{"action":"created","issue":{"url":"https://api.github.com/repos/official-stockfish/Stockfish/issues/656","repository_url":"https://api.github.com/repos/official-stockfish/Stockfish","labels_url":"https://api.github.com/repos/official-stockfish/Stockfish/issues/656/labels{/name}","comments_url":"https://api.github.com/repos/official-stockfish/Stockfish/issues/656/comments","events_url":"https://api.github.com/repos/official-stockfish/Stockfish/issues/656/events","html_url":"https://github.com/official-stockfish/Stockfish/pull/656","id":151216774,"number":656,"title":"Use avx2 instruction set if pext is on","user":{"login":"braich","id":11818460,"avatar_url":"https://avatars.githubusercontent.com/u/11818460?v=3","gravatar_id":"","url":"https://api.github.com/users/braich","html_url":"https://github.com/braich","followers_url":"https://api.github.com/users/braich/followers","following_url":"https://api.github.com/users/braich/following{/other_user}","gists_url":"https://api.github.com/users/braich/gists{/gist_id}","starred_url":"https://api.github.com/users/braich/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/braich/subscriptions","organizations_url":"https://api.github.com/users/braich/orgs","repos_url":"https://api.github.com/users/braich/repos","events_url":"https://api.github.com/users/braich/events{/privacy}","received_events_url":"https://api.github.com/users/braich/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2016-04-26T19:15:57Z","updated_at":"2016-04-27T22:18:20Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/official-stockfish/Stockfish/pulls/656","html_url":"https://github.com/official-stockfish/Stockfish/pull/656","diff_url":"https://github.com/official-stockfish/Stockfish/pull/656.diff","patch_url":"https://github.com/official-stockfish/Stockfish/pull/656.patch"},"body":""},"comment":{"url":"https://api.github.com/repos/official-stockfish/Stockfish/issues/comments/215248646","html_url":"https://github.com/official-stockfish/Stockfish/pull/656#issuecomment-215248646","issue_url":"https://api.github.com/repos/official-stockfish/Stockfish/issues/656","id":215248646,"user":{"login":"mstembera","id":5421953,"avatar_url":"https://avatars.githubusercontent.com/u/5421953?v=3","gravatar_id":"","url":"https://api.github.com/users/mstembera","html_url":"https://github.com/mstembera","followers_url":"https://api.github.com/users/mstembera/followers","following_url":"https://api.github.com/users/mstembera/following{/other_user}","gists_url":"https://api.github.com/users/mstembera/gists{/gist_id}","starred_url":"https://api.github.com/users/mstembera/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mstembera/subscriptions","organizations_url":"https://api.github.com/users/mstembera/orgs","repos_url":"https://api.github.com/users/mstembera/repos","events_url":"https://api.github.com/users/mstembera/events{/privacy}","received_events_url":"https://api.github.com/users/mstembera/received_events","type":"User","site_admin":false},"created_at":"2016-04-27T22:18:20Z","updated_at":"2016-04-27T22:18:20Z","body":"If I understand correctly, we don't use any SSE explicitly but we let the compiler decide what instructions it thinks are best to emit.  If no CPUs exist with bmi2 and w/o AVX2 there should be no point in restricting the compilers choices even if currently there may be no measurable speedup.  Sorry but I don't have the right hardware to bench this."}}