#define DECIMAL32_Emax 96 /* maximum adjusted exponent */
#define DECIMAL32_Emin -95 /* minimum adjusted exponent */
#define DECIMAL32_Bias 101 /* bias for the exponent */
#define DECIMAL32_String 15 /* maximum string length, +1 */
#define DECIMAL32_EconL 6 /* exp. continuation length */
/* highest biased exponent (Elimit-1) */
#define DECIMAL32_Ehigh (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1)
/* check enough digits, if pre-defined */
#if defined(DECNUMDIGITS)
#if (DECNUMDIGITS<DECIMAL32_Pmax)
#error decimal32.h needs pre-defined DECNUMDIGITS>=7 for safe use
#endif
#endif
#ifndef DECNUMDIGITS
#define DECNUMDIGITS DECIMAL32_Pmax /* size if not already defined*/
#endif
#ifndef DECNUMBER
#include "decNumber.h" /* context and number library */
#endif
/* Decimal 32-bit type, accessible by bytes */
typedef struct {
uint8_t bytes[DECIMAL32_Bytes]; /* decimal32: 1, 5, 6, 20 bits*/
} decimal32;
/* special values [top byte excluding sign bit; last two bits are */
/* don't-care for Infinity on input, last bit don't-care for NaN] */
#if !defined(DECIMAL_NaN)
#define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */
#define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */
#define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */
#endif
/* ---------------------------------------------------------------- */
/* Routines */
/* ---------------------------------------------------------------- */
#include "decimal32Symbols.h"
/* String conversions */
decimal32 * decimal32FromString(decimal32 *, const char *, decContext *);
char * decimal32ToString(const decimal32 *, char *);
char * decimal32ToEngString(const decimal32 *, char *);
/* decNumber conversions */
decimal32 * decimal32FromNumber(decimal32 *, const decNumber *,
decContext *);
decNumber * decimal32ToNumber(const decimal32 *, decNumber *);
/* Format-dependent utilities */
uint32_t decimal32IsCanonical(const decimal32 *);
decimal32 * decimal32Canonical(decimal32 *, const decimal32 *);
#endif
include/libdecnumber/dpd/decimal64.h 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal 64-bit format module header for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal 64-bit format module header */
/* ------------------------------------------------------------------ */
#if !defined(DECIMAL64)
#define DECIMAL64
#define DEC64NAME "decimal64" /* Short name */
#define DEC64FULLNAME "Decimal 64-bit Number" /* Verbose name */
#define DEC64AUTHOR "Mike Cowlishaw" /* Who to blame */
/* parameters for decimal64s */
#define DECIMAL64_Bytes 8 /* length */
#define DECIMAL64_Pmax 16 /* maximum precision (digits) */
#define DECIMAL64_Emax 384 /* maximum adjusted exponent */
#define DECIMAL64_Emin -383 /* minimum adjusted exponent */
#define DECIMAL64_Bias 398 /* bias for the exponent */
#define DECIMAL64_String 24 /* maximum string length, +1 */
#define DECIMAL64_EconL 8 /* exp. continuation length */
/* highest biased exponent (Elimit-1) */
#define DECIMAL64_Ehigh (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1)
/* check enough digits, if pre-defined */
#if defined(DECNUMDIGITS)
#if (DECNUMDIGITS<DECIMAL64_Pmax)
#error decimal64.h needs pre-defined DECNUMDIGITS>=16 for safe use
#endif
#endif
#ifndef DECNUMDIGITS
#define DECNUMDIGITS DECIMAL64_Pmax /* size if not already defined*/
#endif
#ifndef DECNUMBER
#include "decNumber.h" /* context and number library */
#endif
/* Decimal 64-bit type, accessible by bytes */
typedef struct {
uint8_t bytes[DECIMAL64_Bytes]; /* decimal64: 1, 5, 8, 50 bits*/
} decimal64;
/* special values [top byte excluding sign bit; last two bits are */
/* don't-care for Infinity on input, last bit don't-care for NaN] */
#if !defined(DECIMAL_NaN)
#define DECIMAL_NaN 0x7c /* 0 11111 00 NaN */
#define DECIMAL_sNaN 0x7e /* 0 11111 10 sNaN */
#define DECIMAL_Inf 0x78 /* 0 11110 00 Infinity */
#endif
/* ---------------------------------------------------------------- */
/* Routines */
/* ---------------------------------------------------------------- */
#include "decimal64Symbols.h"
/* String conversions */
decimal64 * decimal64FromString(decimal64 *, const char *, decContext *);
char * decimal64ToString(const decimal64 *, char *);
char * decimal64ToEngString(const decimal64 *, char *);
/* decNumber conversions */
decimal64 * decimal64FromNumber(decimal64 *, const decNumber *,
decContext *);
decNumber * decimal64ToNumber(const decimal64 *, decNumber *);
/* Format-dependent utilities */
uint32_t decimal64IsCanonical(const decimal64 *);
decimal64 * decimal64Canonical(decimal64 *, const decimal64 *);
#endif
libdecnumber/decContext.c 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal context module for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal Context module */
/* ------------------------------------------------------------------ */
/* This module comprises the routines for handling arithmetic */
/* context structures. */
/* ------------------------------------------------------------------ */
#include <string.h> /* for strcmp */
#include <stdio.h> /* for printf if DECCHECK */
#include "dconfig.h" /* for GCC definitions */
#include "decContext.h" /* context and base types */
