commit 4d17987da58d9411adbed1a18203d76d6119612d
author Vladimir Marko <vmarko@google.com> Fri Jan 19 14:50:10 2018 +0000
committer Vladimir Marko <vmarko@google.com> Mon Jan 22 18:35:16 2018 +0000
tree f2953a0eb3ebc3f8533d22c14f4a09d7f0d4168d
parent e57043081e6b091a9fd23a84043373148ae72f1f

ART: Add entrypoint and intrinsic for Math.pow().

MathBenchmarks.java#timePow results on taimen's little cores
fixed at frequency 1401600 with forced JIT compilation:
  - before:
    - X32: 356.33 (@FastNative), 315.39 (@CriticalNative)
    - X64: 357.31 (@FastNative), 315.37 (@CriticalNative)
  - after (LICM defeats the benchmark):
    - X32: 2.88
    - X64: 2.87
  - after but with kAllSideEffects to prevent LICM:
    - X32: 275.42
    - X64: 275.67

Test: Rely on TreeHugger.
Bug: 70727450
Change-Id: Iaa31f70acabbd57c163cfeafe02eed67c1348861

runtime/entrypoints_order_test.cc

diff --git a/runtime/entrypoints_order_test.cc b/runtime/entrypoints_order_test.cc
index 7c912d0..1fdf439 100644
--- a/runtime/entrypoints_order_test.cc
+++ b/runtime/entrypoints_order_test.cc
@@ -238,7 +238,8 @@
     EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pAcos, pAsin, sizeof(void*));
     EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pAsin, pAtan, sizeof(void*));
     EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pAtan, pAtan2, sizeof(void*));
-    EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pAtan2, pCbrt, sizeof(void*));
+    EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pAtan2, pPow, sizeof(void*));
+    EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pPow, pCbrt, sizeof(void*));
     EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pCbrt, pCosh, sizeof(void*));
     EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pCosh, pExp, sizeof(void*));
     EXPECT_OFFSET_DIFFNP(QuickEntryPoints, pExp, pExpm1, sizeof(void*));