[Interpreter] Add an unsigned immediate operand type

src/interpreter/interpreter-assembler.h

Index: src/interpreter/interpreter-assembler.h
diff --git a/src/interpreter/interpreter-assembler.h b/src/interpreter/interpreter-assembler.h
index 1a78f543f7df3b08f32b88aaf8a9829b8006ccab..97643c123e2acb6e88f63c6563442c68e8f0cae2 100644
--- a/src/interpreter/interpreter-assembler.h
+++ b/src/interpreter/interpreter-assembler.h
@@ -32,6 +32,9 @@ class InterpreterAssembler : public CodeStubAssembler {
   // Returns the index immediate for bytecode operand |operand_index| in the
   // current bytecode.
   compiler::Node* BytecodeOperandIdx(int operand_index);
+  // Returns the UImm8 immediate for bytecode operand |operand_index| in the
+  // current bytecode.
+  compiler::Node* BytecodeOperandUImm(int operand_index);
   // Returns the Imm8 immediate for bytecode operand |operand_index| in the
   // current bytecode.
   compiler::Node* BytecodeOperandImm(int operand_index);