#include "decNumberLocal.h" /* decNumber local types, etc. */
#if DECCHECK
/* compile-time endian tester [assumes sizeof(Int)>1] */
static const Int mfcone=1; /* constant 1 */
static const Flag *mfctop=(Flag *)&mfcone; /* -> top byte */
#define LITEND *mfctop /* named flag; 1=little-endian */
#endif
/* ------------------------------------------------------------------ */
/* round-for-reround digits */
/* ------------------------------------------------------------------ */
const uByte DECSTICKYTAB[10]={1,1,2,3,4,6,6,7,8,9}; /* used if sticky */
/* ------------------------------------------------------------------ */
/* Powers of ten (powers[n]==10**n, 0<=n<=9) */
/* ------------------------------------------------------------------ */
const uInt DECPOWERS[10]={1, 10, 100, 1000, 10000, 100000, 1000000,
10000000, 100000000, 1000000000};
/* ------------------------------------------------------------------ */
/* decContextClearStatus -- clear bits in current status */
/* */
/* context is the context structure to be queried */
/* mask indicates the bits to be cleared (the status bit that */
/* corresponds to each 1 bit in the mask is cleared) */
/* returns context */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decContext *decContextClearStatus(decContext *context, uInt mask) {
context->status&=~mask;
return context;
} /* decContextClearStatus */
/* ------------------------------------------------------------------ */
/* decContextDefault -- initialize a context structure */
/* */
/* context is the structure to be initialized */
/* kind selects the required set of default values, one of: */
/* DEC_INIT_BASE -- select ANSI X3-274 defaults */
/* DEC_INIT_DECIMAL32 -- select IEEE 754r defaults, 32-bit */
/* DEC_INIT_DECIMAL64 -- select IEEE 754r defaults, 64-bit */
/* DEC_INIT_DECIMAL128 -- select IEEE 754r defaults, 128-bit */
/* For any other value a valid context is returned, but with */
/* Invalid_operation set in the status field. */
/* returns a context structure with the appropriate initial values. */
/* ------------------------------------------------------------------ */
decContext * decContextDefault(decContext *context, Int kind) {
/* set defaults... */
context->digits=9; /* 9 digits */
context->emax=DEC_MAX_EMAX; /* 9-digit exponents */
context->emin=DEC_MIN_EMIN; /* .. balanced */
context->round=DEC_ROUND_HALF_UP; /* 0.5 rises */
context->traps=DEC_Errors; /* all but informational */
context->status=0; /* cleared */
context->clamp=0; /* no clamping */
#if DECSUBSET
context->extended=0; /* cleared */
#endif
switch (kind) {
case DEC_INIT_BASE:
/* [use defaults] */
break;
case DEC_INIT_DECIMAL32:
context->digits=7; /* digits */
context->emax=96; /* Emax */
context->emin=-95; /* Emin */
context->round=DEC_ROUND_HALF_EVEN; /* 0.5 to nearest even */
context->traps=0; /* no traps set */
context->clamp=1; /* clamp exponents */
#if DECSUBSET
context->extended=1; /* set */
#endif
break;
case DEC_INIT_DECIMAL64:
context->digits=16; /* digits */
context->emax=384; /* Emax */
context->emin=-383; /* Emin */
context->round=DEC_ROUND_HALF_EVEN; /* 0.5 to nearest even */
context->traps=0; /* no traps set */
context->clamp=1; /* clamp exponents */
#if DECSUBSET
context->extended=1; /* set */
#endif
break;
case DEC_INIT_DECIMAL128:
context->digits=34; /* digits */
context->emax=6144; /* Emax */
context->emin=-6143; /* Emin */
context->round=DEC_ROUND_HALF_EVEN; /* 0.5 to nearest even */
context->traps=0; /* no traps set */
context->clamp=1; /* clamp exponents */
#if DECSUBSET
context->extended=1; /* set */
#endif
break;
default: /* invalid Kind */
/* use defaults, and .. */
decContextSetStatus(context, DEC_Invalid_operation); /* trap */
}
#if DECCHECK
if (LITEND!=DECLITEND) {
const char *adj;
if (LITEND) adj="little";
else adj="big";
printf("Warning: DECLITEND is set to %d, but this computer appears to be %s-endian\n",
DECLITEND, adj);
}
#endif
return context;} /* decContextDefault */
/* ------------------------------------------------------------------ */
/* decContextGetRounding -- return current rounding mode */
/* */
/* context is the context structure to be queried */
/* returns the rounding mode */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
enum rounding decContextGetRounding(decContext *context) {
return context->round;
} /* decContextGetRounding */
/* ------------------------------------------------------------------ */
/* decContextGetStatus -- return current status */
/* */
/* context is the context structure to be queried */
/* returns status */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
uInt decContextGetStatus(decContext *context) {
return context->status;
} /* decContextGetStatus */
/* ------------------------------------------------------------------ */
/* decContextRestoreStatus -- restore bits in current status */
/* */
/* context is the context structure to be updated */
/* newstatus is the source for the bits to be restored */
/* mask indicates the bits to be restored (the status bit that */
/* corresponds to each 1 bit in the mask is set to the value of */
/* the correspnding bit in newstatus) */
