tree a9feb49c87ae2ec5cde2dd45913840e1f9977ade
parent 9623c6668962559e818d1e7f05a58dcb96c71fa9
author Vladimir Kostyukov <vladimir.kostyukov@intel.com> 1397551307 +0700
committer Vladimir Kostyukov <vladimir.kostyukov@intel.com> 1397715450 +0700

ART: Fixes an issue with REX prefix for instructions with no ModRM byte

There are instructions (such as push, pop, mov) in the x86 ISA
that encode first operands in their opcodes (opcode + reg).
In order to enable an extended 64bit registers (R9-R15) a special
prefix REX.B should be emitted before such instructions.

This patch fixes the issue when REX.R prefix was emitted before
instructions with no MorRM byte. So, the REX-prefix was simply
ignored by CPU for those instructions whose operands are encoded
in their opcodes.

This patch makes the jni_compiler_test passed with JNI compiler
enabled for x86_64 target.

Change-Id: Ib84da1cf9f8ff96bd7afd4e0fc53078f3231f8ec
Signed-off-by: Vladimir Kostyukov <vladimir.kostyukov@intel.com>