[interpreter] Create custom call opcodes for specific argument counts

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 0020477cd7eeab1ed0fafb780b0870ef90801024..96c73e912703ecc9b799b2669946971e0c9a9131 100644
--- a/src/interpreter/interpreter-assembler.h
+++ b/src/interpreter/interpreter-assembler.h
@@ -32,6 +32,9 @@ class V8_EXPORT_PRIVATE InterpreterAssembler : public CodeStubAssembler {
   compiler::Node* BytecodeOperandFlag(int operand_index);
   // Returns the 32-bit zero-extended index immediate for bytecode operand
   // |operand_index| in the current bytecode.
+  compiler::Node* BytecodeOperandIdxInt32(int operand_index);
+  // Returns the word zero-extended index immediate for bytecode operand
+  // |operand_index| in the current bytecode.
   compiler::Node* BytecodeOperandIdx(int operand_index);
   // Returns the smi index immediate for bytecode operand |operand_index|
   // in the current bytecode.