1 files changed, 7 insertions, 5 deletions
diff --git a/src/arm/simulator-arm.cc b/src/arm/simulator-arm.cc
index 143b8393..00650576 100644
--- a/src/arm/simulator-arm.cc
+++ b/src/arm/simulator-arm.cc
@@ -2600,11 +2600,6 @@ void Simulator::DecodeVCMP(Instr* instr) {
     precision = kDoublePrecision;
   }
 
-  if (instr->Bit(7) != 0) {
-    // Raising exceptions for quiet NaNs are not supported.
-    UNIMPLEMENTED();  // Not used by V8.
-  }
-
   int d = instr->VFPDRegCode(precision);
   int m = 0;
   if (instr->Opc2Field() == 0x4) {
@@ -2618,6 +2613,13 @@ void Simulator::DecodeVCMP(Instr* instr) {
       dm_value = get_double_from_d_register(m);
     }
 
+    // Raise exceptions for quiet NaNs if necessary.
+    if (instr->Bit(7) == 1) {
+      if (isnan(dd_value)) {
+        inv_op_vfp_flag_ = true;
+      }
+    }
+
     Compute_FPSCR_Flags(dd_value, dm_value);
   } else {
     UNIMPLEMENTED();  // Not used by V8.