diff --git a/libs/math/Android.bp b/libs/math/Android.bp
new file mode 100644
index 0000000..3ef8b4a
--- /dev/null
+++ b/libs/math/Android.bp
@@ -0,0 +1,21 @@
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+cc_library_static {
+    name: "libmath",
+    host_supported: true,
+    export_include_dirs: ["include"],
+}
+
+subdirs = ["tests"]
diff --git a/libs/math/MODULE_LICENSE_APACHE2 b/libs/math/MODULE_LICENSE_APACHE2
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/libs/math/MODULE_LICENSE_APACHE2
diff --git a/libs/math/NOTICE b/libs/math/NOTICE
new file mode 100644
index 0000000..c5b1efa
--- /dev/null
+++ b/libs/math/NOTICE
@@ -0,0 +1,190 @@
+
+   Copyright (c) 2005-2008, The Android Open Source Project
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
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+      other entities that control, are controlled by, or are under common
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+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
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+
+      "Work" shall mean the work of authorship, whether in Source or
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+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
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+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
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+   9. Accepting Warranty or Additional Liability. While redistributing
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+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
diff --git a/libs/math/include/math/TMatHelpers.h b/libs/math/include/math/TMatHelpers.h
new file mode 100644
index 0000000..478e702
--- /dev/null
+++ b/libs/math/include/math/TMatHelpers.h
@@ -0,0 +1,637 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <cmath>
+#include <exception>
+#include <iomanip>
+#include <stdexcept>
+
+#include <math/quat.h>
+#include <math/TVecHelpers.h>
+
+#include  <utils/String8.h>
+
+#ifdef __cplusplus
+#   define LIKELY( exp )    (__builtin_expect( !!(exp), true ))
+#   define UNLIKELY( exp )  (__builtin_expect( !!(exp), false ))
+#else
+#   define LIKELY( exp )    (__builtin_expect( !!(exp), 1 ))
+#   define UNLIKELY( exp )  (__builtin_expect( !!(exp), 0 ))
+#endif
+
+#define PURE __attribute__((pure))
+
+#if __cplusplus >= 201402L
+#define CONSTEXPR constexpr
+#else
+#define CONSTEXPR
+#endif
+
+namespace android {
+namespace details {
+// -------------------------------------------------------------------------------------
+
+/*
+ * No user serviceable parts here.
+ *
+ * Don't use this file directly, instead include ui/mat*.h
+ */
+
+
+/*
+ * Matrix utilities
+ */
+
+namespace matrix {
+
+inline constexpr int     transpose(int v)    { return v; }
+inline constexpr float   transpose(float v)  { return v; }
+inline constexpr double  transpose(double v) { return v; }
+
+inline constexpr int     trace(int v)    { return v; }
+inline constexpr float   trace(float v)  { return v; }
+inline constexpr double  trace(double v) { return v; }
+
+/*
+ * Matrix inversion
+ */
+template<typename MATRIX>
+MATRIX PURE gaussJordanInverse(const MATRIX& src) {
+    typedef typename MATRIX::value_type T;
+    static constexpr unsigned int N = MATRIX::NUM_ROWS;
+    MATRIX tmp(src);
+    MATRIX inverted(1);
+
+    for (size_t i = 0; i < N; ++i) {
+        // look for largest element in i'th column
+        size_t swap = i;
+        T t = std::abs(tmp[i][i]);
+        for (size_t j = i + 1; j < N; ++j) {
+            const T t2 = std::abs(tmp[j][i]);
+            if (t2 > t) {
+                swap = j;
+                t = t2;
+            }
+        }
+
+        if (swap != i) {
+            // swap columns.
+            std::swap(tmp[i], tmp[swap]);
+            std::swap(inverted[i], inverted[swap]);
+        }
+
+        const T denom(tmp[i][i]);
+        for (size_t k = 0; k < N; ++k) {
+            tmp[i][k] /= denom;
+            inverted[i][k] /= denom;
+        }
+
+        // Factor out the lower triangle
+        for (size_t j = 0; j < N; ++j) {
+            if (j != i) {
+                const T d = tmp[j][i];
+                for (size_t k = 0; k < N; ++k) {
+                    tmp[j][k] -= tmp[i][k] * d;
+                    inverted[j][k] -= inverted[i][k] * d;
+                }
+            }
+        }
+    }
+
+    return inverted;
+}
+
+
+//------------------------------------------------------------------------------
+// 2x2 matrix inverse is easy.
+template <typename MATRIX>
+CONSTEXPR MATRIX PURE fastInverse2(const MATRIX& x) {
+    typedef typename MATRIX::value_type T;
+
+    // Assuming the input matrix is:
+    // | a b |
+    // | c d |
+    //
+    // The analytic inverse is
+    // | d -b |
+    // | -c a | / (a d - b c)
+    //
+    // Importantly, our matrices are column-major!
+
+    MATRIX inverted(MATRIX::NO_INIT);
+
+    const T a = x[0][0];
+    const T c = x[0][1];
+    const T b = x[1][0];
+    const T d = x[1][1];
+
+    const T det((a * d) - (b * c));
+    inverted[0][0] =  d / det;
+    inverted[0][1] = -c / det;
+    inverted[1][0] = -b / det;
+    inverted[1][1] =  a / det;
+    return inverted;
+}
+
+
+//------------------------------------------------------------------------------
+// From the Wikipedia article on matrix inversion's section on fast 3x3
+// matrix inversion:
+// http://en.wikipedia.org/wiki/Invertible_matrix#Inversion_of_3.C3.973_matrices
+template <typename MATRIX>
+CONSTEXPR MATRIX PURE fastInverse3(const MATRIX& x) {
+    typedef typename MATRIX::value_type T;
+
+    // Assuming the input matrix is:
+    // | a b c |
+    // | d e f |
+    // | g h i |
+    //
+    // The analytic inverse is
+    // | A B C |^T
+    // | D E F |
+    // | G H I | / determinant
+    //
+    // Which is
+    // | A D G |
+    // | B E H |
+    // | C F I | / determinant
+    //
+    // Where:
+    // A = (ei - fh), B = (fg - di), C = (dh - eg)
+    // D = (ch - bi), E = (ai - cg), F = (bg - ah)
+    // G = (bf - ce), H = (cd - af), I = (ae - bd)
+    //
+    // and the determinant is a*A + b*B + c*C (The rule of Sarrus)
+    //
+    // Importantly, our matrices are column-major!
+
+    MATRIX inverted(MATRIX::NO_INIT);
+
+    const T a = x[0][0];
+    const T b = x[1][0];
+    const T c = x[2][0];
+    const T d = x[0][1];
+    const T e = x[1][1];
+    const T f = x[2][1];
+    const T g = x[0][2];
+    const T h = x[1][2];
+    const T i = x[2][2];
+
+    // Do the full analytic inverse
+    const T A = e * i - f * h;
+    const T B = f * g - d * i;
+    const T C = d * h - e * g;
+    inverted[0][0] = A;                 // A
+    inverted[0][1] = B;                 // B
+    inverted[0][2] = C;                 // C
+    inverted[1][0] = c * h - b * i;     // D
+    inverted[1][1] = a * i - c * g;     // E
+    inverted[1][2] = b * g - a * h;     // F
+    inverted[2][0] = b * f - c * e;     // G
+    inverted[2][1] = c * d - a * f;     // H
+    inverted[2][2] = a * e - b * d;     // I
+
+    const T det(a * A + b * B + c * C);
+    for (size_t col = 0; col < 3; ++col) {
+        for (size_t row = 0; row < 3; ++row) {
+            inverted[col][row] /= det;
+        }
+    }
+
+    return inverted;
+}
+
+/**
+ * Inversion function which switches on the matrix size.
+ * @warning This function assumes the matrix is invertible. The result is
+ * undefined if it is not. It is the responsibility of the caller to
+ * make sure the matrix is not singular.
+ */
+template <typename MATRIX>
+inline constexpr MATRIX PURE inverse(const MATRIX& matrix) {
+    static_assert(MATRIX::NUM_ROWS == MATRIX::NUM_COLS, "only square matrices can be inverted");
+    return (MATRIX::NUM_ROWS == 2) ? fastInverse2<MATRIX>(matrix) :
+          ((MATRIX::NUM_ROWS == 3) ? fastInverse3<MATRIX>(matrix) :
+                    gaussJordanInverse<MATRIX>(matrix));
+}
+
+template<typename MATRIX_R, typename MATRIX_A, typename MATRIX_B>
+CONSTEXPR MATRIX_R PURE multiply(const MATRIX_A& lhs, const MATRIX_B& rhs) {
+    // pre-requisite:
+    //  lhs : D columns, R rows
+    //  rhs : C columns, D rows
+    //  res : C columns, R rows
+
+    static_assert(MATRIX_A::NUM_COLS == MATRIX_B::NUM_ROWS,
+            "matrices can't be multiplied. invalid dimensions.");
+    static_assert(MATRIX_R::NUM_COLS == MATRIX_B::NUM_COLS,
+            "invalid dimension of matrix multiply result.");
+    static_assert(MATRIX_R::NUM_ROWS == MATRIX_A::NUM_ROWS,
+            "invalid dimension of matrix multiply result.");
+
+    MATRIX_R res(MATRIX_R::NO_INIT);
+    for (size_t col = 0; col < MATRIX_R::NUM_COLS; ++col) {
+        res[col] = lhs * rhs[col];
+    }
+    return res;
+}
+
+// transpose. this handles matrices of matrices
+template <typename MATRIX>
+CONSTEXPR MATRIX PURE transpose(const MATRIX& m) {
+    // for now we only handle square matrix transpose
+    static_assert(MATRIX::NUM_COLS == MATRIX::NUM_ROWS, "transpose only supports square matrices");
+    MATRIX result(MATRIX::NO_INIT);
+    for (size_t col = 0; col < MATRIX::NUM_COLS; ++col) {
+        for (size_t row = 0; row < MATRIX::NUM_ROWS; ++row) {
+            result[col][row] = transpose(m[row][col]);
+        }
+    }
+    return result;
+}
+
+// trace. this handles matrices of matrices
+template <typename MATRIX>
+CONSTEXPR typename MATRIX::value_type PURE trace(const MATRIX& m) {
+    static_assert(MATRIX::NUM_COLS == MATRIX::NUM_ROWS, "trace only defined for square matrices");
+    typename MATRIX::value_type result(0);
+    for (size_t col = 0; col < MATRIX::NUM_COLS; ++col) {
+        result += trace(m[col][col]);
+    }
+    return result;
+}
+
+// diag. this handles matrices of matrices
+template <typename MATRIX>
+CONSTEXPR typename MATRIX::col_type PURE diag(const MATRIX& m) {
+    static_assert(MATRIX::NUM_COLS == MATRIX::NUM_ROWS, "diag only defined for square matrices");
+    typename MATRIX::col_type result(MATRIX::col_type::NO_INIT);
+    for (size_t col = 0; col < MATRIX::NUM_COLS; ++col) {
+        result[col] = m[col][col];
+    }
+    return result;
+}
+
+//------------------------------------------------------------------------------
+// This is taken from the Imath MatrixAlgo code, and is identical to Eigen.
+template <typename MATRIX>
+TQuaternion<typename MATRIX::value_type> extractQuat(const MATRIX& mat) {
+    typedef typename MATRIX::value_type T;
+
+    TQuaternion<T> quat(TQuaternion<T>::NO_INIT);
+
+    // Compute the trace to see if it is positive or not.
+    const T trace = mat[0][0] + mat[1][1] + mat[2][2];
+
+    // check the sign of the trace
+    if (LIKELY(trace > 0)) {
+        // trace is positive
+        T s = std::sqrt(trace + 1);
+        quat.w = T(0.5) * s;
+        s = T(0.5) / s;
+        quat.x = (mat[1][2] - mat[2][1]) * s;
+        quat.y = (mat[2][0] - mat[0][2]) * s;
+        quat.z = (mat[0][1] - mat[1][0]) * s;
+    } else {
+        // trace is negative
+
+        // Find the index of the greatest diagonal
+        size_t i = 0;
+        if (mat[1][1] > mat[0][0]) { i = 1; }
+        if (mat[2][2] > mat[i][i]) { i = 2; }
+
+        // Get the next indices: (n+1)%3
+        static constexpr size_t next_ijk[3] = { 1, 2, 0 };
+        size_t j = next_ijk[i];
+        size_t k = next_ijk[j];
+        T s = std::sqrt((mat[i][i] - (mat[j][j] + mat[k][k])) + 1);
+        quat[i] = T(0.5) * s;
+        if (s != 0) {
+            s = T(0.5) / s;
+        }
+        quat.w  = (mat[j][k] - mat[k][j]) * s;
+        quat[j] = (mat[i][j] + mat[j][i]) * s;
+        quat[k] = (mat[i][k] + mat[k][i]) * s;
+    }
+    return quat;
+}
+
+template <typename MATRIX>
+String8 asString(const MATRIX& m) {
+    String8 s;
+    for (size_t c = 0; c < MATRIX::col_size(); c++) {
+        s.append("|  ");
+        for (size_t r = 0; r < MATRIX::row_size(); r++) {
+            s.appendFormat("%7.2f  ", m[r][c]);
+        }
+        s.append("|\n");
+    }
+    return s;
+}
+
+}  // namespace matrix
+
+// -------------------------------------------------------------------------------------
+
+/*
+ * TMatProductOperators implements basic arithmetic and basic compound assignments
+ * operators on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TMatProductOperators<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+
+template <template<typename T> class BASE, typename T>
+class TMatProductOperators {
+public:
+    // multiply by a scalar
+    BASE<T>& operator *= (T v) {
+        BASE<T>& lhs(static_cast< BASE<T>& >(*this));
+        for (size_t col = 0; col < BASE<T>::NUM_COLS; ++col) {
+            lhs[col] *= v;
+        }
+        return lhs;
+    }
+
+    //  matrix *= matrix
+    template<typename U>
+    const BASE<T>& operator *= (const BASE<U>& rhs) {
+        BASE<T>& lhs(static_cast< BASE<T>& >(*this));
+        lhs = matrix::multiply<BASE<T> >(lhs, rhs);
+        return lhs;
+    }
+
+    // divide by a scalar
+    BASE<T>& operator /= (T v) {
+        BASE<T>& lhs(static_cast< BASE<T>& >(*this));
+        for (size_t col = 0; col < BASE<T>::NUM_COLS; ++col) {
+            lhs[col] /= v;
+        }
+        return lhs;
+    }
+
+    // matrix * matrix, result is a matrix of the same type than the lhs matrix
+    template<typename U>
+    friend CONSTEXPR BASE<T> PURE operator *(const BASE<T>& lhs, const BASE<U>& rhs) {
+        return matrix::multiply<BASE<T> >(lhs, rhs);
+    }
+};
+
+/*
+ * TMatSquareFunctions implements functions on a matrix of type BASE<T>.
+ *
+ * BASE only needs to implement:
+ *  - operator[]
+ *  - col_type
+ *  - row_type
+ *  - COL_SIZE
+ *  - ROW_SIZE
+ *
+ * By simply inheriting from TMatSquareFunctions<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+
+template<template<typename U> class BASE, typename T>
+class TMatSquareFunctions {
+public:
+
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+    friend inline CONSTEXPR BASE<T> PURE inverse(const BASE<T>& matrix) {
+        return matrix::inverse(matrix);
+    }
+    friend inline constexpr BASE<T> PURE transpose(const BASE<T>& m) {
+        return matrix::transpose(m);
+    }
+    friend inline constexpr T PURE trace(const BASE<T>& m) {
+        return matrix::trace(m);
+    }
+};
+
+template<template<typename U> class BASE, typename T>
+class TMatHelpers {
+public:
+    constexpr inline size_t getColumnSize() const   { return BASE<T>::COL_SIZE; }
+    constexpr inline size_t getRowSize() const      { return BASE<T>::ROW_SIZE; }
+    constexpr inline size_t getColumnCount() const  { return BASE<T>::NUM_COLS; }
+    constexpr inline size_t getRowCount() const     { return BASE<T>::NUM_ROWS; }
+    constexpr inline size_t size()  const           { return BASE<T>::ROW_SIZE; }  // for TVec*<>
+
+    // array access
+    constexpr T const* asArray() const {
+        return &static_cast<BASE<T> const &>(*this)[0][0];
+    }
+
+    // element access
+    inline constexpr T const& operator()(size_t row, size_t col) const {
+        return static_cast<BASE<T> const &>(*this)[col][row];
+    }
+
+    inline T& operator()(size_t row, size_t col) {
+        return static_cast<BASE<T>&>(*this)[col][row];
+    }
+
+    template <typename VEC>
+    static CONSTEXPR BASE<T> translate(const VEC& t) {
+        BASE<T> r;
+        r[BASE<T>::NUM_COLS-1] = t;
+        return r;
+    }
+
+    template <typename VEC>
+    static constexpr BASE<T> scale(const VEC& s) {
+        return BASE<T>(s);
+    }
+
+    friend inline CONSTEXPR BASE<T> PURE abs(BASE<T> m) {
+        for (size_t col = 0; col < BASE<T>::NUM_COLS; ++col) {
+            m[col] = abs(m[col]);
+        }
+        return m;
+    }
+};
+
+// functions for 3x3 and 4x4 matrices
+template<template<typename U> class BASE, typename T>
