* 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, 103 insertions, 0 deletions

diff --git a/libdecnumber/decimal32.h b/libdecnumber/decimal32.h
new file mode 100644
index 00000000000..541858ed417
--- /dev/null
+++ b/libdecnumber/decimal32.h
@@ -0,0 +1,103 @@
+/* Decimal 32-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(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 */
+  /* highest biased exponent (Elimit-1) */
+#define DECIMAL32_Ehigh  (DECIMAL32_Emax+DECIMAL32_Bias-DECIMAL32_Pmax+1)
+
+#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
+
+  /* Macros for accessing decimal32 fields.  These assume the argument
+     is a reference (pointer) to the decimal32 structure */
+  /* 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);}
+
+  /* ------------------------------------------------------------------ */
+  /* Routines                                                           */
+  /* ------------------------------------------------------------------ */
+
+#ifdef IN_LIBGCC2
+#define decimal32FromString __decimal32FromString
+#define decimal32ToString __decimal32ToString
+#define decimal32ToEngString __decimal32ToEngString
+#define decimal32FromNumber __decimal32FromNumber
+#define decimal32ToNumber __decimal32ToNumber
+#endif
+
+/* String conversions.  */
+decimal32 *decimal32FromString (decimal32 *, char *, decContext *);
+char *decimal32ToString (decimal32 *, char *);
+char *decimal32ToEngString (decimal32 *, char *);
+
+/* decNumber conversions.  */
+decimal32 *decimal32FromNumber (decimal32 *, decNumber *, decContext *);
+decNumber *decimal32ToNumber (decimal32 *, decNumber *);
+
+#endif