A64: Implement division in Lithium for smis

src/a64/lithium-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1359 matching lines @@
   return MarkAsCall(new(zone()) LDeclareGlobals(context), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoDeoptimize(HDeoptimize* instr) {
   return AssignEnvironment(new(zone()) LDeoptimize);
 }
 
 
 LInstruction* LChunkBuilder::DoDiv(HDiv* instr) {
-  if (instr->representation().IsInteger32()) {
-    // TODO(all): Update this case to support smi inputs.
+  if (instr->representation().IsSmiOrInteger32()) {
     ASSERT(instr->left()->representation().Equals(instr->representation()));
     ASSERT(instr->right()->representation().Equals(instr->representation()));
+
+    LOperand* dividend = UseRegister(instr->left());
+
     if (instr->RightIsPowerOf2()) {
       ASSERT(!instr->CheckFlag(HValue::kCanBeDivByZero));
-      LOperand* value = UseRegisterAtStart(instr->left());
-      LDivI* div = new(zone()) LDivI(value, UseConstant(instr->right()), NULL);
+      LOperand* divisor = UseConstant(instr->right());
+      LDivConstI* div = new(zone()) LDivConstI(dividend, divisor);
+      return AssignEnvironment(DefineAsRegister(div));
+    } else {
+      LOperand* divisor = UseRegister(instr->right());
+      LOperand* temp1 =
+          instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)
+          ? NULL : TempRegister();
+      LOperand* temp2 = instr->representation().IsSmi() ? TempRegister() : NULL;
+      LOperand* temp3 = instr->representation().IsSmi() ? TempRegister() : NULL;
+
+      LDivI* div = new(zone()) LDivI(dividend, divisor, temp1, temp2, temp3);
       return AssignEnvironment(DefineAsRegister(div));
     }
-    LOperand* dividend = UseRegister(instr->left());
-    LOperand* divisor = UseRegister(instr->right());
-    LOperand* temp = instr->CheckFlag(HInstruction::kAllUsesTruncatingToInt32)
-        ? NULL : TempRegister();
-    LDivI* div = new(zone()) LDivI(dividend, divisor, temp);
-    return AssignEnvironment(DefineAsRegister(div));
   } else if (instr->representation().IsDouble()) {
     return DoArithmeticD(Token::DIV, instr);
   } else {
     return DoArithmeticT(Token::DIV, instr);
   }
 }
 
 
 LInstruction* LChunkBuilder::DoDummyUse(HDummyUse* instr) {
   return DefineAsRegister(new(zone()) LDummyUse(UseAny(instr->value())));
@@ skipping 1036 matching lines @@
 
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegister(instr->receiver());
   LOperand* function = UseRegister(instr->function());
   LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 } }  // namespace v8::internal