Re: Lesson Learned: not all 32b perls are created equal


Do you know where your variables are?
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Re: Lesson Learned: not all 32b perls are created equal

by ikegami (Patriarch)

on Sep 30, 2017 at 21:43 UTC ( [id://1200432]=note: print w/replies, xml )

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in reply to Lesson Learned: not all 32b perls are created equal

C doesn't provide operators to perform bitwise operations on floats (because processors don't provide those either), and Perl doesn't go out of its way to add support for that.

It did recently add support for hexadecimal floats, though!

$ perl -e'CORE::say sprintf "%a", 9/10'
0x1.ccccccccccccdp-1

$ perl -e'CORE::say 0x1.ccccccccccccdp-1'
0.9
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Re^2: Lesson Learned: not all 32b perls are created equal by pryrt (Abbot) on Sep 30, 2017 at 22:14 UTC
It was a case of subconsciously expecting DWIM, and since it passed my 100%-coverage tests with 32bit perl, I thought it did DWIM Yes, I saw the %a soon after releasing that project... defonitely a welcome addition. Some day, I might have my module use the builtin on modern perls, but I'll have to see whether it has all the features I want...	[reply]

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