RFR: 8282221: x86 intrinsics for divideUnsigned and remainderUnsigned methods in java.lang.Integer and java.lang.Long [v11]

[Srinivas Vamsi Parasa]

> Optimizes the divideUnsigned() and remainderUnsigned() methods in java.lang.Integer and java.lang.Long classes using x86 intrinsics. This change shows 3x improvement for Integer methods and upto 25% improvement for Long. This change also implements the DivMod optimization which fuses division and modulus operations if needed. The DivMod optimization shows 3x improvement for Integer and ~65% improvement for Long.

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

  Idead Ideal for udiv, umod nodes and update jtreg tests to use corner cases

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7572/files
  - new: https://git.openjdk.java.net/jdk/pull/7572/files/9949047c..bfb6c02e

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7572&range=10
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7572&range=09-10

  Stats: 701 lines in 7 files changed: 423 ins; 274 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7572.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7572/head:pull/7572

PR: https://git.openjdk.java.net/jdk/pull/7572