# HG changeset patch
# User Josef Eisl <josef.eisl@jku.at>
# Date 1434716894 -7200
# Node ID e38161633db6f70f121e346834924adff8347193
# Parent  5de4a002d0974c9a20ea040b9f885deb4b6ba3c1
AMD64Move: add AMD64MultiStackMove.

diff -r 5de4a002d097 -r e38161633db6 graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Move.java
--- a/graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Move.java	Sun Jun 21 18:53:42 2015 +0200
+++ b/graal/com.oracle.graal.lir.amd64/src/com/oracle/graal/lir/amd64/AMD64Move.java	Fri Jun 19 14:28:14 2015 +0200
@@ -143,6 +143,14 @@
             return result;
         }
 
+        public Register getScratchRegister() {
+            return scratch;
+        }
+
+        public StackSlotValue getBackupSlot() {
+            return backupSlot;
+        }
+
         @Override
         public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
             // backup scratch register
@@ -156,6 +164,41 @@
         }
     }
 
+    @Opcode("MULTISTACKMOVE")
+    public static final class AMD64MultiStackMove extends AMD64LIRInstruction {
+        public static final LIRInstructionClass<AMD64MultiStackMove> TYPE = LIRInstructionClass.create(AMD64MultiStackMove.class);
+
+        @Def({STACK}) protected AllocatableValue[] results;
+        @Use({STACK}) protected Value[] inputs;
+        @Alive({OperandFlag.STACK, OperandFlag.UNINITIALIZED}) private StackSlotValue backupSlot;
+
+        private Register scratch;
+
+        public AMD64MultiStackMove(AllocatableValue[] results, Value[] inputs, Register scratch, StackSlotValue backupSlot) {
+            super(TYPE);
+            this.results = results;
+            this.inputs = inputs;
+            this.backupSlot = backupSlot;
+            this.scratch = scratch;
+        }
+
+        @Override
+        public void emitCode(CompilationResultBuilder crb, AMD64MacroAssembler masm) {
+            // backup scratch register
+            move(backupSlot.getKind(), crb, masm, backupSlot, scratch.asValue(backupSlot.getLIRKind()));
+            for (int i = 0; i < results.length; i++) {
+                Value input = inputs[i];
+                AllocatableValue result = results[i];
+                // move stack slot
+                move(input.getKind(), crb, masm, scratch.asValue(input.getLIRKind()), input);
+                move(result.getKind(), crb, masm, result, scratch.asValue(result.getLIRKind()));
+            }
+            // restore scratch register
+            move(backupSlot.getKind(), crb, masm, scratch.asValue(backupSlot.getLIRKind()), backupSlot);
+
+        }
+    }
+
     @Opcode("STACKMOVE")
     public static final class AMD64PushPopStackMove extends AMD64LIRInstruction implements MoveOp {
         public static final LIRInstructionClass<AMD64PushPopStackMove> TYPE = LIRInstructionClass.create(AMD64PushPopStackMove.class);