/* returns context */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decContext *decContextRestoreStatus(decContext *context,
uInt newstatus, uInt mask) {
context->status&=~mask; /* clear the selected bits */
context->status|=(mask&newstatus); /* or in the new bits */
return context;
} /* decContextRestoreStatus */
/* ------------------------------------------------------------------ */
/* decContextSaveStatus -- save bits in current status */
/* */
/* context is the context structure to be queried */
/* mask indicates the bits to be saved (the status bits that */
/* correspond to each 1 bit in the mask are saved) */
/* returns the AND of the mask and the current status */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
uInt decContextSaveStatus(decContext *context, uInt mask) {
return context->status&mask;
} /* decContextSaveStatus */
/* ------------------------------------------------------------------ */
/* decContextSetRounding -- set current rounding mode */
/* */
/* context is the context structure to be updated */
/* newround is the value which will replace the current mode */
/* returns context */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decContext *decContextSetRounding(decContext *context,
enum rounding newround) {
context->round=newround;
return context;
} /* decContextSetRounding */
/* ------------------------------------------------------------------ */
/* decContextSetStatus -- set status and raise trap if appropriate */
/* */
/* context is the context structure to be updated */
/* status is the DEC_ exception code */
/* returns the context structure */
/* */
/* Control may never return from this routine, if there is a signal */
/* handler and it takes a long jump. */
/* ------------------------------------------------------------------ */
decContext * decContextSetStatus(decContext *context, uInt status) {
context->status|=status;
if (status & context->traps) raise(SIGFPE);
return context;} /* decContextSetStatus */
/* ------------------------------------------------------------------ */
/* decContextSetStatusFromString -- set status from a string + trap */
/* */
/* context is the context structure to be updated */
/* string is a string exactly equal to one that might be returned */
/* by decContextStatusToString */
/* */
/* The status bit corresponding to the string is set, and a trap */
/* is raised if appropriate. */
/* */
/* returns the context structure, unless the string is equal to */
/* DEC_Condition_MU or is not recognized. In these cases NULL is */
/* returned. */
/* ------------------------------------------------------------------ */
decContext * decContextSetStatusFromString(decContext *context,
const char *string) {
if (strcmp(string, DEC_Condition_CS)==0)
return decContextSetStatus(context, DEC_Conversion_syntax);
if (strcmp(string, DEC_Condition_DZ)==0)
return decContextSetStatus(context, DEC_Division_by_zero);
if (strcmp(string, DEC_Condition_DI)==0)
return decContextSetStatus(context, DEC_Division_impossible);
if (strcmp(string, DEC_Condition_DU)==0)
return decContextSetStatus(context, DEC_Division_undefined);
if (strcmp(string, DEC_Condition_IE)==0)
return decContextSetStatus(context, DEC_Inexact);
if (strcmp(string, DEC_Condition_IS)==0)
return decContextSetStatus(context, DEC_Insufficient_storage);
if (strcmp(string, DEC_Condition_IC)==0)
return decContextSetStatus(context, DEC_Invalid_context);
if (strcmp(string, DEC_Condition_IO)==0)
return decContextSetStatus(context, DEC_Invalid_operation);
#if DECSUBSET
if (strcmp(string, DEC_Condition_LD)==0)
return decContextSetStatus(context, DEC_Lost_digits);
#endif
if (strcmp(string, DEC_Condition_OV)==0)
return decContextSetStatus(context, DEC_Overflow);
if (strcmp(string, DEC_Condition_PA)==0)
return decContextSetStatus(context, DEC_Clamped);
if (strcmp(string, DEC_Condition_RO)==0)
return decContextSetStatus(context, DEC_Rounded);
if (strcmp(string, DEC_Condition_SU)==0)
return decContextSetStatus(context, DEC_Subnormal);
if (strcmp(string, DEC_Condition_UN)==0)
return decContextSetStatus(context, DEC_Underflow);
if (strcmp(string, DEC_Condition_ZE)==0)
return context;
return NULL; /* Multiple status, or unknown */
} /* decContextSetStatusFromString */
/* ------------------------------------------------------------------ */
/* decContextSetStatusFromStringQuiet -- set status from a string */
/* */
/* context is the context structure to be updated */
/* string is a string exactly equal to one that might be returned */
/* by decContextStatusToString */
/* */
/* The status bit corresponding to the string is set; no trap is */
/* raised. */
/* */
/* returns the context structure, unless the string is equal to */
/* DEC_Condition_MU or is not recognized. In these cases NULL is */
/* returned. */
/* ------------------------------------------------------------------ */
decContext * decContextSetStatusFromStringQuiet(decContext *context,
const char *string) {
if (strcmp(string, DEC_Condition_CS)==0)
return decContextSetStatusQuiet(context, DEC_Conversion_syntax);
if (strcmp(string, DEC_Condition_DZ)==0)
return decContextSetStatusQuiet(context, DEC_Division_by_zero);
