Inline Math.sqrt in new compilers.

runtime/vm/assembler_x64_test.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/os.h"
 #include "vm/unit_test.h"
@@ skipping 1259 matching lines @@
 
 
 ASSEMBLER_TEST_RUN(TestNot, entry) {
   typedef int (*TestNot)();
   unsigned int res = reinterpret_cast<TestNot>(entry)();
   EXPECT_EQ(0xFFFFFFFF, res);
 }
 
 
 ASSEMBLER_TEST_GENERATE(XorpdZeroing, assembler) {
-  __ movsd(XMM0, Address(RSP, kWordSize));
-  __ xorpd(XMM0, Address(RSP, kWordSize));
-  __ movq(RAX, Immediate(999));
+  __ pushq(RAX);
+  __ movsd(Address(RSP, 0), XMM0);
+  __ xorpd(XMM0, Address(RSP, 0));
+  __ popq(RAX);
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(XorpdZeroing, entry) {
   typedef double (*XorpdZeroingCode)(double d);
   double res = reinterpret_cast<XorpdZeroingCode>(entry)(12.56e3);
   EXPECT_FLOAT_EQ(0.0, res, 0.0001);
 }
 
+
+ASSEMBLER_TEST_GENERATE(SquareRootDouble, assembler) {
+  __ sqrtsd(XMM0, XMM0);
+  __ ret();
+}
+
+
+ASSEMBLER_TEST_RUN(SquareRootDouble, entry) {
+  typedef double (*SquareRootDoubleCode)(double d);
+  const double kDoubleConst = .7;
+  double res = reinterpret_cast<SquareRootDoubleCode>(entry)(kDoubleConst);
+  EXPECT_FLOAT_EQ(sqrt(kDoubleConst), res, 0.0001);
+}
+
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64