[NNVM] Fix check in layout parsing (#1502)

* [NNVM] Fix check in layout parsing

* add one workload

nnvm/include/nnvm/layout.h

@@ -298,7 +298,7 @@ class Layout {
     std::ostringstream repr;
     if (is_subdim(layout_simplified_[i])) {
       auto factor = subsizeof(layout_simplified_[i]);
-      CHECK_LT(factor, 0);
+      CHECK_GT(factor, 0);
       repr << factor;
     }
     repr << layout_simplified_[i];

vta/python/vta/top/arm_conv2d.py

@@ -11,6 +11,7 @@ from topi.rasp import conv2d as _rasp_conv2d
 from topi import generic
 
 _WORKLOADS = [
+    Workload('float32', 'float32', 224, 224, 3, 64, 7, 7, 3, 3, 2, 2),
     Workload('int8', 'int32', 224, 224, 3, 64, 7, 7, 3, 3, 2, 2),
     Workload('int8', 'int32', 56, 56, 64, 64, 3, 3, 1, 1, 1, 1),
     Workload('int8', 'int32', 56, 56, 64, 64, 1, 1, 0, 0, 1, 1),
@@ -27,6 +28,7 @@ _WORKLOADS = [
 _SCHEDULES = [
     # float32 imagenet
     SpatialPack(1, 8, 4, 1, 4, True),
+    SpatialPack(1, 8, 4, 1, 4, True),
     SpatialPack(1, 7, 4, 2, 4, True),
     SpatialPack(1, 4, 8, 4, 1, True),
     SpatialPack(1, 4, 4, 1, 16, False),