ARM: Add instruction VFPCompareAndSetFlags to macro assembler

src/arm/macro-assembler-arm.h

 // Copyright 2010 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 564 matching lines @@
 
   // Count leading zeros in a 32 bit word.  On ARM5 and later it uses the clz
   // instruction.  On pre-ARM5 hardware this routine gives the wrong answer
   // for 0 (31 instead of 32).  Source and scratch can be the same in which case
   // the source is clobbered.  Source and zeros can also be the same in which
   // case scratch should be a different register.
   void CountLeadingZeros(Register zeros,
                          Register source,
                          Register scratch);
 
+  void VFPCompareAndSetFlags(const DwVfpRegister src1,

[Rodolph Perfetta, 2011/01/10 11:24:10]

Since the instruction sets the flags, the s parameter is meaningless. In fact
the s parameter in the vcmp instruction is also superfluous and probably should
be removed, it is not present in the instruction encoding.

[Søren Thygesen Gjesse, 2011/01/10 12:36:01]

Done.

+                             const DwVfpRegister src2,
+                             const SBit s = LeaveCC,
+                             const Condition cond = al) {
+    vcmp(src1, src2, s, cond);
+    vmrs(pc);

[Rodolph Perfetta, 2011/01/10 11:24:10]

vmrs should be conditional too.

[Søren Thygesen Gjesse, 2011/01/10 12:36:01]

Done.

+  }
+  void VFPCompareAndSetFlags(const DwVfpRegister src1,

[Rodolph Perfetta, 2011/01/10 11:24:10]

As above.

[Søren Thygesen Gjesse, 2011/01/10 12:36:01]

Done.

+                             const double src2,
+                             const SBit s = LeaveCC,
+                             const Condition cond = al) {
+    vcmp(src1, src2, s, cond);
+    vmrs(pc);
+  }
+
   // ---------------------------------------------------------------------------
   // Runtime calls
 
   // Call a code stub.
   void CallStub(CodeStub* stub, Condition cond = al);
 
   // Call a code stub.
   void TailCallStub(CodeStub* stub, Condition cond = al);
 
   // Call a runtime routine.
@@ skipping 228 matching lines @@
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_ARM_MACRO_ASSEMBLER_ARM_H_