Re: [Gcl-devel] Re: new and improved results.

[Camm Maguire]

OK, new attempt for you to try.  Please let me know!

Take care,

Dan Stanger <address@hidden> writes:

> Camm Maguire wrote:
> 
> > Greetings!
> >
> > address@hidden writes:
> >
> > > the awk fix for libbfd and libiberty is ok.
> >
> > great!
> >
> > > the test for awk isn't, you need to test for nawk first
> >
> > why?  If awk is not available, should then test for nawk.
> 
> Awk is broken on solaris, you must use nawk instead.
> 
> >
> >
> > > if you are on solaris, maybe a test for gawk before either
> > > of these is a good idea.
> >
> > ???  incompatibilities?
> 
> If someone goes thru the trouble of building free software or installing it,
> shouldn't we try to use it for political reasons?
> 
> >
> >
> > > second, isnormal is not defined on solaris, following
> >
> > isnormal is defined on posix systems under an extension, which is
> > turned on with the macro _GNU_SOURCE.  Obviously won't be there for
> > solaris, but maybe something analogous is?  This is the only sensible
> > way to distinguish between the least-normalized and least-unnormalized
> > float constants.  Although we might get by with !isnormal ==
> > fabs(f)<FLT_MIN.  Please dig for the equivalent test on your box, and
> > we can implement.
> >
> > For  the record, normailized floats have a mantissa and exponent, and
> > typically imply a hidden bit.  when the exponent is completely empty,
> > the mantissa alone implies an effective exponent which extends the
> > float range down to the unnormalized mon, losing precision gradually
> > along the way.
> >
> > Take care,
> >
> > > is a excerpt from the man page:
> > >
> > > man isnan
> > >
> > > C Library Functions                                     isnan(3C)
> > >
> > > NAME
> > >      isnan, isnand, isnanf, finite, fpclass, unordered  -  deter-
> > >      mine type of floating-point number
> > >
> > > SYNOPSIS
> > >      #include <ieeefp.h>
> > >
> > >      int isnand(double dsrc);
> > >
> > >      int isnanf(float fsrc);
> > >
> > >      int finite(double dsrc);
> > >
> > >      fpclass_t fpclass(double dsrc);
> > >
> > >      int unordered(double dsrc1, double dsrc2);
> > >
> > >      #include <math.h>
> > >
> > >      int isnan(double dsrc);
> > >
> > > DESCRIPTION
> > >      The  functionalty  of  isnan()  is  identical  to  that   of
> > >      isnand().
> > >
> > >      isnanf()  is  implemented  as  a  macro  included   in   the
> > >      <ieeefp.h> header.
> > >
> > >      fpclass() returns the class the dsrc  belongs  to.   The  10
> > >      possible classes are as follows:
> > >           FP_SNAN             signaling NaN
> > >           FP_QNAN             quiet NaN
> > >           FP_NINF             negative infinity
> > >           FP_PINF             positive infinity
> > >           FP_NDENORM          negative denormalized non-zero
> > >           FP_PDENORM          positive denormalized non-zero
> > >           FP_NZERO            negative zero
> > >           FP_PZERO            positive zero
> > >           FP_NNORM            negative normalized non-zero
> > >           FP_PNORM            positive normalized non-zero
> > >
> 
> Could we use
> #define isnormal(x) (fpclass(x) >= FP_NZERO)
> 
> In anycase it needs to be tested for in configure and defined where everything
> else is.
> 
> >
> > >      None of these routines generate any exception, even for sig-
> > >      naling NaNs.
> > >
> > > Is isnormal defined on linux, or is it a posix standard?
> > > Dan
> > >
> > >
> >
> > --
> > Camm Maguire                                            address@hidden
> > ==========================================================================
> > "The earth is but one country, and mankind its citizens."  --  Baha'u'llah
> >
> > _______________________________________________
> > Gcl-devel mailing list
> > address@hidden
> > http://mail.gnu.org/mailman/listinfo/gcl-devel
> 
> 
> 

-- 
Camm Maguire                                            address@hidden
==========================================================================
"The earth is but one country, and mankind its citizens."  --  Baha'u'llah