Implement a few more features on ARM.

runtime/vm/flow_graph_compiler_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"  // Needed here to get TARGET_ARCH_ARM.
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "lib/error.h"
@@ skipping 1398 matching lines @@
 
 
 void FlowGraphCompiler::EmitSuperEqualityCallPrologue(Register result,
                                                       Label* skip_call) {
   UNIMPLEMENTED();
 }
 
 
 void FlowGraphCompiler::SaveLiveRegisters(LocationSummary* locs) {
   // TODO(vegorov): consider saving only caller save (volatile) registers.
-  const intptr_t fpu_registers = locs->live_registers()->fpu_registers();
-  if (fpu_registers > 0) {
-    UNIMPLEMENTED();
+  const intptr_t fpu_regs_count = locs->live_registers()->fpu_regs_count();
+  if (fpu_regs_count > 0) {
+    __ AddImmediate(SP, -(fpu_regs_count * kFpuRegisterSize));
+    // Store fpu registers with the lowest register number at the lowest
+    // address.
+    intptr_t offset = 0;
+    for (intptr_t reg_idx = 0; reg_idx < kNumberOfFpuRegisters; ++reg_idx) {
+      DRegister fpu_reg = static_cast<DRegister>(reg_idx);
+      if (locs->live_registers()->ContainsFpuRegister(fpu_reg)) {
+        __ vstrd(fpu_reg, Address(SP, offset));
+        offset += kFpuRegisterSize;
+      }
+    }
+    ASSERT(offset == (fpu_regs_count * kFpuRegisterSize));
   }
 
   // Store general purpose registers with the lowest register number at the
   // lowest address.
   const intptr_t cpu_registers = locs->live_registers()->cpu_registers();
   ASSERT((cpu_registers & ~kAllCpuRegistersList) == 0);
   if (cpu_registers != 0) {
     __ PushList(cpu_registers);
   }
 }
 
 
 void FlowGraphCompiler::RestoreLiveRegisters(LocationSummary* locs) {
   // General purpose registers have the lowest register number at the
   // lowest address.
   const intptr_t cpu_registers = locs->live_registers()->cpu_registers();
   ASSERT((cpu_registers & ~kAllCpuRegistersList) == 0);
   if (cpu_registers != 0) {
     __ PopList(cpu_registers);
   }
 
-  const intptr_t fpu_registers = locs->live_registers()->fpu_registers();
-  if (fpu_registers > 0) {
-    UNIMPLEMENTED();
+  const intptr_t fpu_regs_count = locs->live_registers()->fpu_regs_count();
+  if (fpu_regs_count > 0) {
+    // Fpu registers have the lowest register number at the lowest address.
+    intptr_t offset = 0;
+    for (intptr_t reg_idx = 0; reg_idx < kNumberOfFpuRegisters; ++reg_idx) {
+      DRegister fpu_reg = static_cast<DRegister>(reg_idx);
+      if (locs->live_registers()->ContainsFpuRegister(fpu_reg)) {
+        __ vldrd(fpu_reg, Address(SP, offset));
+        offset += kFpuRegisterSize;
+      }
+    }
+    ASSERT(offset == (fpu_regs_count * kFpuRegisterSize));
+    __ AddImmediate(SP, offset);
   }
 }
 
 
 void FlowGraphCompiler::EmitTestAndCall(const ICData& ic_data,
                                         Register class_id_reg,
                                         intptr_t argument_count,
                                         const Array& argument_names,
                                         Label* deopt,
                                         intptr_t deopt_id,
@@ skipping 274 matching lines @@
 void ParallelMoveResolver::RestoreFpuScratch(FpuRegister reg) {
   __ vldrd(reg, Address(SP, kDoubleSize, Address::PostIndex));
 }
 
 
 #undef __
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM