As long as you are very careful to use unsigned arithmetic and specify bitmasks that are no larger than the integer-size you know that you are using, code like this ought to be transportable.
Unfortunately, it's not always quite as simple in the general case. For example, if the 32-bit code relies on specific overflow/wrap-over effects. Consider the following very simple case:
my $result = (0xffffffff + 2) & 0xffffffff;
Although the result is masked down to 32 bits, it differs depending on the perl being used:
32-bit perl: 4294967295
64-bit perl: 1
(I'm not saying it cannot be done, but it requires taking into account the specific overflow behavior, IV/UV to NV conversions of 32-bit perls, etc. — simple 0xffffffff AND-masking isn't enough.)
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||