4a44abab56
PR other/37897 * decDouble.h (decDouble): Replace struct with union accessible by more types. * decSingle.h (decSingle): Ditto. * decQuad.h (decQuad): Ditto. * decNumberLocal.h (DFWORD, DFBYTE, DFWWORD): access decFloat via new members. * decBasic.c (decFloatCompareTotal): Avoid type-pun violation. (decNumberCompare): Ditto. From-SVN: r141386
104 lines
5.0 KiB
C
104 lines
5.0 KiB
C
/* decSingle module header for the decNumber C Library.
|
|
Copyright (C) 2005 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. */
|
|
|
|
/* ------------------------------------------------------------------ */
|
|
/* decSingle.h -- Decimal 32-bit format module header */
|
|
/* ------------------------------------------------------------------ */
|
|
/* Please see decFloats.h for an overview and documentation details. */
|
|
/* ------------------------------------------------------------------ */
|
|
|
|
#if !defined(DECSINGLE)
|
|
#define DECSINGLE
|
|
|
|
#define DECSINGLENAME "decSingle" /* Short name */
|
|
#define DECSINGLETITLE "Decimal 32-bit datum" /* Verbose name */
|
|
#define DECSINGLEAUTHOR "Mike Cowlishaw" /* Who to blame */
|
|
|
|
/* parameters for decSingles */
|
|
#define DECSINGLE_Bytes 4 /* length */
|
|
#define DECSINGLE_Pmax 7 /* maximum precision (digits) */
|
|
#define DECSINGLE_Emin -95 /* minimum adjusted exponent */
|
|
#define DECSINGLE_Emax 96 /* maximum adjusted exponent */
|
|
#define DECSINGLE_EmaxD 3 /* maximum exponent digits */
|
|
#define DECSINGLE_Bias 101 /* bias for the exponent */
|
|
#define DECSINGLE_String 16 /* maximum string length, +1 */
|
|
#define DECSINGLE_EconL 6 /* exponent continuation length */
|
|
#define DECSINGLE_Declets 2 /* count of declets */
|
|
/* highest biased exponent (Elimit-1) */
|
|
#define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1))
|
|
|
|
/* Required includes */
|
|
#include "decContext.h"
|
|
#include "decQuad.h"
|
|
#include "decDouble.h"
|
|
|
|
/* The decSingle decimal 32-bit type, accessible by various types */
|
|
typedef union {
|
|
uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */
|
|
uint16_t shorts[DECSINGLE_Bytes/2];
|
|
uint32_t words[DECSINGLE_Bytes/4];
|
|
} decSingle;
|
|
|
|
/* ---------------------------------------------------------------- */
|
|
/* Routines -- implemented as decFloat routines in common files */
|
|
/* ---------------------------------------------------------------- */
|
|
|
|
#include "decSingleSymbols.h"
|
|
|
|
/* Utilities (binary argument(s) or result, extractors, etc.) */
|
|
extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t);
|
|
extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *);
|
|
extern decSingle * decSingleFromString(decSingle *, const char *, decContext *);
|
|
extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *);
|
|
extern int32_t decSingleGetCoefficient(const decSingle *, uint8_t *);
|
|
extern int32_t decSingleGetExponent(const decSingle *);
|
|
extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t);
|
|
extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t);
|
|
extern void decSingleShow(const decSingle *, const char *);
|
|
extern int32_t decSingleToBCD(const decSingle *, int32_t *, uint8_t *);
|
|
extern char * decSingleToEngString(const decSingle *, char *);
|
|
extern int32_t decSingleToPacked(const decSingle *, int32_t *, uint8_t *);
|
|
extern char * decSingleToString(const decSingle *, char *);
|
|
extern decDouble * decSingleToWider(const decSingle *, decDouble *);
|
|
extern decSingle * decSingleZero(decSingle *);
|
|
|
|
/* (No Arithmetic routines for decSingle) */
|
|
|
|
/* Non-computational */
|
|
extern uint32_t decSingleRadix(const decSingle *);
|
|
extern const char * decSingleVersion(void);
|
|
|
|
/* decNumber conversions; these are implemented as macros so as not */
|
|
/* to force a dependency on decimal32 and decNumber in decSingle. */
|
|
#define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn)
|
|
#define decSingleFromNumber(dq, dn, set) (decSingle *)decimal32FromNumber((decimal32 *)(dq), dn, set)
|
|
|
|
#endif
|