From 61203453aaca4e47c05c598a673150522160ca87 Mon Sep 17 00:00:00 2001
From: Cedric Nugteren <web@cedricnugteren.nl>
Date: Sun, 19 Jun 2016 13:55:49 +0200
Subject: Renamed all C++ source files to .cpp to match the .hpp extension
 better

---
 src/utilities.cpp | 390 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 390 insertions(+)
 create mode 100644 src/utilities.cpp

(limited to 'src/utilities.cpp')

diff --git a/src/utilities.cpp b/src/utilities.cpp
new file mode 100644
index 00000000..e3a1fb75
--- /dev/null
+++ b/src/utilities.cpp
@@ -0,0 +1,390 @@
+
+// =================================================================================================
+// This file is part of the CLBlast project. The project is licensed under Apache Version 2.0. This
+// project loosely follows the Google C++ styleguide and uses a tab-size of two spaces and a max-
+// width of 100 characters per line.
+//
+// Author(s):
+//   Cedric Nugteren <www.cedricnugteren.nl>
+//
+// This file implements the common (test) utility functions.
+//
+// =================================================================================================
+
+#include "utilities.hpp"
+
+#include <string>
+#include <vector>
+#include <chrono>
+#include <random>
+#include <iomanip>
+
+namespace clblast {
+// =================================================================================================
+
+// Returns a scalar with a default value
+template <typename T>
+T GetScalar() {
+  return static_cast<T>(2.0);
+}
+template float GetScalar<float>();
+template double GetScalar<double>();
+
+// Specialized version of the above for half-precision
+template <>
+half GetScalar() {
+  return FloatToHalf(2.0f);
+}
+
+// Specialized versions of the above for complex data-types
+template <>
+float2 GetScalar() {
+  return {2.0f, 0.5f};
+}
+template <>
+double2 GetScalar() {
+  return {2.0, 0.5};
+}
+
+// Returns a scalar of value 1
+template <typename T>
+T ConstantOne() {
+  return static_cast<T>(1.0);
+}
+template float ConstantOne<float>();
+template double ConstantOne<double>();
+
+// Specialized version of the above for half-precision
+template <>
+half ConstantOne() {
+  return FloatToHalf(1.0f);
+}
+
+// Specialized versions of the above for complex data-types
+template <>
+float2 ConstantOne() {
+  return {1.0f, 0.0f};
+}
+template <>
+double2 ConstantOne() {
+  return {1.0, 0.0};
+}
+
+// =================================================================================================
+
+// Implements the string conversion using std::to_string if possible
+template <typename T>
+std::string ToString(T value) {
+  return std::to_string(value);
+}
+template std::string ToString<int>(int value);
+template std::string ToString<size_t>(size_t value);
+template std::string ToString<float>(float value);
+template std::string ToString<double>(double value);
+
+// If not possible directly: special cases for complex data-types
+template <>
+std::string ToString(float2 value) {
+  std::ostringstream real, imag;
+  real << std::setprecision(2) << value.real();
+  imag << std::setprecision(2) << value.imag();
+  return real.str()+"+"+imag.str()+"i";
+}
+template <>
+std::string ToString(double2 value) {
+  std::ostringstream real, imag;
+  real << std::setprecision(2) << value.real();
+  imag << std::setprecision(2) << value.imag();
+  return real.str()+"+"+imag.str()+"i";
+}
+
+// If not possible directly: special case for half-precision
+template <>
+std::string ToString(half value) {
+  return std::to_string(HalfToFloat(value));
+}
+
+// If not possible directly: special cases for CLBlast data-types
+template <>
+std::string ToString(Layout value) {
+  switch(value) {
+    case Layout::kRowMajor: return ToString(static_cast<int>(value))+" (row-major)";
+    case Layout::kColMajor: return ToString(static_cast<int>(value))+" (col-major)";
+  }
+}
+template <>
+std::string ToString(Transpose value) {
+  switch(value) {
+    case Transpose::kNo: return ToString(static_cast<int>(value))+" (regular)";
+    case Transpose::kYes: return ToString(static_cast<int>(value))+" (transposed)";
+    case Transpose::kConjugate: return ToString(static_cast<int>(value))+" (conjugate)";
+  }
+}
+template <>
+std::string ToString(Side value) {
+  switch(value) {
+    case Side::kLeft: return ToString(static_cast<int>(value))+" (left)";
+    case Side::kRight: return ToString(static_cast<int>(value))+" (right)";
+  }
+}
+template <>
+std::string ToString(Triangle value) {
+  switch(value) {
+    case Triangle::kUpper: return ToString(static_cast<int>(value))+" (upper)";
+    case Triangle::kLower: return ToString(static_cast<int>(value))+" (lower)";
+  }
+}
+template <>