if (strcmp(string, DEC_Condition_DI)==0)
return decContextSetStatusQuiet(context, DEC_Division_impossible);
if (strcmp(string, DEC_Condition_DU)==0)
return decContextSetStatusQuiet(context, DEC_Division_undefined);
if (strcmp(string, DEC_Condition_IE)==0)
return decContextSetStatusQuiet(context, DEC_Inexact);
if (strcmp(string, DEC_Condition_IS)==0)
return decContextSetStatusQuiet(context, DEC_Insufficient_storage);
if (strcmp(string, DEC_Condition_IC)==0)
return decContextSetStatusQuiet(context, DEC_Invalid_context);
if (strcmp(string, DEC_Condition_IO)==0)
return decContextSetStatusQuiet(context, DEC_Invalid_operation);
#if DECSUBSET
if (strcmp(string, DEC_Condition_LD)==0)
return decContextSetStatusQuiet(context, DEC_Lost_digits);
#endif
if (strcmp(string, DEC_Condition_OV)==0)
return decContextSetStatusQuiet(context, DEC_Overflow);
if (strcmp(string, DEC_Condition_PA)==0)
return decContextSetStatusQuiet(context, DEC_Clamped);
if (strcmp(string, DEC_Condition_RO)==0)
return decContextSetStatusQuiet(context, DEC_Rounded);
if (strcmp(string, DEC_Condition_SU)==0)
return decContextSetStatusQuiet(context, DEC_Subnormal);
if (strcmp(string, DEC_Condition_UN)==0)
return decContextSetStatusQuiet(context, DEC_Underflow);
if (strcmp(string, DEC_Condition_ZE)==0)
return context;
return NULL; /* Multiple status, or unknown */
} /* decContextSetStatusFromStringQuiet */
/* ------------------------------------------------------------------ */
/* decContextSetStatusQuiet -- set status without trap */
/* */
/* context is the context structure to be updated */
/* status is the DEC_ exception code */
/* returns the context structure */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decContext * decContextSetStatusQuiet(decContext *context, uInt status) {
context->status|=status;
return context;} /* decContextSetStatusQuiet */
/* ------------------------------------------------------------------ */
/* decContextStatusToString -- convert status flags to a string */
/* */
/* context is a context with valid status field */
/* */
/* returns a constant string describing the condition. If multiple */
/* (or no) flags are set, a generic constant message is returned. */
/* ------------------------------------------------------------------ */
const char *decContextStatusToString(const decContext *context) {
Int status=context->status;
/* test the five IEEE first, as some of the others are ambiguous when */
/* DECEXTFLAG=0 */
if (status==DEC_Invalid_operation ) return DEC_Condition_IO;
if (status==DEC_Division_by_zero ) return DEC_Condition_DZ;
if (status==DEC_Overflow ) return DEC_Condition_OV;
if (status==DEC_Underflow ) return DEC_Condition_UN;
if (status==DEC_Inexact ) return DEC_Condition_IE;
if (status==DEC_Division_impossible ) return DEC_Condition_DI;
if (status==DEC_Division_undefined ) return DEC_Condition_DU;
if (status==DEC_Rounded ) return DEC_Condition_RO;
if (status==DEC_Clamped ) return DEC_Condition_PA;
if (status==DEC_Subnormal ) return DEC_Condition_SU;
if (status==DEC_Conversion_syntax ) return DEC_Condition_CS;
if (status==DEC_Insufficient_storage ) return DEC_Condition_IS;
if (status==DEC_Invalid_context ) return DEC_Condition_IC;
#if DECSUBSET
if (status==DEC_Lost_digits ) return DEC_Condition_LD;
#endif
if (status==0 ) return DEC_Condition_ZE;
return DEC_Condition_MU; /* Multiple errors */
} /* decContextStatusToString */
/* ------------------------------------------------------------------ */
/* decContextTestSavedStatus -- test bits in saved status */
/* */
/* oldstatus is the status word to be tested */
/* mask indicates the bits to be tested (the oldstatus bits that */
/* correspond to each 1 bit in the mask are tested) */
/* returns 1 if any of the tested bits are 1, or 0 otherwise */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
uInt decContextTestSavedStatus(uInt oldstatus, uInt mask) {
return (oldstatus&mask)!=0;
} /* decContextTestSavedStatus */
/* ------------------------------------------------------------------ */
/* decContextTestStatus -- test bits in current status */
/* */
/* context is the context structure to be updated */
/* mask indicates the bits to be tested (the status bits that */
/* correspond to each 1 bit in the mask are tested) */
/* returns 1 if any of the tested bits are 1, or 0 otherwise */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
uInt decContextTestStatus(decContext *context, uInt mask) {
return (context->status&mask)!=0;
} /* decContextTestStatus */
/* ------------------------------------------------------------------ */
/* decContextZeroStatus -- clear all status bits */
/* */
/* context is the context structure to be updated */
/* returns context */
/* */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decContext *decContextZeroStatus(decContext *context) {
context->status=0;
return context;
} /* decContextZeroStatus */
libdecnumber/decNumber.c 0 → 100644
浏览文件 @ 72ac97cd
此差异已折叠。
libdecnumber/dpd/decimal128.c 0 → 100644
浏览文件 @ 72ac97cd
此差异已折叠。
libdecnumber/dpd/decimal128Local.h 0 → 100644
浏览文件 @ 72ac97cd
/* Local definitions for use with the decNumber C Library.