+class TMatTransform {
+public:
+    inline constexpr TMatTransform() {
+        static_assert(BASE<T>::NUM_ROWS == 3 || BASE<T>::NUM_ROWS == 4, "3x3 or 4x4 matrices only");
+    }
+
+    template <typename A, typename VEC>
+    static CONSTEXPR BASE<T> rotate(A radian, const VEC& about) {
+        BASE<T> r;
+        T c = std::cos(radian);
+        T s = std::sin(radian);
+        if (about.x == 1 && about.y == 0 && about.z == 0) {
+            r[1][1] = c;   r[2][2] = c;
+            r[1][2] = s;   r[2][1] = -s;
+        } else if (about.x == 0 && about.y == 1 && about.z == 0) {
+            r[0][0] = c;   r[2][2] = c;
+            r[2][0] = s;   r[0][2] = -s;
+        } else if (about.x == 0 && about.y == 0 && about.z == 1) {
+            r[0][0] = c;   r[1][1] = c;
+            r[0][1] = s;   r[1][0] = -s;
+        } else {
+            VEC nabout = normalize(about);
+            typename VEC::value_type x = nabout.x;
+            typename VEC::value_type y = nabout.y;
+            typename VEC::value_type z = nabout.z;
+            T nc = 1 - c;
+            T xy = x * y;
+            T yz = y * z;
+            T zx = z * x;
+            T xs = x * s;
+            T ys = y * s;
+            T zs = z * s;
+            r[0][0] = x*x*nc +  c;    r[1][0] =  xy*nc - zs;    r[2][0] =  zx*nc + ys;
+            r[0][1] =  xy*nc + zs;    r[1][1] = y*y*nc +  c;    r[2][1] =  yz*nc - xs;
+            r[0][2] =  zx*nc - ys;    r[1][2] =  yz*nc + xs;    r[2][2] = z*z*nc +  c;
+
+            // Clamp results to -1, 1.
+            for (size_t col = 0; col < 3; ++col) {
+                for (size_t row = 0; row < 3; ++row) {
+                    r[col][row] = std::min(std::max(r[col][row], T(-1)), T(1));
+                }
+            }
+        }
+        return r;
+    }
+
+    /**
+     * Create a matrix from euler angles using YPR around YXZ respectively
+     * @param yaw about Y axis
+     * @param pitch about X axis
+     * @param roll about Z axis
+     */
+    template <
+        typename Y, typename P, typename R,
+        typename = typename std::enable_if<std::is_arithmetic<Y>::value >::type,
+        typename = typename std::enable_if<std::is_arithmetic<P>::value >::type,
+        typename = typename std::enable_if<std::is_arithmetic<R>::value >::type
+    >
+    static CONSTEXPR BASE<T> eulerYXZ(Y yaw, P pitch, R roll) {
+        return eulerZYX(roll, pitch, yaw);
+    }
+
+    /**
+     * Create a matrix from euler angles using YPR around ZYX respectively
+     * @param roll about X axis
+     * @param pitch about Y axis
+     * @param yaw about Z axis
+     *
+     * The euler angles are applied in ZYX order. i.e: a vector is first rotated
+     * about X (roll) then Y (pitch) and then Z (yaw).
+     */
+    template <
+    typename Y, typename P, typename R,
+    typename = typename std::enable_if<std::is_arithmetic<Y>::value >::type,
+    typename = typename std::enable_if<std::is_arithmetic<P>::value >::type,
+    typename = typename std::enable_if<std::is_arithmetic<R>::value >::type
+    >
+    static CONSTEXPR BASE<T> eulerZYX(Y yaw, P pitch, R roll) {
+        BASE<T> r;
+        T cy = std::cos(yaw);
+        T sy = std::sin(yaw);
+        T cp = std::cos(pitch);
+        T sp = std::sin(pitch);
+        T cr = std::cos(roll);
+        T sr = std::sin(roll);
+        T cc = cr * cy;
+        T cs = cr * sy;
+        T sc = sr * cy;
+        T ss = sr * sy;
+        r[0][0] = cp * cy;
+        r[0][1] = cp * sy;
+        r[0][2] = -sp;
+        r[1][0] = sp * sc - cs;
+        r[1][1] = sp * ss + cc;
+        r[1][2] = cp * sr;
+        r[2][0] = sp * cc + ss;
+        r[2][1] = sp * cs - sc;
+        r[2][2] = cp * cr;
+
+        // Clamp results to -1, 1.
+        for (size_t col = 0; col < 3; ++col) {
+            for (size_t row = 0; row < 3; ++row) {
+                r[col][row] = std::min(std::max(r[col][row], T(-1)), T(1));
+            }
+        }
+        return r;
+    }
+
+    TQuaternion<T> toQuaternion() const {
+        return matrix::extractQuat(static_cast<const BASE<T>&>(*this));
+    }
+};
+
+
+template <template<typename T> class BASE, typename T>
+class TMatDebug {
+public:
+    friend std::ostream& operator<<(std::ostream& stream, const BASE<T>& m) {
+        for (size_t row = 0; row < BASE<T>::NUM_ROWS; ++row) {
+            if (row != 0) {
+                stream << std::endl;
+            }
+            if (row == 0) {
+                stream << "/ ";
+            } else if (row == BASE<T>::NUM_ROWS-1) {
+                stream << "\\ ";
+            } else {
+                stream << "| ";
+            }
+            for (size_t col = 0; col < BASE<T>::NUM_COLS; ++col) {
+                stream << std::setw(10) << std::to_string(m[col][row]);
+            }
+            if (row == 0) {
+                stream << " \\";
+            } else if (row == BASE<T>::NUM_ROWS-1) {
+                stream << " /";
+            } else {
+                stream << " |";
+            }
+        }
+        return stream;
+    }
+
+    String8 asString() const {
+        return matrix::asString(static_cast<const BASE<T>&>(*this));
+    }
+};
+
+// -------------------------------------------------------------------------------------
+}  // namespace details
+}  // namespace android
+
+#undef LIKELY
+#undef UNLIKELY
+#undef PURE
+#undef CONSTEXPR
diff --git a/libs/math/include/math/TQuatHelpers.h b/libs/math/include/math/TQuatHelpers.h
new file mode 100644
index 0000000..f0a71ae
--- /dev/null
+++ b/libs/math/include/math/TQuatHelpers.h
@@ -0,0 +1,300 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#pragma once
+
+#include <math.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <iostream>
+
+#include <math/vec3.h>
+
+#define PURE __attribute__((pure))
+
+namespace android {
+namespace details {
+// -------------------------------------------------------------------------------------
+
+/*
+ * No user serviceable parts here.
+ *
+ * Don't use this file directly, instead include ui/quat.h
+ */
+
+
+/*
+ * TQuatProductOperators implements basic arithmetic and basic compound assignment
+ * operators on a quaternion of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TQuatProductOperators<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+
+template <template<typename T> class QUATERNION, typename T>
+class TQuatProductOperators {
+public:
+    /* compound assignment from a another quaternion of the same size but different
+     * element type.
+     */
+    template <typename OTHER>
+    QUATERNION<T>& operator *= (const QUATERNION<OTHER>& r) {
+        QUATERNION<T>& q = static_cast<QUATERNION<T>&>(*this);
+        q = q * r;
+        return q;
+    }
+
+    /* compound assignment products by a scalar
+     */
+    QUATERNION<T>& operator *= (T v) {
+        QUATERNION<T>& lhs = static_cast<QUATERNION<T>&>(*this);
+        for (size_t i = 0; i < QUATERNION<T>::size(); i++) {
+            lhs[i] *= v;
+        }
+        return lhs;
+    }
+    QUATERNION<T>& operator /= (T v) {
+        QUATERNION<T>& lhs = static_cast<QUATERNION<T>&>(*this);
+        for (size_t i = 0; i < QUATERNION<T>::size(); i++) {
+            lhs[i] /= v;
+        }
+        return lhs;
+    }
+
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+
+    /* The operators below handle operation between quaternion of the same size
+     * but of a different element type.
+     */
+    template<typename RT>
+    friend inline
+    constexpr QUATERNION<T> PURE operator *(const QUATERNION<T>& q, const QUATERNION<RT>& r) {
+        // could be written as:
+        //  return QUATERNION<T>(
+        //            q.w*r.w - dot(q.xyz, r.xyz),
+        //            q.w*r.xyz + r.w*q.xyz + cross(q.xyz, r.xyz));
+
+        return QUATERNION<T>(
+                q.w*r.w - q.x*r.x - q.y*r.y - q.z*r.z,
+                q.w*r.x + q.x*r.w + q.y*r.z - q.z*r.y,
+                q.w*r.y - q.x*r.z + q.y*r.w + q.z*r.x,
+                q.w*r.z + q.x*r.y - q.y*r.x + q.z*r.w);
+    }
+
+    template<typename RT>
+    friend inline
+    constexpr TVec3<T> PURE operator *(const QUATERNION<T>& q, const TVec3<RT>& v) {
+        // note: if q is known to be a unit quaternion, then this simplifies to:
+        //  TVec3<T> t = 2 * cross(q.xyz, v)
+        //  return v + (q.w * t) + cross(q.xyz, t)
+        return imaginary(q * QUATERNION<T>(v, 0) * inverse(q));
+    }
+
+
+    /* For quaternions, we use explicit "by a scalar" products because it's much faster
+     * than going (implicitly) through the quaternion multiplication.
+     * For reference: we could use the code below instead, but it would be a lot slower.
+     *  friend inline
+     *  constexpr BASE<T> PURE operator *(const BASE<T>& q, const BASE<T>& r) {
+     *      return BASE<T>(
+     *              q.w*r.w - q.x*r.x - q.y*r.y - q.z*r.z,
+     *              q.w*r.x + q.x*r.w + q.y*r.z - q.z*r.y,
+     *              q.w*r.y - q.x*r.z + q.y*r.w + q.z*r.x,
+     *              q.w*r.z + q.x*r.y - q.y*r.x + q.z*r.w);
+     *
+     */
+    friend inline
+    constexpr QUATERNION<T> PURE operator *(QUATERNION<T> q, T scalar) {
+        // don't pass q by reference because we need a copy anyways
+        return q *= scalar;
+    }
+    friend inline
+    constexpr QUATERNION<T> PURE operator *(T scalar, QUATERNION<T> q) {
+        // don't pass q by reference because we need a copy anyways
+        return q *= scalar;
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE operator /(QUATERNION<T> q, T scalar) {
+        // don't pass q by reference because we need a copy anyways
+        return q /= scalar;
+    }
+};
+
+
+/*
+ * TQuatFunctions implements functions on a quaternion of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TQuatFunctions<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+template <template<typename T> class QUATERNION, typename T>
+class TQuatFunctions {
+public:
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+
+    template<typename RT>
+    friend inline
+    constexpr T PURE dot(const QUATERNION<T>& p, const QUATERNION<RT>& q) {
+        return p.x * q.x +
+               p.y * q.y +
+               p.z * q.z +
+               p.w * q.w;
+    }
+
+    friend inline
+    constexpr T PURE norm(const QUATERNION<T>& q) {
+        return std::sqrt( dot(q, q) );
+    }
+
+    friend inline
+    constexpr T PURE length(const QUATERNION<T>& q) {
+        return norm(q);
+    }
+
+    friend inline
+    constexpr T PURE length2(const QUATERNION<T>& q) {
+        return dot(q, q);
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE normalize(const QUATERNION<T>& q) {
+        return length(q) ? q / length(q) : QUATERNION<T>(1);
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE conj(const QUATERNION<T>& q) {
+        return QUATERNION<T>(q.w, -q.x, -q.y, -q.z);
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE inverse(const QUATERNION<T>& q) {
+        return conj(q) * (1 / dot(q, q));
+    }
+
+    friend inline
+    constexpr T PURE real(const QUATERNION<T>& q) {
+        return q.w;
+    }
+
+    friend inline
+    constexpr TVec3<T> PURE imaginary(const QUATERNION<T>& q) {
+        return q.xyz;
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE unreal(const QUATERNION<T>& q) {
+        return QUATERNION<T>(q.xyz, 0);
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE cross(const QUATERNION<T>& p, const QUATERNION<T>& q) {
+        return unreal(p*q);
+    }
+
+    friend inline
+    QUATERNION<T> PURE exp(const QUATERNION<T>& q) {
+        const T nq(norm(q.xyz));
+        return std::exp(q.w)*QUATERNION<T>((sin(nq)/nq)*q.xyz, cos(nq));
+    }
+
+    friend inline
+    QUATERNION<T> PURE log(const QUATERNION<T>& q) {
+        const T nq(norm(q));
+        return QUATERNION<T>((std::acos(q.w/nq)/norm(q.xyz))*q.xyz, log(nq));
+    }
+
+    friend inline
+    QUATERNION<T> PURE pow(const QUATERNION<T>& q, T a) {
+        // could also be computed as: exp(a*log(q));
+        const T nq(norm(q));
+        const T theta(a*std::acos(q.w / nq));
+        return std::pow(nq, a) * QUATERNION<T>(normalize(q.xyz) * std::sin(theta), std::cos(theta));
+    }
+
+    friend inline
+    QUATERNION<T> PURE slerp(const QUATERNION<T>& p, const QUATERNION<T>& q, T t) {
+        // could also be computed as: pow(q * inverse(p), t) * p;
+        const T d = dot(p, q);
+        const T npq = sqrt(dot(p, p) * dot(q, q));  // ||p|| * ||q||
+        const T a = std::acos(std::abs(d) / npq);
+        const T a0 = a * (1 - t);
+        const T a1 = a * t;
+        const T isina = 1 / sin(a);
+        const T s0 = std::sin(a0) * isina;
+        const T s1 = std::sin(a1) * isina;
+        // ensure we're taking the "short" side
+        return normalize(s0 * p + ((d < 0) ? (-s1) : (s1)) * q);
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE lerp(const QUATERNION<T>& p, const QUATERNION<T>& q, T t) {
+        return ((1 - t) * p) + (t * q);
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE nlerp(const QUATERNION<T>& p, const QUATERNION<T>& q, T t) {
+        return normalize(lerp(p, q, t));
+    }
+
+    friend inline
+    constexpr QUATERNION<T> PURE positive(const QUATERNION<T>& q) {
+        return q.w < 0 ? -q : q;
+    }
+};
+
+/*
+ * TQuatDebug implements functions on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TQuatDebug<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+template <template<typename T> class QUATERNION, typename T>
+class TQuatDebug {
+public:
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+    friend std::ostream& operator<< (std::ostream& stream, const QUATERNION<T>& q) {
+        return stream << "< " << q.w << " + " << q.x << "i + " << q.y << "j + " << q.z << "k >";
+    }
+};
+#undef PURE
+
+// -------------------------------------------------------------------------------------
+}  // namespace details
+}  // namespace android
diff --git a/libs/math/include/math/TVecHelpers.h b/libs/math/include/math/TVecHelpers.h
new file mode 100644
index 0000000..20f852f
--- /dev/null
+++ b/libs/math/include/math/TVecHelpers.h
@@ -0,0 +1,608 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+#pragma once
+
+#include <math.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <cmath>
+#include <limits>
+#include <iostream>
+
+#define PURE __attribute__((pure))
+
+#if __cplusplus >= 201402L
+#define CONSTEXPR constexpr
+#else
+#define CONSTEXPR
+#endif
+
+namespace android {
+namespace details {
+// -------------------------------------------------------------------------------------
+
+/*
+ * No user serviceable parts here.
+ *
+ * Don't use this file directly, instead include ui/vec{2|3|4}.h
+ */
+
+/*
+ * TVec{Add|Product}Operators implements basic arithmetic and basic compound assignments
+ * operators on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TVec{Add|Product}Operators<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+
+template <template<typename T> class VECTOR, typename T>
+class TVecAddOperators {
+public:
+    /* compound assignment from a another vector of the same size but different
+     * element type.
+     */
+    template<typename OTHER>
+    VECTOR<T>& operator +=(const VECTOR<OTHER>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] += v[i];
+        }
+        return lhs;
+    }
+    template<typename OTHER>
+    VECTOR<T>& operator -=(const VECTOR<OTHER>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] -= v[i];
+        }
+        return lhs;
+    }
+
+    /* compound assignment from a another vector of the same type.
+     * These operators can be used for implicit conversion and  handle operations
+     * like "vector *= scalar" by letting the compiler implicitly convert a scalar
