fix adam

paddle/fluid/operators/distributed_ops/lookup_sparse_table_fuse_adam_op.h

@@ -115,10 +115,10 @@ class LargeScaleFuseAdamOpKernel<platform::CPUDeviceContext, T>
                           "param_row should have the same size with grad_row"));
 
     T lr_ = lr[0];
-    T beta1_ = beta1_pow->data<T>()[0];
-    T beta2_ = beta2_pow->data<T>()[0];
+    T beta1_pow_ = beta1_pow->data<T>()[0];
+    T beta2_pow_ = beta2_pow->data<T>()[0];
 
-    lr_ *= sqrt(1 - beta1_) / (1 - beta2_);
+    lr_ *= sqrt(1 - beta2_pow_) / (1 - beta1_pow_);
 
     for (size_t i = 0; i < in_rows.size(); i++) {
       auto &params = values[i][0];
@@ -131,8 +131,8 @@ class LargeScaleFuseAdamOpKernel<platform::CPUDeviceContext, T>
 
       for (int x = 0; x < grad_width; ++x) {
         auto g = grad_v.data<T>()[grad_width * i + x];
-        m1_data[x] = beta1_ * m1_data[x] + (1 - beta1_) * g;
-        m2_data[x] = beta2_ * m2_data[x] + (1 - beta2_) * g * g;
+        m1_data[x] = beta1 * m1_data[x] + (1 - beta1) * g;
+        m2_data[x] = beta2 * m2_data[x] + (1 - beta2) * g * g;
         p_data[x] -= lr_ * (m1_data[x] / (sqrt(m2_data[x]) + epsilon));
       }
     }