From 5e96be7707a571b136dc64256af399dbbb0fdfe0 Mon Sep 17 00:00:00 2001
From: Vidhya Sudhan Loganathan <vidhyasudhan.loganathan@arm.com>
Date: Tue, 18 Dec 2018 14:17:00 +0000
Subject: COMPMID-1722 : CL: Implement Range

Change-Id: I88da6eb5289c303b1dc91606c1560ce629746058
Reviewed-on: https://review.mlplatform.org/381
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
---
 utils/Utils.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

(limited to 'utils')

diff --git a/utils/Utils.h b/utils/Utils.h
index 8cac857178..031a3726a1 100644
--- a/utils/Utils.h
+++ b/utils/Utils.h
@@ -194,6 +194,55 @@ inline std::string get_typestring(DataType data_type)
     }
 }
 
+/** Returns true if the value can be represented by the given data type
+ *
+ * @param[in] val        value to be checked
+ * @param[in] dt         data type that is checked
+ * @param[in] quant_info quantization info if the data type is QASYMM8
+ *
+ * @return true if the data type can hold the value.
+ */
+template <typename T>
+bool check_value_range(T val, DataType dt, QuantizationInfo quant_info = QuantizationInfo())
+{
+    switch(dt)
+    {
+        case DataType::U8:
+            return ((static_cast<uint8_t>(val) == val) && val >= std::numeric_limits<uint8_t>::lowest() && val <= std::numeric_limits<uint8_t>::max());
+        case DataType::QASYMM8:
+        {
+            double min = static_cast<double>(quant_info.dequantize(0));
+            double max = static_cast<double>(quant_info.dequantize(std::numeric_limits<uint8_t>::max()));
+            return ((double)val >= min && (double)val <= max);
+        }
+        case DataType::S8:
+            return ((static_cast<int8_t>(val) == val) && val >= std::numeric_limits<int8_t>::lowest() && val <= std::numeric_limits<int8_t>::max());
+        case DataType::U16:
+            return ((static_cast<uint16_t>(val) == val) && val >= std::numeric_limits<uint16_t>::lowest() && val <= std::numeric_limits<uint16_t>::max());
+        case DataType::S16:
+            return ((static_cast<int16_t>(val) == val) && val >= std::numeric_limits<int16_t>::lowest() && val <= std::numeric_limits<int16_t>::max());
+        case DataType::U32:
+            return ((static_cast<uint32_t>(val) == val) && val >= std::numeric_limits<uint32_t>::lowest() && val <= std::numeric_limits<uint32_t>::max());
+        case DataType::S32:
+            return ((static_cast<int32_t>(val) == val) && val >= std::numeric_limits<int32_t>::lowest() && val <= std::numeric_limits<int32_t>::max());
+        case DataType::U64:
+            return (val >= std::numeric_limits<uint64_t>::lowest() && val <= std::numeric_limits<uint64_t>::max());
+        case DataType::S64:
+            return (val >= std::numeric_limits<int64_t>::lowest() && val <= std::numeric_limits<int64_t>::max());
+        case DataType::F16:
+            return (val >= std::numeric_limits<half>::lowest() && val <= std::numeric_limits<half>::max());
+        case DataType::F32:
+            return (val >= std::numeric_limits<float>::lowest() && val <= std::numeric_limits<float>::max());
+        case DataType::F64:
+            return (val >= std::numeric_limits<double>::lowest() && val <= std::numeric_limits<double>::max());
+        case DataType::SIZET:
+            return ((static_cast<size_t>(val) == val) && val >= std::numeric_limits<size_t>::lowest() && val <= std::numeric_limits<size_t>::max());
+        default:
+            ARM_COMPUTE_ERROR("Data type not supported");
+            return false;
+    }
+}
+
 /** Maps a tensor if needed
  *
  * @param[in] tensor   Tensor to be mapped
-- 
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