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diff --git a/js/src/jit/mips64/CodeGenerator-mips64.h b/js/src/jit/mips64/CodeGenerator-mips64.h
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+++ b/js/src/jit/mips64/CodeGenerator-mips64.h
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+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * 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_mips64_CodeGenerator_mips64_h
+#define jit_mips64_CodeGenerator_mips64_h
+
+#include "jit/mips-shared/CodeGenerator-mips-shared.h"
+
+namespace js {
+namespace jit {
+
+class CodeGeneratorMIPS64 : public CodeGeneratorMIPSShared {
+ protected:
+  CodeGeneratorMIPS64(MIRGenerator* gen, LIRGraph* graph, MacroAssembler* masm)
+      : CodeGeneratorMIPSShared(gen, graph, masm) {}
+
+  void testNullEmitBranch(Assembler::Condition cond, const ValueOperand& value,
+                          MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
+    MOZ_ASSERT(value.valueReg() != SecondScratchReg);
+    masm.splitTag(value.valueReg(), SecondScratchReg);
+    emitBranch(SecondScratchReg, ImmTag(JSVAL_TAG_NULL), cond, ifTrue, ifFalse);
+  }
+  void testUndefinedEmitBranch(Assembler::Condition cond,
+                               const ValueOperand& value, MBasicBlock* ifTrue,
+                               MBasicBlock* ifFalse) {
+    MOZ_ASSERT(value.valueReg() != SecondScratchReg);
+    masm.splitTag(value.valueReg(), SecondScratchReg);
+    emitBranch(SecondScratchReg, ImmTag(JSVAL_TAG_UNDEFINED), cond, ifTrue,
+               ifFalse);
+  }
+  void testObjectEmitBranch(Assembler::Condition cond,
+                            const ValueOperand& value, MBasicBlock* ifTrue,
+                            MBasicBlock* ifFalse) {
+    MOZ_ASSERT(value.valueReg() != SecondScratchReg);
+    masm.splitTag(value.valueReg(), SecondScratchReg);
+    emitBranch(SecondScratchReg, ImmTag(JSVAL_TAG_OBJECT), cond, ifTrue,
+               ifFalse);
+  }
+
+  void emitBigIntDiv(LBigIntDiv* ins, Register dividend, Register divisor,
+                     Register output, Label* fail);
+  void emitBigIntMod(LBigIntMod* ins, Register dividend, Register divisor,
+                     Register output, Label* fail);
+
+  template <typename T>
+  void emitWasmLoadI64(T* ins);
+  template <typename T>
+  void emitWasmStoreI64(T* ins);
+
+  ValueOperand ToValue(LInstruction* ins, size_t pos);
+  ValueOperand ToTempValue(LInstruction* ins, size_t pos);
+
+  // Functions for LTestVAndBranch.
+  void splitTagForTest(const ValueOperand& value, ScratchTagScope& tag);
+};
+
+typedef CodeGeneratorMIPS64 CodeGeneratorSpecific;
+
+}  // namespace jit
+}  // namespace js
+
+#endif /* jit_mips64_CodeGenerator_mips64_h */