1 files changed, 62 insertions, 0 deletions
diff --git a/gdb/target-float.c b/gdb/target-float.c
new file mode 100644
index 0000000..a082b9c
--- /dev/null
+++ b/gdb/target-float.c
@@ -0,0 +1,62 @@
+/* Floating point routines for GDB, the GNU debugger.
+
+   Copyright (C) 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 3 of the License, or
+   (at your option) any later version.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "dfp.h"
+#include "doublest.h"
+#include "gdbtypes.h"
+#include "floatformat.h"
+#include "target-float.h"
+
+
+/* Typed floating-point routines.  These routines operate on floating-point
+   values in target format, represented by a byte buffer interpreted as a
+   "struct type", which may be either a binary or decimal floating-point
+   type (TYPE_CODE_FLT or TYPE_CODE_DECFLOAT).  */
+
+/* Return whether the byte-stream ADDR holds a valid value of
+   floating-point type TYPE.  */
+bool
+target_float_is_valid (const gdb_byte *addr, const struct type *type)
+{
+  if (TYPE_CODE (type) == TYPE_CODE_FLT)
+    return floatformat_is_valid (floatformat_from_type (type), addr);
+
+  if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
+    return true;
+
+  gdb_assert_not_reached ("unexpected type code");
+}
+
+/* Return whether the byte-stream ADDR, interpreted as floating-point
+   type TYPE, is numerically equal to zero (of either sign).  */
+bool
+target_float_is_zero (const gdb_byte *addr, const struct type *type)
+{
+  if (TYPE_CODE (type) == TYPE_CODE_FLT)
+    return (floatformat_classify (floatformat_from_type (type), addr)
+	    == float_zero);
+
+  if (TYPE_CODE (type) == TYPE_CODE_DECFLOAT)
+    return decimal_is_zero (addr, TYPE_LENGTH (type),
+			    gdbarch_byte_order (get_type_arch (type)));
+
+  gdb_assert_not_reached ("unexpected type code");
+}
+