X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=include%2Ffloatformat.h;h=b5951644ea5108b93a5a935d33cd4ba3bba1cec4;hb=dd283eda9d9d3ef03208ad21f5bbf378463fd2f0;hp=feb3260117c495348b51817e4bc2f0837f36a060;hpb=6b450f1e50c69c5538f858cdf9f82f8e5b696766;p=pf3gnuchains%2Fgcc-fork.git

diff --git a/include/floatformat.h b/include/floatformat.h
index feb3260117c..b5951644ea5 100644
--- a/include/floatformat.h
+++ b/include/floatformat.h
@@ -1,5 +1,6 @@
 /* IEEE floating point support declarations, for GDB, the GNU Debugger.
-   Copyright 1991, 1994, 1995, 1997, 2000, 2003 Free Software Foundation, Inc.
+   Copyright 1991, 1994, 1995, 1997, 2000, 2003, 2005, 2010
+   Free Software Foundation, Inc.
 
 This file is part of GDB.
 
@@ -15,7 +16,7 @@ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
 
 #if !defined (FLOATFORMAT_H)
 #define FLOATFORMAT_H 1
@@ -28,25 +29,26 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
    (i.e. BITS_BIG_ENDIAN type numbering), and specify which bits each field
    contains with the *_start and *_len fields.  */
 
-/* What is the order of the bytes. */
+/* What is the order of the bytes?  */
 
 enum floatformat_byteorders {
-
   /* Standard little endian byte order.
      EX: 1.2345678e10 => 00 00 80 c5 e0 fe 06 42 */
-
   floatformat_little,
 
   /* Standard big endian byte order.
      EX: 1.2345678e10 => 42 06 fe e0 c5 80 00 00 */
-
   floatformat_big,
 
   /* Little endian byte order but big endian word order.
      EX: 1.2345678e10 => e0 fe 06 42 00 00 80 c5 */
+  floatformat_littlebyte_bigword,
 
-  floatformat_littlebyte_bigword
-
+  /* VAX byte order.  Little endian byte order with 16-bit words.  The
+     following example is an illustration of the byte order only; VAX
+     doesn't have a fully IEEE compliant floating-point format.
+     EX: 1.2345678e10 => 80 c5 00 00 06 42 e0 fe */
+  floatformat_vax
 };
 
 enum floatformat_intbit { floatformat_intbit_yes, floatformat_intbit_no };
@@ -61,8 +63,12 @@ struct floatformat
 
   unsigned int exp_start;
   unsigned int exp_len;
-  /* Amount added to "true" exponent.  0x3fff for many IEEE extendeds.  */
-  unsigned int exp_bias;
+  /* Bias added to a "true" exponent to form the biased exponent.  It
+     is intentionally signed as, otherwize, -exp_bias can turn into a
+     very large number (e.g., given the exp_bias of 0x3fff and a 64
+     bit long, the equation (long)(1 - exp_bias) evaluates to
+     4294950914) instead of -16382).  */
+  int exp_bias;
   /* Exponent value which indicates NaN.  This is the actual value stored in
      the float, not adjusted by the exp_bias.  This usually consists of all
      one bits.  */
@@ -76,10 +82,22 @@ struct floatformat
 
   /* Internal name for debugging. */
   const char *name;
+
+  /* Validator method.  */
+  int (*is_valid) (const struct floatformat *fmt, const void *from);
+
+  /* Is the format actually the sum of two smaller floating point
+     formats (IBM long double, as described in
+     gcc/config/rs6000/darwin-ldouble-format)?  If so, this is the
+     smaller format in question, and the fields sign_start through
+     intbit describe the first half.  If not, this is NULL.  */
+  const struct floatformat *split_half;
 };
 
 /* floatformats for IEEE single and double, big and little endian.  */
 
+extern const struct floatformat floatformat_ieee_half_big;
+extern const struct floatformat floatformat_ieee_half_little;
 extern const struct floatformat floatformat_ieee_single_big;
 extern const struct floatformat floatformat_ieee_single_little;
 extern const struct floatformat floatformat_ieee_double_big;
@@ -89,6 +107,12 @@ extern const struct floatformat floatformat_ieee_double_little;
 
 extern const struct floatformat floatformat_ieee_double_littlebyte_bigword;
 
+/* floatformats for VAX.  */
+
+extern const struct floatformat floatformat_vax_f;
+extern const struct floatformat floatformat_vax_d;
+extern const struct floatformat floatformat_vax_g;
+
 /* floatformats for various extendeds.  */
 
 extern const struct floatformat floatformat_i387_ext;
@@ -103,24 +127,25 @@ extern const struct floatformat floatformat_ia64_spill_big;
 extern const struct floatformat floatformat_ia64_spill_little;
 extern const struct floatformat floatformat_ia64_quad_big;
 extern const struct floatformat floatformat_ia64_quad_little;
+/* IBM long double (double+double).  */
+extern const struct floatformat floatformat_ibm_long_double;
 
 /* Convert from FMT to a double.
    FROM is the address of the extended float.
    Store the double in *TO.  */
 
 extern void
-floatformat_to_double PARAMS ((const struct floatformat *, char *, double *));
+floatformat_to_double (const struct floatformat *, const void *, double *);
 
 /* The converse: convert the double *FROM to FMT
    and store where TO points.  */
 
 extern void
-floatformat_from_double PARAMS ((const struct floatformat *,
-				 double *, char *));
+floatformat_from_double (const struct floatformat *, const double *, void *);
 
 /* Return non-zero iff the data at FROM is a valid number in format FMT.  */
 
 extern int
-floatformat_is_valid PARAMS ((const struct floatformat *fmt, char *from));
+floatformat_is_valid (const struct floatformat *fmt, const void *from);
 
 #endif	/* defined (FLOATFORMAT_H) */