1 files changed, 341 insertions, 0 deletions
diff --git a/third_party/eigen3/unsupported/Eigen/CXX11/src/FixedPoint/FixedPointTypes.h b/third_party/eigen3/unsupported/Eigen/CXX11/src/FixedPoint/FixedPointTypes.h
new file mode 100644
index 0000000000..564729ce48
--- /dev/null
+++ b/third_party/eigen3/unsupported/Eigen/CXX11/src/FixedPoint/FixedPointTypes.h
@@ -0,0 +1,341 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2015 Benoit Steiner <benoit.steiner.goog@gmail.com>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef EIGEN_CXX11_FIXED_POINT_TYPES_H
+#define EIGEN_CXX11_FIXED_POINT_TYPES_H
+
+#include <cmath>
+#include <iostream>
+
+namespace Eigen {
+
+// The mantissa part of the fixed point representation. See
+// go/tensorfixedpoint for details
+struct QInt8;
+struct QUInt8;
+struct QInt16;
+struct QUInt16;
+struct QInt32;
+
+template <>
+struct NumTraits<QInt8> : GenericNumTraits<int8_t> {};
+template <>
+struct NumTraits<QUInt8> : GenericNumTraits<uint8_t> {};
+template <>
+struct NumTraits<QInt16> : GenericNumTraits<int16_t> {};
+template <>
+struct NumTraits<QUInt16> : GenericNumTraits<uint16_t> {};
+template <>
+struct NumTraits<QInt32> : GenericNumTraits<int32_t> {};
+
+namespace internal {
+template <>
+struct scalar_product_traits<QInt32, double> {
+  enum {
+    // Cost = NumTraits<T>::MulCost,
+    Defined = 1
+  };
+  typedef QInt32 ReturnType;
+};
+}
+
+// Wrap the 8bit int into a QInt8 struct instead of using a typedef to prevent
+// the compiler from silently type cast the mantissa into a bigger or a smaller
+// representation.
+struct QInt8 {
+  QInt8() {}
+  QInt8(const int8_t v) : value(v) {}
+  QInt8(const QInt32 v);
+
+  operator int() const { return static_cast<int>(value); }
+
+  int8_t value;
+};
+
+struct QUInt8 {
+  QUInt8() {}
+  QUInt8(const uint8_t v) : value(v) {}
+  QUInt8(const QInt32 v);
+
+  operator int() const { return static_cast<int>(value); }
+
+  uint8_t value;
+};
+
+struct QInt16 {
+  QInt16() {}
+  QInt16(const int16_t v) : value(v) {}
+  QInt16(const QInt32 v);
+  operator int() const { return static_cast<int>(value); }
+
+  int16_t value;
+};
+
+struct QUInt16 {
+  QUInt16() {}
+  QUInt16(const uint16_t v) : value(v) {}
+  QUInt16(const QInt32 v);
+  operator int() const { return static_cast<int>(value); }
+
+  uint16_t value;
+};
+
+struct QInt32 {
+  QInt32() {}
+  QInt32(const int8_t v) : value(v) {}
+  QInt32(const int32_t v) : value(v) {}
+  QInt32(const QInt8 v) : value(v.value) {}
+  QInt32(const float v) : value(static_cast<int32_t>(lrint(v))) {}
+#ifdef EIGEN_MAKING_DOCS
+  // Workaround to fix build on PPC.
+  QInt32(unsigned long v) : value(v) {}
+#endif
+
+  operator float() const { return static_cast<float>(value); }
+
+  int32_t value;
+};
+
+EIGEN_STRONG_INLINE QInt8::QInt8(const QInt32 v)
+    : value(v.value > 127 ? 127 : (v.value < -128 ? -128 : v.value)) {}
+EIGEN_STRONG_INLINE QUInt8::QUInt8(const QInt32 v)
+    : value(v.value > 255 ? 255 : (v.value < 0 ? 0 : v.value)) {}
+EIGEN_STRONG_INLINE QInt16::QInt16(const QInt32 v)
+    : value(v.value > 32767 ? 32767 : (v.value < -32768 ? -32768 : v.value)) {}
+EIGEN_STRONG_INLINE QUInt16::QUInt16(const QInt32 v)
+    : value(v.value > 65535 ? 65535 : (v.value < 0 ? 0 : v.value)) {}
+
+// Basic widening 8-bit operations: This will be vectorized in future CLs.
