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`

dram🎀 @dramforever@mastodon.social

12/27/2025, 4:23:04 PM

Public

Intel really gave us an instruction called "setzune"

https://cdrdv2-public.intel.com/817241/817241-apx-asm-syntax.pdf

3 ZU Indication

The only instructions that can use the ZU (zero-upper) indication are the SETcc instructions in EVEX map 4 and the IMUL instructions with opcodes 0x69 and 0x68 in EVEX map 4. The ZU indication is expressed as a suffix in the forms IMULZU and SETZUcc. (Note that “ZU” appears before the condition code in SETZUcc.) In the AT&T syntax, the “zu” should appear before the OSIZE modifier.

Intel syntax
imulzu ax, word ptr [rbx], 0xab
setzunz al

AT&T syntax
imulzuw %0xab, (%rbx), %ax
setzuneb %al

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