Add test cuda_utils

test/cuda_utils.cu

@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#ifdef __CUDACC__
+#   warning compiling for CUDA
+#   include "../src/mnist/cuda_utils.cu"
+#   define MAX_CUDA_THREADS 1024 // from NVIDIA documentation
+#else
+#   warning skipping CUDA checks
+#endif
+
+#ifdef __CUDACC__
+#define gpuErrchk(ans) { gpuAssert((ans), __FILE__, __LINE__); }
+inline void gpuAssert(cudaError_t code, const char *file, int line, bool abort=true)
+{
+   if (code != cudaSuccess) 
+   {
+      fprintf(stderr,"GPUassert: %s %s %d\n", cudaGetErrorString(code), file, line);
+      if (abort) exit(code);
+   }
+}
+
+__global__ void check_labels(int n, unsigned int* labels) {
+    for (int i=0; i < n; i++) {
+        (void)labels[i];
+    }
+}
+
+
+int main() {
+    printf("Test de la compatibilité CUDA\n");
+    check_cuda_compatibility();
+    printf("OK\n");
+
+    printf("Lecture des labels\n");
+    unsigned int* labels = cudaReadMnistLabels("data/mnist/t10k-labels-idx1-ubyte");
+    printf("OK\n");
+
+    printf("Test des labels\n");
+    //! TODO: fix
+    // Ne provoque pas d'erreurs, mais tous les labels valent 1
+    check_labels<<<1, 1>>>(10000, labels);
+    gpuErrchk( cudaPeekAtLastError() );
+    gpuErrchk( cudaDeviceSynchronize() );
+    printf("OK\n");
+    
+    return 0;
+}
+#else
+int main() {
+    printf("Pas de test CUDA à passer\n");
+    return 0;
+}
+#endif