[Interpreter] Move globals to use idx16 operand for slot id.

src/interpreter/bytecode-array-builder.cc

Index: src/interpreter/bytecode-array-builder.cc
diff --git a/src/interpreter/bytecode-array-builder.cc b/src/interpreter/bytecode-array-builder.cc
index 7a8954ffe63caba1e5ae9f6cd60b6642c5f6f031..b6880af6aab38cb08b8b434b4309a77bcc55ef19 100644
--- a/src/interpreter/bytecode-array-builder.cc
+++ b/src/interpreter/bytecode-array-builder.cc
@@ -254,8 +254,8 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::StoreAccumulatorInRegister(
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::LoadGlobal(int slot_index) {
   DCHECK(slot_index >= 0);
-  if (FitsInIdx8Operand(slot_index)) {
-    Output(Bytecode::kLdaGlobal, static_cast<uint8_t>(slot_index));
+  if (FitsInIdx16Operand(slot_index)) {
+    Output(Bytecode::kLdaGlobal, static_cast<uint16_t>(slot_index));
   } else {
     UNIMPLEMENTED();
   }
@@ -267,7 +267,7 @@ BytecodeArrayBuilder& BytecodeArrayBuilder::StoreGlobal(
     int slot_index, LanguageMode language_mode) {
   DCHECK(slot_index >= 0);
   Bytecode bytecode = BytecodeForStoreGlobal(language_mode);
-  if (FitsInIdx8Operand(slot_index)) {
+  if (FitsInIdx16Operand(slot_index)) {
     Output(bytecode, static_cast<uint8_t>(slot_index));
   } else {
     UNIMPLEMENTED();