+     * to a vector (assuming the BASE<T> allows it).
+     */
+    VECTOR<T>& operator +=(const VECTOR<T>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] += v[i];
+        }
+        return lhs;
+    }
+    VECTOR<T>& operator -=(const VECTOR<T>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] -= v[i];
+        }
+        return lhs;
+    }
+
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+
+    /* The operators below handle operation between vectors of the same size
+     * but of a different element type.
+     */
+    template<typename RT>
+    friend inline constexpr VECTOR<T> PURE operator +(VECTOR<T> lv, const VECTOR<RT>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv += rv;
+    }
+    template<typename RT>
+    friend inline constexpr VECTOR<T> PURE operator -(VECTOR<T> lv, const VECTOR<RT>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv -= rv;
+    }
+
+    /* The operators below (which are not templates once this class is instanced,
+     * i.e.: BASE<T> is known) can be used for implicit conversion on both sides.
+     * These handle operations like "vector + scalar" and "scalar + vector" by
+     * letting the compiler implicitly convert a scalar to a vector (assuming
+     * the BASE<T> allows it).
+     */
+    friend inline constexpr VECTOR<T> PURE operator +(VECTOR<T> lv, const VECTOR<T>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv += rv;
+    }
+    friend inline constexpr VECTOR<T> PURE operator -(VECTOR<T> lv, const VECTOR<T>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv -= rv;
+    }
+};
+
+template<template<typename T> class VECTOR, typename T>
+class TVecProductOperators {
+public:
+    /* compound assignment from a another vector of the same size but different
+     * element type.
+     */
+    template<typename OTHER>
+    VECTOR<T>& operator *=(const VECTOR<OTHER>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] *= v[i];
+        }
+        return lhs;
+    }
+    template<typename OTHER>
+    VECTOR<T>& operator /=(const VECTOR<OTHER>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] /= v[i];
+        }
+        return lhs;
+    }
+
+    /* compound assignment from a another vector of the same type.
+     * These operators can be used for implicit conversion and  handle operations
+     * like "vector *= scalar" by letting the compiler implicitly convert a scalar
+     * to a vector (assuming the BASE<T> allows it).
+     */
+    VECTOR<T>& operator *=(const VECTOR<T>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] *= v[i];
+        }
+        return lhs;
+    }
+    VECTOR<T>& operator /=(const VECTOR<T>& v) {
+        VECTOR<T>& lhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < lhs.size(); i++) {
+            lhs[i] /= v[i];
+        }
+        return lhs;
+    }
+
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+
+    /* The operators below handle operation between vectors of the same size
+     * but of a different element type.
+     */
+    template<typename RT>
+    friend inline constexpr VECTOR<T> PURE operator *(VECTOR<T> lv, const VECTOR<RT>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv *= rv;
+    }
+    template<typename RT>
+    friend inline constexpr VECTOR<T> PURE operator /(VECTOR<T> lv, const VECTOR<RT>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv /= rv;
+    }
+
+    /* The operators below (which are not templates once this class is instanced,
+     * i.e.: BASE<T> is known) can be used for implicit conversion on both sides.
+     * These handle operations like "vector * scalar" and "scalar * vector" by
+     * letting the compiler implicitly convert a scalar to a vector (assuming
+     * the BASE<T> allows it).
+     */
+    friend inline constexpr VECTOR<T> PURE operator *(VECTOR<T> lv, const VECTOR<T>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv *= rv;
+    }
+    friend inline constexpr VECTOR<T> PURE operator /(VECTOR<T> lv, const VECTOR<T>& rv) {
+        // don't pass lv by reference because we need a copy anyways
+        return lv /= rv;
+    }
+};
+
+/*
+ * TVecUnaryOperators implements unary operators on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TVecUnaryOperators<BASE, T> BASE will automatically
+ * get all the functionality here.
+ *
+ * These operators are implemented as friend functions of TVecUnaryOperators<BASE, T>
+ */
+template<template<typename T> class VECTOR, typename T>
+class TVecUnaryOperators {
+public:
+    VECTOR<T>& operator ++() {
+        VECTOR<T>& rhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < rhs.size(); i++) {
+            ++rhs[i];
+        }
+        return rhs;
+    }
+
+    VECTOR<T>& operator --() {
+        VECTOR<T>& rhs = static_cast<VECTOR<T>&>(*this);
+        for (size_t i = 0; i < rhs.size(); i++) {
+            --rhs[i];
+        }
+        return rhs;
+    }
+
+    CONSTEXPR VECTOR<T> operator -() const {
+        VECTOR<T> r(VECTOR<T>::NO_INIT);
+        VECTOR<T> const& rv(static_cast<VECTOR<T> const&>(*this));
+        for (size_t i = 0; i < r.size(); i++) {
+            r[i] = -rv[i];
+        }
+        return r;
+    }
+};
+
+/*
+ * TVecComparisonOperators implements relational/comparison operators
+ * on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TVecComparisonOperators<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+template<template<typename T> class VECTOR, typename T>
+class TVecComparisonOperators {
+public:
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+    template<typename RT>
+    friend inline
+    bool PURE operator ==(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        for (size_t i = 0; i < lv.size(); i++)
+            if (lv[i] != rv[i])
+                return false;
+        return true;
+    }
+
+    template<typename RT>
+    friend inline
+    bool PURE operator !=(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        return !operator ==(lv, rv);
+    }
+
+    template<typename RT>
+    friend inline
+    bool PURE operator >(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        for (size_t i = 0; i < lv.size(); i++) {
+            if (lv[i] == rv[i]) {
+                continue;
+            }
+            return lv[i] > rv[i];
+        }
+        return false;
+    }
+
+    template<typename RT>
+    friend inline
+    constexpr bool PURE operator <=(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        return !(lv > rv);
+    }
+
+    template<typename RT>
+    friend inline
+    bool PURE operator <(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        for (size_t i = 0; i < lv.size(); i++) {
+            if (lv[i] == rv[i]) {
+                continue;
+            }
+            return lv[i] < rv[i];
+        }
+        return false;
+    }
+
+    template<typename RT>
+    friend inline
+    constexpr bool PURE operator >=(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        return !(lv < rv);
+    }
+
+    template<typename RT>
+    friend inline
+    CONSTEXPR VECTOR<bool> PURE equal(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        VECTOR<bool> r;
+        for (size_t i = 0; i < lv.size(); i++) {
+            r[i] = lv[i] == rv[i];
+        }
+        return r;
+    }
+
+    template<typename RT>
+    friend inline
+    CONSTEXPR VECTOR<bool> PURE notEqual(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        VECTOR<bool> r;
+        for (size_t i = 0; i < lv.size(); i++) {
+            r[i] = lv[i] != rv[i];
+        }
+        return r;
+    }
+
+    template<typename RT>
+    friend inline
+    CONSTEXPR VECTOR<bool> PURE lessThan(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        VECTOR<bool> r;
+        for (size_t i = 0; i < lv.size(); i++) {
+            r[i] = lv[i] < rv[i];
+        }
+        return r;
+    }
+
+    template<typename RT>
+    friend inline
+    CONSTEXPR VECTOR<bool> PURE lessThanEqual(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        VECTOR<bool> r;
+        for (size_t i = 0; i < lv.size(); i++) {
+            r[i] = lv[i] <= rv[i];
+        }
+        return r;
+    }
+
+    template<typename RT>
+    friend inline
+    CONSTEXPR VECTOR<bool> PURE greaterThan(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        VECTOR<bool> r;
+        for (size_t i = 0; i < lv.size(); i++) {
+            r[i] = lv[i] > rv[i];
+        }
+        return r;
+    }
+
+    template<typename RT>
+    friend inline
+    CONSTEXPR VECTOR<bool> PURE greaterThanEqual(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        VECTOR<bool> r;
+        for (size_t i = 0; i < lv.size(); i++) {
+            r[i] = lv[i] >= rv[i];
+        }
+        return r;
+    }
+};
+
+/*
+ * TVecFunctions implements functions on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TVecFunctions<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+template<template<typename T> class VECTOR, typename T>
+class TVecFunctions {
+public:
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+    template<typename RT>
+    friend inline CONSTEXPR T PURE dot(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        T r(0);
+        for (size_t i = 0; i < lv.size(); i++) {
+            //r = std::fma(lv[i], rv[i], r);
+            r += lv[i] * rv[i];
+        }
+        return r;
+    }
+
+    friend inline constexpr T PURE norm(const VECTOR<T>& lv) {
+        return std::sqrt(dot(lv, lv));
+    }
+
+    friend inline constexpr T PURE length(const VECTOR<T>& lv) {
+        return norm(lv);
+    }
+
+    friend inline constexpr T PURE norm2(const VECTOR<T>& lv) {
+        return dot(lv, lv);
+    }
+
+    friend inline constexpr T PURE length2(const VECTOR<T>& lv) {
+        return norm2(lv);
+    }
+
+    template<typename RT>
+    friend inline constexpr T PURE distance(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        return length(rv - lv);
+    }
+
+    template<typename RT>
+    friend inline constexpr T PURE distance2(const VECTOR<T>& lv, const VECTOR<RT>& rv) {
+        return length2(rv - lv);
+    }
+
+    friend inline constexpr VECTOR<T> PURE normalize(const VECTOR<T>& lv) {
+        return lv * (T(1) / length(lv));
+    }
+
+    friend inline constexpr VECTOR<T> PURE rcp(VECTOR<T> v) {
+        return T(1) / v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE abs(VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::abs(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE floor(VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::floor(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE ceil(VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::ceil(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE round(VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::round(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE inversesqrt(VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = T(1) / std::sqrt(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE sqrt(VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::sqrt(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE pow(VECTOR<T> v, T p) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::pow(v[i], p);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE saturate(const VECTOR<T>& lv) {
+        return clamp(lv, T(0), T(1));
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE clamp(VECTOR<T> v, T min, T max) {
+        for (size_t i = 0; i< v.size(); i++) {
+            v[i] = std::min(max, std::max(min, v[i]));
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE fma(const VECTOR<T>& lv, const VECTOR<T>& rv, VECTOR<T> a) {
+        for (size_t i = 0; i<lv.size(); i++) {
+            //a[i] = std::fma(lv[i], rv[i], a[i]);
+            a[i] += (lv[i] * rv[i]);
+        }
+        return a;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE min(const VECTOR<T>& u, VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::min(u[i], v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE max(const VECTOR<T>& u, VECTOR<T> v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = std::max(u[i], v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR T PURE max(const VECTOR<T>& v) {
+        T r(std::numeric_limits<T>::lowest());
+        for (size_t i = 0; i < v.size(); i++) {
+            r = std::max(r, v[i]);
+        }
+        return r;
+    }
+
+    friend inline CONSTEXPR T PURE min(const VECTOR<T>& v) {
+        T r(std::numeric_limits<T>::max());
+        for (size_t i = 0; i < v.size(); i++) {
+            r = std::min(r, v[i]);
+        }
+        return r;
+    }
+
+    friend inline CONSTEXPR VECTOR<T> PURE apply(VECTOR<T> v, const std::function<T(T)>& f) {
+        for (size_t i = 0; i < v.size(); i++) {
+            v[i] = f(v[i]);
+        }
+        return v;
+    }
+
+    friend inline CONSTEXPR bool PURE any(const VECTOR<T>& v) {
+        for (size_t i = 0; i < v.size(); i++) {
+            if (v[i] != T(0)) return true;
+        }
+        return false;
+    }
+
+    friend inline CONSTEXPR bool PURE all(const VECTOR<T>& v) {
+        bool result = true;
+        for (size_t i = 0; i < v.size(); i++) {
+            result &= (v[i] != T(0));
+        }
+        return result;
+    }
+
+    template<typename R>
+    friend inline CONSTEXPR VECTOR<R> PURE map(VECTOR<T> v, const std::function<R(T)>& f) {
+        VECTOR<R> result;
+        for (size_t i = 0; i < v.size(); i++) {
+            result[i] = f(v[i]);
+        }
+        return result;
+    }
+};
+
+/*
+ * TVecDebug implements functions on a vector of type BASE<T>.
+ *
+ * BASE only needs to implement operator[] and size().
+ * By simply inheriting from TVecDebug<BASE, T> BASE will automatically
+ * get all the functionality here.
+ */
+template<template<typename T> class VECTOR, typename T>
+class TVecDebug {
+public:
+    /*
+     * NOTE: the functions below ARE NOT member methods. They are friend functions
+     * with they definition inlined with their declaration. This makes these
+     * template functions available to the compiler when (and only when) this class
+     * is instantiated, at which point they're only templated on the 2nd parameter
+     * (the first one, BASE<T> being known).
+     */
+    friend std::ostream& operator<<(std::ostream& stream, const VECTOR<T>& v) {
+        stream << "< ";
+        for (size_t i = 0; i < v.size() - 1; i++) {
+            stream << T(v[i]) << ", ";
+        }
+        stream << T(v[v.size() - 1]) << " >";
+        return stream;
+    }
+};
+
+#undef CONSTEXPR
+#undef PURE
+
+// -------------------------------------------------------------------------------------
+}  // namespace details
+}  // namespace android
diff --git a/libs/math/include/math/half.h b/libs/math/include/math/half.h
new file mode 100644
index 0000000..3ca8bd1
--- /dev/null
+++ b/libs/math/include/math/half.h
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <iosfwd>
+#include <limits>
+#include <type_traits>
+
+#ifdef __cplusplus
+#   define LIKELY( exp )    (__builtin_expect( !!(exp), true ))
+#   define UNLIKELY( exp )  (__builtin_expect( !!(exp), false ))
+#else
+#   define LIKELY( exp )    (__builtin_expect( !!(exp), 1 ))
+#   define UNLIKELY( exp )  (__builtin_expect( !!(exp), 0 ))
+#endif
+
+#if __cplusplus >= 201402L
+#define CONSTEXPR constexpr
+#else
+#define CONSTEXPR
+#endif
+
+namespace android {
+
+/*
+ * half-float
+ *
+ *  1   5       10
+ * +-+------+------------+
+ * |s|eee.ee|mm.mmmm.mmmm|
+ * +-+------+------------+
+ *
+ * minimum (denormal) value: 2^-24 = 5.96e-8
+ * minimum (normal) value:   2^-14 = 6.10e-5
+ * maximum value:            2-2^-10 = 65504
+ *
+ * Integers between 0 and 2048 can be represented exactly
+ */
+class half {
+    struct fp16 {
+        uint16_t bits = 0;
