Support hardware divide instruction

Bug: 11299025

Uses sdiv for division and a combo of sdiv, mul and sub for modulus.
Only does this on processors that are capable of the sdiv instruction, as determined
by the build system.

Also provides a command line arg --instruction-set-features= to allow cross compilation.
Makefile adds the --instruction-set-features= arg to build-time dex2oat runs and defaults
it to something obtained from the target architecture.

Provides a GetInstructionSetFeatures() function on CompilerDriver that can be
queried for various features.  The only feature supported right now is hasDivideInstruction().

Also adds a few more instructions to the ARM disassembler

b/11535253 is an addition to this CL to be done later.

Change-Id: Ia8aaf801fd94bc71e476902749cf20f74eba9f68

1 files changed, 8 insertions, 2 deletions

diff --git a/compiler/driver/compiler_driver.h b/compiler/driver/compiler_driver.h
index 9b9a884339..9321f06526 100644
--- a/compiler/driver/compiler_driver.h
+++ b/compiler/driver/compiler_driver.h
@@ -91,6 +91,7 @@ class CompilerDriver {
   // can assume will be in the image, with NULL implying all available
   // classes.
   explicit CompilerDriver(CompilerBackend compiler_backend, InstructionSet instruction_set,
+                          InstructionSetFeatures instruction_set_features,
                           bool image, DescriptorSet* image_classes,
                           size_t thread_count, bool dump_stats);
 
@@ -104,10 +105,14 @@ class CompilerDriver {
   void CompileOne(const mirror::ArtMethod* method, base::TimingLogger& timings)
       SHARED_LOCKS_REQUIRED(Locks::mutator_lock_);
 
-  InstructionSet GetInstructionSet() const {
+  const InstructionSet& GetInstructionSet() const {
     return instruction_set_;
   }
 
+  const InstructionSetFeatures& GetInstructionSetFeatures() const {
+    return instruction_set_features_;
+  }
+
   CompilerBackend GetCompilerBackend() const {
     return compiler_backend_;
   }
@@ -386,7 +391,8 @@ class CompilerDriver {
 
   CompilerBackend compiler_backend_;
 
-  InstructionSet instruction_set_;
+  const InstructionSet instruction_set_;
+  const InstructionSetFeatures instruction_set_features_;
 
   // All class references that require
   mutable ReaderWriterMutex freezing_constructor_lock_ DEFAULT_MUTEX_ACQUIRED_AFTER;