[Webkit-unassigned] [Bug 210039] New: ARM64 moveConditionallyDouble() for DoubleNotEqualAndOrdered is wrong.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=210039

            Bug ID: 210039
           Summary: ARM64 moveConditionallyDouble() for
                    DoubleNotEqualAndOrdered is wrong.
           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: mark.lam at apple.com

For the scenario where the dest register is same as the then case register, there is one case instruction that should be executed based on the overflow flag to test for unordered operands.  Instead, we were testing for the not equal condition.  This bug was caught by testmasm.

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