Question

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

score 496 · Answer 1 · 2013-12-19 12:17:50

496

Views

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

Published on 19 December 2013 at 12:17

score 108 · Answer 2 · 2023-12-09 00:04:29

108

Views

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

Published on 09 December 2023 at 00:04

score 274 · Answer 3 · 2022-12-14 19:11:56

274

Views

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

Published on 14 December 2022 at 19:11

score 447 · Answer 4 · 2023-01-18 00:42:02

447

Views

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

Published on 18 January 2023 at 00:42

score 148 · Answer 5 · 2022-05-15 06:48:47

148

Views

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

Published on 15 May 2022 at 06:48

score 448 · Answer 6 · 2022-11-22 02:27:27

448

Views

Multiplication of two packed signed integers in one

Published on 22 November 2022 at 02:27

score 373 · Answer 7 · 2018-06-03 04:29:59

373

Views

Compare 64-bit integers by segments

Published on 03 June 2018 at 04:29

score 2.3k · Answer 8 · 2020-04-11 23:46:11

2.3k

Views

Can a register hold multiple values at a time?

Published on 11 April 2020 at 23:46

score 1.3k · Answer 9 · 2011-04-10 20:00:59

1.3k

Views

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

Published on 10 April 2011 at 20:00

score 396 · Answer 10 · 2021-07-08 03:37:09

396

Views

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

Published on 08 July 2021 at 03:37

score 7.8k · Answer 11 · 2014-02-27 22:16:37

7.8k

Views

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

Published on 27 February 2014 at 22:16

score 469 · Answer 12 · 2021-08-08 02:55:58

469

Views

How to implement SWAR unsigned less-than?

Published on 08 August 2021 at 02:55

score 199 · Answer 13 · 2021-08-07 20:33:19

199

Views

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

Published on 07 August 2021 at 20:33

score 323 · Answer 14 · 2023-06-01 12:56:30

323

Views

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

Published on 01 June 2023 at 12:56

score 262 · Answer 15 · 2023-06-04 16:53:54

262

Views

Speed up strlen using SWAR in x86-64 assembly

Published on 04 June 2023 at 16:53

score 230 · Answer 16 · 2022-02-20 02:07:15

230

Views

bit twiddling to right pack bits

Published on 20 February 2022 at 02:07

score 525 · Answer 17 · 2015-02-17 03:53:50

525

Views

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?

Published on 17 February 2015 at 03:53

score 2.9k · Answer 18 · 2016-08-04 12:58:26

2.9k

Views

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

Published on 04 August 2016 at 12:58

score 6k · Answer 19 · 2020-01-07 23:56:08

6k

Views

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

Published on 07 January 2020 at 23:56

score 299 · Answer 20 · 2023-04-21 22:14:03

299

Views

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

Published on 21 April 2023 at 22:14

List Question

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

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

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

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

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

Multiplication of two packed signed integers in one

Compare 64-bit integers by segments

Can a register hold multiple values at a time?

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

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

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

How to implement SWAR unsigned less-than?

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

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

Speed up strlen using SWAR in x86-64 assembly

bit twiddling to right pack bits

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

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

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

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