[Webkit-unassigned] [Bug 158349] New: ARMv7 vstm and vldm instructions can only operate on a maximum of 16 registers.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=158349

            Bug ID: 158349
           Summary: ARMv7 vstm and vldm instructions can only operate on a
                    maximum of 16 registers.
    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: mark.lam at apple.com

According to the ARM Assembler Reference, the vstm and vldm instructions can only operate on a maximum of 16 registers.  See http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dht0002a/ch01s03s02.html and http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dht0002a/ch01s03s02.html.

The ARMv7 probe code was wrongly using these instructions to store and load all 32 'd' registers.

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