X64: Convert HeapNumbers that contain valid smi values to smis in binop-stub.

src/x64/macro-assembler-x64.h

 // Copyright 2011 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 305 matching lines @@
   void PositiveSmiTimesPowerOfTwoToInteger64(Register dst,
                                              Register src,
                                              int power);
 
   // Divide a positive smi's integer value by a power of two.
   // Provides result as 32-bit integer value.
   void PositiveSmiDivPowerOfTwoToInteger32(Register dst,
                                            Register src,
                                            int power);
 
+  // Perform the logical or of two smi values and return a smi value.
+  // If either argument is not a smi, jump to on_not_smis and retain
+  // the original values of source registers. The destination register
+  // may be changed if it's not one of the source registers.
+  template <typename LabelType>
+  void SmiOrIfSmis(Register dst,
+                   Register src1,
+                   Register src2,
+                   LabelType* on_not_smis);
+
 
   // Simple comparison of smis.  Both sides must be known smis to use these,
   // otherwise use Cmp.
   void SmiCompare(Register smi1, Register smi2);
   void SmiCompare(Register dst, Smi* src);
   void SmiCompare(Register dst, const Operand& src);
   void SmiCompare(const Operand& dst, Register src);
   void SmiCompare(const Operand& dst, Smi* src);
   // Compare the int32 in src register to the value of the smi stored at dst.
   void SmiCompareInteger32(const Operand& dst, Register src);
@@ skipping 1447 matching lines @@
 template <typename LabelType>
 void MacroAssembler::JumpUnlessBothNonNegativeSmi(Register src1,
                                                   Register src2,
                                                   LabelType* on_not_both_smi) {
   Condition both_smi = CheckBothNonNegativeSmi(src1, src2);
   j(NegateCondition(both_smi), on_not_both_smi);
 }
 
 
 template <typename LabelType>
+void MacroAssembler::SmiOrIfSmis(Register dst, Register src1, Register src2,
+                                 LabelType* on_not_smis) {
+  if (dst.is(src1) || dst.is(src2)) {
+    ASSERT(!src1.is(kScratchRegister));
+    ASSERT(!src2.is(kScratchRegister));
+    movq(kScratchRegister, src1);
+    or_(kScratchRegister, src2);
+    JumpIfNotSmi(kScratchRegister, on_not_smis);
+    movq(dst, kScratchRegister);
+  } else {
+    movq(dst, src1);
+    or_(dst, src2);
+    JumpIfNotSmi(dst, on_not_smis);
+  }
+}
+
+
+template <typename LabelType>
 void MacroAssembler::JumpIfNotString(Register object,
                                      Register object_map,
                                      LabelType* not_string) {
   Condition is_smi = CheckSmi(object);
   j(is_smi, not_string);
   CmpObjectType(object, FIRST_NONSTRING_TYPE, object_map);
   j(above_equal, not_string);
 }
 
 
@@ skipping 176 matching lines @@
       Jump(adaptor, RelocInfo::CODE_TARGET);
     }
     bind(&invoke);
   }
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_X64_MACRO_ASSEMBLER_X64_H_