Merge 6800:7180 from the bleeding edge branch to the experimental/gc branch.

src/arm/simulator-arm.cc

Index: src/arm/simulator-arm.cc
===================================================================
--- src/arm/simulator-arm.cc	(revision 7180)
+++ src/arm/simulator-arm.cc	(working copy)
@@ -1005,7 +1005,9 @@
     intptr_t* ptr = reinterpret_cast<intptr_t*>(addr);
     return *ptr;
   }
-  PrintF("Unaligned read at 0x%08x, pc=%p\n", addr, instr);
+  PrintF("Unaligned read at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+         addr,
+         reinterpret_cast<intptr_t>(instr));
   UNIMPLEMENTED();
   return 0;
 #endif
@@ -1023,7 +1025,9 @@
     *ptr = value;
     return;
   }
-  PrintF("Unaligned write at 0x%08x, pc=%p\n", addr, instr);
+  PrintF("Unaligned write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+         addr,
+         reinterpret_cast<intptr_t>(instr));
   UNIMPLEMENTED();
 #endif
 }
@@ -1038,7 +1042,9 @@
     uint16_t* ptr = reinterpret_cast<uint16_t*>(addr);
     return *ptr;
   }
-  PrintF("Unaligned unsigned halfword read at 0x%08x, pc=%p\n", addr, instr);
+  PrintF("Unaligned unsigned halfword read at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+         addr,
+         reinterpret_cast<intptr_t>(instr));
   UNIMPLEMENTED();
   return 0;
 #endif
@@ -1072,7 +1078,9 @@
     *ptr = value;
     return;
   }
-  PrintF("Unaligned unsigned halfword write at 0x%08x, pc=%p\n", addr, instr);
+  PrintF("Unaligned unsigned halfword write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+         addr,
+         reinterpret_cast<intptr_t>(instr));
   UNIMPLEMENTED();
 #endif
 }
@@ -1089,7 +1097,9 @@
     *ptr = value;
     return;
   }
-  PrintF("Unaligned halfword write at 0x%08x, pc=%p\n", addr, instr);
+  PrintF("Unaligned halfword write at 0x%08x, pc=0x%08" V8PRIxPTR "\n",
+         addr,
+         reinterpret_cast<intptr_t>(instr));
   UNIMPLEMENTED();
 #endif
 }
@@ -1531,8 +1541,12 @@
 
 // This signature supports direct call in to API function native callback
 // (refer to InvocationCallback in v8.h).
-typedef v8::Handle<v8::Value> (*SimulatorRuntimeApiCall)(int32_t arg0);
+typedef v8::Handle<v8::Value> (*SimulatorRuntimeDirectApiCall)(int32_t arg0);
 
+// This signature supports direct call to accessor getter callback.
+typedef v8::Handle<v8::Value> (*SimulatorRuntimeDirectGetterCall)(int32_t arg0,
+                                                                  int32_t arg1);
+
 // Software interrupt instructions are used by the simulator to call into the
 // C-based V8 runtime.
 void Simulator::SoftwareInterrupt(Instruction* instr) {
@@ -1572,14 +1586,12 @@
         CHECK(stack_aligned);
         double result = target(arg0, arg1, arg2, arg3);
         SetFpResult(result);
-      } else if (redirection->type() == ExternalReference::DIRECT_CALL) {
-        SimulatorRuntimeApiCall target =
-            reinterpret_cast<SimulatorRuntimeApiCall>(external);
+      } else if (redirection->type() == ExternalReference::DIRECT_API_CALL) {
+        SimulatorRuntimeDirectApiCall target =
+            reinterpret_cast<SimulatorRuntimeDirectApiCall>(external);
         if (::v8::internal::FLAG_trace_sim || !stack_aligned) {
-          PrintF(
-              "Call to host function at %p args %08x",
-              FUNCTION_ADDR(target),
-              arg0);
+          PrintF("Call to host function at %p args %08x",
+              FUNCTION_ADDR(target), arg0);
           if (!stack_aligned) {
             PrintF(" with unaligned stack %08x\n", get_register(sp));
           }
@@ -1591,6 +1603,23 @@
           PrintF("Returned %p\n", reinterpret_cast<void *>(*result));
         }
         set_register(r0, (int32_t) *result);
+      } else if (redirection->type() == ExternalReference::DIRECT_GETTER_CALL) {
+        SimulatorRuntimeDirectGetterCall target =
+            reinterpret_cast<SimulatorRuntimeDirectGetterCall>(external);
+        if (::v8::internal::FLAG_trace_sim || !stack_aligned) {
+          PrintF("Call to host function at %p args %08x %08x",
+              FUNCTION_ADDR(target), arg0, arg1);
+          if (!stack_aligned) {
+            PrintF(" with unaligned stack %08x\n", get_register(sp));
+          }
+          PrintF("\n");
+        }
+        CHECK(stack_aligned);
+        v8::Handle<v8::Value> result = target(arg0, arg1);
+        if (::v8::internal::FLAG_trace_sim) {
+          PrintF("Returned %p\n", reinterpret_cast<void *>(*result));
+        }
+        set_register(r0, (int32_t) *result);
       } else {
         // builtin call.
         ASSERT(redirection->type() == ExternalReference::BUILTIN_CALL);
@@ -2438,6 +2467,8 @@
 // vmov :Rt = Sn
 // vcvt: Dd = Sm
 // vcvt: Sd = Dm
+// Dd = vabs(Dm)
+// Dd = vneg(Dm)
 // Dd = vadd(Dn, Dm)
 // Dd = vsub(Dn, Dm)
 // Dd = vmul(Dn, Dm)
@@ -2473,6 +2504,11 @@
         double dm_value = get_double_from_d_register(vm);
         double dd_value = fabs(dm_value);
         set_d_register_from_double(vd, dd_value);
+      } else if ((instr->Opc2Value() == 0x1) && (instr->Opc3Value() == 0x1)) {
+        // vneg
+        double dm_value = get_double_from_d_register(vm);
+        double dd_value = -dm_value;
+        set_d_register_from_double(vd, dd_value);
       } else if ((instr->Opc2Value() == 0x7) && (instr->Opc3Value() == 0x3)) {
         DecodeVCVTBetweenDoubleAndSingle(instr);
       } else if ((instr->Opc2Value() == 0x8) && (instr->Opc3Value() & 0x1)) {
@@ -2535,6 +2571,7 @@
       double dn_value = get_double_from_d_register(vn);
       double dm_value = get_double_from_d_register(vm);
       double dd_value = dn_value / dm_value;
+      div_zero_vfp_flag_ = (dm_value == 0);
       set_d_register_from_double(vd, dd_value);
     } else {
       UNIMPLEMENTED();  // Not used by V8.
@@ -2769,14 +2806,17 @@
 
     inv_op_vfp_flag_ = get_inv_op_vfp_flag(mode, val, unsigned_integer);
 
+    double abs_diff =
+      unsigned_integer ? fabs(val - static_cast<uint32_t>(temp))
+                       : fabs(val - temp);
+
+    inexact_vfp_flag_ = (abs_diff != 0);
+
     if (inv_op_vfp_flag_) {
       temp = VFPConversionSaturate(val, unsigned_integer);
     } else {
       switch (mode) {
         case RN: {
-          double abs_diff =
-            unsigned_integer ? fabs(val - static_cast<uint32_t>(temp))
-                             : fabs(val - temp);
           int val_sign = (val > 0) ? 1 : -1;
           if (abs_diff > 0.5) {
             temp += val_sign;