adding regression sort test

tests/regression/sort/kernel.c

@@ -0,0 +1,41 @@
+#include <stdint.h>
+#include <vx_intrinsics.h>
+#include <vx_spawn.h>
+#include "common.h"
+
+// Parallel Selection sort
+
+int __attribute__((noinline)) __smaller(int index, int tid, int32_t cur_value, int32_t ref_value) {
+	int ret = 0;
+	__if (cur_value < ref_value) {
+		ret = 1;
+	} __else {
+		__if (cur_value == ref_value) {
+			__if (index < tid) {
+				ret = 1;
+			} __endif
+		} __endif
+	} __endif
+	return ret;
+}
+
+void kernel_body(int task_id, void* arg) {
+	struct kernel_arg_t* _arg = (struct kernel_arg_t*)(arg);
+	uint32_t num_points = _arg->num_points;
+	int32_t* src_ptr = (int32_t*)_arg->src_ptr;
+	int32_t* dst_ptr = (int32_t*)_arg->dst_ptr;
+
+	int32_t ref_value = src_ptr[task_id];
+
+	uint32_t pos = 0;
+	for (uint32_t i = 0; i < num_points; ++i) {
+		int32_t cur_value = src_ptr[i];		
+		pos += __smaller(i, task_id, cur_value, ref_value);
+	}
+	dst_ptr[pos] = ref_value;
+}
+
+void main() {
+	struct kernel_arg_t* arg = (struct kernel_arg_t*)KERNEL_ARG_DEV_MEM_ADDR;
+	vx_spawn_tasks(arg->num_points, kernel_body, arg);
+}