in reply to Re^3: How to find out if it is 32bit or 64bit windows?
in thread How to find out if it is 32bit or 64bit windows?

It baffled me too, but as long as it works, and all my wanted CPAN modules work on it, why would I doubt? (a little stripped:)

Linux 2.6.37.6-35-desktop/#1  HP EliteBook 8540p Core(TM) i5 CPU M 540
+ @ 2.53GHz/2534(4) i686  3843 Mb
openSUSE 11.4 "Celadon"

$ gcc -dumpversion
4.5
$ gcc --version
gcc (SUSE Linux) 4.5.1 20101208 [gcc-4_5-branch revision 167585]
$ perl -V:.*size
charsize='1';
doublesize='8';
fpossize='16';
gidsize='4';
i16size='2';
i32size='4';
i64size='8';
i8size='1';
intsize='4';
ivsize='8';
longdblsize='12';
longlongsize='8';
longsize='4';
lseeksize='8';
nvsize='12';
ptrsize='4';
shortsize='2';
sizesize='4';
u16size='2';
u32size='4';
u64size='8';
u8size='1';
uidsize='4';
uvsize='8';
$ perl -V (stripped)
Summary of my perl5 (revision 5 version 14 subversion 1) configuration
+:
  Platform:
    osname=linux, osvers=2.6.37.6-31-desktop, archname=i686-linux-64in
+t-ld
    config_args='-Duse64bitint -Duselongdouble -des'
    use64bitint=define, use64bitall=undef, uselongdouble=define
    cc='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector -I
+/pro/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2',
    cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/pro/loca
+l/include'
    ccversion='', gccversion='4.5.1 20101208 [gcc-4_5-branch revision 
+167585]', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=1
+2
    ivtype='long long', ivsize=8, nvtype='long double', nvsize=12, Off
+_t='off_t', lseeksize=8
    gnulibc_version='2.11.3'
Characteristics of this binary (from libperl):
  Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP
                        PERL_PRESERVE_IVUV USE_64_BIT_INT USE_LARGE_FI
+LES
                        USE_LONG_DOUBLE USE_PERLIO USE_PERL_ATOF

[download]

Enjoy, Have FUN! H.Merijn

Replies are listed 'Best First'.
Re^5: How to find out if it is 32bit or 64bit windows?
by syphilis (Archbishop) on Jun 27, 2011 at 13:01 UTC
    It baffled me too

    On my linux box, my "-Duselongdouble" build of perl also reports an nvsize (and long double size) of 12 bytes.
    IIRC, that equated to 64 bits of precision for the mantissa, and 16 bits for the exponent and sign - the remaining 2 bytes being unused as far as I could tell.

    Of course, it may not be the same for you.

    Cheers,
    Rob
[reply]
      that equated to 64 bits of precision for the mantissa, and 16 bits for the exponent and sign - the remaining 2 bytes being unused

      Ah! That makes a (little) sense of it.

      It'd be interesting to see a quick comparison of the performance of 64-bit .v. 80-bit .v. 128-bit. The latter must be an order of magnitude or more slower than the other two?

      Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
      "Science is about questioning the status quo. Questioning authority".
      In the absence of evidence, opinion is indistinguishable from prejudice.
[reply]
Re^5: Results for Perl 5.16.3.1 64 bit
by HelenCr (Monk) on May 14, 2013 at 11:43 UTC
    Here are my results for Perl 5.16.3.1 64 bit, running on Windows 7 64 bit:

    >perl -V:.*size
d_chsize='define';
d_malloc_good_size='undef';
d_malloc_size='undef';
doublesize='8';
fpossize='8';
gidsize='4';
i16size='2';
i32size='4';
i64size='8';
i8size='1';
intsize='4';
ivsize='8';
longdblsize='12';
longlongsize='8';
longsize='4';
lseeksize='8';
nvsize='8';
ptrsize='8';
shortsize='2';
sig_size='27';
sizesize='8';
st_ino_size='8';
u16size='2';
u32size='4';
u64size='8';
u8size='1';
uidsize='4';
uvsize='8';

    [download]

[reply]
[d/l]

In Section Seekers of Perl Wisdom