[Webkit-unassigned] [Bug 154683] New: [DFG][FTL][B3] Support floor and ceil

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Feb 25 10:15:33 PST 2016


https://bugs.webkit.org/show_bug.cgi?id=154683

            Bug ID: 154683
           Summary: [DFG][FTL][B3] Support floor and ceil
    Classification: Unclassified
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: utatane.tea at gmail.com

Math.floor and Math.ceil are frequently called. builtin's @toInteger always calls @floor with @abs.
And SunSpider and V8 bench also calls the both (especially, Math.floor).
Similarly to the ArithRound, adding ArithFloor and ArithCeil is nice.

If it is added, we can convert DFG ArithFloor and ArithCeil to Identity if the given value is Int32!

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