+        fp16() noexcept = default;
+        explicit constexpr fp16(uint16_t b) noexcept : bits(b) { }
+        void setS(unsigned int s) noexcept { bits = uint16_t((bits & 0x7FFF) | (s<<15)); }
+        void setE(unsigned int s) noexcept { bits = uint16_t((bits & 0xE3FF) | (s<<10)); }
+        void setM(unsigned int s) noexcept { bits = uint16_t((bits & 0xFC00) | (s<< 0)); }
+        constexpr unsigned int getS() const noexcept { return  bits >> 15u; }
+        constexpr unsigned int getE() const noexcept { return (bits >> 10u) & 0x1Fu; }
+        constexpr unsigned int getM() const noexcept { return  bits         & 0x3FFu; }
+    };
+    struct fp32 {
+        union {
+            uint32_t bits = 0;
+            float fp;
+        };
+        fp32() noexcept = default;
+        explicit constexpr fp32(float f) : fp(f) { }
+        void setS(unsigned int s) noexcept { bits = uint32_t((bits & 0x7FFFFFFF) | (s<<31)); }
+        void setE(unsigned int s) noexcept { bits = uint32_t((bits & 0x807FFFFF) | (s<<23)); }
+        void setM(unsigned int s) noexcept { bits = uint32_t((bits & 0xFF800000) | (s<< 0)); }
+        constexpr unsigned int getS() const noexcept { return  bits >> 31u; }
+        constexpr unsigned int getE() const noexcept { return (bits >> 23u) & 0xFFu; }
+        constexpr unsigned int getM() const noexcept { return  bits         & 0x7FFFFFu; }
+    };
+
+public:
+    CONSTEXPR half(float v) noexcept : mBits(ftoh(v)) { }
+    CONSTEXPR operator float() const noexcept { return htof(mBits); }
+
+    uint16_t getBits() const noexcept { return mBits.bits; }
+    unsigned int getExponent() const noexcept { return mBits.getE(); }
+    unsigned int getMantissa() const noexcept { return mBits.getM(); }
+
+private:
+    friend class std::numeric_limits<half>;
+    friend CONSTEXPR half operator"" _hf(long double v);
+
+    enum Binary { binary };
+    explicit constexpr half(Binary, uint16_t bits) noexcept : mBits(bits) { }
+    static CONSTEXPR fp16 ftoh(float v) noexcept;
+    static CONSTEXPR float htof(fp16 v) noexcept;
+    fp16 mBits;
+};
+
+inline CONSTEXPR half::fp16 half::ftoh(float v) noexcept {
+    fp16 out;
+    fp32 in(v);
+    if (UNLIKELY(in.getE() == 0xFF)) { // inf or nan
+        out.setE(0x1F);
+        out.setM(in.getM() ? 0x200 : 0);
+    } else {
+        int e = static_cast<int>(in.getE()) - 127 + 15;
+        if (e >= 0x1F) {
+            // overflow
+            out.setE(0x31); // +/- inf
+        } else if (e <= 0) {
+            // underflow
+            // flush to +/- 0
+        } else {
+            unsigned int m = in.getM();
+            out.setE(uint16_t(e));
+            out.setM(m >> 13);
+            if (m & 0x1000) {
+                // rounding
+                out.bits++;
+            }
+        }
+    }
+    out.setS(in.getS());
+    return out;
+}
+
+inline CONSTEXPR float half::htof(half::fp16 in) noexcept {
+    fp32 out;
+    if (UNLIKELY(in.getE() == 0x1F)) { // inf or nan
+        out.setE(0xFF);
+        out.setM(in.getM() ? 0x400000 : 0);
+    } else {
+        if (in.getE() == 0) {
+            if (in.getM()) {
+                // TODO: denormal half float, treat as zero for now
+                // (it's stupid because they can be represented as regular float)
+            }
+        } else {
+            int e = static_cast<int>(in.getE()) - 15 + 127;
+            unsigned int m = in.getM();
+            out.setE(uint32_t(e));
+            out.setM(m << 13);
+        }
+    }
+    out.setS(in.getS());
+    return out.fp;
+}
+
+inline CONSTEXPR android::half operator"" _hf(long double v) {
+    return android::half(android::half::binary, android::half::ftoh(static_cast<float>(v)).bits);
+}
+
+} // namespace android
+
+namespace std {
+
+template<> struct is_floating_point<android::half> : public std::true_type {};
+
+template<>
+class numeric_limits<android::half> {
+public:
+    typedef android::half type;
+
+    static constexpr const bool is_specialized = true;
+    static constexpr const bool is_signed = true;
+    static constexpr const bool is_integer = false;
+    static constexpr const bool is_exact = false;
+    static constexpr const bool has_infinity = true;
+    static constexpr const bool has_quiet_NaN = true;
+    static constexpr const bool has_signaling_NaN = false;
+    static constexpr const float_denorm_style has_denorm = denorm_absent;
+    static constexpr const bool has_denorm_loss = true;
+    static constexpr const bool is_iec559 = false;
+    static constexpr const bool is_bounded = true;
+    static constexpr const bool is_modulo = false;
+    static constexpr const bool traps = false;
+    static constexpr const bool tinyness_before = false;
+    static constexpr const float_round_style round_style = round_indeterminate;
+
+    static constexpr const int digits = 11;
+    static constexpr const int digits10 = 3;
+    static constexpr const int max_digits10 = 5;
+    static constexpr const int radix = 2;
+    static constexpr const int min_exponent = -13;
+    static constexpr const int min_exponent10 = -4;
+    static constexpr const int max_exponent = 16;
+    static constexpr const int max_exponent10 = 4;
+
+    inline static constexpr type round_error() noexcept { return android::half(android::half::binary, 0x3800); }
+    inline static constexpr type min() noexcept { return android::half(android::half::binary, 0x0400); }
+    inline static constexpr type max() noexcept { return android::half(android::half::binary, 0x7bff); }
+    inline static constexpr type lowest() noexcept { return android::half(android::half::binary, 0xfbff); }
+    inline static constexpr type epsilon() noexcept { return android::half(android::half::binary, 0x1400); }
+    inline static constexpr type infinity() noexcept { return android::half(android::half::binary, 0x7c00); }
+    inline static constexpr type quiet_NaN() noexcept { return android::half(android::half::binary, 0x7fff); }
+    inline static constexpr type denorm_min() noexcept { return android::half(android::half::binary, 0x0001); }
+    inline static constexpr type signaling_NaN() noexcept { return android::half(android::half::binary, 0x7dff); }
+};
+
+} // namespace std
+
+#undef LIKELY
+#undef UNLIKELY
+#undef CONSTEXPR
diff --git a/libs/math/include/math/mat2.h b/libs/math/include/math/mat2.h
new file mode 100644
index 0000000..3e6cd4c
--- /dev/null
+++ b/libs/math/include/math/mat2.h
@@ -0,0 +1,377 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/TMatHelpers.h>
+#include <math/vec2.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#define PURE __attribute__((pure))
+
+#if __cplusplus >= 201402L
+#define CONSTEXPR constexpr
+#else
+#define CONSTEXPR
+#endif
+
+namespace android {
+// -------------------------------------------------------------------------------------
+namespace details {
+
+/**
+ * A 2x2 column-major matrix class.
+ *
+ * Conceptually a 2x2 matrix is a an array of 2 column vec2:
+ *
+ * mat2 m =
+ *      \f$
+ *      \left(
+ *      \begin{array}{cc}
+ *      m[0] & m[1] \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *      =
+ *      \f$
+ *      \left(
+ *      \begin{array}{cc}
+ *      m[0][0] & m[1][0] \\
+ *      m[0][1] & m[1][1] \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *      =
+ *      \f$
+ *      \left(
+ *      \begin{array}{cc}
+ *      m(0,0) & m(0,1) \\
+ *      m(1,0) & m(1,1) \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *
+ * m[n] is the \f$ n^{th} \f$ column of the matrix and is a vec2.
+ *
+ */
+template <typename T>
+class TMat22 :  public TVecUnaryOperators<TMat22, T>,
+                public TVecComparisonOperators<TMat22, T>,
+                public TVecAddOperators<TMat22, T>,
+                public TMatProductOperators<TMat22, T>,
+                public TMatSquareFunctions<TMat22, T>,
+                public TMatHelpers<TMat22, T>,
+                public TMatDebug<TMat22, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+    typedef TVec2<T> col_type;
+    typedef TVec2<T> row_type;
+
+    static constexpr size_t COL_SIZE = col_type::SIZE;  // size of a column (i.e.: number of rows)
+    static constexpr size_t ROW_SIZE = row_type::SIZE;  // size of a row (i.e.: number of columns)
+    static constexpr size_t NUM_ROWS = COL_SIZE;
+    static constexpr size_t NUM_COLS = ROW_SIZE;
+
+private:
+    /*
+     *  <--  N columns  -->
+     *
+     *  a[0][0] a[1][0] a[2][0] ... a[N][0]    ^
+     *  a[0][1] a[1][1] a[2][1] ... a[N][1]    |
+     *  a[0][2] a[1][2] a[2][2] ... a[N][2]  M rows
+     *  ...                                    |
+     *  a[0][M] a[1][M] a[2][M] ... a[N][M]    v
+     *
+     *  COL_SIZE = M
+     *  ROW_SIZE = N
+     *  m[0] = [ a[0][0] a[0][1] a[0][2] ... a[0][M] ]
+     */
+
+    col_type m_value[NUM_COLS];
+
+public:
+    // array access
+    inline constexpr col_type const& operator[](size_t column) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(column < NUM_COLS);
+#endif
+        return m_value[column];
+    }
+
+    inline col_type& operator[](size_t column) {
+        assert(column < NUM_COLS);
+        return m_value[column];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TMat22(const TMat22&) = default;
+    ~TMat22() = default;
+    TMat22& operator = (const TMat22&) = default;
+
+    /**
+     *  constructors
+     */
+
+    /**
+     * leaves object uninitialized. use with caution.
+     */
+    explicit constexpr TMat22(no_init)
+            : m_value{ col_type(col_type::NO_INIT),
+                       col_type(col_type::NO_INIT) } {}
+
+
+    /**
+     * initialize to identity.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cc}
+     *      1 & 0 \\
+     *      0 & 1 \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    CONSTEXPR TMat22();
+
+    /**
+     * initialize to Identity*scalar.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cc}
+     *      v & 0 \\
+     *      0 & v \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template<typename U>
+    explicit CONSTEXPR TMat22(U v);
+
+    /**
+     * sets the diagonal to a vector.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cc}
+     *      v[0] & 0 \\
+     *      0 & v[1] \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat22(const TVec2<U>& v);
+
+    /**
+     * construct from another matrix of the same size
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat22(const TMat22<U>& rhs);
+
+    /**
+     * construct from 2 column vectors.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cc}
+     *      v0 & v1 \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <typename A, typename B>
+    CONSTEXPR TMat22(const TVec2<A>& v0, const TVec2<B>& v1);
+
+    /** construct from 4 elements in column-major form.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cc}
+     *      m[0][0] & m[1][0] \\
+     *      m[0][1] & m[1][1] \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <
+        typename A, typename B,
+        typename C, typename D>
+    CONSTEXPR TMat22(A m00, B m01, C m10, D m11);
+
+    /**
+     * construct from a C array in column major form.
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat22(U const* rawArray);
+
+    /**
+     * Rotate by radians in the 2D plane
+     */
+    static CONSTEXPR TMat22<T> rotate(T radian) {
+        TMat22<T> r(TMat22<T>::NO_INIT);
+        T c = std::cos(radian);
+        T s = std::sin(radian);
+        r[0][0] = c;   r[1][1] = c;
+        r[0][1] = s;   r[1][0] = -s;
+        return r;
+    }
+};
+
+// ----------------------------------------------------------------------------------------
+// Constructors
+// ----------------------------------------------------------------------------------------
+
+// Since the matrix code could become pretty big quickly, we don't inline most
+// operations.
+
+template <typename T>
+CONSTEXPR TMat22<T>::TMat22() {
+    m_value[0] = col_type(1, 0);
+    m_value[1] = col_type(0, 1);
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat22<T>::TMat22(U v) {
+    m_value[0] = col_type(v, 0);
+    m_value[1] = col_type(0, v);
+}
+
+template<typename T>
+template<typename U>
+CONSTEXPR TMat22<T>::TMat22(const TVec2<U>& v) {
+    m_value[0] = col_type(v.x, 0);
+    m_value[1] = col_type(0, v.y);
+}
+
+// construct from 4 scalars. Note that the arrangement
+// of values in the constructor is the transpose of the matrix
+// notation.
+template<typename T>
+template <
+    typename A, typename B,
+    typename C, typename D>
+CONSTEXPR TMat22<T>::TMat22( A m00, B m01, C m10, D m11) {
+    m_value[0] = col_type(m00, m01);
+    m_value[1] = col_type(m10, m11);
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat22<T>::TMat22(const TMat22<U>& rhs) {
+    for (size_t col = 0; col < NUM_COLS; ++col) {
+        m_value[col] = col_type(rhs[col]);
+    }
+}
+
+// Construct from 2 column vectors.
+template <typename T>
+template <typename A, typename B>
+CONSTEXPR TMat22<T>::TMat22(const TVec2<A>& v0, const TVec2<B>& v1) {
+    m_value[0] = v0;
+    m_value[1] = v1;
+}
+
+// Construct from raw array, in column-major form.
+template <typename T>
+template <typename U>
+CONSTEXPR TMat22<T>::TMat22(U const* rawArray) {
+    for (size_t col = 0; col < NUM_COLS; ++col) {
+        for (size_t row = 0; row < NUM_ROWS; ++row) {
+            m_value[col][row] = *rawArray++;
+        }
+    }
+}
+
+// ----------------------------------------------------------------------------------------
+// Arithmetic operators outside of class
+// ----------------------------------------------------------------------------------------
+
+/* We use non-friend functions here to prevent the compiler from using
+ * implicit conversions, for instance of a scalar to a vector. The result would
+ * not be what the caller expects.
+ *
+ * Also note that the order of the arguments in the inner loop is important since
+ * it determines the output type (only relevant when T != U).
+ */
+
+// matrix * column-vector, result is a vector of the same type than the input vector
+template <typename T, typename U>
+CONSTEXPR typename TMat22<U>::col_type PURE operator *(const TMat22<T>& lhs, const TVec2<U>& rhs) {
+    // Result is initialized to zero.
+    typename TMat22<U>::col_type result;
+    for (size_t col = 0; col < TMat22<T>::NUM_COLS; ++col) {
+        result += lhs[col] * rhs[col];
+    }
+    return result;
+}
+
+// row-vector * matrix, result is a vector of the same type than the input vector
+template <typename T, typename U>
+CONSTEXPR typename TMat22<U>::row_type PURE operator *(const TVec2<U>& lhs, const TMat22<T>& rhs) {
+    typename TMat22<U>::row_type result(TMat22<U>::row_type::NO_INIT);
+    for (size_t col = 0; col < TMat22<T>::NUM_COLS; ++col) {
+        result[col] = dot(lhs, rhs[col]);
+    }
+    return result;
+}
+
+// matrix * scalar, result is a matrix of the same type than the input matrix
+template<typename T, typename U>
+constexpr typename std::enable_if<std::is_arithmetic<U>::value, TMat22<T>>::type PURE
+operator*(TMat22<T> lhs, U rhs) {
+    return lhs *= rhs;
+}
+
+// scalar * matrix, result is a matrix of the same type than the input matrix
+template<typename T, typename U>
+constexpr typename std::enable_if<std::is_arithmetic<U>::value, TMat22<T>>::type PURE
+operator*(U lhs, const TMat22<T>& rhs) {
+    return rhs * lhs;
+}
+
+// ----------------------------------------------------------------------------------------
+
+/* FIXME: this should go into TMatSquareFunctions<> but for some reason
+ * BASE<T>::col_type is not accessible from there (???)
+ */
+template<typename T>
+CONSTEXPR typename TMat22<T>::col_type PURE diag(const TMat22<T>& m) {
+    return matrix::diag(m);
+}
+
