MIPS: Inline Math.fround in optimized code.

src/mips/lithium-codegen-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.7
 // 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 3806 matching lines @@
     __ Branch(&done, ne, result, Operand(zero_reg));
     __ bind(&check_sign_on_zero);
     __ mfc1(scratch, input.high());
     __ And(scratch, scratch, Operand(HeapNumber::kSignMask));
     DeoptimizeIf(ne, instr->environment(), scratch, Operand(zero_reg));
   }
   __ bind(&done);
 }
 
 
+void LCodeGen::DoMathFround(LMathFround* instr) {
+  DoubleRegister input = ToDoubleRegister(instr->value());
+  DoubleRegister result = ToDoubleRegister(instr->result());
+  __ cvt_s_d(result.low(), input);
+  __ cvt_d_s(result, result.low());
+}
+
+
 void LCodeGen::DoMathSqrt(LMathSqrt* instr) {
   DoubleRegister input = ToDoubleRegister(instr->value());
   DoubleRegister result = ToDoubleRegister(instr->result());
   __ sqrt_d(result, input);
 }
 
 
 void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) {
   DoubleRegister input = ToDoubleRegister(instr->value());
   DoubleRegister result = ToDoubleRegister(instr->result());
@@ skipping 2067 matching lines @@
   __ li(at, scope_info);
   __ Push(at, ToRegister(instr->function()));
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal