A64: Implement Smi support in MathAbs

src/a64/lithium-codegen-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 3474 matching lines @@
   __ EnumLengthSmi(result, map);
 }
 
 
 void LCodeGen::DoMathAbs(LMathAbs* instr) {
   Representation r = instr->hydrogen()->value()->representation();
   if (r.IsDouble()) {
     DoubleRegister input = ToDoubleRegister(instr->value());
     DoubleRegister result = ToDoubleRegister(instr->result());
     __ Fabs(result, input);
-  } else {
-    ASSERT(r.IsInteger32());
-    Register input = ToRegister32(instr->value());
-    Register result = ToRegister32(instr->result());
+  } else if (r.IsSmi() || r.IsInteger32()) {
+    Register input = r.IsSmi() ? ToRegister(instr->value())
+                               : ToRegister32(instr->value());
+    Register result = r.IsSmi() ? ToRegister(instr->result())
+                                : ToRegister32(instr->result());
     Label done;
     __ Abs(result, input, NULL, &done);
     Deoptimize(instr->environment());
     __ Bind(&done);
   }
 }
 
 
 void LCodeGen::DoDeferredMathAbsTagged(LMathAbsTagged* instr,
                                        Label* exit,
@@ skipping 2038 matching lines @@
   __ Bind(&out_of_object);
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal