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diff --git a/js/src/jit/mips-shared/MoveEmitter-mips-shared.h b/js/src/jit/mips-shared/MoveEmitter-mips-shared.h
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+++ b/js/src/jit/mips-shared/MoveEmitter-mips-shared.h
@@ -0,0 +1,76 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef jit_mips_shared_MoveEmitter_mips_shared_h
+#define jit_mips_shared_MoveEmitter_mips_shared_h
+
+#include "jit/MacroAssembler.h"
+#include "jit/MoveResolver.h"
+
+namespace js {
+namespace jit {
+
+class MoveEmitterMIPSShared
+{
+  protected:
+    uint32_t inCycle_;
+    MacroAssembler& masm;
+
+    // Original stack push value.
+    uint32_t pushedAtStart_;
+
+    // These store stack offsets to spill locations, snapshotting
+    // codegen->framePushed_ at the time they were allocated. They are -1 if no
+    // stack space has been allocated for that particular spill.
+    int32_t pushedAtCycle_;
+    int32_t pushedAtSpill_;
+
+    // These are registers that are available for temporary use. They may be
+    // assigned InvalidReg. If no corresponding spill space has been assigned,
+    // then these registers do not need to be spilled.
+    Register spilledReg_;
+    FloatRegister spilledFloatReg_;
+
+    void assertDone();
+    Register tempReg();
+    FloatRegister tempFloatReg();
+    Address cycleSlot(uint32_t slot, uint32_t subslot = 0) const;
+    int32_t getAdjustedOffset(const MoveOperand& operand);
+    Address getAdjustedAddress(const MoveOperand& operand);
+
+    void emitMove(const MoveOperand& from, const MoveOperand& to);
+    void emitInt32Move(const MoveOperand& from, const MoveOperand& to);
+    void emitFloat32Move(const MoveOperand& from, const MoveOperand& to);
+    virtual void emitDoubleMove(const MoveOperand& from, const MoveOperand& to) = 0;
+    virtual void breakCycle(const MoveOperand& from, const MoveOperand& to,
+                    MoveOp::Type type, uint32_t slot) = 0;
+    virtual void completeCycle(const MoveOperand& from, const MoveOperand& to,
+                       MoveOp::Type type, uint32_t slot) = 0;
+    void emit(const MoveOp& move);
+
+  public:
+    MoveEmitterMIPSShared(MacroAssembler& masm)
+      : inCycle_(0),
+        masm(masm),
+        pushedAtStart_(masm.framePushed()),
+        pushedAtCycle_(-1),
+        pushedAtSpill_(-1),
+        spilledReg_(InvalidReg),
+        spilledFloatReg_(InvalidFloatReg)
+    { }
+    ~MoveEmitterMIPSShared() {
+        assertDone();
+    }
+    void emit(const MoveResolver& moves);
+    void finish();
+
+    void setScratchRegister(Register reg) {}
+};
+
+} // namespace jit
+} // namespace js
+
+#endif /* jit_mips_shared_MoveEmitter_mips_shared_h */