From 53d092d34c1e9924151d8d3a228c04620c1baf5c Mon Sep 17 00:00:00 2001
From: Derek Lamberti <derek.lamberti@arm.com>
Date: Wed, 19 Feb 2020 13:40:56 +0000
Subject: IVGCVSW-4486 Introduce numeric_cast implementation

Change-Id: I3e64bca4a1709ac199513676579cf3c9a3090f26
Signed-off-by: Derek Lamberti <derek.lamberti@arm.com>
---
 src/armnn/test/UtilityTests.cpp | 47 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'src/armnn/test')

diff --git a/src/armnn/test/UtilityTests.cpp b/src/armnn/test/UtilityTests.cpp
index 5309d82ce4..7be5c9518a 100644
--- a/src/armnn/test/UtilityTests.cpp
+++ b/src/armnn/test/UtilityTests.cpp
@@ -8,9 +8,11 @@
 #include <boost/polymorphic_cast.hpp>
 
 #define ARMNN_POLYMORPHIC_CAST_TESTABLE
+#define ARMNN_NUMERIC_CAST_TESTABLE
 
 #include <armnn/utility/IgnoreUnused.hpp>
 #include <armnn/utility/PolymorphicDowncast.hpp>
+#include <armnn/utility/NumericCast.hpp>
 
 #include <armnn/Exceptions.hpp>
 
@@ -53,4 +55,49 @@ BOOST_AUTO_TEST_CASE(PolymorphicDowncast)
     armnn::IgnoreUnused(ptr1, ptr2);
 }
 
+
+BOOST_AUTO_TEST_CASE(NumericCast)
+{
+    using namespace armnn;
+
+    // To 8 bit
+    BOOST_CHECK_THROW(numeric_cast<unsigned char>(-1), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<unsigned char>(1 << 8), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<unsigned char>(1L << 16), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<unsigned char>(1LL << 32), std::bad_cast);
+
+    BOOST_CHECK_THROW(numeric_cast<signed char>((1L << 8)*-1), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<signed char>((1L << 15)*-1), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<signed char>((1LL << 31)*-1), std::bad_cast);
+
+    BOOST_CHECK_NO_THROW(numeric_cast<unsigned char>(1U));
+    BOOST_CHECK_NO_THROW(numeric_cast<unsigned char>(1L));
+    BOOST_CHECK_NO_THROW(numeric_cast<signed char>(-1));
+    BOOST_CHECK_NO_THROW(numeric_cast<signed char>(-1L));
+    BOOST_CHECK_NO_THROW(numeric_cast<signed char>((1 << 7)*-1));
+
+    // To 16 bit
+    BOOST_CHECK_THROW(numeric_cast<uint16_t>(-1), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<uint16_t>(1L << 16), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<uint16_t>(1LL << 32), std::bad_cast);
+
+    BOOST_CHECK_THROW(numeric_cast<int16_t>(1L << 15), std::bad_cast);
+    BOOST_CHECK_THROW(numeric_cast<int16_t>(1LL << 31), std::bad_cast);
+
+    BOOST_CHECK_NO_THROW(numeric_cast<uint16_t>(1L << 8));
+    BOOST_CHECK_NO_THROW(numeric_cast<int16_t>(1L << 7));
+    BOOST_CHECK_NO_THROW(numeric_cast<int16_t>((1L << 15)*-1));
+
+    // To 32 bit
+    BOOST_CHECK_NO_THROW(numeric_cast<uint32_t>(1));
+    BOOST_CHECK_NO_THROW(numeric_cast<uint32_t>(1 << 8));
+    BOOST_CHECK_NO_THROW(numeric_cast<uint32_t>(1L << 16));
+    BOOST_CHECK_NO_THROW(numeric_cast<uint32_t>(1LL << 31));
+
+    BOOST_CHECK_NO_THROW(numeric_cast<int32_t>(-1));
+    BOOST_CHECK_NO_THROW(numeric_cast<int32_t>((1L << 8)*-1));
+    BOOST_CHECK_NO_THROW(numeric_cast<int32_t>((1L << 16)*-1));
+    BOOST_CHECK_NO_THROW(numeric_cast<int32_t>((1LL << 31)*-1));
+}
+
 BOOST_AUTO_TEST_SUITE_END()
-- 
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