From f63885bc445af1329e6a5c44d94b5c5d78146b2c Mon Sep 17 00:00:00 2001
From: Michalis Spyrou <michalis.spyrou@arm.com>
Date: Wed, 16 Jan 2019 14:18:09 +0000
Subject: COMPMID-1710 Move some Util functions to core/Utils

Building with exceptions=0 was failing

Change-Id: I6f264dc859dedc66d12d522652134508e18d5740
Reviewed-on: https://review.mlplatform.org/526
Reviewed-by: Isabella Gottardi <isabella.gottardi@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
---
 arm_compute/core/Utils.h | 65 +++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 64 insertions(+), 1 deletion(-)

(limited to 'arm_compute/core/Utils.h')

diff --git a/arm_compute/core/Utils.h b/arm_compute/core/Utils.h
index 696845d3ff..44974f1ecc 100644
--- a/arm_compute/core/Utils.h
+++ b/arm_compute/core/Utils.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, 2017, 2018 ARM Limited.
+ * Copyright (c) 2016-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -1041,6 +1041,69 @@ inline std::string float_to_string_with_full_precision(float val)
     return ss.str();
 }
 
+/** Returns the number of elements required to go from start to end with the wanted step
+ *
+ * @param[in] start start value
+ * @param[in] end   end value
+ * @param[in] step  step value between each number in the wanted sequence
+ *
+ * @return number of elements to go from start value to end value using the wanted step
+ */
+inline size_t num_of_elements_in_range(const float start, const float end, const float step)
+{
+    ARM_COMPUTE_ERROR_ON_MSG(step == 0, "Range Step cannot be 0");
+    return size_t(std::ceil((end - start) / step));
+}
+
+/** 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;
+    }
+}
+
 #ifdef ARM_COMPUTE_DEBUG_ENABLED
 /** Print consecutive elements to an output stream.
  *
-- 
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