0ct0pu5/ladybird
1
0
Fork 0
mirror of https://github.com/LadybirdBrowser/ladybird.git synced 2024-12-04 05:20:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 7

AK: Add count_trailing_zeroes_32()

Browse source 
Add count_trailing_zeroes_32() which is implemented with builtins
if available, otherwise there's a generic fallback.
This commit is contained in:
nimelehin 2020-03-23 17:31:37 +03:00 committed by Andreas Kling
parent 8137ef6252
commit 471db7ce0a
Notes: sideshowbarker 2024-07-19 07:52:30 +09:00 
Author: https://github.com/nimelehin
Commit: https://github.com/SerenityOS/serenity/commit/471db7ce0a0
1 changed files with 14 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

14
AK/Platform.h
View file

@ -84,3 +84,17 @@ template<typename T>
return value;
#endif
}
[[gnu::always_inline]] inline int count_trailing_zeroes_32(unsigned int val)
{
#if defined(__GNUC__) || defined(__clang__)
return __builtin_ctz(val);
#else
for (u8 i = 0; i < 32; ++i) {
if ((val >> i) & 1) {
return i;
}
}
return 0;
#endif
}