Manual Reference Pages - MATH::INT128 (3)
Math::Int128 - Manipulate 128 bits integers in Perl
use Math::Int128 qw(int128);
my $i = int128(1);
my $j = $i << 100;
my $k = int128("1234567890123456789000000");
print($i + $j * 1000000);
This module adds support for 128 bit integers, signed and unsigned, to
In order to compile this module, your compiler must support one of either the
__int128 or int __attribute__ ((__mode__ (TI))) types. Both GCC and
Clang have supported one or the other type for some time, but they may only do
so on 64-bit platforms.
On OSX, the system Perl is compiled with both the -arch x86_64 and -arch
i386 flags. When building this module with a Perl like this, we strip the
-arch i386 flag out, meaning it is only compiled for the 64-bit
architecture. Attempting to use this module while running in 32-bit mode may
lead to brokenness. Its also possible that this will cause other problems
that we cannot foresee.
Note that if you have built your own non-multiarch Perl on OSX then this will
not be an issue.
See Math::Int64. This module provides a similar set of functions,
just s/64/128/g ;-)
Besides that, as object allocation and destruction has been found to
be a bottleneck, an alternative set of operations that use their first
argument as the output (instead of the return value) is also
They are as follows:
int128_inc int128_dec int128_add int128_sub int128_mul int128_pow
int128_div int128_mod int128_divmod int128_and int128_or int128_xor
int128_left int128_right int128_not int128_neg
and the corresponding uint128 versions.
my $a = int128("1299472960684039584764953");
my $b = int128("-2849503498690387383748");
my $ret = int128();
int128_mul($ret, $a, $b);
int128_inc($ret, $ret); # $ret = $ret + 1
int128_add($ret, $ret, "12826738463");
int128_divmod returns both the result of the division and the remainder:
my $ret = int128();
my $rem = int128();
int128_divmod($ret, $rem, $a, $b);
The module provides a C API that allows to wrap/unwrap int128_t and
uint128_t values from other modules written in C/XS.
It is identical to that provided by Math::Int64 so read the
documentation there in order to know how to use it.
Support more operations as log2, pow, etc.
BUGS AND SUPPORT
The C API feature is experimental.
This module requires 128bit integer support from the C
compiler. Currently only gcc 4.4 and later are supported. If you have
a different compiler that also supports 128bit integers get in touch
with me in order to have it supported.
You can send me bug reports by email to the address that appears below
or use the CPAN RT bug tracking system available at
The source for the development version of the module is hosted at
If you like this module and youre feeling generous, take a look at my
Amazon Wish List: <http://amzn.com/w/1WU1P6IR5QZ42>
Math::Int64, Math::GMP, Math::GMPn.
COPYRIGHT AND LICENSE
Copyright X 2007, 2009, 2011-2015 by Salvador Fandinõ (email@example.com)
Copyright X 2014-2015 by Dave Rolsky
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.10.1 or,
at your option, any later version of Perl 5 you may have available.
|perl v5.20.3 ||MATH::INT128 (3) ||2015-04-07 |
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