Copyright (C) 2007, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#if !defined(DECIMAL128LOCAL)
/* The compiler needs sign manipulation functions for decimal128 which
are not part of the decNumber package. */
/* Set sign; this assumes the sign was previously zero. */
#define decimal128SetSign(d,b) \
{ (d)->bytes[WORDS_BIGENDIAN ? 0 : 15] |= ((unsigned) (b) << 7); }
/* Clear sign. */
#define decimal128ClearSign(d) \
{ (d)->bytes[WORDS_BIGENDIAN ? 0 : 15] &= ~0x80; }
/* Flip sign. */
#define decimal128FlipSign(d) \
{ (d)->bytes[WORDS_BIGENDIAN ? 0 : 15] ^= 0x80; }
#endif
libdecnumber/dpd/decimal32.c 0 → 100644
浏览文件 @ 72ac97cd
/* Decimal 32-bit format module for the decNumber C Library.
Copyright (C) 2005, 2007 Free Software Foundation, Inc.
Contributed by IBM Corporation. Author Mike Cowlishaw.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.
In addition to the permissions in the GNU General Public License,
the Free Software Foundation gives you unlimited permission to link
the compiled version of this file into combinations with other
programs, and to distribute those combinations without any
restriction coming from the use of this file. (The General Public
License restrictions do apply in other respects; for example, they
cover modification of the file, and distribution when not linked
into a combine executable.)
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA. */
/* ------------------------------------------------------------------ */
/* Decimal 32-bit format module */
/* ------------------------------------------------------------------ */
/* This module comprises the routines for decimal32 format numbers. */
/* Conversions are supplied to and from decNumber and String. */
/* */
/* This is used when decNumber provides operations, either for all */
/* operations or as a proxy between decNumber and decSingle. */
/* */
/* Error handling is the same as decNumber (qv.). */
/* ------------------------------------------------------------------ */
#include <string.h> /* [for memset/memcpy] */
#include <stdio.h> /* [for printf] */
#include "dconfig.h" /* GCC definitions */
#define DECNUMDIGITS 7 /* make decNumbers with space for 7 */
#include "decNumber.h" /* base number library */
#include "decNumberLocal.h" /* decNumber local types, etc. */
#include "decimal32.h" /* our primary include */
/* Utility tables and routines [in decimal64.c] */
extern const uInt COMBEXP[32], COMBMSD[32];
extern const uShort DPD2BIN[1024];
extern const uShort BIN2DPD[1000];
extern const uByte BIN2CHAR[4001];
extern void decDigitsToDPD(const decNumber *, uInt *, Int);
extern void decDigitsFromDPD(decNumber *, const uInt *, Int);
#if DECTRACE || DECCHECK
void decimal32Show(const decimal32 *); /* for debug */
extern void decNumberShow(const decNumber *); /* .. */
#endif
/* Useful macro */
/* Clear a structure (e.g., a decNumber) */
#define DEC_clear(d) memset(d, 0, sizeof(*d))
/* ------------------------------------------------------------------ */
/* decimal32FromNumber -- convert decNumber to decimal32 */
/* */
/* ds is the target decimal32 */
/* dn is the source number (assumed valid) */
/* set is the context, used only for reporting errors */
/* */
/* The set argument is used only for status reporting and for the */
/* rounding mode (used if the coefficient is more than DECIMAL32_Pmax */
/* digits or an overflow is detected). If the exponent is out of the */
/* valid range then Overflow or Underflow will be raised. */
/* After Underflow a subnormal result is possible. */
/* */
/* DEC_Clamped is set if the number has to be 'folded down' to fit, */
/* by reducing its exponent and multiplying the coefficient by a */
/* power of ten, or if the exponent on a zero had to be clamped. */
/* ------------------------------------------------------------------ */
decimal32 * decimal32FromNumber(decimal32 *d32, const decNumber *dn,
decContext *set) {
uInt status=0; /* status accumulator */
Int ae; /* adjusted exponent */
decNumber dw; /* work */
decContext dc; /* .. */
uInt *pu; /* .. */
uInt comb, exp; /* .. */
uInt targ=0; /* target 32-bit */
/* If the number has too many digits, or the exponent could be */
/* out of range then reduce the number under the appropriate */
/* constraints. This could push the number to Infinity or zero, */
/* so this check and rounding must be done before generating the */
/* decimal32] */
