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Description of problem:
The function erfc aborts on some double-precision value (for example 27.E0 or 28.E0).  
For these values, erfc should return a small value 
With gdb , I see that erfc calls abort function. 
This problem only occurs on ia64 architecture. On x86 or x86_64, there is no problem.




Version-Release number of selected component (if applicable):
glibc-2.3.4-2.9

How reproducible:
Always

Steps to Reproduce:
1. create the following source file bug100805.c
#include <math.h>

double f(double x)
{
 return erfc(x);
}

int main(int argc)
{
 double d=27.E0*argc;
 double q;
 printf("d=%g\n",d);
 q=f(d);
 printf("q=%g\n", q);
 printf("end\n");
 
}

2. compile the code :
 gcc bug100805.c -o bug -lm
3. execute the program :
 ./bug


Actual Results:  d=27
Aborted


Expected Results:  it should print q with a denormalized number or the value 0.
example :
d=27
q=5.23705e-319
end
 

Additional info:

[xxx tmp]$ gcc -v 
Reading specs from /usr/lib/gcc/ia64-redhat-linux/3.4.3/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --
enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit 
--disable-libunwind-exceptions --enable-java-awt=gtk --host=ia64-redhat-linux
Thread model: posix

[xxx tmp]$ gdb ./bug
GNU gdb Red Hat Linux (6.3.0.0-0.31rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "ia64-redhat-linux-gnu"...(no debugging symbols found)
Using host libthread_db library "/lib/tls/libthread_db.so.1".

(gdb) run
Starting program: /users/gastin/tmp/bug 
Failed to read a valid object file image from memory.
(no debugging symbols found)
(no debugging symbols found)
(no debugging symbols found)
d=27

Program received signal SIGABRT, Aborted.
0xa000000000010641 in ?? ()
(gdb) bt
#0  0xa000000000010641 in ?? ()
#1  0x200000000016b2b0 in raise () from /lib/tls/libc.so.6.1
#2  0x200000000016db70 in abort () from /lib/tls/libc.so.6.1
#3  0x20000000000ac5b0 in __libm_error_support () from /lib/tls/libm.so.6.1
#4  0x20000000000aad80 in __libm_error_region () from /lib/tls/libm.so.6.1
#5  0x40000000000007b0 in f ()
#6  0x40000000000008d0 in main ()
(gdb)