[Webkit-unassigned] [Bug 117147] [sh4] Add floating point absolute function support in baseline JIT

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=117147





--- Comment #3 from Julien Brianceau <jbrianceau at nds.com>  2013-06-03 07:44:20 PST ---
I've tested this patch on r151092 and I didn't see regressions when running
- Tools/Scripts/run-javascriptcore-tests
- Tools/Scripts/run-fast-jsc
- SunSpider 1.0


I used the following dumb test to measure the performance impact of this patch:

    var result = 1.123;
    for (var i = 0; i < 5000000; ++i) {
        result = result + Math.abs((i / -(i+1)) + (i * 1.1));
    }


Using r151092 jsc without patch, I get:
    real    0m 6.13s
    user    0m 6.00s
    sys     0m 0.10s


Using r151092 jsc with patch, I get about 4.3% better:
    real    0m 5.57s
    user    0m 5.45s
    sys     0m 0.10s

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