ae=dn->exponent+dn->digits-1; /* [0 if special] */
if (dn->digits>DECIMAL32_Pmax /* too many digits */
|| ae>DECIMAL32_Emax /* likely overflow */
|| ae<DECIMAL32_Emin) { /* likely underflow */
decContextDefault(&dc, DEC_INIT_DECIMAL32); /* [no traps] */
dc.round=set->round; /* use supplied rounding */
decNumberPlus(&dw, dn, &dc); /* (round and check) */
/* [this changes -0 to 0, so enforce the sign...] */
dw.bits|=dn->bits&DECNEG;
status=dc.status; /* save status */
dn=&dw; /* use the work number */
} /* maybe out of range */
if (dn->bits&DECSPECIAL) { /* a special value */
if (dn->bits&DECINF) targ=DECIMAL_Inf<<24;
else { /* sNaN or qNaN */
if ((*dn->lsu!=0 || dn->digits>1) /* non-zero coefficient */
&& (dn->digits<DECIMAL32_Pmax)) { /* coefficient fits */
decDigitsToDPD(dn, &targ, 0);
}
if (dn->bits&DECNAN) targ|=DECIMAL_NaN<<24;
else targ|=DECIMAL_sNaN<<24;
} /* a NaN */
} /* special */
else { /* is finite */
if (decNumberIsZero(dn)) { /* is a zero */
/* set and clamp exponent */
if (dn->exponent<-DECIMAL32_Bias) {
exp=0; /* low clamp */
status|=DEC_Clamped;
}
else {
exp=dn->exponent+DECIMAL32_Bias; /* bias exponent */
if (exp>DECIMAL32_Ehigh) { /* top clamp */
exp=DECIMAL32_Ehigh;
status|=DEC_Clamped;
}
}
comb=(exp>>3) & 0x18; /* msd=0, exp top 2 bits .. */
}
else { /* non-zero finite number */
uInt msd; /* work */
Int pad=0; /* coefficient pad digits */
/* the dn is known to fit, but it may need to be padded */
exp=(uInt)(dn->exponent+DECIMAL32_Bias); /* bias exponent */
if (exp>DECIMAL32_Ehigh) { /* fold-down case */
pad=exp-DECIMAL32_Ehigh;
exp=DECIMAL32_Ehigh; /* [to maximum] */
status|=DEC_Clamped;
}
/* fastpath common case */
if (DECDPUN==3 && pad==0) {
targ=BIN2DPD[dn->lsu[0]];
if (dn->digits>3) targ|=(uInt)(BIN2DPD[dn->lsu[1]])<<10;
msd=(dn->digits==7 ? dn->lsu[2] : 0);
}
else { /* general case */
decDigitsToDPD(dn, &targ, pad);
/* save and clear the top digit */
msd=targ>>20;
targ&=0x000fffff;
}
/* create the combination field */
if (msd>=8) comb=0x18 | ((exp>>5) & 0x06) | (msd & 0x01);
else comb=((exp>>3) & 0x18) | msd;
}
targ|=comb<<26; /* add combination field .. */
targ|=(exp&0x3f)<<20; /* .. and exponent continuation */
} /* finite */
if (dn->bits&DECNEG) targ|=0x80000000; /* add sign bit */
/* now write to storage; this is endian */
pu=(uInt *)d32->bytes; /* overlay */
*pu=targ; /* directly store the int */
if (status!=0) decContextSetStatus(set, status); /* pass on status */
/* decimal32Show(d32); */
return d32;
} /* decimal32FromNumber */
/* ------------------------------------------------------------------ */
/* decimal32ToNumber -- convert decimal32 to decNumber */
/* d32 is the source decimal32 */
/* dn is the target number, with appropriate space */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decNumber * decimal32ToNumber(const decimal32 *d32, decNumber *dn) {
uInt msd; /* coefficient MSD */
uInt exp; /* exponent top two bits */
uInt comb; /* combination field */
uInt sour; /* source 32-bit */
const uInt *pu; /* work */
/* load source from storage; this is endian */
pu=(const uInt *)d32->bytes; /* overlay */
sour=*pu; /* directly load the int */
comb=(sour>>26)&0x1f; /* combination field */
decNumberZero(dn); /* clean number */
if (sour&0x80000000) dn->bits=DECNEG; /* set sign if negative */
msd=COMBMSD[comb]; /* decode the combination field */
exp=COMBEXP[comb]; /* .. */
if (exp==3) { /* is a special */
if (msd==0) {
dn->bits|=DECINF;
return dn; /* no coefficient needed */
}
else if (sour&0x02000000) dn->bits|=DECSNAN;
else dn->bits|=DECNAN;
msd=0; /* no top digit */
}
else { /* is a finite number */
dn->exponent=(exp<<6)+((sour>>20)&0x3f)-DECIMAL32_Bias; /* unbiased */
}
/* get the coefficient */
sour&=0x000fffff; /* clean coefficient continuation */
if (msd) { /* non-zero msd */
sour|=msd<<20; /* prefix to coefficient */
decDigitsFromDPD(dn, &sour, 3); /* process 3 declets */
return dn;
}
/* msd=0 */
if (!sour) return dn; /* easy: coefficient is 0 */
if (sour&0x000ffc00) /* need 2 declets? */
decDigitsFromDPD(dn, &sour, 2); /* process 2 declets */
else
decDigitsFromDPD(dn, &sour, 1); /* process 1 declet */
return dn;
} /* decimal32ToNumber */
/* ------------------------------------------------------------------ */
/* to-scientific-string -- conversion to numeric string */
/* to-engineering-string -- conversion to numeric string */
/* */
/* decimal32ToString(d32, string); */
