{"id":58913,"date":"2022-11-17T01:38:12","date_gmt":"2022-11-17T06:38:12","guid":{"rendered":"http:\/\/pappp.net\/?guid=e0c8587eab3a194ca8f22084956851bf"},"modified":"2022-11-17T01:38:12","modified_gmt":"2022-11-17T06:38:12","slug":"a-secret-apple-silicon-extension-to-accommodate-an-intel-8080-artifact","status":"publish","type":"post","link":"https:\/\/pappp.net\/?p=58913","title":{"rendered":"A secret Apple Silicon extension to accommodate an Intel 8080 artifact"},"content":{"rendered":"<p class=\"syndicated-attribution\">Source: <a href=\"https:\/\/bytecellar.com\/2022\/11\/16\/a-secret-apple-silicon-extension-to-accommodate-an-intel-8080-artifact\/\">Hacker News<\/a><\/p>\n<div style=\"background-color : #fff7d5;\n\t\t\tborder-width : 1px; padding : 5px; border-style : dashed; border-color : #e7d796;margin-bottom : 1em; color : #9a8c59;\">Article note: This is pretty cool, Apple has a mode to automatically compute the two 8080 arithmetic flags that ARMs don't. A setting enables computing the \u201cadjust flag\u201d (AF) and the \u201cparity flag\u201d (PF) exactly as an 8080-family part in bits 26 and 27 of the flags register.  In combination with a setting to switch to x86 style memory ordering, it's suddenly much less surprising that Rosetta2 does such a good job compared to other x86-on-ARM schemes.<\/div><a href=\"https:\/\/news.ycombinator.com\/item?id=33635720\" rel=\"noopener noreferrer\">Comments<\/a>","protected":false},"excerpt":{"rendered":"<p>Comments<\/p>\n<p> <a href=\"https:\/\/pappp.net\/?p=58913\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[226],"tags":[],"class_list":["post-58913","post","type-post","status-publish","format-standard","hentry","category-news-2"],"_links":{"self":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/58913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=58913"}],"version-history":[{"count":0,"href":"https:\/\/pappp.net\/index.php?rest_route=\/wp\/v2\/posts\/58913\/revisions"}],"wp:attachment":[{"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=58913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=58913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pappp.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=58913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}