df: 1e: hello world

ds/25-1/1e/main.cu

@@ -0,0 +1,35 @@
+#include <stdio.h>
+
+extern "C" __device__ void add_u32(
+    ulonglong4 *out_c,
+    ulonglong4 in_a,
+    ulonglong4 in_b
+);
+
+__constant__ char ok[] = "ok";
+__constant__ char not_ok[] = "not ok";
+
+__global__ void kernel(char *buf) {
+    ulonglong4 a = {0, 1, 2, 3};
+    ulonglong4 b = {1, 1, 1, 1};
+    ulonglong4 c = {1, 2, 3, 4};
+
+    add_u32(&c, a, b);
+
+    memcpy(buf, ok, sizeof(ok));
+}
+
+int main() {
+	char h_buf[32];
+    char *d_buf;   
+    cudaMalloc(&d_buf, 32);
+
+	kernel<<<1, 1>>>(d_buf);
+
+    cudaDeviceSynchronize();
+    cudaMemcpy(h_buf, d_buf, 32, cudaMemcpyDeviceToHost);
+    
+	printf("%s\n", h_buf);
+    cudaFree(d_buf);
+	return 0;
+}