From c25a32aa272ff3c753ee8be2ea89457367b38734 Mon Sep 17 00:00:00 2001
From: Ewan Higgs <ewan.higgs@ugent.be>
Date: Thu, 21 Jan 2016 00:17:00 +0100
Subject: [PATCH] fix/native: Fix sigmoid_grad to use x_diff instead of x for
 dx

---
 src/frameworks/native/helper.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frameworks/native/helper.rs b/src/frameworks/native/helper.rs
index 399a5d1..0a0678a 100644
--- a/src/frameworks/native/helper.rs
+++ b/src/frameworks/native/helper.rs
@@ -144,7 +144,7 @@ macro_rules! impl_ops_sigmoid_for {
                 result_diff: &mut ::co::tensor::SharedTensor<$t>
             ) -> Result<(), ::co::error::Error> {
                 if let Some(sig_data) = x.get(self.device()).unwrap().as_native() {
-                    if let Some(sig_dx) = x.get(self.device()).unwrap().as_native() {
+                    if let Some(sig_dx) = x_diff.get(self.device()).unwrap().as_native() {
                         let res = sig_data.as_slice::<$t>().iter()
                         .zip(sig_dx.as_slice::<$t>().iter())
                         .map(|(t, dt)| ::frameworks::native::helper::sigmoid_grad(t, dt));