+std::string ToString(Diagonal value) {
+  switch(value) {
+    case Diagonal::kUnit: return ToString(static_cast<int>(value))+" (unit)";
+    case Diagonal::kNonUnit: return ToString(static_cast<int>(value))+" (non-unit)";
+  }
+}
+template <>
+std::string ToString(Precision value) {
+  switch(value) {
+    case Precision::kHalf: return ToString(static_cast<int>(value))+" (half)";
+    case Precision::kSingle: return ToString(static_cast<int>(value))+" (single)";
+    case Precision::kDouble: return ToString(static_cast<int>(value))+" (double)";
+    case Precision::kComplexSingle: return ToString(static_cast<int>(value))+" (complex-single)";
+    case Precision::kComplexDouble: return ToString(static_cast<int>(value))+" (complex-double)";
+  }
+}
+
+// =================================================================================================
+
+// Helper for the below function to convert the argument to the value type. Adds specialization for
+// complex data-types. Note that complex arguments are accepted as regular values and are copied to
+// both the real and imaginary parts.
+template <typename T>
+T ConvertArgument(const char* value) {
+  return static_cast<T>(std::stoi(value));
+}
+template <> half ConvertArgument(const char* value) {
+  return FloatToHalf(static_cast<float>(std::stod(value)));
+}
+template <> float ConvertArgument(const char* value) {
+  return static_cast<float>(std::stod(value));
+}
+template <> double ConvertArgument(const char* value) {
+  return static_cast<double>(std::stod(value));
+}
+template <> float2 ConvertArgument(const char* value) {
+  auto val = static_cast<float>(std::stod(value));
+  return float2{val, val};
+}
+template <> double2 ConvertArgument(const char* value) {
+  auto val = static_cast<double>(std::stod(value));
+  return double2{val, val};
+}
+
+// This function matches patterns in the form of "-option value" or "--option value". It returns a
+// default value in case the option is not found in the argument string.
+template <typename T>
+T GetArgument(const int argc, char *argv[], std::string &help,
+              const std::string &option, const T default_value) {
+
+  // Parses the argument. Note that this supports both the given option (e.g. -device) and one with
+  // an extra dash in front (e.g. --device).
+  auto return_value = static_cast<T>(default_value);
+  for (int c=0; c<argc; ++c) {
+    auto item = std::string{argv[c]};
+    if (item.compare("-"+option) == 0 || item.compare("--"+option) == 0) {
+      ++c;
+      return_value = ConvertArgument<T>(argv[c]);
+      break;
+    }
+  }
+
+  // Updates the help message and returns
+  help += "    -"+option+" "+ToString(return_value)+" ";
+  help += (return_value == default_value) ? "[=default]\n" : "\n";
+  return return_value;
+}
+
+// Compiles the above function
+template int GetArgument<int>(const int, char **, std::string&, const std::string&, const int);
+template size_t GetArgument<size_t>(const int, char **, std::string&, const std::string&, const size_t);
+template half GetArgument<half>(const int, char **, std::string&, const std::string&, const half);
+template float GetArgument<float>(const int, char **, std::string&, const std::string&, const float);
+template double GetArgument<double>(const int, char **, std::string&, const std::string&, const double);
+template float2 GetArgument<float2>(const int, char **, std::string&, const std::string&, const float2);
+template double2 GetArgument<double2>(const int, char **, std::string&, const std::string&, const double2);
+template Layout GetArgument<Layout>(const int, char **, std::string&, const std::string&, const Layout);
+template Transpose GetArgument<Transpose>(const int, char **, std::string&, const std::string&, const Transpose);
+template Side GetArgument<Side>(const int, char **, std::string&, const std::string&, const Side);
+template Triangle GetArgument<Triangle>(const int, char **, std::string&, const std::string&, const Triangle);
+template Diagonal GetArgument<Diagonal>(const int, char **, std::string&, const std::string&, const Diagonal);
+template Precision GetArgument<Precision>(const int, char **, std::string&, const std::string&, const Precision);
+
+// =================================================================================================
+
+// Returns only the precision argument
+Precision GetPrecision(const int argc, char *argv[], const Precision default_precision) {
+  auto dummy = std::string{};
+  return GetArgument(argc, argv, dummy, kArgPrecision, default_precision);
+}
+
+// =================================================================================================
+
+// Checks whether an argument is given. Returns true or false.
