The complexity of copying data on x86 microprocessors

[erek]

History of things is important

“The choices are between what might be called a RISCy approach and a CISCy approach. Or in other words, between using lots of simple instructions or a small number of complex instructions.

This all sheds some interesting insights into the evolution of the x86 architecture and how complex decisions to optimize code can be.

We’ll start by looking at one x86 instruction that can be used to copy data.”

Source: https://thechipletter.substack.com/p/the-long-history-of-rep-movs

 

[4saken]

sweet, paid subscribers only.

 

[erek]

sweet, paid subscribers only.

Re: paywalls, Is archive.is legal? Been trying to understand the ramifications of that site and it’s been around for years

“Archive.is (also known as "Archive.today") is a website that allows users to create and view archived snapshots of web pages. It serves as a tool for preserving the contents of a webpage at a specific point in time, essentially taking a snapshot of the page and storing it for future reference.

The purpose of Archive.is is to combat issues such as link rot and content deletion. It provides a means to create permanent copies of web pages that may later be modified or removed, ensuring that the information remains accessible even if the original page is no longer available.

When a user enters a URL into Archive.is, the website captures and saves a screenshot of the webpage, as well as its source code. This snapshot is then stored and can be accessed through a unique URL generated by Archive.is. The archived page includes all the text, images, and other media present at the time of archiving.

Archive.is is often used to preserve controversial or sensitive web content, as it allows users to capture and store pages that might be subject to censorship, modification, or removal. It is commonly employed in research, journalism, and online discussions to reference and share specific versions of web pages.

It's important to note that while Archive.is strives to preserve the integrity of web content, it doesn't guarantee the accuracy or completeness of the archived pages. Additionally, some websites may block or restrict access to Archive.is, preventing their pages from being archived.”