1/* decSingle module header for the decNumber C Library.
2   Copyright (C) 2005-2015 Free Software Foundation, Inc.
3   Contributed by IBM Corporation.  Author Mike Cowlishaw.
4
5   This file is part of GCC.
6
7   GCC is free software; you can redistribute it and/or modify it under
8   the terms of the GNU General Public License as published by the Free
9   Software Foundation; either version 3, or (at your option) any later
10   version.
11
12   GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13   WARRANTY; without even the implied warranty of MERCHANTABILITY or
14   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15   for more details.
16
17Under Section 7 of GPL version 3, you are granted additional
18permissions described in the GCC Runtime Library Exception, version
193.1, as published by the Free Software Foundation.
20
21You should have received a copy of the GNU General Public License and
22a copy of the GCC Runtime Library Exception along with this program;
23see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
24<http://www.gnu.org/licenses/>.  */
25
26/* ------------------------------------------------------------------ */
27/* decSingle.h -- Decimal 32-bit format module header		      */
28/* ------------------------------------------------------------------ */
29
30#if !defined(DECSINGLE)
31  #define DECSINGLE
32
33  #define DECSINGLENAME       "decSingle"	      /* Short name   */
34  #define DECSINGLETITLE      "Decimal 32-bit datum"  /* Verbose name */
35  #define DECSINGLEAUTHOR     "Mike Cowlishaw"	      /* Who to blame */
36
37  /* parameters for decSingles */
38  #define DECSINGLE_Bytes    4	   /* length			      */
39  #define DECSINGLE_Pmax     7	   /* maximum precision (digits)      */
40  #define DECSINGLE_Emin   -95	   /* minimum adjusted exponent       */
41  #define DECSINGLE_Emax    96	   /* maximum adjusted exponent       */
42  #define DECSINGLE_EmaxD    3	   /* maximum exponent digits	      */
43  #define DECSINGLE_Bias   101	   /* bias for the exponent	      */
44  #define DECSINGLE_String  16	   /* maximum string length, +1       */
45  #define DECSINGLE_EconL    6	   /* exponent continuation length    */
46  #define DECSINGLE_Declets  2	   /* count of declets		      */
47  /* highest biased exponent (Elimit-1) */
48  #define DECSINGLE_Ehigh (DECSINGLE_Emax + DECSINGLE_Bias - (DECSINGLE_Pmax-1))
49
50  /* Required includes						      */
51  #include "decContext.h"
52  #include "decQuad.h"
53  #include "decDouble.h"
54
55  /* The decSingle decimal 32-bit type, accessible by all sizes */
56  typedef union {
57    uint8_t   bytes[DECSINGLE_Bytes];	/* fields: 1, 5, 6, 20 bits */
58    uint16_t shorts[DECSINGLE_Bytes/2];
59    uint32_t  words[DECSINGLE_Bytes/4];
60    } decSingle;
61
62  /* ---------------------------------------------------------------- */
63  /* Routines -- implemented as decFloat routines in common files     */
64  /* ---------------------------------------------------------------- */
65
66  #include "decSingleSymbols.h"
67
68  /* Utilities (binary argument(s) or result, extractors, etc.) */
69  extern decSingle * decSingleFromBCD(decSingle *, int32_t, const uint8_t *, int32_t);
70  extern decSingle * decSingleFromPacked(decSingle *, int32_t, const uint8_t *);
71  extern decSingle * decSingleFromPackedChecked(decSingle *, int32_t, const uint8_t *);
72  extern decSingle * decSingleFromString(decSingle *, const char *, decContext *);
73  extern decSingle * decSingleFromWider(decSingle *, const decDouble *, decContext *);
74  extern int32_t     decSingleGetCoefficient(const decSingle *, uint8_t *);
75  extern int32_t     decSingleGetExponent(const decSingle *);
76  extern decSingle * decSingleSetCoefficient(decSingle *, const uint8_t *, int32_t);
77  extern decSingle * decSingleSetExponent(decSingle *, decContext *, int32_t);
78  extern void	     decSingleShow(const decSingle *, const char *);
79  extern int32_t     decSingleToBCD(const decSingle *, int32_t *, uint8_t *);
80  extern char	   * decSingleToEngString(const decSingle *, char *);
81  extern int32_t     decSingleToPacked(const decSingle *, int32_t *, uint8_t *);
82  extern char	   * decSingleToString(const decSingle *, char *);
83  extern decDouble * decSingleToWider(const decSingle *, decDouble *);
84  extern decSingle * decSingleZero(decSingle *);
85
86  /* (No Arithmetic routines for decSingle) */
87
88  /* Non-computational */
89  extern uint32_t     decSingleRadix(const decSingle *);
90  extern const char * decSingleVersion(void);
91
92  /* decNumber conversions; these are implemented as macros so as not  */
93  /* to force a dependency on decimal32 and decNumber in decSingle.    */
94  /* decSingleFromNumber returns a decimal32 * to avoid warnings.      */
95  #define decSingleToNumber(dq, dn) decimal32ToNumber((decimal32 *)(dq), dn)
96  #define decSingleFromNumber(dq, dn, set) decimal32FromNumber((decimal32 *)(dq), dn, set)
97
98#endif
99