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt8 a, const QInt8 b) {
+  return QInt32(static_cast<int32_t>(a.value) * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt8 a, const QUInt8 b) {
+  return QInt32(static_cast<int32_t>(a.value) * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt8 a, const QInt8 b) {
+  return QInt32(static_cast<int32_t>(a.value) + static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt8 a, const QInt8 b) {
+  return QInt32(static_cast<int32_t>(a.value) - static_cast<int32_t>(b.value));
+}
+
+// Basic widening 16-bit operations: This will be vectorized in future CLs.
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt16 a, const QInt16 b) {
+  return QInt32(static_cast<int32_t>(a.value) * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt16 a, const QUInt16 b) {
+  return QInt32(static_cast<int32_t>(a.value) * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt16 a, const QInt16 b) {
+  return QInt32(static_cast<int32_t>(a.value) + static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt16 a, const QInt16 b) {
+  return QInt32(static_cast<int32_t>(a.value) - static_cast<int32_t>(b.value));
+}
+
+// Mixed QInt32 op QInt8 operations. This will be vectorized in future CLs.
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt32 a, const QInt8 b) {
+  return QInt32(a.value + static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt8 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) + b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt32 a, const QInt8 b) {
+  return QInt32(a.value - static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt8 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) - b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt32 a, const QInt8 b) {
+  return QInt32(a.value * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt8 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) * b.value);
+}
+
+// Mixed QInt32 op QInt16 operations. This will be vectorized in future CLs.
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt32 a, const QInt16 b) {
+  return QInt32(a.value + static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt16 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) + b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt32 a, const QInt16 b) {
+  return QInt32(a.value - static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt16 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) - b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt32 a, const QInt16 b) {
+  return QInt32(a.value * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt16 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) * b.value);
+}
+
+// Mixed QInt32 op QUInt8 operations. This will be vectorized in future CLs.
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt32 a, const QUInt8 b) {
+  return QInt32(a.value + static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator+(const QUInt8 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) + b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt32 a, const QUInt8 b) {
+  return QInt32(a.value - static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QUInt8 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) - b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt32 a, const QUInt8 b) {
+  return QInt32(a.value * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QUInt8 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) * b.value);
+}
+
+// Mixed QInt32 op QUInt16 operations. This will be vectorized in future CLs.
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt32 a, const QUInt16 b) {
+  return QInt32(a.value + static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator+(const QUInt16 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) + b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt32 a, const QUInt16 b) {
+  return QInt32(a.value - static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QUInt16 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) - b.value);
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt32 a, const QUInt16 b) {
+  return QInt32(a.value * static_cast<int32_t>(b.value));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QUInt16 a, const QInt32 b) {
+  return QInt32(static_cast<int32_t>(a.value) * b.value);
+}
+
+// Basic arithmetic operations on QInt32, which behaves like a int32_t.
+EIGEN_STRONG_INLINE QInt32 operator+(const QInt32 a, const QInt32 b) {
+  return a.value + b.value;
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt32 a, const QInt32 b) {
+  return a.value - b.value;
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt32 a, const QInt32 b) {
+  return a.value * b.value;
+}
+EIGEN_STRONG_INLINE QInt32 operator/(const QInt32 a, const QInt32 b) {
+  return a.value / b.value;
+}
+EIGEN_STRONG_INLINE QInt32& operator+=(QInt32& a, const QInt32 b) {
+  a.value += b.value;
+  return a;
+}
+EIGEN_STRONG_INLINE QInt32& operator-=(QInt32& a, const QInt32 b) {
+  a.value -= b.value;
+  return a;
+}
+EIGEN_STRONG_INLINE QInt32& operator*=(QInt32& a, const QInt32 b) {
+  a.value *= b.value;
+  return a;
+}
+EIGEN_STRONG_INLINE QInt32& operator/=(QInt32& a, const QInt32 b) {
+  a.value /= b.value;
+  return a;
+}
+EIGEN_STRONG_INLINE QInt32 operator-(const QInt32 a) {
+  return -a.value;
+}
+
+// Scaling QInt32 by double. We do the arithmetic in double because
+// float only has 23 bits of mantissa, so casting QInt32 to float might reduce
+// accuracy by discarding up to 7 (least significant) bits.
