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532
Views

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

Published on
#optimization #language-agnostic #bit-manipulation #color-blending #swar
141
Views

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

Published on
#c #gcc #struct #micro-optimization #swar
309
Views

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

Published on
#c #x86-64 #micro-optimization #swar
464
Views

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

Published on
#c #assembly #bit-manipulation #arm64 #swar
181
Views

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

Published on
#performance #assembly #optimization #x86-64 #swar
485
Views

Multiplication of two packed signed integers in one

Published on
#c++ #bit-manipulation #stockfish #swar
403
Views

Compare 64-bit integers by segments

Published on
#c++ #bit-manipulation #swar
2.3k
Views

Can a register hold multiple values at a time?

Published on
#assembly #x86-64 #simd #cpu-registers #swar
1.4k
Views

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

Published on
#c++ #bit-manipulation #reverse #swar
426
Views

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

Published on
#c #bit-manipulation #swar
7.8k
Views

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

Published on
#c++ #c #algorithm #hammingweight #swar
476
Views

How to implement SWAR unsigned less-than?

Published on
#c #bit-manipulation #swar
205
Views

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

Published on
#c #bit-manipulation #swar
328
Views

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

Published on
#assembly #bit-manipulation #x86-64 #simd #swar
268
Views

Speed up strlen using SWAR in x86-64 assembly

Published on
#assembly #x86-64 #micro-optimization #strlen #swar
235
Views

bit twiddling to right pack bits

Published on
#bit-manipulation #simd #swar
531
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
#c #bit-manipulation #bit-shift #swar
2.9k
Views

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

Published on
#binary #bit-manipulation #bitwise-operators #bit-shift #swar
6k
Views

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

Published on
#c++ #c #bit-manipulation #simd #swar
304
Views

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

Published on
#assembly #bit-manipulation #x86-64 #saturation-arithmetic #swar

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