"Java, and Microsoft’s compilers with Windows NT, 2000 and XP are dangerous to use for floating-point computation."

http://www.cs.berkeley.edu/~wkahan/Curmudge.pdf

"Mark Evans" <Mark_member@pathlink.com> wrote in message news:b24bf9$1hn9$1@digitaldaemon.com...
> "Java, and Microsoft's compilers with Windows NT, 2000 and XP are
dangerous to
> use for floating-point computation."
>
> http://www.cs.berkeley.edu/~wkahan/Curmudge.pdf


Digital Mars C/C++/D do not suffer from his complaints #1 (because imaginary types are fully implemented) and #2 (because full 80 bit precision is used), but do with #3 because that's the way the language is defined.

I did read Prof. Kahan's papers in designing D <g>.

"Walter" <walter@digitalmars.com> ha scritto nel messaggio
news:b2589r$1vrl$1@digitaldaemon.com...
[...]
>
> I did read Prof. Kahan's papers in designing D <g>.
>

And what about what IEEE 754 calls a " Trap" ?

http://www.cs.berkeley.edu/~wkahan/JAVAhurt.pdf page 20-25?

Ciao

"Roberto Mariottini" <rmariottini@lycosmail.com> wrote in message news:b2a95j$g9e$1@digitaldaemon.com...
>
> "Walter" <walter@digitalmars.com> ha scritto nel messaggio
> news:b2589r$1vrl$1@digitaldaemon.com...
> [...]
> >
> > I did read Prof. Kahan's papers in designing D <g>.
> >
>
> And what about what IEEE 754 calls a " Trap" ?
>
> http://www.cs.berkeley.edu/~wkahan/JAVAhurt.pdf page 20-25?

D sets the FPU in a mode where it accumulates exception flags, and the programmer can decide when and where to inspect them.

"Walter" <walter@digitalmars.com> ha scritto nel messaggio news:b2aaeu$gpe$3@digitaldaemon.com...
>
> D sets the FPU in a mode where it accumulates exception flags, and the programmer can decide when and where to inspect them.

In http://www.digitalmars.com/d/float.html it's stated that the D Language should do that. But I can't understand the "[blah, blah, blah]" part :-)

Surely I think that a Trap should raise an exception, or a library function can be called to set the runtime in a throw-an-exception mode.

Ciao

"Roberto Mariottini" <rmariottini@lycosmail.com> wrote in message news:b2ieom$reu$1@digitaldaemon.com...
> "Walter" <walter@digitalmars.com> ha scritto nel messaggio news:b2aaeu$gpe$3@digitaldaemon.com...
> > D sets the FPU in a mode where it accumulates exception flags, and the programmer can decide when and where to inspect them.
> In http://www.digitalmars.com/d/float.html it's stated that the D Language should do that. But I can't understand the "[blah, blah, blah]" part :-)

Get the new Opera "bork" browser, that should provide a ready translation. <g>

> Surely I think that a Trap should raise an exception, or a library
function
> can be called to set the runtime in a throw-an-exception mode.

I think experience in C has shown this to be a less than useful feature. Setting the sticky flags in the FPU seems to be much more practical.