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I learned x86 floating point assembly from Ray Seyfarth's book:

https://www.amazon.com/Introduction-Bit-Assembly-Programming...

I figured out how to write some basic stuff, then I learned to use perf to performance tune. Being able to read a little assembly was a revolution for me.

I also chuckled about how C is non-portable; omg C++ is so much worse. In some sense, x86 asm is more portable than just about anything now, sure you can't run it on ARM, but your C++ code won't compile on ARM either and you'll be in #ifdef hell for two weeks to get it there, at which point you'll give up.




Why is C++ less portable than C? In my experience, non-portable code happens when the interaction with the OS is not well isolated. Since the major OS interfaces are C header files, I don't see why C++ makes it any worse.


I should've clarified: I meant portability of code so that is can be compiled by multiple compilers, VS, clang, gcc. The feature set for C++ is so vast that it's almost certain that you'll write code on for one compiler that doesn't compile on another.




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