Problems with printing double-values with printf and sprintf

[Joel Sherrill]

Ralf Corsepius wrote:
> On 09/04/2009 04:50 PM, Sebastian Huber wrote:
>   
>> The calculation in dtoa.c line 295 is wrong because the values for Exp_shift1
>> and Exp_mask are invalid for the little endian ARM (this is only a good guess
>> at the moment).
>>     
> OK, something to investigate.
>
> But, I guess you know that the arm is very special wrt. float formats?
> c.f. the arm-clause in newlib/libc/include/machine/ieeefp.h
>
> Could it be yours is one of the "special kind"?
>
>   
>>    Exp_shift1 has the value 20 and should have the value 23.
>> These values are defined in
>>
>> ./newlib/libc/stdio/vfieeefp.h
>> ./newlib/libc/stdlib/mprec.h
>>
>> It looks like the __IEEE_LITTLE_ENDIAN is undefined.
>>    
>>     
> Code example with corresponding compiler call, please.
>
>   
Just so it ends up in the email archives. On IRC, I
asked him to check the cpp predefines when
his CPU model is selected.

arm-rtems4.10-gcc -dM -E -mXXX - </dev/null

Those settings must be right and then ieeefp.h
and friends have to interpret that combination
correctly. 

Very likely just a subtle conditional compilation
error in newlib.
> Ralf
>
>
> _______________________________________________
> rtems-users mailing list
> rtems-users at rtems.org
> http://www.rtems.org/mailman/listinfo/rtems-users
>   


-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel.sherrill at OARcorp.com        On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985