Added support for complex device functions

- Added complex number arithmetic operation for float and double datatypes
- TODO: make them host functions and support half
- Added new function which is not in CUDA, hipCsqabs which is square of absolute value

Change-Id: Ib96e194ad45dc64fcba29eb19ad0376542e0591d

tests/src/hipComplex.cpp

@@ -0,0 +1,33 @@
+#include<iostream>
+#include<hip/hip_runtime.h>
+#include<hip/hip_runtime_api.h>
+#include<hip/hcc_detail/hipComplex.h>
+
+#define LEN 64
+#define SIZE 64<<2
+
+__global__  void getSqAbs(hipLaunchParm lp, float *A, float *B, float *C){
+    int tx = hipThreadIdx_x + hipBlockIdx_x * hipBlockDim_x;
+    C[tx] = hipCsqabsf(make_hipFloatComplex(A[tx], B[tx]));
+}
+
+int main(){
+    float *A, *Ad, *B, *Bd, *C, *Cd;
+    A = new float[LEN];
+    B = new float[LEN];
+    C = new float[LEN];
+    for(uint32_t i=0;i<LEN;i++){
+        A[i] = i*1.0f;
+        B[i] = i*1.0f;
+        C[i] = i*1.0f;
+    }
+
+    hipMalloc((void**)&Ad, SIZE);
+    hipMalloc((void**)&Bd, SIZE);
+    hipMalloc((void**)&Cd, SIZE);
+    hipMemcpy(Ad, A, SIZE, hipMemcpyHostToDevice);
+    hipMemcpy(Bd, B, SIZE, hipMemcpyHostToDevice);
+    hipLaunchKernel(getSqAbs, dim3(1), dim3(LEN), 0, 0, Ad, Bd, Cd);
+    hipMemcpy(C, Cd, SIZE, hipMemcpyDeviceToHost);
+    std::cout<<A[11]<<" "<<B[11]<<" "<<C[11]<<std::endl;
+}