[lkml]   [2002]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: floating point exception
On Tue, 15 Jan 2002, Zwane Mwaikambo wrote:

> On 14 Jan 2002, Christian Thalinger wrote:
> > It seems the floating point exception is only raised with a new data
> > package. Is there a simple way to raise such a exception?
> New data package? And does the same behaviour re-occur after the fpu
> exception? ie programs start segfaulting etc. Can you try doing a "dmesg"
> after the segfaults and fpu exception and see if there is anything in the
> kernel ring buffer too.
> Regards,
> Zwane Mwaikambo

This will allow you to generate some math-errors and see if everything
works okay. By default, upon process creation, math errors like
/0 are masked.

* Note FPU control only exists per process. Therefore, you have
* to set up the FPU before you use it in any program.
#include <i386/fpu_control.h>

#define FPU_MASK (_FPU_MASK_IM |\

void fpu()
__setfpucw(_FPU_DEFAULT & ~FPU_MASK);

main() {
double zero=0.0;
double one=1.0;

one /=zero;

Dick Johnson

Penguin : Linux version 2.4.1 on an i686 machine (797.90 BogoMips).

I was going to compile a list of innovations that could be
attributed to Microsoft. Once I realized that Ctrl-Alt-Del
was handled in the BIOS, I found that there aren't any.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:23    [W:0.123 / U:1.752 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site