cpu nms bug fixed

neo-ai · May 30, 2021 · d43e801 · d43e801
1 parent 025010e
commit d43e801
Showing 1 changed file with 16 additions and 9 deletions.
diff --git a/python/tvm/topi/vision/nms.py b/python/tvm/topi/vision/nms.py
@@ -24,7 +24,7 @@
 
 from ..sort import sort, argsort, topk
 from ..math import cast
-from ..transform import reshape
+from ..transform import reshape, arange, expand_dims
 from .. import reduction
 from ..scan import cumsum
 from .nms_util import (
@@ -756,16 +756,23 @@ def _collect_selected_indices_and_scores_ir(
         class_id = i % num_class
 
         with ib.for_range(0, num_boxes, name="j") as j:
-            offset = row_offsets[batch_id, class_id] + j
+            offset = j + class_id * num_boxes
+            collected_indices[batch_id, offset, 0] = zero
+            collected_indices[batch_id, offset, 1] = zero
+            collected_scores[batch_id, offset] = -1.0
+
+    with ib.for_range(0, batch_size * num_class, name="i", kind="parallel") as i:
+        i = cast(i, "int64")
+        batch_id = i // num_class
+        class_id = i % num_class
+
+        with ib.for_range(0, num_boxes, name="j") as j:
+            offset = row_offsets[batch_id, class_id]
 
             with ib.if_scope(j < num_detections[batch_id, class_id]):
-                collected_indices[batch_id, offset, 0] = class_id
-                collected_indices[batch_id, offset, 1] = cast(selected_indices[i, j], "int64")
-                collected_scores[batch_id, offset] = selected_scores[i, j]
-            with ib.else_scope():
-                collected_indices[batch_id, offset, 0] = zero
-                collected_indices[batch_id, offset, 1] = zero
-                collected_scores[batch_id, offset] = -1.0
+                collected_indices[batch_id, offset + j, 0] = class_id
+                collected_indices[batch_id, offset + j, 1] = cast(selected_indices[i, j], "int64")
+                collected_scores[batch_id, offset + j] = selected_scores[i, j]
 
     return ib.get()