this post was submitted on 17 Oct 2024
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Science Memes

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submitted 2 months ago by [email protected] to c/[email protected]
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[–] [email protected] 167 points 2 months ago (5 children)

For anyone who doesn't want to do the conversion, that's 17 days.

[–] [email protected] 88 points 2 months ago (3 children)

Or -15 days

[–] [email protected] 42 points 2 months ago

Ominous

[–] [email protected] 5 points 2 months ago

Mmm yes. 5 bit two's complement.

I shouldn't make fun of it we've definitly made some ISA that weird.

[–] [email protected] 1 points 2 months ago (1 children)

what's the general rule for translating negatives from binary? did you just do like 17 - 2 • (-1) or something?

[–] [email protected] 3 points 2 months ago (1 children)

I used what known as 2's compliment. Take the complement (flip all the bits - here that would give you 01110 which is 14) then add 1.

[–] [email protected] 1 points 2 months ago (1 children)

thanks for the explanation! could you express it as a NOT operation plus one? like is that how it would be processed at a low level?

[–] [email protected] 2 points 2 months ago* (last edited 2 months ago)

My low level is a tad rusty from when I learned the C side in school, but if I recall the not operator resolves as a single Boolean (0 or 1 in true C), whereas compliment comes back as however many bits you put in - a not operation per bit.

In C, the not operator is ! and the compliment operator is ~

[–] [email protected] 55 points 2 months ago (2 children)

It also has a max of 31 days possible. Which has... implications.

[–] [email protected] 14 points 2 months ago

Among many other duties I manage the safety and claims database for an outsourced industrial cleaning company and let me tell you, some of the plants my company works struggle to make it a week without an accident, meanwhile some will go years without an accident. We also have one plant which had its last accident during the Bush Administration. Its absolutely wild how much safety can vary from one industrial facility to another

[–] [email protected] 2 points 2 months ago (1 children)

🤔 .... What implications? ಠ⁠_⁠ಠ

[–] [email protected] 7 points 2 months ago* (last edited 2 months ago) (1 children)

They must sacrifice an undergrad on the 32nd day

[–] [email protected] 3 points 2 months ago

This is actually how chromatography works. The mobile phase is 0.1% formic acid and 0.3% blood of the innocent.

[–] [email protected] 36 points 2 months ago (2 children)

Unless it's a signed integer, then it's -1 and they're expecting something...

[–] [email protected] 8 points 2 months ago (2 children)

A 5 bit long signed integer? What kind of weird system you using ? :p

[–] [email protected] 7 points 2 months ago

Two's complement

[–] [email protected] 1 points 1 month ago

Because a 5 bit unsigned integer is so much better? :p

[–] [email protected] 3 points 2 months ago

Only if you're using a sign bit rather than two's compliment (a sign bit allows for two representations of 0)

[–] [email protected] 4 points 2 months ago (1 children)

Or 11 in hexadecimal

[–] [email protected] 1 points 2 months ago (1 children)

B is 11 in hex though?

[–] [email protected] 6 points 2 months ago

As in, 0x11 is 17 in decimal.

[–] [email protected] 1 points 2 months ago

I did and I regret it