ART: ARM64: Pass ISA features to VIXL macroassembler.

VIXL macroassembler should be initialized properly
to support Armv8.X features in order to emit corresponding
instructions.

Test: codegen_test.cc, relative_patcher_arm64_test.
Test: test-art-host, test-art-target.
Change-Id: I2f9e155c28b4d2252a3cfb19717f5d25824d5e11

1 files changed, 27 insertions, 0 deletions

diff --git a/compiler/optimizing/codegen_test.cc b/compiler/optimizing/codegen_test.cc
index f186191a0f..b5a7c137f6 100644
--- a/compiler/optimizing/codegen_test.cc
+++ b/compiler/optimizing/codegen_test.cc
@@ -823,6 +823,33 @@ TEST_F(CodegenTest, ARM64ParallelMoveResolverSIMD) {
   InternalCodeAllocator code_allocator;
   codegen.Finalize(&code_allocator);
 }
+
+// Check that ART ISA Features are propagated to VIXL for arm64 (using cortex-a75 as example).
+TEST_F(CodegenTest, ARM64IsaVIXLFeaturesA75) {
+  OverrideInstructionSetFeatures(InstructionSet::kArm64, "cortex-a75");
+  HGraph* graph = CreateGraph();
+  arm64::CodeGeneratorARM64 codegen(graph, *compiler_options_);
+  vixl::CPUFeatures* features = codegen.GetVIXLAssembler()->GetCPUFeatures();
+
+  EXPECT_TRUE(features->Has(vixl::CPUFeatures::kCRC32));
+  EXPECT_TRUE(features->Has(vixl::CPUFeatures::kDotProduct));
+  EXPECT_TRUE(features->Has(vixl::CPUFeatures::kFPHalf));
+  EXPECT_TRUE(features->Has(vixl::CPUFeatures::kAtomics));
+}
+
+// Check that ART ISA Features are propagated to VIXL for arm64 (using cortex-a53 as example).
+TEST_F(CodegenTest, ARM64IsaVIXLFeaturesA53) {
+  OverrideInstructionSetFeatures(InstructionSet::kArm64, "cortex-a53");
+  HGraph* graph = CreateGraph();
+  arm64::CodeGeneratorARM64 codegen(graph, *compiler_options_);
+  vixl::CPUFeatures* features = codegen.GetVIXLAssembler()->GetCPUFeatures();
+
+  EXPECT_TRUE(features->Has(vixl::CPUFeatures::kCRC32));
+  EXPECT_FALSE(features->Has(vixl::CPUFeatures::kDotProduct));
+  EXPECT_FALSE(features->Has(vixl::CPUFeatures::kFPHalf));
+  EXPECT_FALSE(features->Has(vixl::CPUFeatures::kAtomics));
+}
+
 #endif
 
 #ifdef ART_ENABLE_CODEGEN_mips