!8892 Add Conv2dBnFoldQuantOneConv function（gpu and ascend）

From: @xiaoyisd
Reviewed-by: @sanjaychan,@jjfeing
Signed-off-by: @sanjaychan

mindspore/nn/layer/quant.py

@@ -419,12 +419,17 @@ class Conv2dBnFoldQuantOneConv(Cell):
         self.fake = fake
         self.quant_config = quant_config
         self.quant_dtype = quant_dtype
+        data_format = 'NCHW'
+        self.format = Validator.check_string(data_format, ['NCHW', 'NHWC'], 'format', self.cls_name)
         self.is_gpu = context.get_context('device_target') == "GPU"
         self.is_Ascend = context.get_context('device_target') == "Ascend"
+        self.is_graph_mode = context.get_context("mode") == context.GRAPH_MODE
         if context.get_context("enable_ge"):
             self.is_ge_backend = True
         else:
             self.is_ge_backend = False
+        self.enable_default_train = self.is_graph_mode and \
+                                    (self.is_ge_backend or self.is_ascend)
 
         # initialize convolution op and Parameter
         if context.get_context('device_target') == "Ascend" and group > 1:
@@ -448,6 +453,7 @@ class Conv2dBnFoldQuantOneConv(Cell):
                                  group=group)
             weight_shape = [out_channels, in_channels // group, *self.kernel_size]
             channel_axis = 0
+        self.channel_axis = channel_axis
         self.weight = Parameter(initializer(weight_init, weight_shape), name='weight')
         self.bias_add = P.BiasAdd()
         if Validator.check_bool(has_bias):
@@ -490,7 +496,6 @@ class Conv2dBnFoldQuantOneConv(Cell):
         self.mul_var = P.Mul().shard(data_parallel_strategy_one)
         self.assign_sub_mean = P.AssignSub().shard(data_parallel_strategy)
         self.assign_sub_var = P.AssignSub().shard(data_parallel_strategy)
-        self.one = Tensor(1, mstype.int32)
         self.reshape = P.Reshape()
 
     def extend_repr(self):
@@ -507,18 +512,22 @@ class Conv2dBnFoldQuantOneConv(Cell):
     def construct(self, x):
         running_std = P.Sqrt()(P.TensorAdd()(self.moving_variance, self.eps))
         scale_factor = self.gamma / running_std
-        weight = self.weight * scale_factor
         if self.channel_axis:
             scale_factor = self.reshape(scale_factor, (1, -1, 1, 1))
         else:
             scale_factor = self.reshape(scale_factor, (-1, 1, 1, 1))
+        weight = self.weight * scale_factor
         if self.fake:
             weight = self.fake_quant_weight(weight)
         conv = self.conv(x, weight)
         scale_factor = self.reshape(scale_factor, (1, -1, 1, 1))
-        conv_orig = conv / scale_factor
+        if self.enable_default_train:
+            scale_factor = P.Reciprocal()(scale_factor)
+            conv_orig = conv * scale_factor
+        else:
+            conv_orig = conv / scale_factor
         if self.training:
-            if not self.is_gpu:
+            if self.enable_default_train:
                 out, batch_mean, batch_var, _, _ = self.bn_train(conv_orig,
                                                                  self.gamma,
                                                                  self.beta,
@@ -531,20 +540,19 @@ class Conv2dBnFoldQuantOneConv(Cell):
                 temp_variance = self.mul_var(mean_sub2, self.momentum)
                 out = F.depend(out, self.assign_sub_mean(self.moving_mean, temp_mean))
                 out = F.depend(out, self.assign_sub_var(self.moving_variance, temp_variance))
-            else:
-                out = self.bn_train(conv_orig,
-                                    self.gamma,
-                                    self.beta,
-                                    self.moving_mean,
-                                    self.moving_variance)[0]
-        else:
-            out = self.bn_infer(conv_orig,
-                                self.gamma,
-                                self.beta,
-                                self.moving_mean,
-                                self.moving_variance)[0]
-
-        return out
+                return out
+
+            return self.bn_train(conv_orig,
+                                 self.gamma,
+                                 self.beta,
+                                 self.moving_mean,
+                                 self.moving_variance)[0]
+
+        return self.bn_infer(conv_orig,
+                             self.gamma,
+                             self.beta,
+                             self.moving_mean,
+                             self.moving_variance)[0]
 
 
 class Conv2dBnFoldQuant(Cell):