Target FP: Use target format throughout expression parsing

[deliverable/binutils-gdb.git] / gdb / doublest.h

diff --git a/gdb/doublest.h b/gdb/doublest.h
index 1ebefd813082f05efa913c348c20061335105115..4b9d6bcbc916589526172ff2338dc900c0698de8 100644 (file)
--- a/gdb/doublest.h
+++ b/gdb/doublest.h
@@ -1,14 +1,12 @@
 /* Floating point definitions for GDB.
 
-   Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
-   1996, 1997, 1998, 1999, 2000, 2001, 2003, 2005, 2006
-   Free Software Foundation, Inc.
+   Copyright (C) 1986-2017 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program 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 of the License, or
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -17,9 +15,7 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef DOUBLEST_H
 #define DOUBLEST_H
@@ -27,18 +23,6 @@
 struct type;
 struct floatformat;
 
-/* Setup definitions for host and target floating point formats.  We need to
-   consider the format for `float', `double', and `long double' for both target
-   and host.  We need to do this so that we know what kind of conversions need
-   to be done when converting target numbers to and from the hosts DOUBLEST
-   data type.  */
-
-/* This is used to indicate that we don't know the format of the floating point
-   number.  Typically, this is useful for native ports, where the actual format
-   is irrelevant, since no conversions will be taking place.  */
-
-#include "floatformat.h"       /* For struct floatformat */
-
 /* Use `long double' if the host compiler supports it.  (Note that this is not
    necessarily any longer than `double'.  On SunOS/gcc, it's the same as
    double.)  This is necessary because GDB internally converts all floating
@@ -51,12 +35,12 @@ struct floatformat;
 #if (defined HAVE_LONG_DOUBLE && defined PRINTF_HAS_LONG_DOUBLE \
      && defined SCANF_HAS_LONG_DOUBLE)
 typedef long double DOUBLEST;
-# define DOUBLEST_PRINT_FORMAT "%Lg"
-# define DOUBLEST_SCAN_FORMAT "%Lg"
+# define DOUBLEST_PRINT_FORMAT "Lg"
+# define DOUBLEST_SCAN_FORMAT "Lg"
 #else
 typedef double DOUBLEST;
-# define DOUBLEST_PRINT_FORMAT "%g"
-# define DOUBLEST_SCAN_FORMAT "%lg"
+# define DOUBLEST_PRINT_FORMAT "g"
+# define DOUBLEST_SCAN_FORMAT "lg"
 /* If we can't scan or print long double, we don't want to use it
    anywhere.  */
 # undef HAVE_LONG_DOUBLE
@@ -64,6 +48,17 @@ typedef double DOUBLEST;
 # undef SCANF_HAS_LONG_DOUBLE
 #endif
 
+/* Different kinds of floatformat numbers recognized by
+   floatformat_classify.  To avoid portability issues, we use local
+   values instead of the C99 macros (FP_NAN et cetera).  */
+enum float_kind {
+  float_nan,
+  float_infinite,
+  float_zero,
+  float_normal,
+  float_subnormal
+};
+
 extern void floatformat_to_doublest (const struct floatformat *,
                                     const void *in, DOUBLEST *out);
 extern void floatformat_from_doublest (const struct floatformat *,
@@ -71,26 +66,20 @@ extern void floatformat_from_doublest (const struct floatformat *,
 
 extern int floatformat_is_negative (const struct floatformat *,
                                    const bfd_byte *);
-extern int floatformat_is_nan (const struct floatformat *, const bfd_byte *);
+extern enum float_kind floatformat_classify (const struct floatformat *,
+                                            const bfd_byte *);
 extern const char *floatformat_mantissa (const struct floatformat *,
                                         const bfd_byte *);
 
-/* These functions have been replaced by extract_typed_floating and
-   store_typed_floating.
+extern std::string floatformat_to_string (const struct floatformat *fmt,
+                                         const gdb_byte *in,
+                                         const char *format = nullptr);
+extern bool floatformat_from_string (const struct floatformat *fmt,
+                                    gdb_byte *out, const std::string &in);
 
-   Most calls are passing in TYPE_LENGTH (TYPE) so can be changed to
-   just pass the TYPE.  The remainder pass in the length of a
-   register, those calls should instead pass in the floating point
-   type that corresponds to that length.  */
+/* Return the floatformat's total size in host bytes.  */
 
-extern DOUBLEST deprecated_extract_floating (const void *addr, int len);
-extern void deprecated_store_floating (void *addr, int len, DOUBLEST val);
-
-/* Given TYPE, return its floatformat.  TYPE_FLOATFORMAT() may return
-   NULL.  type_floatformat() detects that and returns a floatformat
-   based on the type size when FLOATFORMAT is NULL.  */
-
-const struct floatformat *floatformat_from_type (const struct type *type);
+extern size_t floatformat_totalsize_bytes (const struct floatformat *fmt);
 
 extern DOUBLEST extract_typed_floating (const void *addr,
                                        const struct type *type);
@@ -100,11 +89,4 @@ extern void convert_typed_floating (const void *from,
                                    const struct type *from_type,
                                     void *to, const struct type *to_type);
 
-/* Table of convenient float-formats.  */
-extern const struct floatformat *floatformat_ieee_single[BFD_ENDIAN_UNKNOWN];
-extern const struct floatformat *floatformat_ieee_double[BFD_ENDIAN_UNKNOWN];
-extern const struct floatformat *floatformat_ieee_quad[BFD_ENDIAN_UNKNOWN];
-extern const struct floatformat *floatformat_arm_ext[BFD_ENDIAN_UNKNOWN];
-extern const struct floatformat *floatformat_ia64_spill[BFD_ENDIAN_UNKNOWN];
-
 #endif