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Reimplement utils::popcnt64

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Implement utils::popcnt128
This commit is contained in:
Nekotekina 2020-12-29 15:28:02 +03:00
parent 57621d1c4e
commit 6b96807112
3 changed files with 37 additions and 17 deletions
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10
rpcs3/util/atomic.cpp
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@ -162,15 +162,7 @@ static NEVER_INLINE bool ptr_cmp(const void* data, u32 _size, u128 old128, u128
// Count is taken from least significant byte and ignores some flags
const u64 count = static_cast<u64>(old128) & 0xff;
u64 bitc = new_value;
bitc = (bitc & 0xaaaaaaaaaaaaaaaa) / 2 + (bitc & 0x5555555555555555);
bitc = (bitc & 0xcccccccccccccccc) / 4 + (bitc & 0x3333333333333333);
bitc = (bitc & 0xf0f0f0f0f0f0f0f0) / 16 + (bitc & 0x0f0f0f0f0f0f0f0f);
bitc = (bitc & 0xff00ff00ff00ff00) / 256 + (bitc & 0x00ff00ff00ff00ff);
bitc = ((bitc & 0xffff0000ffff0000) >> 16) + (bitc & 0x0000ffff0000ffff);
bitc = (bitc >> 32) + bitc;
result = count < bitc;
result = count < utils::popcnt64(new_value);
break;
}
default: