Add opcodes for volatile field accesses

This adds instructions for {i,s}{get,put}{,-object}-volatile, for a
total of eight new instructions.

On SMP systems, these instructions will be substituted in for existing
field access instructions, either by dexopt or during just-in-time
verification.  Unlike the wide-volatile instructions, these will not be
used at all when the VM is not built for SMP.

(Ideally we'd omit the volatile instruction implementations entirely on
non-SMP builds, but that requires a little work in gen-mterp.py.)

The change defines and implements the opcodes and support methods, but
does not cause them to be used.

Also, changed dvmQuasiAtomicRead64's argument to be const.

Change-Id: I9e44fe881e87f27aa41f6c6e898ec4402cb5493e

1 files changed, 8 insertions, 8 deletions

diff --git a/vm/compiler/Dataflow.c b/vm/compiler/Dataflow.c
index fe04c6733..108420129 100644
--- a/vm/compiler/Dataflow.c
+++ b/vm/compiler/Dataflow.c
@@ -710,19 +710,19 @@ int dvmCompilerDataFlowAttributes[kMirOpLast] = {
     // E2 OP_USHR_INT_LIT8 vAA, vBB, #+CC
     DF_DA | DF_UB,
 
-    // E3 OP_UNUSED_E3
+    // E3 OP_IGET_VOLATILE
     DF_NOP,
 
-    // E4 OP_UNUSED_E4
+    // E4 OP_IPUT_VOLATILE
     DF_NOP,
 
-    // E5 OP_UNUSED_E5
+    // E5 OP_SGET_VOLATILE
     DF_NOP,
 
-    // E6 OP_UNUSED_E6
+    // E6 OP_SPUT_VOLATILE
     DF_NOP,
 
-    // E7 OP_UNUSED_E7
+    // E7 OP_IGET_OBJECT_VOLATILE
     DF_NOP,
 
     // E8 OP_IGET_WIDE_VOLATILE
@@ -785,13 +785,13 @@ int dvmCompilerDataFlowAttributes[kMirOpLast] = {
     // FB OP_INVOKE_SUPER_QUICK_RANGE
     DF_FORMAT_3RC,
 
-    // FC OP_UNUSED_FC
+    // FC OP_IPUT_OBJECT_VOLATILE
     DF_NOP,
 
-    // FD OP_UNUSED_FD
+    // FD OP_SGET_OBJECT_VOLATILE
     DF_NOP,
 
-    // FE OP_UNUSED_FE
+    // FE OP_SPUT_OBJECT_VOLATILE
     DF_NOP,
 
     // FF OP_UNUSED_FF