/* Floating point routines for GDB, the GNU debugger.
- Copyright (C) 2017-2018 Free Software Foundation, Inc.
+ Copyright (C) 2017-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbtypes.h"
#include "floatformat.h"
#include "target-float.h"
-
+#include "gdbarch.h"
/* Target floating-point operations.
{
T host_float;
from_target (type, addr, &host_float);
- /* Converting an out-of-range value is undefined behavior in C, but we
- prefer to return a defined value here. */
- if (host_float > std::numeric_limits<LONGEST>::max())
- return std::numeric_limits<LONGEST>::max();
- if (host_float < std::numeric_limits<LONGEST>::min())
+ T min_possible_range = static_cast<T>(std::numeric_limits<LONGEST>::min());
+ T max_possible_range = -min_possible_range;
+ /* host_float can be converted to an integer as long as it's in
+ the range [min_possible_range, max_possible_range). If not, it is either
+ too large, or too small, or is NaN; in this case return the maximum or
+ minimum possible value. */
+ if (host_float < max_possible_range && host_float >= min_possible_range)
+ return static_cast<LONGEST> (host_float);
+ if (host_float < min_possible_range)
return std::numeric_limits<LONGEST>::min();
- return (LONGEST) host_float;
+ /* This line will be executed if host_float is NaN. */
+ return std::numeric_limits<LONGEST>::max();
}
/* Convert signed integer VAL to a target floating-number of type TYPE