{"action":"created","issue":{"url":"https://api.github.com/repos/rust-lang/rust/issues/32256","repository_url":"https://api.github.com/repos/rust-lang/rust","labels_url":"https://api.github.com/repos/rust-lang/rust/issues/32256/labels{/name}","comments_url":"https://api.github.com/repos/rust-lang/rust/issues/32256/comments","events_url":"https://api.github.com/repos/rust-lang/rust/issues/32256/events","html_url":"https://github.com/rust-lang/rust/pull/32256","id":140837275,"number":32256,"title":"Add intrinsics for float arithmetic with `fast` flag enabled","user":{"login":"bluss","id":3209739,"avatar_url":"https://avatars.githubusercontent.com/u/3209739?v=3","gravatar_id":"","url":"https://api.github.com/users/bluss","html_url":"https://github.com/bluss","followers_url":"https://api.github.com/users/bluss/followers","following_url":"https://api.github.com/users/bluss/following{/other_user}","gists_url":"https://api.github.com/users/bluss/gists{/gist_id}","starred_url":"https://api.github.com/users/bluss/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bluss/subscriptions","organizations_url":"https://api.github.com/users/bluss/orgs","repos_url":"https://api.github.com/users/bluss/repos","events_url":"https://api.github.com/users/bluss/events{/privacy}","received_events_url":"https://api.github.com/users/bluss/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":{"login":"nikomatsakis","id":155238,"avatar_url":"https://avatars.githubusercontent.com/u/155238?v=3","gravatar_id":"","url":"https://api.github.com/users/nikomatsakis","html_url":"https://github.com/nikomatsakis","followers_url":"https://api.github.com/users/nikomatsakis/followers","following_url":"https://api.github.com/users/nikomatsakis/following{/other_user}","gists_url":"https://api.github.com/users/nikomatsakis/gists{/gist_id}","starred_url":"https://api.github.com/users/nikomatsakis/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/nikomatsakis/subscriptions","organizations_url":"https://api.github.com/users/nikomatsakis/orgs","repos_url":"https://api.github.com/users/nikomatsakis/repos","events_url":"https://api.github.com/users/nikomatsakis/events{/privacy}","received_events_url":"https://api.github.com/users/nikomatsakis/received_events","type":"User","site_admin":false},"milestone":null,"comments":12,"created_at":"2016-03-15T00:44:01Z","updated_at":"2016-03-18T12:29:38Z","closed_at":null,"pull_request":{"url":"https://api.github.com/repos/rust-lang/rust/pulls/32256","html_url":"https://github.com/rust-lang/rust/pull/32256","diff_url":"https://github.com/rust-lang/rust/pull/32256.diff","patch_url":"https://github.com/rust-lang/rust/pull/32256.patch"},"body":"Add intrinsics for float arithmetic with `fast` flag enabled\r\n\r\n`fast` a.k.a UnsafeAlgebra is the flag for enabling all \"unsafe\"\r\n(according to llvm) float optimizations.\r\n\r\nSee LangRef for more information http://llvm.org/docs/LangRef.html#fast-math-flags\r\n\r\nProviding these operations with less associativity rules (for example)\r\nis useful to numerical applications.\r\n\r\nFor example, the summation loop:\r\n\r\n    let sum = 0.;\r\n    for element in data {\r\n        sum += *element;\r\n    }\r\n\r\nUsing the default floating point semantics, this loop expresses that the\r\nfloats must be added in a sequence, one after another. This constraint\r\nis usually completely unintended, and it means that no auto-vectorization\r\nis possible."},"comment":{"url":"https://api.github.com/repos/rust-lang/rust/issues/comments/198329765","html_url":"https://github.com/rust-lang/rust/pull/32256#issuecomment-198329765","issue_url":"https://api.github.com/repos/rust-lang/rust/issues/32256","id":198329765,"user":{"login":"bors","id":3372342,"avatar_url":"https://avatars.githubusercontent.com/u/3372342?v=3","gravatar_id":"","url":"https://api.github.com/users/bors","html_url":"https://github.com/bors","followers_url":"https://api.github.com/users/bors/followers","following_url":"https://api.github.com/users/bors/following{/other_user}","gists_url":"https://api.github.com/users/bors/gists{/gist_id}","starred_url":"https://api.github.com/users/bors/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bors/subscriptions","organizations_url":"https://api.github.com/users/bors/orgs","repos_url":"https://api.github.com/users/bors/repos","events_url":"https://api.github.com/users/bors/events{/privacy}","received_events_url":"https://api.github.com/users/bors/received_events","type":"User","site_admin":false},"created_at":"2016-03-18T12:29:38Z","updated_at":"2016-03-18T12:29:38Z","body":":snowman: The build was interrupted to prioritize another pull request."}}