+bool CheckArgument(const int argc, char *argv[], std::string &help,
+                   const std::string &option) {
+
+  // Parses the argument. Note that this supports both the given option (e.g. -device) and one with
+  // an extra dash in front (e.g. --device).
+  auto return_value = false;
+  for (int c=0; c<argc; ++c) {
+    auto item = std::string{argv[c]};
+    if (item.compare("-"+option) == 0 || item.compare("--"+option) == 0) {
+      ++c;
+      return_value = true;
+    }
+  }
+
+  // Updates the help message and returns
+  help += "    -"+option+" ";
+  help += (return_value) ? "[true]\n" : "[false]\n";
+  return return_value;
+}
+
+// =================================================================================================
+
+// Returns a random seed. This used to be implemented using 'std::random_device', but that doesn't
+// always work. The chrono-timers are more reliable in that sense, but perhaps less random.
+unsigned int GetRandomSeed() {
+  return static_cast<unsigned int>(std::chrono::system_clock::now().time_since_epoch().count());
+}
+
+// Create a random number generator and populates a vector with samples from a random distribution
+template <typename T>
+void PopulateVector(std::vector<T> &vector) {
+  auto lower_limit = static_cast<T>(kTestDataLowerLimit);
+  auto upper_limit = static_cast<T>(kTestDataUpperLimit);
+  std::mt19937 mt(GetRandomSeed());
+  std::uniform_real_distribution<T> dist(lower_limit, upper_limit);
+  for (auto &element: vector) { element = dist(mt); }
+}
+template void PopulateVector<float>(std::vector<float>&);
+template void PopulateVector<double>(std::vector<double>&);
+
+// Specialized versions of the above for complex data-types
+template <>
+void PopulateVector(std::vector<float2> &vector) {
+  auto lower_limit = static_cast<float>(kTestDataLowerLimit);
+  auto upper_limit = static_cast<float>(kTestDataUpperLimit);
+  std::mt19937 mt(GetRandomSeed());
+  std::uniform_real_distribution<float> dist(lower_limit, upper_limit);
+  for (auto &element: vector) { element.real(dist(mt)); element.imag(dist(mt)); }
+}
+template <>
+void PopulateVector(std::vector<double2> &vector) {
+  auto lower_limit = static_cast<double>(kTestDataLowerLimit);
+  auto upper_limit = static_cast<double>(kTestDataUpperLimit);
+  std::mt19937 mt(GetRandomSeed());
+  std::uniform_real_distribution<double> dist(lower_limit, upper_limit);
+  for (auto &element: vector) { element.real(dist(mt)); element.imag(dist(mt)); }
+}
+
+// Specialized versions of the above for half-precision
+template <>
+void PopulateVector(std::vector<half> &vector) {
+  const auto lower_limit = static_cast<float>(kTestDataLowerLimit);
+  const auto upper_limit = static_cast<float>(kTestDataUpperLimit);
+  std::mt19937 mt(GetRandomSeed());
+  std::uniform_real_distribution<float> dist(lower_limit, upper_limit);
+  for (auto &element: vector) { element = FloatToHalf(dist(mt)); }
+}
+
+// =================================================================================================
+
+// Conversion between half and single-precision
+std::vector<float> HalfToFloatBuffer(const std::vector<half>& source) {
+  auto result = std::vector<float>(source.size());
+  for (auto i = size_t(0); i < source.size(); ++i) { result[i] = HalfToFloat(source[i]); }
+  return result;
+}
+void FloatToHalfBuffer(std::vector<half>& result, const std::vector<float>& source) {
+  for (auto i = size_t(0); i < source.size(); ++i) { result[i] = FloatToHalf(source[i]); }
+}
+
+// As above, but now for OpenCL data-types instead of std::vectors
