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remove unnecessary & ~0x7 #3

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remove unnecessary & ~0x7 #3

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2 changes: 1 addition & 1 deletion popcount.h
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Original file line number Diff line number Diff line change
Expand Up @@ -125,7 +125,7 @@ inline int select64_broadword(uint64 x, int k) {

// Phase 2: compare each byte sum with the residual
const uint64 residual_step_8 = residual * ONES_STEP_8;
const int place = ( LEQ_STEP_8( byte_sums, residual_step_8 ) * ONES_STEP_8 >> 53 ) & ~0x7;
const int place = ( LEQ_STEP_8( byte_sums, residual_step_8 ) * ONES_STEP_8 >> 53 );

// Phase 3: Locate the relevant byte and make 8 copies with incremental masks
const int byte_rank = residual - ( ( ( byte_sums << 8 ) >> place ) & 0xFF );
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