Revert "Revert "Fast ART x86 interpreter""

This reverts commit 2d093a1213cc2f85b5e5e02782332657c479eb94.

Disable x86 mterp compilation on Mac host builds (but keep enabled
for all target builds).

Change-Id: Ie355279f166d2964a786646ee53f065b7e0f5ede
diff --git a/runtime/interpreter/mterp/x86/op_iput.S b/runtime/interpreter/mterp/x86/op_iput.S
new file mode 100644
index 0000000..f8a6549
--- /dev/null
+++ b/runtime/interpreter/mterp/x86/op_iput.S
@@ -0,0 +1,25 @@
+%default { "handler":"artSet32InstanceFromMterp" }
+/*
+ * General 32-bit instance field put.
+ *
+ * for: iput, iput-object, iput-boolean, iput-byte, iput-char, iput-short
+ */
+    /* op vA, vB, field@CCCC */
+    .extern $handler
+    EXPORT_PC
+    movzwl  2(rPC), %eax                    # eax<- 0000CCCC
+    movl    %eax, OUT_ARG0(%esp)            # field ref CCCC
+    movzbl  rINSTbl, %ecx                   # ecx<- BA
+    sarl    $$4, %ecx                       # ecx<- B
+    GET_VREG %ecx, %ecx
+    movl    %ecx, OUT_ARG1(%esp)            # the object pointer
+    andb    $$0xf, rINSTbl                  # rINST<- A
+    GET_VREG %eax, rINST
+    movl    %eax, OUT_ARG2(%esp)            # fp[A]
+    movl    OFF_FP_METHOD(rFP), %eax
+    movl    %eax, OUT_ARG3(%esp)            # referrer
+    call    $handler
+    testl   %eax, %eax
+    jnz     MterpPossibleException
+    REFRESH_IBASE
+    ADVANCE_PC_FETCH_AND_GOTO_NEXT 2