+EIGEN_STRONG_INLINE QInt32 operator*(const QInt32 a, const double b) {
+  return static_cast<int32_t>(lrint(static_cast<double>(a.value) * b));
+}
+EIGEN_STRONG_INLINE QInt32 operator*(const double a, const QInt32 b) {
+  return static_cast<int32_t>(lrint(a * static_cast<double>(b.value)));
+}
+EIGEN_STRONG_INLINE QInt32& operator*=(QInt32& a, const double b) {
+  a.value = static_cast<int32_t>(lrint(static_cast<double>(a.value) * b));
+  return a;
+}
+
+// Comparisons
+EIGEN_STRONG_INLINE bool operator==(const QInt8 a, const QInt8 b) {
+  return a.value == b.value;
+}
+EIGEN_STRONG_INLINE bool operator==(const QUInt8 a, const QUInt8 b) {
+  return a.value == b.value;
+}
+EIGEN_STRONG_INLINE bool operator==(const QInt16 a, const QInt16 b) {
+  return a.value == b.value;
+}
+EIGEN_STRONG_INLINE bool operator==(const QUInt16 a, const QUInt16 b) {
+  return a.value == b.value;
+}
+EIGEN_STRONG_INLINE bool operator==(const QInt32 a, const QInt32 b) {
+  return a.value == b.value;
+}
+
+EIGEN_STRONG_INLINE bool operator<(const QInt8 a, const QInt8 b) {
+  return a.value < b.value;
+}
+EIGEN_STRONG_INLINE bool operator<(const QUInt8 a, const QUInt8 b) {
+  return a.value < b.value;
+}
+EIGEN_STRONG_INLINE bool operator<(const QInt16 a, const QInt16 b) {
+  return a.value < b.value;
+}
+EIGEN_STRONG_INLINE bool operator<(const QUInt16 a, const QUInt16 b) {
+  return a.value < b.value;
+}
+EIGEN_STRONG_INLINE bool operator<(const QInt32 a, const QInt32 b) {
+  return a.value < b.value;
+}
+
+EIGEN_STRONG_INLINE bool operator>(const QInt8 a, const QInt8 b) {
+  return a.value > b.value;
+}
+EIGEN_STRONG_INLINE bool operator>(const QUInt8 a, const QUInt8 b) {
+  return a.value > b.value;
+}
+EIGEN_STRONG_INLINE bool operator>(const QInt16 a, const QInt16 b) {
+  return a.value > b.value;
+}
+EIGEN_STRONG_INLINE bool operator>(const QUInt16 a, const QUInt16 b) {
+  return a.value > b.value;
+}
+EIGEN_STRONG_INLINE bool operator>(const QInt32 a, const QInt32 b) {
+  return a.value > b.value;
+}
+
+EIGEN_STRONG_INLINE std::ostream& operator<<(std::ostream& os, QInt8 a) {
+  os << static_cast<int>(a.value);
+  return os;
+}
+EIGEN_STRONG_INLINE std::ostream& operator<<(std::ostream& os, QUInt8 a) {
+  os << static_cast<int>(a.value);
+  return os;
+}
+EIGEN_STRONG_INLINE std::ostream& operator<<(std::ostream& os, QInt16 a) {
+  os << static_cast<int>(a.value);
+  return os;
+}
+EIGEN_STRONG_INLINE std::ostream& operator<<(std::ostream& os, QUInt16 a) {
+  os << static_cast<int>(a.value);
+  return os;
+}
+EIGEN_STRONG_INLINE std::ostream& operator<<(std::ostream& os, QInt32 a) {
+  os << a.value;
+  return os;
+}
+
+}  // namespace Eigen
+
+#endif  // EIGEN_CXX11_FIXED_POINT_TYPES_H