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

runtime/vm/assembler_x64.cc

 // Copyright (c) 2013, 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/heap.h"
 #include "vm/memory_region.h"
@@ skipping 2063 matching lines @@
   static const struct ALIGN16 {
     uint64_t a;
     uint64_t b;
   } double_abs_constant =
       {0x7FFFFFFFFFFFFFFFLL, 0x7FFFFFFFFFFFFFFFLL};
   movq(TMP, Immediate(reinterpret_cast<intptr_t>(&double_abs_constant)));
   andpd(reg, Address(TMP, 0));
 }
 
 
-void Assembler::DoubleRound(XmmRegister dst, XmmRegister src, XmmRegister tmp) {
-  ASSERT(tmp != src);
-  static double kZeroFiveConst = 0.5;
-  static double kNegZeroFiveConst = -0.5;
-  static double kOneConst = 1.0;
-  static double kNegOneConst = -1.0;
-  Label is_negative, round;
-  if (src != dst) {
-    movsd(dst, src);
-  }
-  // Special handling: 0.5 -> 1.0, -0.5 -> -1.0;
-  Label done, equal_point5, equal_neg_point5;
-  movq(TMP, Immediate(reinterpret_cast<intptr_t>(&kZeroFiveConst)));
-  movsd(tmp, Address(TMP, 0));
-  comisd(tmp, dst);
-  j(EQUAL, &equal_point5, Assembler::kNearJump);
-  movq(TMP, Immediate(reinterpret_cast<intptr_t>(&kNegZeroFiveConst)));
-  movsd(tmp, Address(TMP, 0));
-  comisd(tmp, dst);
-  j(EQUAL, &equal_neg_point5, Assembler::kNearJump);
-
-  roundsd(dst, dst, Assembler::kRoundToNearest);
-  jmp(&done, Assembler::kNearJump);
-
-  Bind(&equal_point5);
-  movq(TMP, Immediate(reinterpret_cast<intptr_t>(&kOneConst)));
-  movsd(dst, Address(TMP, 0));
-  jmp(&done);
-
-  Bind(&equal_neg_point5);
-  movq(TMP, Immediate(reinterpret_cast<intptr_t>(&kNegOneConst)));
-  movsd(dst, Address(TMP, 0));
-  Bind(&done);
-}
-
-
 void Assembler::Stop(const char* message) {
   int64_t message_address = reinterpret_cast<int64_t>(message);
   if (FLAG_print_stop_message) {
     pushq(TMP);  // Preserve TMP register.
     pushq(RDI);  // Preserve RDI register.
     movq(RDI, Immediate(message_address));
     call(&StubCode::PrintStopMessageLabel());
     popq(RDI);  // Restore RDI register.
     popq(TMP);  // Restore TMP register.
   } else {
@@ skipping 311 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64