tests: add gem_tiled_swapping

Also add a drmtest_exchange_int helper, might come handy at other
places.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

2 files changed, 11 insertions, 0 deletions

diff --git a/lib/drmtest.c b/lib/drmtest.c
index cc946411..b2ac7621 100644
--- a/lib/drmtest.c
+++ b/lib/drmtest.c
@@ -333,6 +333,16 @@ void drmtest_stop_signal_helper(void)
 }
 
 /* other helpers */
+void drmtest_exchange_int(void *array, unsigned i, unsigned j)
+{
+	int *int_arr, tmp;
+	int_arr = array;
+
+	tmp = int_arr[i];
+	int_arr[i] = int_arr[j];
+	int_arr[j] = tmp;
+}
+
 void drmtest_permute_array(void *array, unsigned size,
 			   void (*exchange_func)(void *array,
 						 unsigned i,
diff --git a/lib/drmtest.h b/lib/drmtest.h
index 23d6f089..90d81e7f 100644
--- a/lib/drmtest.h
+++ b/lib/drmtest.h
@@ -55,6 +55,7 @@ uint64_t gem_mappable_aperture_size(void);
 /* generally useful helpers */
 void drmtest_fork_signal_helper(void);
 void drmtest_stop_signal_helper(void);
+void drmtest_exchange_int(void *array, unsigned i, unsigned j);
 void drmtest_permute_array(void *array, unsigned size,
 			   void (*exchange_func)(void *array,
 						 unsigned i,