compatible with the AMP.use_amp field in config (#2889)

ppcls/static/program.py

@@ -154,7 +154,8 @@ def create_strategy(config):
     """
     build_strategy = paddle.static.BuildStrategy()
 
-    fuse_op = True if 'AMP' in config else False
+    fuse_op = True if 'AMP' in config and config['AMP'].get('use_amp',
+                                                            True) else False
 
     fuse_bn_act_ops = config.get('fuse_bn_act_ops', fuse_op)
     fuse_elewise_add_act_ops = config.get('fuse_elewise_add_act_ops', fuse_op)
@@ -194,7 +195,7 @@ def dist_optimizer(config, optimizer):
 
 
 def mixed_precision_optimizer(config, optimizer):
-    if 'AMP' in config:
+    if 'AMP' in config and config['AMP'].get('use_amp', True):
         amp_cfg = config.AMP if config.AMP else dict()
         scale_loss = amp_cfg.get('scale_loss', 1.0)
         use_dynamic_loss_scaling = amp_cfg.get('use_dynamic_loss_scaling',
@@ -243,7 +244,8 @@ def build(config,
             use_mix = "batch_transform_ops" in config["DataLoader"][mode][
                 "dataset"]
             data_dtype = "float32"
-            if 'AMP' in config and config["AMP"]["level"] == 'O2':
+            if 'AMP' in config and config['AMP'].get(
+                    'use_amp', True) and config["AMP"]["level"] == 'O2':
                 data_dtype = "float16"
             feeds = create_feeds(
                 config["Global"]["image_shape"],