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
diff --git a/compiler/driver/compiler_driver.h b/compiler/driver/compiler_driver.h
index 9b9a884..9321f06 100644
--- a/compiler/driver/compiler_driver.h
+++ b/compiler/driver/compiler_driver.h
@@ -91,6 +91,7 @@
// 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 @@
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 @@
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;