* libdecnumber: Import decNumber sources from the dfp-branch.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@107629 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 107 insertions, 0 deletions

diff --git a/libdecnumber/decimal64.h b/libdecnumber/decimal64.h
new file mode 100644
index 00000000000..a282df1e86e
--- /dev/null
+++ b/libdecnumber/decimal64.h
@@ -0,0 +1,107 @@
+/* Decimal 64-bit format 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.
+
+   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, 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+#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 */
+
+#if defined(DECIMAL32)
+#error decimal64.h must precede decimal32.h for correct DECNUMDIGITS
+#endif
+
+  /* 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 */
+  /* highest biased exponent (Elimit-1) */
+#define DECIMAL64_Ehigh  (DECIMAL64_Emax+DECIMAL64_Bias-DECIMAL64_Pmax+1)
+
+#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
+
+  /* Macros for accessing decimal64 fields.  These assume the argument
+     is a reference (pointer) to the decimal64 structure */
+  /* Get sign */
+#define decimal64Sign(d)       ((unsigned)(d)->bytes[0]>>7)
+
+  /* Get combination field */
+#define decimal64Comb(d)       (((d)->bytes[0] & 0x7c)>>2)
+
+  /* Get exponent continuation [does not remove bias] */
+#define decimal64ExpCon(d)     ((((d)->bytes[0] & 0x03)<<6)         \
+                               | ((unsigned)(d)->bytes[1]>>2))
+
+  /* Set sign [this assumes sign previously 0] */
+#define decimal64SetSign(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 decimal64SetExpCon(d, e) {                                  \
+    (d)->bytes[0]|=(uint8_t)((e)>>6);                                 \
+    (d)->bytes[1]|=(uint8_t)(((e)&0x3F)<<2);}
+
+  /* ------------------------------------------------------------------ */
+  /* Routines                                                           */
+  /* ------------------------------------------------------------------ */
+
+#ifdef IN_LIBGCC2
+#define decimal64FromString __decimal64FromString
+#define decimal64ToString __decimal64ToString
+#define decimal64ToEngString __decimal64ToEngString
+#define decimal64FromNumber __decimal64FromNumber
+#define decimal64ToNumber __decimal64ToNumber
+#endif
+
+  /* String conversions */
+decimal64 *decimal64FromString (decimal64 *, char *, decContext *);
+char *decimal64ToString (decimal64 *, char *);
+char *decimal64ToEngString (decimal64 *, char *);
+
+  /* decNumber conversions */
+decimal64 *decimal64FromNumber (decimal64 *, decNumber *, decContext *);
+decNumber *decimal64ToNumber (decimal64 *, decNumber *);
+
+#endif