This is the mail archive of the ecos-discuss@sourceware.org mailing list for the eCos project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

[Fwd: printf and floating point emulation]


I found that the problem is the function vfnprint () located in vfnprintf.cxx. It calls cvt() and this function calls modf(). This last function seems to be the problem. This is the code extracted from cvt() :
...
for (p = endp - 1; integer; ++expcnt) {
tmp = modf(integer / 10, &integer);
*p-- = to_char((int)((tmp + .01) * 10));
}
...


This loop never ends!

Am I omiting any patch? Please I need help. If you have any suggestion write me as soon as you can.
Regards,
Eduardo



-------- Mensaje original -------- Asunto: [ECOS] printf and floating point emulation Fecha: Tue, 08 Apr 2008 16:55:09 -0300 De: Eduardo Sabaj <esabaj@hasar.com> Para: ecos-discuss@ecos.sourceware.org



I have a program that hangs when trying to format and print something like this:

void
func (float f)
{
  printf ("%.2f\n", f);
}

I don't have an FPU builtin hardware.
The CPPFLAGS and LDFLAGS include the following options:

-msoft-float -mno-fp-ret-in-387 -mno-fancy-math-387

I disabled the FPU support (macro CYGHWR_HAL_I386_FPU) and I enabled CYGSEM_LIBC_STDIO_PRINTF_FLOATING_POINT and CYGSEM_LIBC_STDIO_SCANF_FLOATING_POINT macros.

I'm running ecos-2.0 (the last version available in CVS).

Please, I cannot realize what I'm omiting.. Any idea?

--

Ing. Eduardo Salvador Sabaj
Analista de Desarrollo

Compañía Hasar | Grupo Hasar*
*Marcos Sastre y José Ingenieros
El Talar. Pacheco
[B1618CSD] Buenos Aires. Argentina
Tel [54 11] 4117 8900 | Fax [54 11] 4117 8998
E-mail: esabaj@hasar.com
Visítenos en: www.hasar.com
<http://www.hasar.com>Información legal y política de confidencialidad: www.grupohasar.com/disclaimer <http://www.grupohasar.com/disclaimer>



-- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss




<http://www.grupohasar.com/disclaimer>



-- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]