Johns release

gdb/ieee-float.h

@@ -0,0 +1,66 @@
+/* IEEE floating point support declarations, for GDB, the GNU Debugger.
+   Copyright (C) 1991 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Parameters for extended float format:  */
+
+struct ext_format {
+  unsigned totalsize;		/* Total size of extended number */
+  unsigned signbyte;		/* Byte number of sign bit */
+  unsigned char signmask;	/* Mask for sign bit */
+  unsigned expbyte_h;		/* High byte of exponent */
+  unsigned expbyte_l;		/* Low  byte of exponent */
+  unsigned manbyte_h;		/* High byte of mantissa */
+  unsigned manbyte_l;		/* Low  byte of mantissa */
+};
+
+#define	TOTALSIZE	ext_format->totalsize
+#define	SIGNBYTE	ext_format->signbyte
+#define	SIGNMASK	ext_format->signmask
+#define EXPBYTE_H	ext_format->expbyte_h
+#define EXPBYTE_L	ext_format->expbyte_l
+#define	MANBYTE_H	ext_format->manbyte_h
+#define	MANBYTE_L	ext_format->manbyte_l
+
+/* Actual ext_format structs for various machines are in the *-tdep.c file
+   for each machine.  */
+
+#define	EXT_EXP_NAN	0x7FFF	/* Exponent value that indicates NaN */
+#define	EXT_EXP_BIAS	0x3FFF	/* Amount added to "true" exponent for ext */
+#define	DBL_EXP_BIAS	 0x3FF	/* Ditto, for doubles */
+
+/* Convert an IEEE extended float to a double.
+   FROM is the address of the extended float.
+   Store the double in *TO.  */
+
+extern void
+ieee_extended_to_double (
+#ifdef __STDC__
+	struct ext_format *ext_format, char *from, double *to
+#endif
+);
+
+/* The converse: convert the double *FROM to an extended float
+   and store where TO points.  */
+
+void
+double_to_ieee_extended (
+#ifdef __STDC__
+	struct ext_format *ext_format, double *from, char *to
+#endif
+);