Re^2: Insights sought into floating point division strangeness

This is my setup (5.8.7 on NetBSD):
Summary of my perl5 (revision 5 version 8 subversion 7) configuration:
  Platform:
    osname=netbsd, osvers=3.0_stable, archname=i386-netbsd-thread-mult
+i
    uname='netbsd tll.i 3.0_stable netbsd 3.0_stable (_acpi_) #0: sat 
+dec 31 19:02:04 gmt 2005 root@tll.i:varobji386filesnetbsd3sysarchi386
+compile_acpi_ i386
 '
    config_args='-sde -Darchname=i386-netbsd -Dcc=cc -Doptimize=-O2 -p
+ipe -march=pentium2 -mcpu=athlon-xp -finline-functions -ffast-math -f
+omit-frame-pointer
 -pthread -I/usr/include -Duseshrplib -Ui_malloc -Uusemymalloc -Uinsta
+llusrbinperl -Dinstallstyle=lib/perl5 -Dprefix=/usr/pkg -Dsiteprefix=
+/usr/pkg -Dvendorp
refix=/usr/pkg -Dscriptdir=/usr/pkg/lib/perl5/bin -Dsitescript=/usr/pk
+g/lib/perl5/site_perl/bin -Dvendorscript=/usr/pkg/lib/perl5/vendor_pe
+rl/bin -Dprivlib=/
usr/pkg/lib/perl5/5.8.0 -Dsitelib=/usr/pkg/lib/perl5/site_perl/5.8.0 -
+Dvendorlib=/usr/pkg/lib/perl5/vendor_perl/5.8.0 -Dman1ext=1 -Dman1dir
+=/usr/pkg/lib/perl
5/man/man1 -Dsiteman1dir=/usr/pkg/lib/perl5/site_perl/man/man1 -Dvendo
+rman1dir=/usr/pkg/lib/perl5/vendor_perl/man/man1 -Dman3ext=3 -Dman3di
+r=/usr/pkg/lib/per
l5/man/man3 -Dsiteman3dir=/usr/pkg/lib/perl5/site_perl/man/man3 -Dvend
+orman3dir=/usr/pkg/lib/perl5/vendor_perl/man/man3 -Daphostname=/bin/h
+ostname -Dln=/bin/
ln -Dsed=/usr/bin/sed -Dissymlink=test -h -Duseithreads -Dlibswanted=m
+ crypt '
    hint=recommended, useposix=true, d_sigaction=define
    usethreads=define use5005threads=undef useithreads=define usemulti
+plicity=define
    useperlio=define d_sfio=undef uselargefiles=define usesocks=undef
    use64bitint=undef use64bitall=undef uselongdouble=undef
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fno-strict-aliasing -pipe -I/usr/pkg/include',
    optimize='-O2 -pipe -march=pentium2 -mcpu=athlon-xp -finline-funct
+ions -ffast-math -fomit-frame-pointer -pthread -I/usr/include',
    cppflags='-fno-strict-aliasing -pipe -I/usr/pkg/include'
    ccversion='', gccversion='3.3.3 (NetBSD nb3 20040520)', gccosandve
+rs=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=1234
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+2
    ivtype='long', ivsize=4, nvtype='double', nvsize=8, Off_t='off_t',
+ lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='cc', ldflags ='-Wl,-R/usr/pkg/lib  -L/usr/pkg/lib'
    libpth=/usr/lib /usr/pkg/lib
    libs=-lm -lcrypt -lpthread
    perllibs=-lm -lcrypt -lpthread
    libc=/lib/libc.so, so=so, useshrplib=true, libperl=libperl.so
    gnulibc_version=''
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E  
+-Wl,-R/usr/pkg/lib/perl5/5.8.0/i386-netbsd-thread-multi/CORE'
    cccdlflags='-DPIC -fPIC ', lddlflags='-Wl,-R/usr/pkg/lib --whole-a
+rchive -shared  -L/usr/pkg/lib'


Characteristics of this binary (from libperl):
  Compile-time options: MULTIPLICITY USE_ITHREADS USE_LARGE_FILES
                        PERL_IMPLICIT_CONTEXT
  Built under netbsd
  Compiled at Jan  8 2006 14:03:19
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