Initialize and use cuBLAS properly

include/utils/cuda_helper.h

@@ -2,6 +2,7 @@
 #define CUDA_HELPER_H
 
 #include <cuda_runtime.h>
+#include <cublas_v2.h>
 
 #define IDX2C(i,j,ld) (((j)*(ld))+(i))
 
@@ -17,7 +18,15 @@ do { \
     } \
 } while (0)
 
-// Initialize CUDA and return the device properties
-cudaDeviceProp initializeCUDA();
+// 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<int>(result)); \
+        exit(EXIT_FAILURE); \
+    } \
+} while (0)
 
 #endif // CUDA_HELPER_H