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, 3 insertions, 0 deletions

diff --git a/compiler/dex/compiler_ir.h b/compiler/dex/compiler_ir.h
index 0d7209e..fd46975 100644
--- a/compiler/dex/compiler_ir.h
+++ b/compiler/dex/compiler_ir.h
@@ -97,6 +97,9 @@ struct CompilationUnit {
   CompilerBackend compiler_backend;
   InstructionSet instruction_set;
 
+  const InstructionSetFeatures& GetInstructionSetFeatures() {
+    return compiler_driver->GetInstructionSetFeatures();
+  }
   // TODO: much of this info available elsewhere.  Go to the original source?
   uint16_t num_dalvik_registers;        // method->registers_size.
   const uint16_t* insns;