tree 533cf9a77046a49525d916043a58949e59319f2d
parent 67f128a4023bbbe55827dd2c11ed0538ee387233
author Dave Allison <dallison@google.com> 1382489539 -0700
committer Dave Allison <dallison@google.com> 1383698933 -0800

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