+}  // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TMat22<double> mat2d;
+typedef details::TMat22<float> mat2;
+typedef details::TMat22<float> mat2f;
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#undef PURE
+#undef CONSTEXPR
diff --git a/libs/math/include/math/mat3.h b/libs/math/include/math/mat3.h
new file mode 100644
index 0000000..5c8a9b2
--- /dev/null
+++ b/libs/math/include/math/mat3.h
@@ -0,0 +1,440 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/quat.h>
+#include <math/TMatHelpers.h>
+#include <math/vec3.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#define PURE __attribute__((pure))
+
+#if __cplusplus >= 201402L
+#define CONSTEXPR constexpr
+#else
+#define CONSTEXPR
+#endif
+
+namespace android {
+// -------------------------------------------------------------------------------------
+namespace details {
+
+template<typename T>
+class TQuaternion;
+
+/**
+ * A 3x3 column-major matrix class.
+ *
+ * Conceptually a 3x3 matrix is a an array of 3 column vec3:
+ *
+ * mat3 m =
+ *      \f$
+ *      \left(
+ *      \begin{array}{ccc}
+ *      m[0] & m[1] & m[2] \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *      =
+ *      \f$
+ *      \left(
+ *      \begin{array}{ccc}
+ *      m[0][0] & m[1][0] & m[2][0] \\
+ *      m[0][1] & m[1][1] & m[2][1] \\
+ *      m[0][2] & m[1][2] & m[2][2] \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *      =
+ *      \f$
+ *      \left(
+ *      \begin{array}{ccc}
+ *      m(0,0) & m(0,1) & m(0,2) \\
+ *      m(1,0) & m(1,1) & m(1,2) \\
+ *      m(2,0) & m(2,1) & m(2,2) \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *
+ * m[n] is the \f$ n^{th} \f$ column of the matrix and is a vec3.
+ *
+ */
+template <typename T>
+class TMat33 :  public TVecUnaryOperators<TMat33, T>,
+                public TVecComparisonOperators<TMat33, T>,
+                public TVecAddOperators<TMat33, T>,
+                public TMatProductOperators<TMat33, T>,
+                public TMatSquareFunctions<TMat33, T>,
+                public TMatTransform<TMat33, T>,
+                public TMatHelpers<TMat33, T>,
+                public TMatDebug<TMat33, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+    typedef TVec3<T> col_type;
+    typedef TVec3<T> row_type;
+
+    static constexpr size_t COL_SIZE = col_type::SIZE;  // size of a column (i.e.: number of rows)
+    static constexpr size_t ROW_SIZE = row_type::SIZE;  // size of a row (i.e.: number of columns)
+    static constexpr size_t NUM_ROWS = COL_SIZE;
+    static constexpr size_t NUM_COLS = ROW_SIZE;
+
+private:
+    /*
+     *  <--  N columns  -->
+     *
+     *  a[0][0] a[1][0] a[2][0] ... a[N][0]    ^
+     *  a[0][1] a[1][1] a[2][1] ... a[N][1]    |
+     *  a[0][2] a[1][2] a[2][2] ... a[N][2]  M rows
+     *  ...                                    |
+     *  a[0][M] a[1][M] a[2][M] ... a[N][M]    v
+     *
+     *  COL_SIZE = M
+     *  ROW_SIZE = N
+     *  m[0] = [ a[0][0] a[0][1] a[0][2] ... a[0][M] ]
+     */
+
+    col_type m_value[NUM_COLS];
+
+public:
+    // array access
+    inline constexpr col_type const& operator[](size_t column) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(column < NUM_COLS);
+#endif
+        return m_value[column];
+    }
+
+    inline col_type& operator[](size_t column) {
+        assert(column < NUM_COLS);
+        return m_value[column];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TMat33(const TMat33&) = default;
+    ~TMat33() = default;
+    TMat33& operator = (const TMat33&) = default;
+
+    /**
+     *  constructors
+     */
+
+    /**
+     * leaves object uninitialized. use with caution.
+     */
+    explicit constexpr TMat33(no_init)
+            : m_value{ col_type(col_type::NO_INIT),
+                       col_type(col_type::NO_INIT),
+                       col_type(col_type::NO_INIT) } {}
+
+
+    /**
+     * initialize to identity.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{ccc}
+     *      1 & 0 & 0 \\
+     *      0 & 1 & 0 \\
+     *      0 & 0 & 1 \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    CONSTEXPR TMat33();
+
+    /**
+     * initialize to Identity*scalar.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{ccc}
+     *      v & 0 & 0 \\
+     *      0 & v & 0 \\
+     *      0 & 0 & v \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template<typename U>
+    explicit CONSTEXPR TMat33(U v);
+
+    /**
+     * sets the diagonal to a vector.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{ccc}
+     *      v[0] & 0 & 0 \\
+     *      0 & v[1] & 0 \\
+     *      0 & 0 & v[2] \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat33(const TVec3<U>& v);
+
+    /**
+     * construct from another matrix of the same size
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat33(const TMat33<U>& rhs);
+
+    /**
+     * construct from 3 column vectors.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{ccc}
+     *      v0 & v1 & v2 \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <typename A, typename B, typename C>
+    CONSTEXPR TMat33(const TVec3<A>& v0, const TVec3<B>& v1, const TVec3<C>& v2);
+
+    /** construct from 9 elements in column-major form.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{ccc}
+     *      m[0][0] & m[1][0] & m[2][0] \\
+     *      m[0][1] & m[1][1] & m[2][1] \\
+     *      m[0][2] & m[1][2] & m[2][2] \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <
+        typename A, typename B, typename C,
+        typename D, typename E, typename F,
+        typename G, typename H, typename I>
+    CONSTEXPR TMat33(
+           A m00, B m01, C m02,
+           D m10, E m11, F m12,
+           G m20, H m21, I m22);
+
+    /**
+     * construct from a quaternion
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat33(const TQuaternion<U>& q);
+
+    /**
+     * construct from a C array in column major form.
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat33(U const* rawArray);
+
+    /**
+     * orthogonalize only works on matrices of size 3x3
+     */
+    friend inline
+    CONSTEXPR TMat33 orthogonalize(const TMat33& m) {
+        TMat33 ret(TMat33::NO_INIT);
+        ret[0] = normalize(m[0]);
+        ret[2] = normalize(cross(ret[0], m[1]));
+        ret[1] = normalize(cross(ret[2], ret[0]));
+        return ret;
+    }
+};
+
+// ----------------------------------------------------------------------------------------
+// Constructors
+// ----------------------------------------------------------------------------------------
+
+// Since the matrix code could become pretty big quickly, we don't inline most
+// operations.
+
+template <typename T>
+CONSTEXPR TMat33<T>::TMat33() {
+    m_value[0] = col_type(1, 0, 0);
+    m_value[1] = col_type(0, 1, 0);
+    m_value[2] = col_type(0, 0, 1);
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat33<T>::TMat33(U v) {
+    m_value[0] = col_type(v, 0, 0);
+    m_value[1] = col_type(0, v, 0);
+    m_value[2] = col_type(0, 0, v);
+}
+
+template<typename T>
+template<typename U>
+CONSTEXPR TMat33<T>::TMat33(const TVec3<U>& v) {
+    m_value[0] = col_type(v.x, 0, 0);
+    m_value[1] = col_type(0, v.y, 0);
+    m_value[2] = col_type(0, 0, v.z);
+}
+
+// construct from 9 scalars. Note that the arrangement
+// of values in the constructor is the transpose of the matrix
+// notation.
+template<typename T>
+template <
+    typename A, typename B, typename C,
+    typename D, typename E, typename F,
+    typename G, typename H, typename I>
+CONSTEXPR TMat33<T>::TMat33(
+        A m00, B m01, C m02,
+        D m10, E m11, F m12,
+        G m20, H m21, I m22) {
+    m_value[0] = col_type(m00, m01, m02);
+    m_value[1] = col_type(m10, m11, m12);
+    m_value[2] = col_type(m20, m21, m22);
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat33<T>::TMat33(const TMat33<U>& rhs) {
+    for (size_t col = 0; col < NUM_COLS; ++col) {
+        m_value[col] = col_type(rhs[col]);
+    }
+}
+
+// Construct from 3 column vectors.
+template <typename T>
+template <typename A, typename B, typename C>
+CONSTEXPR TMat33<T>::TMat33(const TVec3<A>& v0, const TVec3<B>& v1, const TVec3<C>& v2) {
+    m_value[0] = v0;
+    m_value[1] = v1;
+    m_value[2] = v2;
+}
+
+// Construct from raw array, in column-major form.
+template <typename T>
+template <typename U>
+CONSTEXPR TMat33<T>::TMat33(U const* rawArray) {
+    for (size_t col = 0; col < NUM_COLS; ++col) {
+        for (size_t row = 0; row < NUM_ROWS; ++row) {
+            m_value[col][row] = *rawArray++;
+        }
+    }
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat33<T>::TMat33(const TQuaternion<U>& q) {
+    const U n = q.x*q.x + q.y*q.y + q.z*q.z + q.w*q.w;
+    const U s = n > 0 ? 2/n : 0;
+    const U x = s*q.x;
+    const U y = s*q.y;
+    const U z = s*q.z;
+    const U xx = x*q.x;
+    const U xy = x*q.y;
+    const U xz = x*q.z;
+    const U xw = x*q.w;
+    const U yy = y*q.y;
+    const U yz = y*q.z;
+    const U yw = y*q.w;
+    const U zz = z*q.z;
+    const U zw = z*q.w;
+    m_value[0] = col_type(1-yy-zz,    xy+zw,    xz-yw);  // NOLINT
+    m_value[1] = col_type(  xy-zw,  1-xx-zz,    yz+xw);  // NOLINT
+    m_value[2] = col_type(  xz+yw,    yz-xw,  1-xx-yy);  // NOLINT
+}
+
+// ----------------------------------------------------------------------------------------
+// Arithmetic operators outside of class
+// ----------------------------------------------------------------------------------------
+
+/* We use non-friend functions here to prevent the compiler from using
+ * implicit conversions, for instance of a scalar to a vector. The result would
+ * not be what the caller expects.
+ *
+ * Also note that the order of the arguments in the inner loop is important since
+ * it determines the output type (only relevant when T != U).
+ */
+
+// matrix * column-vector, result is a vector of the same type than the input vector
+template <typename T, typename U>
+CONSTEXPR typename TMat33<U>::col_type PURE operator *(const TMat33<T>& lhs, const TVec3<U>& rhs) {
+    // Result is initialized to zero.
+    typename TMat33<U>::col_type result;
+    for (size_t col = 0; col < TMat33<T>::NUM_COLS; ++col) {
+        result += lhs[col] * rhs[col];
+    }
+    return result;
+}
+
+// row-vector * matrix, result is a vector of the same type than the input vector
+template <typename T, typename U>
+CONSTEXPR typename TMat33<U>::row_type PURE operator *(const TVec3<U>& lhs, const TMat33<T>& rhs) {
+    typename TMat33<U>::row_type result(TMat33<U>::row_type::NO_INIT);
+    for (size_t col = 0; col < TMat33<T>::NUM_COLS; ++col) {
+        result[col] = dot(lhs, rhs[col]);
+    }
+    return result;
+}
+
+// matrix * scalar, result is a matrix of the same type than the input matrix
+template<typename T, typename U>
+constexpr typename std::enable_if<std::is_arithmetic<U>::value, TMat33<T>>::type PURE
+operator*(TMat33<T> lhs, U rhs) {
+    return lhs *= rhs;
+}
+
+// scalar * matrix, result is a matrix of the same type than the input matrix
+template<typename T, typename U>
+constexpr typename std::enable_if<std::is_arithmetic<U>::value, TMat33<T>>::type PURE
+operator*(U lhs, const TMat33<T>& rhs) {
+    return rhs * lhs;
+}
+
+//------------------------------------------------------------------------------
+template <typename T>
+CONSTEXPR TMat33<T> orthogonalize(const TMat33<T>& m) {
+    TMat33<T> ret(TMat33<T>::NO_INIT);
+    ret[0] = normalize(m[0]);
+    ret[2] = normalize(cross(ret[0], m[1]));
+    ret[1] = normalize(cross(ret[2], ret[0]));
+    return ret;
+}
+
+// ----------------------------------------------------------------------------------------
+
+/* FIXME: this should go into TMatSquareFunctions<> but for some reason
+ * BASE<T>::col_type is not accessible from there (???)
+ */
+template<typename T>
+CONSTEXPR typename TMat33<T>::col_type PURE diag(const TMat33<T>& m) {
+    return matrix::diag(m);
+}
+
+}  // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TMat33<double> mat3d;
+typedef details::TMat33<float> mat3;
+typedef details::TMat33<float> mat3f;
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#undef PURE
+#undef CONSTEXPR
diff --git a/libs/math/include/math/mat4.h b/libs/math/include/math/mat4.h
new file mode 100644
index 0000000..6119ba7
--- /dev/null
+++ b/libs/math/include/math/mat4.h
@@ -0,0 +1,586 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/mat3.h>
+#include <math/quat.h>
+#include <math/TMatHelpers.h>
+#include <math/vec3.h>
+#include <math/vec4.h>
+
+#include <stdint.h>
+#include <sys/types.h>
+#include <limits>
+
+#define PURE __attribute__((pure))
+
+#if __cplusplus >= 201402L
+#define CONSTEXPR constexpr
+#else
+#define CONSTEXPR
+#endif
+
+namespace android {
+// -------------------------------------------------------------------------------------
+namespace details {
+
+template<typename T>
+class TQuaternion;
+
+/**
+ * A 4x4 column-major matrix class.
+ *
+ * Conceptually a 4x4 matrix is a an array of 4 column double4:
+ *
+ * mat4 m =
+ *      \f$
+ *      \left(
+ *      \begin{array}{cccc}
+ *      m[0] & m[1] & m[2] & m[3] \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *      =
+ *      \f$
+ *      \left(
+ *      \begin{array}{cccc}
+ *      m[0][0] & m[1][0] & m[2][0] & m[3][0] \\
+ *      m[0][1] & m[1][1] & m[2][1] & m[3][1] \\
+ *      m[0][2] & m[1][2] & m[2][2] & m[3][2] \\
+ *      m[0][3] & m[1][3] & m[2][3] & m[3][3] \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *      =
+ *      \f$
+ *      \left(
+ *      \begin{array}{cccc}
+ *      m(0,0) & m(0,1) & m(0,2) & m(0,3) \\
+ *      m(1,0) & m(1,1) & m(1,2) & m(1,3) \\
+ *      m(2,0) & m(2,1) & m(2,2) & m(2,3) \\
+ *      m(3,0) & m(3,1) & m(3,2) & m(3,3) \\
+ *      \end{array}
+ *      \right)
+ *      \f$
+ *
+ * m[n] is the \f$ n^{th} \f$ column of the matrix and is a double4.
+ *
+ */
+template <typename T>
+class TMat44 :  public TVecUnaryOperators<TMat44, T>,
+                public TVecComparisonOperators<TMat44, T>,
+                public TVecAddOperators<TMat44, T>,
+                public TMatProductOperators<TMat44, T>,
+                public TMatSquareFunctions<TMat44, T>,
+                public TMatTransform<TMat44, T>,
+                public TMatHelpers<TMat44, T>,
+                public TMatDebug<TMat44, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+    typedef TVec4<T> col_type;
+    typedef TVec4<T> row_type;
+
+    static constexpr size_t COL_SIZE = col_type::SIZE;  // size of a column (i.e.: number of rows)
+    static constexpr size_t ROW_SIZE = row_type::SIZE;  // size of a row (i.e.: number of columns)
+    static constexpr size_t NUM_ROWS = COL_SIZE;
+    static constexpr size_t NUM_COLS = ROW_SIZE;
+
+private:
+    /*
+     *  <--  N columns  -->
+     *
+     *  a[0][0] a[1][0] a[2][0] ... a[N][0]    ^
+     *  a[0][1] a[1][1] a[2][1] ... a[N][1]    |
+     *  a[0][2] a[1][2] a[2][2] ... a[N][2]  M rows
+     *  ...                                    |
+     *  a[0][M] a[1][M] a[2][M] ... a[N][M]    v
+     *
+     *  COL_SIZE = M
+     *  ROW_SIZE = N
+     *  m[0] = [ a[0][0] a[0][1] a[0][2] ... a[0][M] ]
+     */
+
+    col_type m_value[NUM_COLS];
+
+public:
+    // array access
+    inline constexpr col_type const& operator[](size_t column) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(column < NUM_COLS);
+#endif
+        return m_value[column];
+    }
+
+    inline col_type& operator[](size_t column) {
+        assert(column < NUM_COLS);
+        return m_value[column];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TMat44(const TMat44&) = default;
+    ~TMat44() = default;
+    TMat44& operator = (const TMat44&) = default;
+
+    /*
+     *  constructors
+     */
+
+    // leaves object uninitialized. use with caution.
