From 49cbae055859e1af93fa770af1bea2d0a8615c7b Mon Sep 17 00:00:00 2001
From: Sebastian Hantsch <sebastian.hantsch@rokoco.com>
Date: Wed, 10 Feb 2021 16:26:37 +0100
Subject: [PATCH] Fix sign function in eager mode

---
 src/TensorFlowNET.Core/Operations/gen_math_ops.cs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/TensorFlowNET.Core/Operations/gen_math_ops.cs b/src/TensorFlowNET.Core/Operations/gen_math_ops.cs
index 5d585e77..051f4f6b 100644
--- a/src/TensorFlowNET.Core/Operations/gen_math_ops.cs
+++ b/src/TensorFlowNET.Core/Operations/gen_math_ops.cs
@@ -374,6 +374,16 @@ namespace Tensorflow
 
         public static Tensor sign<T>(T x, string name = "Sign")
         {
+            if (tf.executing_eagerly())
+            {
+                var results = tf.Runner.TFE_FastPathExecute(tf.Context, tf.Context.DeviceName,
+                    "Sign", name,
+                    null,
+                    x);
+
+                return results[0];
+            }
+
             var op = tf.OpDefLib._apply_op_helper("Sign", name: name, args: new { x });
 
             return op.outputs[0];