RFR: 8340079: Modify rearrange/selectFrom Vector API methods to perform wrapIndexes instead of checkIndexes

[Sandhya Viswanathan]

Currently the rearrange and selectFrom APIs check shuffle indices and throw IndexOutOfBoundsException if there is any exceptional source index in the shuffle. This causes the generated code to be less optimal. This PR modifies the rearrange/selectFrom Vector API methods to perform wrapIndexes instead of checkIndexes and performs optimizations to generate efficient code.

Summary of changes is as follows:
 1) The rearrange/selectFrom methods do wrapIndexes instead of checkIndexes.
 2) Intrinsic for wrapIndexes and selectFrom to generate efficient code

For the following source:


    public void test() {
        var index = ByteVector.fromArray(bspecies128, shuffles[1], 0);
        for (int j = 0; j < bspecies128.loopBound(size); j += bspecies128.length()) {
            var inpvect = ByteVector.fromArray(bspecies128, byteinp, j);
            index.selectFrom(inpvect).intoArray(byteres, j);
        }
    }


The code generated for inner main now looks as follows:
;; B24: #      out( B24 B25 ) <- in( B23 B24 ) Loop( B24-B24 inner main of N173 strip mined) Freq: 4160.96
  0x00007f40d02274d0:   movslq %ebx,%r13
  0x00007f40d02274d3:   vmovdqu 0x10(%rsi,%r13,1),%xmm1
  0x00007f40d02274da:   vpshufb %xmm2,%xmm1,%xmm1
  0x00007f40d02274df:   vmovdqu %xmm1,0x10(%rax,%r13,1)
  0x00007f40d02274e6:   vmovdqu 0x20(%rsi,%r13,1),%xmm1
  0x00007f40d02274ed:   vpshufb %xmm2,%xmm1,%xmm1
  0x00007f40d02274f2:   vmovdqu %xmm1,0x20(%rax,%r13,1)
  0x00007f40d02274f9:   vmovdqu 0x30(%rsi,%r13,1),%xmm1
  0x00007f40d0227500:   vpshufb %xmm2,%xmm1,%xmm1
  0x00007f40d0227505:   vmovdqu %xmm1,0x30(%rax,%r13,1)
  0x00007f40d022750c:   vmovdqu 0x40(%rsi,%r13,1),%xmm1
  0x00007f40d0227513:   vpshufb %xmm2,%xmm1,%xmm1
  0x00007f40d0227518:   vmovdqu %xmm1,0x40(%rax,%r13,1)
  0x00007f40d022751f:   add    $0x40,%ebx
  0x00007f40d0227522:   cmp    %r8d,%ebx
  0x00007f40d0227525:   jl     0x00007f40d02274d0

Best Regards,
Sandhya

-------------

Commit messages:
 - Merge branch 'master' of https://git.openjdk.java.net/jdk into rearrangewrap
 - Some cleanup
 - Some small fixes
 - Initial feedback
 - Optionally partial wrap shuffles during construction
 - Wrap shuffle on rearrange

Changes: https://git.openjdk.org/jdk/pull/20634/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20634&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8340079
  Stats: 686 lines in 47 files changed: 548 ins; 30 del; 108 mod
  Patch: https://git.openjdk.org/jdk/pull/20634.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20634/head:pull/20634

PR: https://git.openjdk.org/jdk/pull/20634