[interpreter] Unify meaning of register count operands.

src/compiler/interpreter-assembler.cc

Index: src/compiler/interpreter-assembler.cc
diff --git a/src/compiler/interpreter-assembler.cc b/src/compiler/interpreter-assembler.cc
index 8ca460e8a189a575d1492b8429a95cc57dd42eb5..4fd222c6aaa53eb47f3e1bb07c8a781aac7a74f6 100644
--- a/src/compiler/interpreter-assembler.cc
+++ b/src/compiler/interpreter-assembler.cc
@@ -371,6 +371,9 @@ Node* InterpreterAssembler::IntPtrSub(Node* a, Node* b) {
   return raw_assembler_->IntPtrSub(a, b);
 }
 
+Node* InterpreterAssembler::Int32Sub(Node* a, Node* b) {
+  return raw_assembler_->Int32Sub(a, b);
+}
 
 Node* InterpreterAssembler::WordShl(Node* value, int shift) {
   return raw_assembler_->WordShl(value, Int32Constant(shift));