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Why newer clang is generating one more instruction than just popcntl to count the bits of an int on haswell architecture?

score 150 · Answer 1 · 2023-08-28T07:47:17.653000

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Why newer clang is generating one more instruction than just popcntl to count the bits of an int on haswell architecture?

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How can I use the "builtin" function __builtin_ctzll in a VS C++ Project?

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score 229 · Answer 3 · 2023-02-14T00:15:14.013000

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score 212 · Answer 4 · 2022-09-18T16:02:35.053000

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score 298 · Answer 5 · 2019-10-11T07:25:26.007000

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score 6450 · Answer 7 · 2018-04-28T22:04:34.307000

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score 620 · Answer 8 · 2017-07-26T14:05:22.273000

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score 2687 · Answer 9 · 2017-05-29T21:08:49.700000

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score 1544 · Answer 10 · 2017-05-21T05:01:56.093000

How does Long.bitCount() finds the number of set bits?

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score 268 · Answer 11 · 2017-01-15T13:05:04.800000

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score 12068 · Answer 12 · 2016-06-30T03:02:16.527000

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score 638 · Answer 15 · 2016-02-03T10:38:10.007000

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score 278 · Answer 17 · 2015-05-15T07:14:21.883000

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score 3450 · Answer 18 · 2015-05-01T12:40:06.527000

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score 857 · Answer 20 · 2014-10-01T15:57:22.757000

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TechQA.

List Question

Why newer clang is generating one more instruction than just popcntl to count the bits of an int on haswell architecture?

How can I use the "builtin" function __builtin_ctzll in a VS C++ Project?

message output not working due to BitCount and Length being zero

32 bit builtin population count for clang counts long long integer c++

XOR operation and BitCount in Java on Long variables returns java.lang.NumberFormatException

Matrix transpose and population count

Counting 1 bits (population count) on large data using AVX-512 or AVX-2

Counting number of '1' values in each bit position in Redshift column

Java - Big O of bitCount()?

How does Long.bitCount() finds the number of set bits?

Calculate Hamming Distance in SQLite

what's the difference between __builtin_popcountll and_mm_popcnt_u64?

Trouble doing a bitwise xor + bit_count in mysql

Can someone explain how this bitCount code works?

MongoDB support search Bitwise XOR and Bit Count?

Counting number of 1 bits in C++ negative number

redis bitcount example not working

LC3 Bit Counter

Mysql convert varchar binary representation field to binary to do hamming distance calculation with bit_count

Bitwise - bitCount's formula meaning?

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