For Doubl erounding call C-function instead of attempting to inline it. Fixes issue 8760.

runtime/vm/assembler_x64_test.cc

 // Copyright (c) 2012, 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 2208 matching lines @@
   typedef double (*DoubleAbsCode)(double d);
   double val = -12.45;
   double res =  reinterpret_cast<DoubleAbsCode>(test->entry())(val);
   EXPECT_FLOAT_EQ(-val, res, 0.001);
   val = 12.45;
   res =  reinterpret_cast<DoubleAbsCode>(test->entry())(val);
   EXPECT_FLOAT_EQ(val, res, 0.001);
 }
 
 
-ASSEMBLER_TEST_GENERATE(DoubleToDoubleRound, assembler) {
-  __ DoubleRound(XMM0, XMM0, XMM1);
-  __ ret();
-}
-
-
-ASSEMBLER_TEST_RUN(DoubleToDoubleRound, test) {
-  typedef double (*DoubleToDoubleRoundCode)(double d);
-  double res = reinterpret_cast<DoubleToDoubleRoundCode>(test->entry())(12.3);
-  EXPECT_EQ(12.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(test->entry())(12.8);
-  EXPECT_EQ(13.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(test->entry())(0.5);
-  EXPECT_EQ(1.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(test->entry())(-12.3);
-  EXPECT_EQ(-12.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(test->entry())(-12.8);
-  EXPECT_EQ(-13.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(test->entry())(-0.5);
-  EXPECT_EQ(-1.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(
-      test->entry())(0.49999999999999994);
-  EXPECT_EQ(0.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(
-      test->entry())(-0.49999999999999994);
-  EXPECT_EQ(-0.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(
-      test->entry())(9007199254740991.0);
-  EXPECT_EQ(9007199254740991.0, res);
-  res = reinterpret_cast<DoubleToDoubleRoundCode>(
-      test->entry())(-9007199254740991.0);
-  EXPECT_EQ(-9007199254740991.0, res);
-}
-
-
 ASSEMBLER_TEST_GENERATE(ExtractSignBits, assembler) {
   __ movmskpd(RAX, XMM0);
   __ andq(RAX, Immediate(0x1));
   __ ret();
 }
 
 
 ASSEMBLER_TEST_RUN(ExtractSignBits, test) {
   typedef int (*ExtractSignBits)(double d);
   int res = reinterpret_cast<ExtractSignBits>(test->entry())(1.0);
   EXPECT_EQ(0, res);
   res = reinterpret_cast<ExtractSignBits>(test->entry())(-1.0);
   EXPECT_EQ(1, res);
   res = reinterpret_cast<ExtractSignBits>(test->entry())(-0.0);
   EXPECT_EQ(1, res);
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64