TechQA.

Question

Can packing variables or parameters into structures/unions introduce unforseen performance penalties?

score 139 · Answer 1 · 2023-12-09T00:04:29.250000

0

Answer

139

Views

Can packing variables or parameters into structures/unions introduce unforseen performance penalties?

139 views Asked by CPlus At 09 December 2023 at 00:04

score 277 · Answer 2 · 2023-06-04T16:53:54.490000

Speed up strlen using SWAR in x86-64 assembly

277 views Asked by HeapUnderStop At 04 June 2023 at 16:53

score 334 · Answer 3 · 2023-06-01T12:56:30.550000

How to check if a register contains a zero byte without SIMD instructions

334 views Asked by HeapUnderStop At 01 June 2023 at 12:56

score 311 · Answer 4 · 2023-04-21T22:14:03.353000

Add two vectors (uint64_t type) with saturation for each int8_t element

311 views Asked by Umbra At 21 April 2023 at 22:14

score 485 · Answer 5 · 2023-01-18T00:42:02.597000

SIMD-within-a-register version of min/max

485 views Asked by swineone At 18 January 2023 at 00:42

score 307 · Answer 6 · 2022-12-14T19:11:56.727000

Fastest way to find 16bit match in a 4 element short array?

307 views Asked by AudioBubble At 14 December 2022 at 19:11

score 506 · Answer 7 · 2022-11-22T02:27:27.690000

Multiplication of two packed signed integers in one

506 views Asked by Chayim Friedman At 22 November 2022 at 02:27

score 189 · Answer 8 · 2022-05-15T06:48:47.650000

Performantly reverse the order of 16-bit quantities within a 64-bit word

189 views Asked by Moonchild At 15 May 2022 at 06:48

score 249 · Answer 9 · 2022-02-20T02:07:15.020000

bit twiddling to right pack bits

249 views Asked by Vic C At 20 February 2022 at 02:07

score 490 · Answer 10 · 2021-08-08T02:55:58.777000

How to implement SWAR unsigned less-than?

490 views Asked by Koz Ross At 08 August 2021 at 02:55

score 213 · Answer 11 · 2021-08-07T20:33:19.373000

How to write a SWAR comparison which puts 0xFF in a lane on matches?

213 views Asked by Koz Ross At 07 August 2021 at 20:33

score 425 · Answer 12 · 2021-07-08T03:37:09.490000

SWAR byte counting methods from 'Bit Twiddling Hacks' - why do they work?

425 views Asked by Koz Ross At 08 July 2021 at 03:37

score 2378 · Answer 13 · 2020-04-11T23:46:11.027000

Can a register hold multiple values at a time?

2.3k views Asked by Luke Davis At 11 April 2020 at 23:46

score 6062 · Answer 14 · 2020-01-07T23:56:08.023000

Subtracting packed 8-bit integers in an 64-bit integer by 1 in parallel, SWAR without hardware SIMD

6k views Asked by cam-white At 07 January 2020 at 23:56

score 405 · Answer 15 · 2018-06-03T04:29:59.040000

Compare 64-bit integers by segments

405 views Asked by user2961927 At 03 June 2018 at 04:29

score 2918 · Answer 16 · 2016-08-04T12:58:26.520000

How 0x01010101 is equivalent to 1<<24 + 1<<16 + 1<<8 + 1

2.9k views Asked by sac At 04 August 2016 at 12:58

score 539 · Answer 17 · 2015-02-17T03:53:50.200000

Is there an efficient way of doing 32-bit bitwise rotation separately on the high and low 32-bit parts of a 64-bit number?

539 views Asked by MNagy At 17 February 2015 at 03:53

score 7813 · Answer 18 · 2014-02-27T22:16:37.380000

How does this algorithm to count the number of set bits in a 32-bit integer work?

7.8k views Asked by Gaith At 27 February 2014 at 22:16

score 548 · Answer 19 · 2013-12-19T12:17:50.533000

How does this color blending trick that works on color components in parallel work?

548 views Asked by Boann At 19 December 2013 at 12:17

score 1413 · Answer 20 · 2011-04-10T20:00:59.320000

Signed INT Conversion of MSB ->LSB and LSB->MSB in C++

1.4k views Asked by Doug At 10 April 2011 at 20:00

TechQA.

List Question

Can packing variables or parameters into structures/unions introduce unforseen performance penalties?

Speed up strlen using SWAR in x86-64 assembly

How to check if a register contains a zero byte without SIMD instructions

Add two vectors (uint64_t type) with saturation for each int8_t element

SIMD-within-a-register version of min/max

Fastest way to find 16bit match in a 4 element short array?

Multiplication of two packed signed integers in one

Performantly reverse the order of 16-bit quantities within a 64-bit word

bit twiddling to right pack bits

How to implement SWAR unsigned less-than?

How to write a SWAR comparison which puts 0xFF in a lane on matches?

SWAR byte counting methods from 'Bit Twiddling Hacks' - why do they work?

Can a register hold multiple values at a time?

Subtracting packed 8-bit integers in an 64-bit integer by 1 in parallel, SWAR without hardware SIMD

Compare 64-bit integers by segments

How 0x01010101 is equivalent to 1<<24 + 1<<16 + 1<<8 + 1

Is there an efficient way of doing 32-bit bitwise rotation separately on the high and low 32-bit parts of a 64-bit number?

How does this algorithm to count the number of set bits in a 32-bit integer work?

How does this color blending trick that works on color components in parallel work?

Signed INT Conversion of MSB ->LSB and LSB->MSB in C++

Popular Questions

Popular Tags

Trending Questions