+    explicit constexpr TMat44(no_init)
+            : m_value{ col_type(col_type::NO_INIT),
+                       col_type(col_type::NO_INIT),
+                       col_type(col_type::NO_INIT),
+                       col_type(col_type::NO_INIT) } {}
+
+    /** initialize to identity.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cccc}
+     *      1 & 0 & 0 & 0 \\
+     *      0 & 1 & 0 & 0 \\
+     *      0 & 0 & 1 & 0 \\
+     *      0 & 0 & 0 & 1 \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    CONSTEXPR TMat44();
+
+    /** initialize to Identity*scalar.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cccc}
+     *      v & 0 & 0 & 0 \\
+     *      0 & v & 0 & 0 \\
+     *      0 & 0 & v & 0 \\
+     *      0 & 0 & 0 & v \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template<typename U>
+    explicit CONSTEXPR TMat44(U v);
+
+    /** sets the diagonal to a vector.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cccc}
+     *      v[0] & 0 & 0 & 0 \\
+     *      0 & v[1] & 0 & 0 \\
+     *      0 & 0 & v[2] & 0 \\
+     *      0 & 0 & 0 & v[3] \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat44(const TVec4<U>& v);
+
+    // construct from another matrix of the same size
+    template <typename U>
+    explicit CONSTEXPR TMat44(const TMat44<U>& rhs);
+
+    /** construct from 4 column vectors.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cccc}
+     *      v0 & v1 & v2 & v3 \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <typename A, typename B, typename C, typename D>
+    CONSTEXPR TMat44(const TVec4<A>& v0, const TVec4<B>& v1, const TVec4<C>& v2, const TVec4<D>& v3);
+
+    /** construct from 16 elements in column-major form.
+     *
+     *      \f$
+     *      \left(
+     *      \begin{array}{cccc}
+     *      m[0][0] & m[1][0] & m[2][0] & m[3][0] \\
+     *      m[0][1] & m[1][1] & m[2][1] & m[3][1] \\
+     *      m[0][2] & m[1][2] & m[2][2] & m[3][2] \\
+     *      m[0][3] & m[1][3] & m[2][3] & m[3][3] \\
+     *      \end{array}
+     *      \right)
+     *      \f$
+     */
+    template <
+        typename A, typename B, typename C, typename D,
+        typename E, typename F, typename G, typename H,
+        typename I, typename J, typename K, typename L,
+        typename M, typename N, typename O, typename P>
+    CONSTEXPR TMat44(
+            A m00, B m01, C m02, D m03,
+            E m10, F m11, G m12, H m13,
+            I m20, J m21, K m22, L m23,
+            M m30, N m31, O m32, P m33);
+
+    /**
+     * construct from a quaternion
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat44(const TQuaternion<U>& q);
+
+    /**
+     * construct from a C array in column major form.
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat44(U const* rawArray);
+
+    /**
+     * construct from a 3x3 matrix
+     */
+    template <typename U>
+    explicit CONSTEXPR TMat44(const TMat33<U>& matrix);
+
+    /**
+     * construct from a 3x3 matrix and 3d translation
+     */
+    template <typename U, typename V>
+    CONSTEXPR TMat44(const TMat33<U>& matrix, const TVec3<V>& translation);
+
+    /**
+     * construct from a 3x3 matrix and 4d last column.
+     */
+    template <typename U, typename V>
+    CONSTEXPR TMat44(const TMat33<U>& matrix, const TVec4<V>& column3);
+
+    /*
+     *  helpers
+     */
+
+    static CONSTEXPR TMat44 ortho(T left, T right, T bottom, T top, T near, T far);
+
+    static CONSTEXPR TMat44 frustum(T left, T right, T bottom, T top, T near, T far);
+
+    enum class Fov {
+        HORIZONTAL,
+        VERTICAL
+    };
+    static CONSTEXPR TMat44 perspective(T fov, T aspect, T near, T far, Fov direction = Fov::VERTICAL);
+
+    template <typename A, typename B, typename C>
+    static CONSTEXPR TMat44 lookAt(const TVec3<A>& eye, const TVec3<B>& center, const TVec3<C>& up);
+
+    template <typename A>
+    static CONSTEXPR TVec3<A> project(const TMat44& projectionMatrix, TVec3<A> vertice) {
+        TVec4<A> r = projectionMatrix * TVec4<A>{ vertice, 1 };
+        return r.xyz / r.w;
+    }
+
+    template <typename A>
+    static CONSTEXPR TVec4<A> project(const TMat44& projectionMatrix, TVec4<A> vertice) {
+        vertice = projectionMatrix * vertice;
+        return { vertice.xyz / vertice.w, 1 };
+    }
+
+    /**
+     * Constructs a 3x3 matrix from the upper-left corner of this 4x4 matrix
+     */
+    inline constexpr TMat33<T> upperLeft() const {
+        return TMat33<T>(m_value[0].xyz, m_value[1].xyz, m_value[2].xyz);
+    }
+};
+
+// ----------------------------------------------------------------------------------------
+// Constructors
+// ----------------------------------------------------------------------------------------
+
+// Since the matrix code could become pretty big quickly, we don't inline most
+// operations.
+
+template <typename T>
+CONSTEXPR TMat44<T>::TMat44() {
+    m_value[0] = col_type(1, 0, 0, 0);
+    m_value[1] = col_type(0, 1, 0, 0);
+    m_value[2] = col_type(0, 0, 1, 0);
+    m_value[3] = col_type(0, 0, 0, 1);
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat44<T>::TMat44(U v) {
+    m_value[0] = col_type(v, 0, 0, 0);
+    m_value[1] = col_type(0, v, 0, 0);
+    m_value[2] = col_type(0, 0, v, 0);
+    m_value[3] = col_type(0, 0, 0, v);
+}
+
+template<typename T>
+template<typename U>
+CONSTEXPR TMat44<T>::TMat44(const TVec4<U>& v) {
+    m_value[0] = col_type(v.x, 0, 0, 0);
+    m_value[1] = col_type(0, v.y, 0, 0);
+    m_value[2] = col_type(0, 0, v.z, 0);
+    m_value[3] = col_type(0, 0, 0, v.w);
+}
+
+// construct from 16 scalars
+template<typename T>
+template <
+    typename A, typename B, typename C, typename D,
+    typename E, typename F, typename G, typename H,
+    typename I, typename J, typename K, typename L,
+    typename M, typename N, typename O, typename P>
+CONSTEXPR TMat44<T>::TMat44(
+        A m00, B m01, C m02, D m03,
+        E m10, F m11, G m12, H m13,
+        I m20, J m21, K m22, L m23,
+        M m30, N m31, O m32, P m33) {
+    m_value[0] = col_type(m00, m01, m02, m03);
+    m_value[1] = col_type(m10, m11, m12, m13);
+    m_value[2] = col_type(m20, m21, m22, m23);
+    m_value[3] = col_type(m30, m31, m32, m33);
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat44<T>::TMat44(const TMat44<U>& rhs) {
+    for (size_t col = 0; col < NUM_COLS; ++col) {
+        m_value[col] = col_type(rhs[col]);
+    }
+}
+
+// Construct from 4 column vectors.
+template <typename T>
+template <typename A, typename B, typename C, typename D>
+CONSTEXPR TMat44<T>::TMat44(
+        const TVec4<A>& v0, const TVec4<B>& v1,
+        const TVec4<C>& v2, const TVec4<D>& v3) {
+    m_value[0] = col_type(v0);
+    m_value[1] = col_type(v1);
+    m_value[2] = col_type(v2);
+    m_value[3] = col_type(v3);
+}
+
+// Construct from raw array, in column-major form.
+template <typename T>
+template <typename U>
+CONSTEXPR TMat44<T>::TMat44(U const* rawArray) {
+    for (size_t col = 0; col < NUM_COLS; ++col) {
+        for (size_t row = 0; row < NUM_ROWS; ++row) {
+            m_value[col][row] = *rawArray++;
+        }
+    }
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat44<T>::TMat44(const TQuaternion<U>& q) {
+    const U n = q.x*q.x + q.y*q.y + q.z*q.z + q.w*q.w;
+    const U s = n > 0 ? 2/n : 0;
+    const U x = s*q.x;
+    const U y = s*q.y;
+    const U z = s*q.z;
+    const U xx = x*q.x;
+    const U xy = x*q.y;
+    const U xz = x*q.z;
+    const U xw = x*q.w;
+    const U yy = y*q.y;
+    const U yz = y*q.z;
+    const U yw = y*q.w;
+    const U zz = z*q.z;
+    const U zw = z*q.w;
+    m_value[0] = col_type(1-yy-zz,    xy+zw,    xz-yw,   0);
+    m_value[1] = col_type(  xy-zw,  1-xx-zz,    yz+xw,   0);  // NOLINT
+    m_value[2] = col_type(  xz+yw,    yz-xw,  1-xx-yy,   0);  // NOLINT
+    m_value[3] = col_type(      0,        0,        0,   1);  // NOLINT
+}
+
+template <typename T>
+template <typename U>
+CONSTEXPR TMat44<T>::TMat44(const TMat33<U>& m) {
+    m_value[0] = col_type(m[0][0], m[0][1], m[0][2], 0);
+    m_value[1] = col_type(m[1][0], m[1][1], m[1][2], 0);
+    m_value[2] = col_type(m[2][0], m[2][1], m[2][2], 0);
+    m_value[3] = col_type(      0,       0,       0, 1);  // NOLINT
+}
+
+template <typename T>
+template <typename U, typename V>
+CONSTEXPR TMat44<T>::TMat44(const TMat33<U>& m, const TVec3<V>& v) {
+    m_value[0] = col_type(m[0][0], m[0][1], m[0][2], 0);
+    m_value[1] = col_type(m[1][0], m[1][1], m[1][2], 0);
+    m_value[2] = col_type(m[2][0], m[2][1], m[2][2], 0);
+    m_value[3] = col_type(   v[0],    v[1],    v[2], 1);  // NOLINT
+}
+
+template <typename T>
+template <typename U, typename V>
+CONSTEXPR TMat44<T>::TMat44(const TMat33<U>& m, const TVec4<V>& v) {
+    m_value[0] = col_type(m[0][0], m[0][1], m[0][2],    0);  // NOLINT
+    m_value[1] = col_type(m[1][0], m[1][1], m[1][2],    0);  // NOLINT
+    m_value[2] = col_type(m[2][0], m[2][1], m[2][2],    0);  // NOLINT
+    m_value[3] = col_type(   v[0],    v[1],    v[2], v[3]);  // NOLINT
+}
+
+// ----------------------------------------------------------------------------------------
+// Helpers
+// ----------------------------------------------------------------------------------------
+
+template <typename T>
+CONSTEXPR TMat44<T> TMat44<T>::ortho(T left, T right, T bottom, T top, T near, T far) {
+    TMat44<T> m;
+    m[0][0] =  2 / (right - left);
+    m[1][1] =  2 / (top   - bottom);
+    m[2][2] = -2 / (far   - near);
+    m[3][0] = -(right + left)   / (right - left);
+    m[3][1] = -(top   + bottom) / (top   - bottom);
+    m[3][2] = -(far   + near)   / (far   - near);
+    return m;
+}
+
+template <typename T>
+CONSTEXPR TMat44<T> TMat44<T>::frustum(T left, T right, T bottom, T top, T near, T far) {
+    TMat44<T> m;
+    m[0][0] =  (2 * near) / (right - left);
+    m[1][1] =  (2 * near) / (top   - bottom);
+    m[2][0] =  (right + left)   / (right - left);
+    m[2][1] =  (top   + bottom) / (top   - bottom);
+    m[2][2] = -(far   + near)   / (far   - near);
+    m[2][3] = -1;
+    m[3][2] = -(2 * far * near) / (far   - near);
+    m[3][3] =  0;
+    return m;
+}
+
+template <typename T>
+CONSTEXPR TMat44<T> TMat44<T>::perspective(T fov, T aspect, T near, T far, TMat44::Fov direction) {
+    T h;
+    T w;
+
+    if (direction == TMat44::Fov::VERTICAL) {
+        h = std::tan(fov * M_PI / 360.0f) * near;
+        w = h * aspect;
+    } else {
+        w = std::tan(fov * M_PI / 360.0f) * near;
+        h = w / aspect;
+    }
+    return frustum(-w, w, -h, h, near, far);
+}
+
+/*
+ * Returns a matrix representing the pose of a virtual camera looking towards -Z in its
+ * local Y-up coordinate system. "eye" is where the camera is located, "center" is the points its
+ * looking at and "up" defines where the Y axis of the camera's local coordinate system is.
+ */
+template <typename T>
+template <typename A, typename B, typename C>
+CONSTEXPR TMat44<T> TMat44<T>::lookAt(const TVec3<A>& eye, const TVec3<B>& center, const TVec3<C>& up) {
+    TVec3<T> z_axis(normalize(center - eye));
+    TVec3<T> norm_up(normalize(up));
+    if (std::abs(dot(z_axis, norm_up)) > 0.999) {
+        // Fix up vector if we're degenerate (looking straight up, basically)
+        norm_up = { norm_up.z, norm_up.x, norm_up.y };
+    }
+    TVec3<T> x_axis(normalize(cross(z_axis, norm_up)));
+    TVec3<T> y_axis(cross(x_axis, z_axis));
+    return TMat44<T>(
+            TVec4<T>(x_axis, 0),
+            TVec4<T>(y_axis, 0),
+            TVec4<T>(-z_axis, 0),
+            TVec4<T>(eye, 1));
+}
+
+// ----------------------------------------------------------------------------------------
+// Arithmetic operators outside of class
+// ----------------------------------------------------------------------------------------
+
+/* We use non-friend functions here to prevent the compiler from using
+ * implicit conversions, for instance of a scalar to a vector. The result would
+ * not be what the caller expects.
+ *
+ * Also note that the order of the arguments in the inner loop is important since
+ * it determines the output type (only relevant when T != U).
+ */
+
+// matrix * column-vector, result is a vector of the same type than the input vector
+template <typename T, typename U>
+CONSTEXPR typename TMat44<T>::col_type PURE operator *(const TMat44<T>& lhs, const TVec4<U>& rhs) {
+    // Result is initialized to zero.
+    typename TMat44<T>::col_type result;
+    for (size_t col = 0; col < TMat44<T>::NUM_COLS; ++col) {
+        result += lhs[col] * rhs[col];
+    }
+    return result;
+}
+
+// mat44 * vec3, result is vec3( mat44 * {vec3, 1} )
+template <typename T, typename U>
+CONSTEXPR typename TMat44<T>::col_type PURE operator *(const TMat44<T>& lhs, const TVec3<U>& rhs) {
+    return lhs * TVec4<U>{ rhs, 1 };
+}
+
+
+// row-vector * matrix, result is a vector of the same type than the input vector
+template <typename T, typename U>
+CONSTEXPR typename TMat44<U>::row_type PURE operator *(const TVec4<U>& lhs, const TMat44<T>& rhs) {
+    typename TMat44<U>::row_type result(TMat44<U>::row_type::NO_INIT);
+    for (size_t col = 0; col < TMat44<T>::NUM_COLS; ++col) {
+        result[col] = dot(lhs, rhs[col]);
+    }
+    return result;
+}
+
+// matrix * scalar, result is a matrix of the same type than the input matrix
+template <typename T, typename U>
+constexpr typename std::enable_if<std::is_arithmetic<U>::value, TMat44<T>>::type PURE
+operator *(TMat44<T> lhs, U rhs) {
+    return lhs *= rhs;
+}
+
+// scalar * matrix, result is a matrix of the same type than the input matrix
+template <typename T, typename U>
+constexpr typename std::enable_if<std::is_arithmetic<U>::value, TMat44<T>>::type PURE
+operator *(U lhs, const TMat44<T>& rhs) {
+    return rhs * lhs;
+}
+
+// ----------------------------------------------------------------------------------------
+
+/* FIXME: this should go into TMatSquareFunctions<> but for some reason
+ * BASE<T>::col_type is not accessible from there (???)
+ */
+template<typename T>
+typename TMat44<T>::col_type PURE diag(const TMat44<T>& m) {
+    return matrix::diag(m);
+}
+
+} // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TMat44<double> mat4d;
+typedef details::TMat44<float> mat4;
+typedef details::TMat44<float> mat4f;
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#undef PURE
+#undef CONSTEXPR
diff --git a/libs/math/include/math/quat.h b/libs/math/include/math/quat.h
new file mode 100644
index 0000000..1936a2b
--- /dev/null
+++ b/libs/math/include/math/quat.h
@@ -0,0 +1,192 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/half.h>
+#include <math/TQuatHelpers.h>
+#include <math/vec3.h>
+#include <math/vec4.h>
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#ifndef PURE
+#define PURE __attribute__((pure))
+#endif
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgnu-anonymous-struct"
+#pragma clang diagnostic ignored "-Wnested-anon-types"
+
+namespace android {
+// -------------------------------------------------------------------------------------
+
+namespace details {
+
+template <typename T>
+class TQuaternion : public TVecAddOperators<TQuaternion, T>,
+                    public TVecUnaryOperators<TQuaternion, T>,
+                    public TVecComparisonOperators<TQuaternion, T>,
+                    public TQuatProductOperators<TQuaternion, T>,
+                    public TQuatFunctions<TQuaternion, T>,
+                    public TQuatDebug<TQuaternion, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+
+    /*
+     * quaternion internals stored as:
+     *
+     * q = w + xi + yj + zk
+     *
+     *  q[0] = x;
+     *  q[1] = y;
+     *  q[2] = z;
+     *  q[3] = w;
+     *
+     */
+    union {
+        struct { T x, y, z, w; };
+        TVec4<T> xyzw;
