IEEE exception status flags
These flags indicate that an exceptional floating-point condition has occured.
They indicate that a NaN or an infinity has been generated, that a result
is inexact, or that a signalling NaN has been encountered.
The return values of the properties should be treated as booleans, although
each is returned as an int, for speed.
Example:
real a=3.5;
// Set all the flags to zero
resetIeeeFlags();
assert(!ieeeFlags.divByZero);
// Perform a division by zero.
a/=0.0L;
assert(a==real.infinity);
assert(ieeeFlags.divByZero);
// Create a NaN
a*=0.0L;
assert(ieeeFlags.invalid);
assert(isNaN(a));
// Check that calling func() has no effect on the
// status flags.
IeeeFlags f = ieeeFlags;
func();
assert(ieeeFlags == f);
- @property int inexact();
- The result cannot be represented exactly, so rounding occured.
(example: x = sin(0.1); }
- @property int underflow();
- A zero was generated by underflow (example: x = real.min*real.epsilon/2;)
- @property int overflow();
- An infinity was generated by overflow (example: x = real.max*2;)
- @property int divByZero();
- An infinity was generated by division by zero (example: x = 3/0.0; )
- @property int invalid();
- A machine NaN was generated. (example: x = real.infinity * 0.0; )