Rename hheader files to .cuh

include/utils/cuda_helper.cuh

@@ -0,0 +1,32 @@
+#ifndef CUDA_HELPER_H
+#define CUDA_HELPER_H
+
+#include <cuda_runtime.h>
+#include <cublas_v2.h>
+
+#define IDX2C(i,j,ld) (((j)*(ld))+(i))
+
+// CUDA error checking macro
+#define CUDA_CHECK(call) \
+do { \
+    cudaError_t result = call; \
+    if (result != cudaSuccess) { \
+        fprintf(stderr, "CUDA error at %s:%d code=%d(%s) \"%s\" \n", \
+                __FILE__, __LINE__, static_cast<unsigned int>(result), \
+                cudaGetErrorString(result), #call); \
+        exit(EXIT_FAILURE); \
+    } \
+} while (0)
+
+// cuBLAS error checking macro
+#define CUBLAS_CHECK(call) \
+do { \
+    cublasStatus_t result = call; \
+    if (result != CUBLAS_STATUS_SUCCESS) { \
+        fprintf(stderr, "cuBLAS error at %s:%d code=%d\n", \
+                __FILE__, __LINE__, static_cast<unsigned int>(result)); \
+        exit(EXIT_FAILURE); \
+    } \
+} while (0)
+
+#endif // CUDA_HELPER_H