[TFLite][Frontend] Fix test failures caused by div-by-zero (#15844)

* [TFLite][Frontend] Support quantized floor_mod

* [TVM][Frontend] Fix zero-point issues in quantized div/floor_div

* [TVM][Frontend] Fix zero-point issues in quantized div/floor_div

tests/python/frontend/tflite/test_forward.py

@@ -2452,6 +2452,7 @@ def _test_elemwise(
     qnn_op=None,
     same_qnn_params=False,
     comparison_op=False,
+    exclude_zero_point=False,
 ):
     """One iteration of elemwise"""
 
@@ -2480,6 +2481,16 @@ def __test_elemwise(in_data):
                 inq0_min, inq0_max = (out_min, out_max)
                 inq1_min, inq1_max = (out_min, out_max)
 
+            if exclude_zero_point:
+                if inq1_max == inq1_min:
+                    raise ZeroDivisionError("Input range is 0.")
+
+                # only compute for rhs.
+                quant_scale = 255 / (inq1_max - inq1_min)
+                zero_point = int(round(-inq1_min * quant_scale))
+                data[1][data[1] == zero_point] += 1
+                data[1][data[1] == 0] += 1
+
             # fake_quant will keep the tensors in float32 until the conversion in the session
             inq_data = [
                 tf.quantization.fake_quant_with_min_max_args(
@@ -2619,6 +2630,7 @@ def _test_div(data, fused_activation_function=None, quantized=False, qnn_op=None
         quantized,
         qnn_op,
         same_qnn_params=True,
+        exclude_zero_point=True,
     )
 
 
@@ -2802,6 +2814,7 @@ def _test_floor_divide(data, fused_activation_function=None, quantized=False, qn
         quantized,
         qnn_op,
         same_qnn_params=True,
+        exclude_zero_point=True,
     )
 
 
@@ -2882,7 +2895,7 @@ def _test_elemwise_qnn_out_range(qnn_op):
 
 
 def test_all_elemwise():
-    """All_elewise"""
+    """All_elemwise"""
     _test_forward_elemwise(_test_add)
     _test_forward_elemwise_quantized(_test_add)
     _test_forward_elemwise(partial(_test_add, fused_activation_function="RELU"))