ART: ARM64: Support DotProd SIMD idiom.
Implement support for vectorization idiom which performs dot
product of two vectors and adds the result to wider precision
components in the accumulator.
viz. DOT_PRODUCT([ a1, .. , am], [ x1, .. , xn ], [ y1, .. , yn ]) =
[ a1 + sum(xi * yi), .. , am + sum(xj * yj) ],
for m <= n, non-overlapping sums,
for either both signed or both unsigned operands x, y.
The patch shows up to 7x performance improvement on a micro
benchmark on Cortex-A57.
Test: 684-checker-simd-dotprod.
Test: test-art-host, test-art-target.
Change-Id: Ibab0d51f537fdecd1d84033197be3ebf5ec4e455
diff --git a/test/684-checker-simd-dotprod/info.txt b/test/684-checker-simd-dotprod/info.txt
new file mode 100644
index 0000000..6c1efb6
--- /dev/null
+++ b/test/684-checker-simd-dotprod/info.txt
@@ -0,0 +1 @@
+Functional tests on dot product idiom SIMD vectorization.