P4 to Git Change 1600056 by skudchad@skudchad_test2_win_opencl on 2018/08/30 12:04:10

SWDEV-145570 - [HIP] Fix elapsed time calc for hipEvent

	ReviewBoardURL = http://ocltc.amd.com/reviews/r/15717/diff/

Affected files ...

... //depot/stg/opencl/drivers/opencl/api/hip/hip_event.cpp#6 edit

hipamd/api/hip/hip_event.cpp

@@ -119,7 +119,8 @@ hipError_t hipEventElapsedTime(float *ms, hipEvent_t start, hipEvent_t stop) {
     HIP_RETURN(hipErrorInvalidValue);
   }
 
-  *ms = static_cast<float>(eStop->event_->profilingInfo().submitted_ - eStart->event_->profilingInfo().submitted_)/1000000.f;
+  *ms = static_cast<float>(static_cast<int64_t>(eStop->event_->profilingInfo().submitted_ -
+                           eStart->event_->profilingInfo().submitted_))/1000000.f;
 
   HIP_RETURN(hipSuccess);
 }