reorganize files to prepare for MIOpen integration (#51)

* change olc cmake

* adding online compile to fwd-v4r5r2

* update scripts

* remane fwd-v4r5r2 to fwd-v6r1

* clean up

host/host_tensor/src/device.cpp

@@ -0,0 +1,67 @@
+#include "device.hpp"
+
+DeviceMem::DeviceMem(std::size_t mem_size) : mMemSize(mem_size)
+{
+    hipGetErrorString(hipMalloc(static_cast<void**>(&mpDeviceBuf), mMemSize));
+}
+
+void* DeviceMem::GetDeviceBuffer() { return mpDeviceBuf; }
+
+void DeviceMem::ToDevice(const void* p)
+{
+    hipGetErrorString(
+        hipMemcpy(mpDeviceBuf, const_cast<void*>(p), mMemSize, hipMemcpyHostToDevice));
+}
+
+void DeviceMem::FromDevice(void* p)
+{
+    hipGetErrorString(hipMemcpy(p, mpDeviceBuf, mMemSize, hipMemcpyDeviceToHost));
+}
+
+DeviceMem::~DeviceMem() { hipGetErrorString(hipFree(mpDeviceBuf)); }
+
+struct KernelTimerImpl
+{
+    KernelTimerImpl()
+    {
+        hipEventCreate(&mStart);
+        hipEventCreate(&mEnd);
+    }
+
+    ~KernelTimerImpl()
+    {
+        hipEventDestroy(mStart);
+        hipEventDestroy(mEnd);
+    }
+
+    void Start()
+    {
+        hipDeviceSynchronize();
+        hipEventRecord(mStart, 0);
+    }
+
+    void End()
+    {
+        hipEventRecord(mEnd, 0);
+        hipEventSynchronize(mEnd);
+    }
+
+    float GetElapsedTime() const
+    {
+        float time;
+        hipEventElapsedTime(&time, mStart, mEnd);
+        return time;
+    }
+
+    hipEvent_t mStart, mEnd;
+};
+
+KernelTimer::KernelTimer() : impl(new KernelTimerImpl()) {}
+
+KernelTimer::~KernelTimer() {}
+
+void KernelTimer::Start() { impl->Start(); }
+
+void KernelTimer::End() { impl->End(); }
+
+float KernelTimer::GetElapsedTime() const { return impl->GetElapsedTime(); }