+        TVec3<T> xyz;
+        TVec2<T> xy;
+    };
+
+    enum { SIZE = 4 };
+    inline constexpr static size_type size() { return SIZE; }
+
+    // array access
+    inline constexpr T const& operator[](size_t i) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(i < SIZE);
+#endif
+        return (&x)[i];
+    }
+
+    inline T& operator[](size_t i) {
+        assert(i < SIZE);
+        return (&x)[i];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TQuaternion(const TQuaternion&) = default;
+    ~TQuaternion() = default;
+    TQuaternion& operator = (const TQuaternion&) = default;
+
+    // constructors
+
+    // leaves object uninitialized. use with caution.
+    explicit
+    constexpr TQuaternion(no_init) : xyzw(TVec4<T>::NO_INIT) {}
+
+    // default constructor. sets all values to zero.
+    constexpr TQuaternion() : x(0), y(0), z(0), w(0) { }
+
+    // handles implicit conversion to a tvec4. must not be explicit.
+    template<typename A>
+    constexpr TQuaternion(A w) : x(0), y(0), z(0), w(w) {
+        static_assert(std::is_arithmetic<A>::value, "requires arithmetic type");
+    }
+
+    // initialize from 4 values to w + xi + yj + zk
+    template<typename A, typename B, typename C, typename D>
+    constexpr TQuaternion(A w, B x, C y, D z) : x(x), y(y), z(z), w(w) { }
+
+    // initialize from a vec3 + a value to : v.xi + v.yj + v.zk + w
+    template<typename A, typename B>
+    constexpr TQuaternion(const TVec3<A>& v, B w) : x(v.x), y(v.y), z(v.z), w(w) { }
+
+    // initialize from a double4
+    template<typename A>
+    constexpr explicit TQuaternion(const TVec4<A>& v) : x(v.x), y(v.y), z(v.z), w(v.w) { }
+
+    // initialize from a quaternion of a different type
+    template<typename A>
+    constexpr explicit TQuaternion(const TQuaternion<A>& v) : x(v.x), y(v.y), z(v.z), w(v.w) { }
+
+    // conjugate operator
+    constexpr TQuaternion operator~() const {
+        return conj(*this);
+    }
+
+    // constructs a quaternion from an axis and angle
+    template <typename A, typename B>
+    constexpr static TQuaternion PURE fromAxisAngle(const TVec3<A>& axis, B angle) {
+        return TQuaternion(std::sin(angle*0.5) * normalize(axis), std::cos(angle*0.5));
+    }
+};
+
+}  // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TQuaternion<double> quatd;
+typedef details::TQuaternion<float> quat;
+typedef details::TQuaternion<float> quatf;
+typedef details::TQuaternion<half> quath;
+
+constexpr inline quat operator"" _i(long double v) {
+    return quat(0, static_cast<float>(v), 0, 0);
+}
+constexpr inline quat operator"" _j(long double v) {
+    return quat(0, 0, static_cast<float>(v), 0);
+}
+constexpr inline quat operator"" _k(long double v) {
+    return quat(0, 0, 0, static_cast<float>(v));
+}
+
+constexpr inline quat operator"" _i(unsigned long long v) {  // NOLINT
+    return quat(0, static_cast<float>(v), 0, 0);
+}
+constexpr inline quat operator"" _j(unsigned long long v) {  // NOLINT
+    return quat(0, 0, static_cast<float>(v), 0);
+}
+constexpr inline quat operator"" _k(unsigned long long v) {  // NOLINT
+    return quat(0, 0, 0, static_cast<float>(v));
+}
+
+constexpr inline quatd operator"" _id(long double v) {
+    return quatd(0, static_cast<double>(v), 0, 0);
+}
+constexpr inline quatd operator"" _jd(long double v) {
+    return quatd(0, 0, static_cast<double>(v), 0);
+}
+constexpr inline quatd operator"" _kd(long double v) {
+    return quatd(0, 0, 0, static_cast<double>(v));
+}
+
+constexpr inline quatd operator"" _id(unsigned long long v) {  // NOLINT
+    return quatd(0, static_cast<double>(v), 0, 0);
+}
+constexpr inline quatd operator"" _jd(unsigned long long v) {  // NOLINT
+    return quatd(0, 0, static_cast<double>(v), 0);
+}
+constexpr inline quatd operator"" _kd(unsigned long long v) {  // NOLINT
+    return quatd(0, 0, 0, static_cast<double>(v));
+}
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#pragma clang diagnostic pop
+
+#undef PURE
diff --git a/libs/math/include/math/scalar.h b/libs/math/include/math/scalar.h
new file mode 100644
index 0000000..2eced92
--- /dev/null
+++ b/libs/math/include/math/scalar.h
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <algorithm>
+#include <cmath>
+
+namespace android {
+
+template<typename T>
+static constexpr T saturate(T v) noexcept {
+    return T(std::min(T(1), std::max(T(0), v)));
+}
+
+template<typename T>
+static constexpr T clamp(T v, T min, T max) noexcept {
+    return T(std::min(max, std::max(min, v)));
+}
+
+template<typename T>
+static constexpr T mix(T x, T y, T a) noexcept {
+    return x * (T(1) - a) + y * a;
+}
+
+template<typename T>
+static constexpr T lerp(T x, T y, T a) noexcept {
+    return mix(x, y, a);
+}
+
+} // namespace std
diff --git a/libs/math/include/math/vec2.h b/libs/math/include/math/vec2.h
new file mode 100644
index 0000000..a347633
--- /dev/null
+++ b/libs/math/include/math/vec2.h
@@ -0,0 +1,125 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/TVecHelpers.h>
+#include <math/half.h>
+#include <assert.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <type_traits>
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgnu-anonymous-struct"
+#pragma clang diagnostic ignored "-Wnested-anon-types"
+
+namespace android {
+// -------------------------------------------------------------------------------------
+
+namespace details {
+
+template <typename T>
+class TVec2 :   public TVecProductOperators<TVec2, T>,
+                public TVecAddOperators<TVec2, T>,
+                public TVecUnaryOperators<TVec2, T>,
+                public TVecComparisonOperators<TVec2, T>,
+                public TVecFunctions<TVec2, T>,
+                public TVecDebug<TVec2, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+
+    union {
+        struct { T x, y; };
+        struct { T s, t; };
+        struct { T r, g; };
+    };
+
+    static constexpr size_t SIZE = 2;
+    inline constexpr size_type size() const { return SIZE; }
+
+    // array access
+    inline constexpr T const& operator[](size_t i) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(i < SIZE);
+#endif
+        return (&x)[i];
+    }
+
+    inline T& operator[](size_t i) {
+        assert(i < SIZE);
+        return (&x)[i];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TVec2(const TVec2&) = default;
+    ~TVec2() = default;
+    TVec2& operator = (const TVec2&) = default;
+
+    // constructors
+
+    // leaves object uninitialized. use with caution.
+    explicit
+    constexpr TVec2(no_init) { }
+
+    // default constructor
+    constexpr TVec2() : x(0), y(0) { }
+
+    // handles implicit conversion to a tvec4. must not be explicit.
+    template<typename A, typename = typename std::enable_if<std::is_arithmetic<A>::value >::type>
+    constexpr TVec2(A v) : x(v), y(v) { }
+
+    template<typename A, typename B>
+    constexpr TVec2(A x, B y) : x(x), y(y) { }
+
+    template<typename A>
+    explicit
+    constexpr TVec2(const TVec2<A>& v) : x(v.x), y(v.y) { }
+
+    // cross product works only on vectors of size 2 or 3
+    template<typename RT>
+    friend inline
+    constexpr value_type cross(const TVec2& u, const TVec2<RT>& v) {
+        return value_type(u.x*v.y - u.y*v.x);
+    }
+};
+
+}  // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TVec2<double> double2;
+typedef details::TVec2<float> float2;
+typedef details::TVec2<float> vec2;
+typedef details::TVec2<half> half2;
+typedef details::TVec2<int32_t> int2;
+typedef details::TVec2<uint32_t> uint2;
+typedef details::TVec2<int16_t> short2;
+typedef details::TVec2<uint16_t> ushort2;
+typedef details::TVec2<int8_t> byte2;
+typedef details::TVec2<uint8_t> ubyte2;
+typedef details::TVec2<bool> bool2;
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#pragma clang diagnostic pop
diff --git a/libs/math/include/math/vec3.h b/libs/math/include/math/vec3.h
new file mode 100644
index 0000000..009fd84
--- /dev/null
+++ b/libs/math/include/math/vec3.h
@@ -0,0 +1,131 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/vec2.h>
+#include <math/half.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgnu-anonymous-struct"
+#pragma clang diagnostic ignored "-Wnested-anon-types"
+
+namespace android {
+// -------------------------------------------------------------------------------------
+
+namespace details {
+
+template <typename T>
+class TVec3 :   public TVecProductOperators<TVec3, T>,
+                public TVecAddOperators<TVec3, T>,
+                public TVecUnaryOperators<TVec3, T>,
+                public TVecComparisonOperators<TVec3, T>,
+                public TVecFunctions<TVec3, T>,
+                public TVecDebug<TVec3, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+
+    union {
+        struct { T x, y, z; };
+        struct { T s, t, p; };
+        struct { T r, g, b; };
+        TVec2<T> xy;
+        TVec2<T> st;
+        TVec2<T> rg;
+    };
+
+    static constexpr size_t SIZE = 3;
+    inline constexpr size_type size() const { return SIZE; }
+
+    // array access
+    inline constexpr T const& operator[](size_t i) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(i < SIZE);
+#endif
+        return (&x)[i];
+    }
+
+    inline T& operator[](size_t i) {
+        assert(i < SIZE);
+        return (&x)[i];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TVec3(const TVec3&) = default;
+    ~TVec3() = default;
+    TVec3& operator = (const TVec3&) = default;
+
+    // constructors
+    // leaves object uninitialized. use with caution.
+    explicit
+    constexpr TVec3(no_init) { }
+
+    // default constructor
+    constexpr TVec3() : x(0), y(0), z(0) { }
+
+    // handles implicit conversion to a tvec4. must not be explicit.
+    template<typename A, typename = typename std::enable_if<std::is_arithmetic<A>::value >::type>
+    constexpr TVec3(A v) : x(v), y(v), z(v) { }
+
+    template<typename A, typename B, typename C>
+    constexpr TVec3(A x, B y, C z) : x(x), y(y), z(z) { }
+
+    template<typename A, typename B>
+    constexpr TVec3(const TVec2<A>& v, B z) : x(v.x), y(v.y), z(z) { }
+
+    template<typename A>
+    explicit
+    constexpr TVec3(const TVec3<A>& v) : x(v.x), y(v.y), z(v.z) { }
+
+    // cross product works only on vectors of size 3
+    template <typename RT>
+    friend inline
+    constexpr TVec3 cross(const TVec3& u, const TVec3<RT>& v) {
+        return TVec3(
+                u.y*v.z - u.z*v.y,
+                u.z*v.x - u.x*v.z,
+                u.x*v.y - u.y*v.x);
+    }
+};
+
+}  // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TVec3<double> double3;
+typedef details::TVec3<float> float3;
+typedef details::TVec3<float> vec3;
+typedef details::TVec3<half> half3;
+typedef details::TVec3<int32_t> int3;
+typedef details::TVec3<uint32_t> uint3;
+typedef details::TVec3<int16_t> short3;
+typedef details::TVec3<uint16_t> ushort3;
+typedef details::TVec3<int8_t> byte3;
+typedef details::TVec3<uint8_t> ubyte3;
+typedef details::TVec3<bool> bool3;
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#pragma clang diagnostic pop
diff --git a/libs/math/include/math/vec4.h b/libs/math/include/math/vec4.h
new file mode 100644
index 0000000..1e279fe
--- /dev/null
+++ b/libs/math/include/math/vec4.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <math/vec3.h>
+#include <math/half.h>
+#include <stdint.h>
+#include <sys/types.h>
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wgnu-anonymous-struct"
+#pragma clang diagnostic ignored "-Wnested-anon-types"
+
+namespace android {
+// -------------------------------------------------------------------------------------
+
+namespace details {
+
+template <typename T>
+class  TVec4 :  public TVecProductOperators<TVec4, T>,
+                public TVecAddOperators<TVec4, T>,
+                public TVecUnaryOperators<TVec4, T>,
+                public TVecComparisonOperators<TVec4, T>,
+                public TVecFunctions<TVec4, T>,
+                public TVecDebug<TVec4, T> {
+public:
+    enum no_init { NO_INIT };
+    typedef T value_type;
+    typedef T& reference;
+    typedef T const& const_reference;
+    typedef size_t size_type;
+
+    union {
+        struct { T x, y, z, w; };
+        struct { T s, t, p, q; };
+        struct { T r, g, b, a; };
+        TVec2<T> xy;
+        TVec2<T> st;
+        TVec2<T> rg;
+        TVec3<T> xyz;
+        TVec3<T> stp;
+        TVec3<T> rgb;
+    };
+
+    static constexpr size_t SIZE = 4;
+    inline constexpr size_type size() const { return SIZE; }
+
+    // array access
+    inline constexpr T const& operator[](size_t i) const {
+#if __cplusplus >= 201402L
+        // only possible in C++0x14 with constexpr
+        assert(i < SIZE);
+#endif
+        return (&x)[i];
+    }
+
+    inline T& operator[](size_t i) {
+        assert(i < SIZE);
+        return (&x)[i];
+    }
+
+    // -----------------------------------------------------------------------
+    // we want the compiler generated versions for these...
+    TVec4(const TVec4&) = default;
+    ~TVec4() = default;
+    TVec4& operator = (const TVec4&) = default;
+
+    // constructors
+
+    // leaves object uninitialized. use with caution.
+    explicit
+    constexpr TVec4(no_init) { }
+
+    // default constructor
+    constexpr TVec4() : x(0), y(0), z(0), w(0) { }
+
+    // handles implicit conversion to a tvec4. must not be explicit.
+    template<typename A, typename = typename std::enable_if<std::is_arithmetic<A>::value >::type>
+    constexpr TVec4(A v) : x(v), y(v), z(v), w(v) { }
+
+    template<typename A, typename B, typename C, typename D>
+    constexpr TVec4(A x, B y, C z, D w) : x(x), y(y), z(z), w(w) { }
+
+    template<typename A, typename B, typename C>
+    constexpr TVec4(const TVec2<A>& v, B z, C w) : x(v.x), y(v.y), z(z), w(w) { }
+
+    template<typename A, typename B>
+    constexpr TVec4(const TVec3<A>& v, B w) : x(v.x), y(v.y), z(v.z), w(w) { }
+
+    template<typename A>
+    explicit
+    constexpr TVec4(const TVec4<A>& v) : x(v.x), y(v.y), z(v.z), w(v.w) { }
+};
+
+}  // namespace details
+
+// ----------------------------------------------------------------------------------------
+
+typedef details::TVec4<double> double4;
+typedef details::TVec4<float> float4;
+typedef details::TVec4<float> vec4;
+typedef details::TVec4<half> half4;
+typedef details::TVec4<int32_t> int4;
+typedef details::TVec4<uint32_t> uint4;
+typedef details::TVec4<int16_t> short4;
+typedef details::TVec4<uint16_t> ushort4;
+typedef details::TVec4<int8_t> byte4;
+typedef details::TVec4<uint8_t> ubyte4;
+typedef details::TVec4<bool> bool4;
+
+// ----------------------------------------------------------------------------------------
+}  // namespace android
+
+#pragma clang diagnostic pop
diff --git a/libs/math/tests/Android.bp b/libs/math/tests/Android.bp
new file mode 100644
index 0000000..0ed24a2
--- /dev/null
+++ b/libs/math/tests/Android.bp
@@ -0,0 +1,39 @@
+//
+// Copyright (C) 2014 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+cc_test {
+    name: "vec_test",
+    srcs: ["vec_test.cpp"],
+    static_libs: ["libmath"],
+}
+
+cc_test {
+    name: "mat_test",
+    srcs: ["mat_test.cpp"],
+    static_libs: ["libmath"],
+}
+
+cc_test {
+    name: "half_test",
+    srcs: ["half_test.cpp"],
+    static_libs: ["libmath"],
+}
+
+cc_test {
+    name: "quat_test",
+    srcs: ["quat_test.cpp"],
+    static_libs: ["libmath"],
+}
diff --git a/libs/ui/tests/half_test.cpp b/libs/math/tests/half_test.cpp
similarity index 98%
rename from libs/ui/tests/half_test.cpp
rename to libs/math/tests/half_test.cpp
index b2a5e5c..496a7ef 100644
--- a/libs/ui/tests/half_test.cpp
+++ b/libs/math/tests/half_test.cpp
@@ -19,8 +19,8 @@
 #include <math.h>
 #include <stdlib.h>
 
