Programmer Humor

19822 readers

974 users here now

Welcome to Programmer Humor!

This is a place where you can post jokes, memes, humor, etc. related to programming!

For sharing awful code theres also Programming Horror.

Rules

Keep content in english
No advertisements
Posts must be related to programming or programmer topics

founded 2 years ago

MODERATORS

270

thisIsGoingToBeASeriousDebate (programming.dev)

submitted 1 year ago by TadoTheRustacean to c/programmer_humor

41 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] [email protected] 14 points 1 year ago* (last edited 1 year ago) (1 children)

Definitely left. Right one won't be optimized. (And there are ~~so many~~ some mistakes in your inline asm...)

[–] TadoTheRustacean 1 points 1 year ago (1 children)

What mistakes?

[–] [email protected] 6 points 1 year ago (1 children)

Mostly the missing listing of clobbered registers. Other than that it's mostly just that you're doing useless things, like manually putting the stuff into the registers instead of letting the compiler do it, and the useless push and pop. And the loop is obviously not needed and would hurt performance if you do every write like that.

asm!(
"syscall",
in("rax") 1,
in("rdi") 1,
in("rsi") text_ptr,
in("rdx") text_size,

)

("so many" was inappropriate, sorry.)

[–] TadoTheRustacean 1 points 1 year ago (1 children)

I am hopeless at getting the text_ptr simpler than i64::from_str_radix(&format!("{:p}", my_string)[2..], 16).unwrap(); How can i get it the normal way?

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

Just use str::as_ptr().

Here's an example (disclaimer: I haven't used inline asm in rust before, expect issues): https://godbolt.org/z/sczYGe96f