--- old/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	2015-07-22 17:48:04.602625200 -0700
+++ new/src/cpu/x86/vm/c1_LIRGenerator_x86.cpp	2015-07-22 17:48:03.773625200 -0700
@@ -808,6 +808,12 @@
 
 void LIRGenerator::do_MathIntrinsic(Intrinsic* x) {
   assert(x->number_of_arguments() == 1 || (x->number_of_arguments() == 2 && x->id() == vmIntrinsics::_dpow), "wrong type");
+
+  if (x->id() == vmIntrinsics::_dexp) {
+    do_ExpIntrinsic(x);
+    return;
+  }
+
   LIRItem value(x->argument_at(0), this);
 
   bool use_fpu = false;
@@ -818,7 +824,6 @@
       case vmIntrinsics::_dtan:
       case vmIntrinsics::_dlog:
       case vmIntrinsics::_dlog10:
-      case vmIntrinsics::_dexp:
       case vmIntrinsics::_dpow:
         use_fpu = true;
     }
@@ -870,7 +875,6 @@
     case vmIntrinsics::_dtan:   __ tan  (calc_input, calc_result, tmp1, tmp2);              break;
     case vmIntrinsics::_dlog:   __ log  (calc_input, calc_result, tmp1);                    break;
     case vmIntrinsics::_dlog10: __ log10(calc_input, calc_result, tmp1);                    break;
-    case vmIntrinsics::_dexp:   __ exp  (calc_input, calc_result,              tmp1, tmp2, FrameMap::rax_opr, FrameMap::rcx_opr, FrameMap::rdx_opr); break;
     case vmIntrinsics::_dpow:   __ pow  (calc_input, calc_input2, calc_result, tmp1, tmp2, FrameMap::rax_opr, FrameMap::rcx_opr, FrameMap::rdx_opr); break;
     default:                    ShouldNotReachHere();
   }
@@ -880,6 +884,32 @@
   }
 }
 
+void LIRGenerator::do_ExpIntrinsic(Intrinsic* x) {
+  LIRItem value(x->argument_at(0), this);
+  value.set_destroys_register();
+
+  LIR_Opr calc_result = rlock_result(x);
+  LIR_Opr result_reg = result_register_for(x->type());  
+
+  BasicTypeList signature(1);
+  signature.append(T_DOUBLE);
+  CallingConvention* cc = frame_map()->c_calling_convention(&signature);
+
+  value.load_item_force(cc->at(0));
+
+#ifndef _LP64  
+  LIR_Opr tmp = FrameMap::fpu0_double_opr;
+  result_reg = tmp;
+  if (VM_Version::supports_sse2()) {
+    __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
+  } else {
+    __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::dexp), getThreadTemp(), result_reg, cc->args());
+  }
+#else
+  __ call_runtime_leaf(StubRoutines::dexp(), getThreadTemp(), result_reg, cc->args());
+#endif
+  __ move(result_reg, calc_result);
+}
 
 void LIRGenerator::do_ArrayCopy(Intrinsic* x) {
   assert(x->number_of_arguments() == 5, "wrong type");