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Add bit counter to utils

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This commit is contained in:
Pavel Krajcevski 2014-03-10 14:58:36 -04:00
parent 5a68febdda
commit 56c199fc5d
1 changed files with 8 additions and 0 deletions
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8
ASTCEncoder/src/Utils.h
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@ -101,6 +101,14 @@ namespace ASTCC {
return -1; return -1;
}; };
// Count the number of bits set in a number.
Popcnt(uint32 n) {
uint32 c;
for(c = 0; n; c++) {
n &= n-1;
}
return c;
}
} // namespace ASTCC } // namespace ASTCC
#endif // ASTCENCODER_SRC_UTILS_H_ #endif // ASTCENCODER_SRC_UTILS_H_