Hackers' Pub

Syntax	Description	Examples
`"` keyword `"`	Finds the string within quotes, including spaces. Case-insensitive. (Escape quotes inside with `\"`)	`"Hackers' Pub"`
`from:` handle	Finds content written by the specified user.	`from:hongminhee` `from:hongminhee@hollo.social`
`lang:` ISO 639-1	Finds content written in the specified language.	`lang:en`
`#` tag	Finds content with the specified tag. Case-insensitive.	`#HackersPub`
condition condition	Finds content that satisfies both conditions on either side of the space (logical AND).	`"Hackers' Pub" lang:en`
condition `OR` condition	Finds content that satisfies at least one of the conditions on either side of the OR operator (logical OR).	`#HackersPub OR "Hackers' Pub" lang:en`
`(` condition `)`	Combines the operators within the parentheses first.	`(#HackersPub OR "Hackers' Pub" OR "Hackers Pub") lang:en`

matt godbolt @mattgodbolt@hachyderm.io

12/5/2025, 12:06:26 PM

Public

Day 5 of Advent of Compiler Optimisations!

x86 has LEA for multiplication tricks, but what does ARM bring to the party? Meet the barrel shifter—a hardware feature that lets many instructions shift their second operand. The compiler exploits this to turn multiplications into shifted adds, all in a single instruction. Different architectures, different superpowers!

#AoCO2025

ARM's barrel shifter tricks — Matt Godbolt’s blog

The ARM architecture has a cool feature, and compilers know how to use it

xania.org

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