1Math::Int128(3) User Contributed Perl Documentation Math::Int128(3)
2
6 Math::Int128 - Manipulate 128 bits integers in Perl
7
9 use Math::Int128 qw(int128);
10 my $i = int128(1);
12 my $j = $i << 100;
13 my $k = int128("1234567890123456789000000");
14 print($i + $j * 1000000);
15
17 This module adds support for 128 bit integers, signed and unsigned, to
18 Perl.
19 In order to compile this module, your compiler must support one of
21 either the "__int128" or "int __attribute__ ((__mode__ (TI)))" types.
22 Both GCC and Clang have supported one or the other type for some time,
23 but they may only do so on 64-bit platforms.
24 OSX Caveat
26 On OSX, the system Perl is compiled with both the "-arch x86_64" and
27 "-arch i386" flags. When building this module with a Perl like this, we
28 strip the "-arch i386" flag out, meaning it is only compiled for the
29 64-bit architecture. Attempting to use this module while running in
30 32-bit mode may lead to brokenness. It's also possible that this will
31 cause other problems that we cannot foresee.
32 Note that if you have built your own non-multiarch Perl on OSX then
34 this will not be an issue.
35
37 See Math::Int64. This module provides a similar set of functions, just
38 "s/64/128/g" ;-)
39 Besides that, as object allocation and destruction has been found to be
41 a bottleneck, an alternative set of operations that use their first
42 argument as the output (instead of the return value) is also provided.
43 They are as follows:
45 int128_inc int128_dec int128_add int128_sub int128_mul int128_pow
47 int128_div int128_mod int128_divmod int128_and int128_or int128_xor
48 int128_left int128_right int128_not int128_neg
49 and the corresponding "uint128" versions.
51 For instance:
53 my $a = int128("1299472960684039584764953");
55 my $b = int128("-2849503498690387383748");
56 my $ret = int128();
57 int128_mul($ret, $a, $b);
58 int128_inc($ret, $ret); # $ret = $ret + 1
59 int128_add($ret, $ret, "12826738463");
60 say $ret;
61 "int128_divmod" returns both the result of the division and the
63 remainder:
64 my $ret = int128();
66 my $rem = int128();
67 int128_divmod($ret, $rem, $a, $b);
68
70 The module provides a C API that allows to wrap/unwrap int128_t and
71 uint128_t values from other modules written in C/XS.
72 It is identical to that provided by Math::Int64 so read the
74 documentation there in order to know how to use it.
75
77 Support more operations as log2, pow, etc.
78
80 The C API feature is experimental.
81 This module requires 128bit integer support from the C compiler.
83 Currently only gcc 4.4 and later are supported. If you have a different
84 compiler that also supports 128bit integers get in touch with me in
85 order to have it supported.
86 You can send me bug reports by email to the address that appears below
88 or use the CPAN RT bug tracking system available at
89 <http://rt.cpan.org>.
90 The source for the development version of the module is hosted at
92 GitHub: <https://github.com/salva/p5-Math-Int128>.
93 My wishlist
95 If you like this module and you're feeling generous, take a look at my
96 Amazon Wish List: <http://amzn.com/w/1WU1P6IR5QZ42>
97
99 Math::Int64, Math::GMP, Math::GMPn.
100 <http://perlmonks.org/?node_id=886488>.
102
104 Copyright © 2007, 2009, 2011-2015 by Salvador Fandiño
105 (sfandino@yahoo.com)
106 Copyright © 2014-2015 by Dave Rolsky
108 This library is free software; you can redistribute it and/or modify it
110 under the same terms as Perl itself, either Perl version 5.10.1 or, at
111 your option, any later version of Perl 5 you may have available.
112perl v5.34.0 2021-07-22 Math::Int128(3)