+Buffer<float> HalfToFloatBuffer(const Buffer<half>& source, cl_command_queue queue_raw) {
+  const auto size = source.GetSize() / sizeof(half);
+  auto queue = Queue(queue_raw);
+  auto context = queue.GetContext();
+  auto source_cpu = std::vector<half>(size);
+  source.Read(queue, size, source_cpu);
+  auto result_cpu = HalfToFloatBuffer(source_cpu);
+  auto result = Buffer<float>(context, size);
+  result.Write(queue, size, result_cpu);
+  return result;
+}
+void FloatToHalfBuffer(Buffer<half>& result, const Buffer<float>& source, cl_command_queue queue_raw) {
+  const auto size = source.GetSize() / sizeof(float);
+  auto queue = Queue(queue_raw);
+  auto context = queue.GetContext();
+  auto source_cpu = std::vector<float>(size);
+  source.Read(queue, size, source_cpu);
+  auto result_cpu = std::vector<half>(size);
+  FloatToHalfBuffer(result_cpu, source_cpu);
+  result.Write(queue, size, result_cpu);
+}
+
+// =================================================================================================
+
+// Rounding functions performing ceiling and division operations
+size_t CeilDiv(const size_t x, const size_t y) {
+  return 1 + ((x - 1) / y);
+}
+size_t Ceil(const size_t x, const size_t y) {
+  return CeilDiv(x,y)*y;
+}
+
+// Helper function to determine whether or not 'a' is a multiple of 'b'
+bool IsMultiple(const size_t a, const size_t b) {
+  return ((a/b)*b == a) ? true : false;
+};
+
+// =================================================================================================
+
+// Convert the precision enum (as integer) into bytes
+size_t GetBytes(const Precision precision) {
+  switch(precision) {
+    case Precision::kHalf: return 2;
+    case Precision::kSingle: return 4;
+    case Precision::kDouble: return 8;
+    case Precision::kComplexSingle: return 8;
+    case Precision::kComplexDouble: return 16;
+  }
+}
+
+// Convert the template argument into a precision value
+template <> Precision PrecisionValue<half>() { return Precision::kHalf; }
+template <> Precision PrecisionValue<float>() { return Precision::kSingle; }
+template <> Precision PrecisionValue<double>() { return Precision::kDouble; }
+template <> Precision PrecisionValue<float2>() { return Precision::kComplexSingle; }
+template <> Precision PrecisionValue<double2>() { return Precision::kComplexDouble; }
+
+// =================================================================================================
+
+// Returns false is this precision is not supported by the device
+template <> bool PrecisionSupported<float>(const Device &) { return true; }
+template <> bool PrecisionSupported<float2>(const Device &) { return true; }
+template <> bool PrecisionSupported<double>(const Device &device) {
+  auto extensions = device.Capabilities();
+  return (extensions.find(kKhronosDoublePrecision) == std::string::npos) ? false : true;
+}
+template <> bool PrecisionSupported<double2>(const Device &device) {
+  auto extensions = device.Capabilities();
+  return (extensions.find(kKhronosDoublePrecision) == std::string::npos) ? false : true;
+}
+template <> bool PrecisionSupported<half>(const Device &device) {
+  auto extensions = device.Capabilities();
+  if (device.Name() == "Mali-T628") { return true; } // supports fp16 but not cl_khr_fp16 officially
+  return (extensions.find(kKhronosHalfPrecision) == std::string::npos) ? false : true;
+}
+
+// =================================================================================================
+} // namespace clblast
-- 
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