[Webkit-unassigned] [Bug 72857] New: Optimize JITArithmetic32_64.cpp:: op_add & op_sub

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=72857

           Summary: Optimize JITArithmetic32_64.cpp:: op_add & op_sub
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: huiqing.zeng at intel.com


For the condition ‘int +(-) int’ overflow, SFX handles it in CTI, CTI had more overhead: prepare native call frame; type-check many times; try convert result back to integer;
we optimize the emit_op_add(sub)[ &emitAdd(Sub)32Constant ]: do OP_ADD(SUB) in double and converts back to integer at the last.
This will lead to 1.56x on stanford-crypto-pbkdf2 and 1.47x on stanford-sha256-iterative if we disable DFG_JIT.

-- 
Configure bugmail: https://bugs.webkit.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.