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lvandeve / lodepng

PNG encoder and decoder in C and C++.
zlib License
2.03k stars 420 forks source link

code optimization #169

Open cgiesselink opened 2 years ago

cgiesselink commented 2 years ago

https://github.com/lvandeve/lodepng/blob/b4ed2cd7ecf61d29076169b49199371456d4f90b/lodepng.cpp#L2420

r ^ 0xFFFFFFFFu is code for the 1'complement. Why not use the C/C++ 1'complement symbol '~' that the compiler could use best code implementation for used CPU?