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Subject: alpha/12623: strtod(3) FPE on alphaev56  
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>Number:         12623
>Category:       alpha
>Synopsis:       Certain valid numeric strings cause a SIGFPE when attempting
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-alpha
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jul 13 04:30:00 PDT 1999
>Closed-Date:
>Last-Modified:
>Originator:     Matthew Seaman
>Release:        FreeBSD 3.2-STABLE alpha
>Organization:
Inpharmatica Ltd
>Environment:

	b0:/tmp:% uname -a 
FreeBSD b0.farm.inpharmatica.co.uk 3.2-STABLE FreeBSD 3.2-STABLE #0: Thu Jul  8 09:04:16 BST 1999     matthew@b0.farm.inpharmatica.co.uk:/usr/src/sys/compile/FARM  alpha


>Description:

Attempting to convert the string "2.49521e-297" into a double
precision value via strtod(3) results in a floating point exception on
the alphaev56 CPU.  The problem doesn't occur on i586.

The problem is sensitive to both the mantissa and exponent of the
number: the following values are known to trigger the bug:

2.49521e-297
3.35554e-295
1.14662e-292
1.14e-293
2.495e-293
2.49e-294
2.4e-293
1e-305

whereas these do not:

2.4e-292
2.49521e-292
2.4951e-293
1.14e-292
1.15e-293

>How-To-Repeat:

#include <stdlib.h>

int
main (int argc, char *argv[])
{
  char str[32] = "2.49521e-297";
  double num;

  num = strtod (str, NULL);
}


>Fix:
	
not known




>Release-Note:
>Audit-Trail:
>Unformatted:
 		 to convert to double 


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