/* decimal32ToEngString(d32, string); */
/* */
/* d32 is the decimal32 format number to convert */
/* string is the string where the result will be laid out */
/* */
/* string must be at least 24 characters */
/* */
/* No error is possible, and no status can be set. */
/* ------------------------------------------------------------------ */
char * decimal32ToEngString(const decimal32 *d32, char *string){
decNumber dn; /* work */
decimal32ToNumber(d32, &dn);
decNumberToEngString(&dn, string);
return string;
} /* decimal32ToEngString */
char * decimal32ToString(const decimal32 *d32, char *string){
uInt msd; /* coefficient MSD */
Int exp; /* exponent top two bits or full */
uInt comb; /* combination field */
char *cstart; /* coefficient start */
char *c; /* output pointer in string */
const uInt *pu; /* work */
const uByte *u; /* .. */
char *s, *t; /* .. (source, target) */
Int dpd; /* .. */
Int pre, e; /* .. */
uInt sour; /* source 32-bit */
/* load source from storage; this is endian */
pu=(const uInt *)d32->bytes; /* overlay */
sour=*pu; /* directly load the int */
c=string; /* where result will go */
if (((Int)sour)<0) *c++='-'; /* handle sign */
comb=(sour>>26)&0x1f; /* combination field */
msd=COMBMSD[comb]; /* decode the combination field */
exp=COMBEXP[comb]; /* .. */
if (exp==3) {
if (msd==0) { /* infinity */
strcpy(c, "Inf");
strcpy(c+3, "inity");
return string; /* easy */
}
if (sour&0x02000000) *c++='s'; /* sNaN */
strcpy(c, "NaN"); /* complete word */
c+=3; /* step past */
if ((sour&0x000fffff)==0) return string; /* zero payload */
/* otherwise drop through to add integer; set correct exp */
exp=0; msd=0; /* setup for following code */
}
else exp=(exp<<6)+((sour>>20)&0x3f)-DECIMAL32_Bias; /* unbiased */
/* convert 7 digits of significand to characters */
cstart=c; /* save start of coefficient */
if (msd) *c++='0'+(char)msd; /* non-zero most significant digit */
/* Now decode the declets. After extracting each one, it is */
/* decoded to binary and then to a 4-char sequence by table lookup; */
/* the 4-chars are a 1-char length (significant digits, except 000 */
/* has length 0). This allows us to left-align the first declet */
/* with non-zero content, then remaining ones are full 3-char */
/* length. We use fixed-length memcpys because variable-length */
/* causes a subroutine call in GCC. (These are length 4 for speed */
/* and are safe because the array has an extra terminator byte.) */
#define dpd2char u=&BIN2CHAR[DPD2BIN[dpd]*4]; \
if (c!=cstart) {memcpy(c, u+1, 4); c+=3;} \
else if (*u) {memcpy(c, u+4-*u, 4); c+=*u;}
dpd=(sour>>10)&0x3ff; /* declet 1 */
dpd2char;
dpd=(sour)&0x3ff; /* declet 2 */
dpd2char;
if (c==cstart) *c++='0'; /* all zeros -- make 0 */
if (exp==0) { /* integer or NaN case -- easy */
*c='\0'; /* terminate */
return string;
}
/* non-0 exponent */
e=0; /* assume no E */
pre=c-cstart+exp;
/* [here, pre-exp is the digits count (==1 for zero)] */
if (exp>0 || pre<-5) { /* need exponential form */
e=pre-1; /* calculate E value */
pre=1; /* assume one digit before '.' */
} /* exponential form */
/* modify the coefficient, adding 0s, '.', and E+nn as needed */
s=c-1; /* source (LSD) */
if (pre>0) { /* ddd.ddd (plain), perhaps with E */
char *dotat=cstart+pre;
if (dotat<c) { /* if embedded dot needed... */
t=c; /* target */
for (; s>=dotat; s--, t--) *t=*s; /* open the gap; leave t at gap */
*t='.'; /* insert the dot */
c++; /* length increased by one */
}
/* finally add the E-part, if needed; it will never be 0, and has */
/* a maximum length of 3 digits (E-101 case) */
if (e!=0) {
*c++='E'; /* starts with E */
*c++='+'; /* assume positive */
if (e<0) {
*(c-1)='-'; /* oops, need '-' */
e=-e; /* uInt, please */
}
u=&BIN2CHAR[e*4]; /* -> length byte */
memcpy(c, u+4-*u, 4); /* copy fixed 4 characters [is safe] */
c+=*u; /* bump pointer appropriately */
}
*c='\0'; /* add terminator */
/*printf("res %s\n", string); */
return string;
} /* pre>0 */
/* -5<=pre<=0: here for plain 0.ddd or 0.000ddd forms (can never have E) */
t=c+1-pre;
*(t+1)='\0'; /* can add terminator now */
for (; s>=cstart; s--, t--) *t=*s; /* shift whole coefficient right */
c=cstart;
*c++='0'; /* always starts with 0. */
*c++='.';
for (; pre<0; pre++) *c++='0'; /* add any 0's after '.' */
/*printf("res %s\n", string); */
return string;
} /* decimal32ToString */
/* ------------------------------------------------------------------ */
