www.digitalmars.com         C & C++   DMDScript  

D - Numerical Analyst as Curmudgeon

reply Mark Evans <Mark_member pathlink.com> writes:
"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
Feb 08 2003
parent reply "Walter" <walter digitalmars.com> writes:
"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







I did read Prof. Kahan's papers in designing D <g>.
Feb 09 2003
parent reply "Roberto Mariottini" <rmariottini lycosmail.com> writes:
"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
Feb 10 2003
parent reply "Walter" <walter digitalmars.com> writes:
"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.
Feb 10 2003
parent reply "Roberto Mariottini" <rmariottini lycosmail.com> writes:
"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
Feb 14 2003
parent "Walter" <walter digitalmars.com> writes:
"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.
Feb 14 2003