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  1. JDK
  2. JDK-8039104

Don't use Math.min/max intrinsic on x86

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    • Cause Known
    • x86
    • generic

      Math.min/max intrinsic unconditionally generates cmove instructions on x86 which may perform much worse than branch depending on probability of branches.
      We have code in PhaseIdealLoop::conditional_move() which takes into account branch's probability.
      I suggest to not use LibraryCallKit::inline_min_max() on CPUs which have good predictors (modern x86).

        1. JmhMaxBenchmark.java
          3 kB

            kvn Vladimir Kozlov
            kvn Vladimir Kozlov
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              Created:
              Updated: