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.
------------- Commit messages: - fix trailing white space errors - fix whitespaces - revert comment to original for divmodI - Update rax and rdx register usage in x86_64.ad - 8282221: x86 intrinsics for divideUnsigned and remainderUnsigned methods in java.lang.Integer and java.lang.Long Changes: https://git.openjdk.java.net/jdk/pull/7572/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7572&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8282221 Stats: 741 lines in 16 files changed: 738 ins; 1 del; 2 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