/* to-number -- conversion from numeric string */
/* */
/* decimal32FromString(result, string, set); */
/* */
/* result is the decimal32 format number which gets the result of */
/* the conversion */
/* *string is the character string which should contain a valid */
/* number (which may be a special value) */
/* set is the context */
/* */
/* The context is supplied to this routine is used for error handling */
/* (setting of status and traps) and for the rounding mode, only. */
/* If an error occurs, the result will be a valid decimal32 NaN. */
/* ------------------------------------------------------------------ */
decimal32 * decimal32FromString(decimal32 *result, const char *string,
decContext *set) {
decContext dc; /* work */
decNumber dn; /* .. */
decContextDefault(&dc, DEC_INIT_DECIMAL32); /* no traps, please */
dc.round=set->round; /* use supplied rounding */
decNumberFromString(&dn, string, &dc); /* will round if needed */
decimal32FromNumber(result, &dn, &dc);
if (dc.status!=0) { /* something happened */
decContextSetStatus(set, dc.status); /* .. pass it on */
}
return result;
} /* decimal32FromString */
/* ------------------------------------------------------------------ */
/* decimal32IsCanonical -- test whether encoding is canonical */
/* d32 is the source decimal32 */
/* returns 1 if the encoding of d32 is canonical, 0 otherwise */
/* No error is possible. */
/* ------------------------------------------------------------------ */
uint32_t decimal32IsCanonical(const decimal32 *d32) {
decNumber dn; /* work */
decimal32 canon; /* .. */
decContext dc; /* .. */
decContextDefault(&dc, DEC_INIT_DECIMAL32);
decimal32ToNumber(d32, &dn);
decimal32FromNumber(&canon, &dn, &dc);/* canon will now be canonical */
return memcmp(d32, &canon, DECIMAL32_Bytes)==0;
} /* decimal32IsCanonical */
/* ------------------------------------------------------------------ */
/* decimal32Canonical -- copy an encoding, ensuring it is canonical */
/* d32 is the source decimal32 */
/* result is the target (may be the same decimal32) */
/* returns result */
/* No error is possible. */
/* ------------------------------------------------------------------ */
decimal32 * decimal32Canonical(decimal32 *result, const decimal32 *d32) {
decNumber dn; /* work */
decContext dc; /* .. */
decContextDefault(&dc, DEC_INIT_DECIMAL32);
decimal32ToNumber(d32, &dn);
decimal32FromNumber(result, &dn, &dc);/* result will now be canonical */
return result;
} /* decimal32Canonical */
#if DECTRACE || DECCHECK
/* Macros for accessing decimal32 fields. These assume the argument
is a reference (pointer) to the decimal32 structure, and the
decimal32 is in network byte order (big-endian) */
/* Get sign */
#define decimal32Sign(d) ((unsigned)(d)->bytes[0]>>7)
/* Get combination field */
#define decimal32Comb(d) (((d)->bytes[0] & 0x7c)>>2)
/* Get exponent continuation [does not remove bias] */
#define decimal32ExpCon(d) ((((d)->bytes[0] & 0x03)<<4) \
| ((unsigned)(d)->bytes[1]>>4))
/* Set sign [this assumes sign previously 0] */
#define decimal32SetSign(d, b) { \
(d)->bytes[0]|=((unsigned)(b)<<7);}
/* Set exponent continuation [does not apply bias] */
/* This assumes range has been checked and exponent previously 0; */
/* type of exponent must be unsigned */
#define decimal32SetExpCon(d, e) { \
(d)->bytes[0]|=(uint8_t)((e)>>4); \
(d)->bytes[1]|=(uint8_t)(((e)&0x0F)<<4);}
/* ------------------------------------------------------------------ */
/* decimal32Show -- display a decimal32 in hexadecimal [debug aid] */
/* d32 -- the number to show */
/* ------------------------------------------------------------------ */
/* Also shows sign/cob/expconfields extracted - valid bigendian only */
void decimal32Show(const decimal32 *d32) {
char buf[DECIMAL32_Bytes*2+1];
Int i, j=0;
if (DECLITEND) {
for (i=0; i<DECIMAL32_Bytes; i++, j+=2) {
sprintf(&buf[j], "%02x", d32->bytes[3-i]);
}
printf(" D32> %s [S:%d Cb:%02x Ec:%02x] LittleEndian\n", buf,
d32->bytes[3]>>7, (d32->bytes[3]>>2)&0x1f,
((d32->bytes[3]&0x3)<<4)| (d32->bytes[2]>>4));
}
else {
for (i=0; i<DECIMAL32_Bytes; i++, j+=2) {
sprintf(&buf[j], "%02x", d32->bytes[i]);
}
printf(" D32> %s [S:%d Cb:%02x Ec:%02x] BigEndian\n", buf,
decimal32Sign(d32), decimal32Comb(d32), decimal32ExpCon(d32));
}
} /* decimal32Show */
#endif
libdecnumber/dpd/decimal64.c 0 → 100644
浏览文件 @ 72ac97cd
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