RFR: 8285868: x86_64 intrinsics for floating point methods isNaN, isFinite and isInfinite [v3]

[Srinivas Vamsi Parasa]

> We develop optimized x86_64 intrinsics for the floating point class check methods isNaN(), isFinite() and IsInfinite() for Float and Double classes. JMH benchmarks show ~8x improvement for isNan(), ~3x improvement for isInfinite() and 15% gain for isFinite().

Srinivas Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:

  update jmh tests

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8459/files
  - new: https://git.openjdk.java.net/jdk/pull/8459/files/79d407bd..f4769cd3

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8459&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8459&range=01-02

  Stats: 6 lines in 2 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8459.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8459/head:pull/8459

PR: https://git.openjdk.java.net/jdk/pull/8459