Keyboard shortcuts

Scrolling

dorCtrl+d
Scroll down
uorCtrl+u
Scroll up
Ctrl+e
One line down
Ctrl+y
One line up
gtheng
Top of article
G
Bottom of article

Articles

j
Older article
k
Newer article
O
Open original
H
Open hackernews
R
Open reddit

Lists

jor↓
Next item
kor↑
Previous item
gtheng
First item
G
Last item
oorEnter
Open selected item

Go to

gthenforgtheni
Feed
gthen1–9
Open feed entry
gthenb
Browse
gthenp
Preferences

Search and help

⌘+kCtrl+kor/
Global search
?
Show this help
Esc
Close this help

Horizontal Operations

computerenhance.com original

--:--

--:--

The full episode is only available to paid subscribers of Computer, Enhance!

We can employ our knowledge of shuffles and permutes to make horizontal operations out of the vertical ones provided by SIMD instruction sets.

Oct 21, 2026

∙ Paid

This is the twenty-first video in Part 5 of the Performance-Aware Programming series. Please see the Table of Contents to quickly navigate through the rest of the course as it is updated, and the code repository for downloadable code listings.