On Tuesday, 25 August 2015 at 21:21:59 UTC, Matthias Bentrup
wrote:
On Tuesday, 25 August 2015 at 15:19:41 UTC, Márcio Martins
wrote:
If you compile it with *GDC* it works fine. If you compile a
port with clang, gcc or msvc, it works right as well. I
suspect it will also work fine with LDC.
The same program "fails" in gcc too, if you use x87 math.
Usually C compilers allow excess precision for intermediate
results, because the extra precision seldom hurts and changing
precision on x87 is very expensive (depends on the CPU, but it
is more expensive than the trigonometric functions on some
models).
That's because of floating point exception. It is very
constraining for the hardware.
