From b99e54e05a4e9fed3bae1172c874af87e712526b Mon Sep 17 00:00:00 2001
From: SiCongLi <sicong.li@arm.com>
Date: Wed, 5 Jan 2022 12:18:03 +0000
Subject: Add signbit support for f16 type

Resolves COMPMID-5037

Change-Id: I648e8810dfd86e2ebcc16554f3f4cc58a5fd8c32
Signed-off-by: SiCongLi <sicong.li@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/6899
Reviewed-by: Giorgio Arena <giorgio.arena@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
---
 support/ToolchainSupport.h | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'support')

diff --git a/support/ToolchainSupport.h b/support/ToolchainSupport.h
index f19a8da627..cddcd542c8 100644
--- a/support/ToolchainSupport.h
+++ b/support/ToolchainSupport.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2021 Arm Limited.
+ * Copyright (c) 2017-2022 Arm Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -309,6 +309,23 @@ inline bool isfinite(bfloat16 value)
 {
     return std::isfinite(float(value));
 }
+
+// std::signbit
+template <typename T, typename = typename std::enable_if<std::is_arithmetic<T>::value>::type>
+inline bool signbit(T value)
+{
+    return std::signbit(value);
+}
+
+inline bool signbit(half_float::half value)
+{
+    return half_float::signbit(value);
+}
+
+inline bool signbit(bfloat16 value)
+{
+    return std::signbit(float(value));
+}
 } // namespace cpp11
 } // namespace support
 } // namespace arm_compute
-- 
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