Preserves callee-saved FPU registers on ARM

runtime/vm/assembler_arm.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_ARM)
 
 #include "vm/assembler.h"
 #include "vm/longjump.h"
 #include "vm/runtime_entry.h"
@@ skipping 2495 matching lines @@
   ReserveAlignedFrameSpace(frame_space);
 }
 
 
 void Assembler::LeaveCallRuntimeFrame() {
   // SP might have been modified to reserve space for arguments
   // and ensure proper alignment of the stack frame.
   // We need to restore it before restoring registers.
   const intptr_t kPushedRegistersSize =
       kDartVolatileCpuRegCount * kWordSize +
-      kDartVolatileFpuRegCount * 2 * kWordSize;
+      kDartVolatileFpuRegCount * kFpuRegisterSize;
   AddImmediate(SP, FP, -kPushedRegistersSize);
 
   // Restore all volatile FPU registers.
   DRegister firstv = EvenDRegisterOf(kDartFirstVolatileFpuReg);
   DRegister lastv = OddDRegisterOf(kDartLastVolatileFpuReg);
-  if ((lastv - firstv + 1) > 16) {
+  if ((lastv - firstv + 1) >= 16) {
     DRegister mid = static_cast<DRegister>(firstv + 16);
     vldmd(IA_W, SP, firstv, 16);
     vldmd(IA_W, SP, mid, lastv - mid + 1);
   } else {
     vldmd(IA_W, SP, firstv, lastv - firstv + 1);
   }
 
   // Restore volatile CPU registers.
   LeaveFrame(kDartVolatileCpuRegs | (1 << FP) | (1 << LR));
 }
@@ skipping 197 matching lines @@
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfFpuRegisters));
   return fpu_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM