Comparing `Float`s, I'd like to know if `==` (and ...

# announcements

[elect]

Comparing `Float`s, I'd like to know if == (and also Float.compareTo) will call java.lang.Float.compare() under the hood

[karelpeeters]

Look at the generated bytecode.

[elect]

https://gist.github.com/elect86/7a81a145d59bc1b1ae4bad7af92c8e12

[elect]

I'm not familiar with bytecode at all

[elect]

any idea what does mean?

[diesieben07]

In this case it will compare "in accordance with IEEE 754" since the fcmp opcode is used:
https://stackoverflow.com/a/35647897/3638966

[elect]

what does the g means? (FCMPG)

[diesieben07]

https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-6.html#jvms-6.5.fcmp_op

[diesieben07]

See the "notes" section at the end of the paragraph

[elect]

yeah, thanks

[diesieben07]

Not much difference, it only matters when NaN is involved

[Lawik]

Just a tip, in IntelliJ you can also do: Tools -> Kotlin -> Show Kotlin Bytcode -> click the decompile button to show Java code.

[elect]

there shouldnt be a difference though, right?

[Lawik]

Difference in what?

[elect]

with View-> Show Bytecode

[Lawik]

No difference, the tip was more about the "decompile" button that shows Java code

[elect]

ok, thanks