Inline Math.fround in optimized code.

src/ia32/lithium-codegen-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_IA32
 
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 3706 matching lines @@
     __ movmskpd(output_reg, input_reg);
     __ test(output_reg, Immediate(1));
     __ RecordComment("Minus zero");
     DeoptimizeIf(not_zero, instr->environment());
   }
   __ Move(output_reg, Immediate(0));
   __ bind(&done);
 }
 
 
+void LCodeGen::DoMathFround(LMathFround* instr) {
+  XMMRegister input_reg = ToDoubleRegister(instr->value());
+  XMMRegister output_reg = ToDoubleRegister(instr->result());
+  __ cvtsd2ss(output_reg, input_reg);
+  __ cvtss2sd(output_reg, output_reg);
+}
+
+
 void LCodeGen::DoMathSqrt(LMathSqrt* instr) {
   Operand input = ToOperand(instr->value());
   XMMRegister output = ToDoubleRegister(instr->result());
   __ sqrtsd(output, input);
 }
 
 
 void LCodeGen::DoMathPowHalf(LMathPowHalf* instr) {
   XMMRegister xmm_scratch = double_scratch0();
   XMMRegister input_reg = ToDoubleRegister(instr->value());
@@ skipping 1930 matching lines @@
   CallRuntime(Runtime::kPushBlockContext, 2, instr);
   RecordSafepoint(Safepoint::kNoLazyDeopt);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32