update

demo.py

@@ -16,7 +16,7 @@ tasks.register_task('refcoco', RefcocoTask)
 # turn on cuda if GPU is available
 use_cuda = torch.cuda.is_available()
 # use fp16 only when GPU is available
-use_fp16 = True
+use_fp16 = use_cuda
 
 # Load pretrained ckpt & config
 overrides={"bpe_dir":"utils/BPE"}