On 2013/08/06 12:56:17, Jakob wrote:
Unifying lithium codegen and the stub sounds reasonable. Maybe you can do
a
microbenchmark to figure out whether the branchless stub code or the
conditional
"neg" in lithium is faster in practice.
Actually I did an experiment before. The branchless stub code was faster
than
the conditional "neg". One of my previous idea is to port branchless code to
lithium. The issue is that LMathAbs only has one available register. To use
the
branchless code, you need to change the LMathAbs instruction to assign a
temporary register.
https://codereview.chromium.org/22285003/
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