Rename some x64 macros to be more precise about their semantics.

test/cctest/test-macro-assembler-x64.cc

 // Copyright 2009 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 501 matching lines @@
   __ incq(rax);
   __ xor_(rcx, Immediate(kSmiTagMask));
   cond = masm->CheckSmi(rcx);
   __ j(cond, &exit);
 
   // CheckPositiveSmi
 
   __ incq(rax);
   __ movl(rcx, Immediate(0));
   __ Integer32ToSmi(rcx, rcx);
-  cond = masm->CheckPositiveSmi(rcx);  // Zero counts as positive.
+  cond = masm->CheckNonNegativeSmi(rcx);
   __ j(NegateCondition(cond), &exit);
 
   __ incq(rax);
   __ xor_(rcx, Immediate(kSmiTagMask));
-  cond = masm->CheckPositiveSmi(rcx);  // "zero" non-smi.
+  cond = masm->CheckNonNegativeSmi(rcx);  // "zero" non-smi.
   __ j(cond, &exit);
 
   __ incq(rax);
   __ movq(rcx, Immediate(-1));
   __ Integer32ToSmi(rcx, rcx);
-  cond = masm->CheckPositiveSmi(rcx);  // Negative smis are not positive.
+  cond = masm->CheckNonNegativeSmi(rcx);  // Negative smis are not positive.
   __ j(cond, &exit);
 
   __ incq(rax);
   __ movq(rcx, Immediate(Smi::kMinValue));
   __ Integer32ToSmi(rcx, rcx);
-  cond = masm->CheckPositiveSmi(rcx);  // Most negative smi is not positive.
+  cond = masm->CheckNonNegativeSmi(rcx);  // Most negative smi is not positive.
   __ j(cond, &exit);
 
   __ incq(rax);
   __ xor_(rcx, Immediate(kSmiTagMask));
-  cond = masm->CheckPositiveSmi(rcx);  // "Negative" non-smi.
+  cond = masm->CheckNonNegativeSmi(rcx);  // "Negative" non-smi.
   __ j(cond, &exit);
 
   __ incq(rax);
   __ movq(rcx, Immediate(Smi::kMaxValue));
   __ Integer32ToSmi(rcx, rcx);
-  cond = masm->CheckPositiveSmi(rcx);  // Most positive smi is positive.
+  cond = masm->CheckNonNegativeSmi(rcx);  // Most positive smi is positive.
   __ j(NegateCondition(cond), &exit);
 
   __ incq(rax);
   __ xor_(rcx, Immediate(kSmiTagMask));
-  cond = masm->CheckPositiveSmi(rcx);  // "Positive" non-smi.
+  cond = masm->CheckNonNegativeSmi(rcx);  // "Positive" non-smi.
   __ j(cond, &exit);
 
   // CheckIsMinSmi
 
   __ incq(rax);
   __ movq(rcx, Immediate(Smi::kMaxValue));
   __ Integer32ToSmi(rcx, rcx);
   cond = masm->CheckIsMinSmi(rcx);
   __ j(cond, &exit);
 
@@ skipping 1899 matching lines @@
   CodeDesc desc;
   masm->GetCode(&desc);
   // Call the function from C++.
   int result = FUNCTION_CAST<F0>(buffer)();
   CHECK_EQ(0, result);
 }
 
 
 
 #undef __