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authorDaniel Jacobowitz <drow@false.org>2007-10-11 18:15:02 +0000
committerDaniel Jacobowitz <drow@false.org>2007-10-11 18:15:02 +0000
commitf5bc1778c3150f6e9364a1af81f3ba2658f9e68c (patch)
tree70a9ff23817fe9ed2dadc01f6fd3a179bb7d18b9 /libdecnumber/decSingle.h
parent607ae575a784d7d02956031883ae407faf06fd89 (diff)
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* src-release (GDB_SUPPORT_DIRS): Add libdecnumber.
* libdecnumber: New directory, imported from GCC.
Diffstat (limited to 'libdecnumber/decSingle.h')
-rw-r--r--libdecnumber/decSingle.h101
1 files changed, 101 insertions, 0 deletions
diff --git a/libdecnumber/decSingle.h b/libdecnumber/decSingle.h
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+/* 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 bytes */
+ typedef struct {
+ uint8_t bytes[DECSINGLE_Bytes]; /* fields: 1, 5, 6, 20 bits */
+ } 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