-#include <ui/half.h>
-#include <ui/vec4.h>
+#include <math/half.h>
+#include <math/vec4.h>
 
 #include <gtest/gtest.h>
 
diff --git a/libs/ui/tests/mat_test.cpp b/libs/math/tests/mat_test.cpp
similarity index 99%
rename from libs/ui/tests/mat_test.cpp
rename to libs/math/tests/mat_test.cpp
index 0f8e631..c365366 100644
--- a/libs/ui/tests/mat_test.cpp
+++ b/libs/math/tests/mat_test.cpp
@@ -24,8 +24,8 @@
 
 #include <gtest/gtest.h>
 
-#include <ui/mat2.h>
-#include <ui/mat4.h>
+#include <math/mat2.h>
+#include <math/mat4.h>
 
 namespace android {
 
diff --git a/libs/ui/tests/quat_test.cpp b/libs/math/tests/quat_test.cpp
similarity index 98%
rename from libs/ui/tests/quat_test.cpp
rename to libs/math/tests/quat_test.cpp
index f5cb659..c20771e 100644
--- a/libs/ui/tests/quat_test.cpp
+++ b/libs/math/tests/quat_test.cpp
@@ -22,10 +22,10 @@
 #include <random>
 #include <functional>
 
-#include <ui/quat.h>
-#include <ui/mat4.h>
-#include <ui/vec3.h>
-#include <ui/vec4.h>
+#include <math/quat.h>
+#include <math/mat4.h>
+#include <math/vec3.h>
+#include <math/vec4.h>
 
 #include <gtest/gtest.h>
 
diff --git a/libs/ui/tests/vec_test.cpp b/libs/math/tests/vec_test.cpp
similarity index 99%
rename from libs/ui/tests/vec_test.cpp
rename to libs/math/tests/vec_test.cpp
index 7c749a7..79ae2e4 100644
--- a/libs/ui/tests/vec_test.cpp
+++ b/libs/math/tests/vec_test.cpp
@@ -19,7 +19,7 @@
 #include <math.h>
 #include <stdlib.h>
 
-#include <ui/vec4.h>
+#include <math/vec4.h>
 
 #include <gtest/gtest.h>
 
diff --git a/libs/ui/Android.bp b/libs/ui/Android.bp
index ea18644..d1bfa18 100644
--- a/libs/ui/Android.bp
+++ b/libs/ui/Android.bp
@@ -78,9 +78,13 @@
 
     static_libs: [
         "libarect",
+        "libmath",
     ],
 
-    export_static_lib_headers: ["libarect"],
+    export_static_lib_headers: [
+        "libarect",
+        "libmath",
+    ],
 }
 
 subdirs = ["tests"]
diff --git a/libs/ui/tests/Android.bp b/libs/ui/tests/Android.bp
index c4f34d5..6733505 100644
--- a/libs/ui/tests/Android.bp
+++ b/libs/ui/tests/Android.bp
@@ -21,26 +21,6 @@
 }
 
 cc_test {
-    name: "vec_test",
-    srcs: ["vec_test.cpp"],
-}
-
-cc_test {
-    name: "mat_test",
-    srcs: ["mat_test.cpp"],
-}
-
-cc_test {
-    name: "half_test",
-    srcs: ["half_test.cpp"],
-}
-
-cc_test {
-    name: "quat_test",
-    srcs: ["quat_test.cpp"],
-}
-
-cc_test {
     name: "colorspace_test",
     shared_libs: ["libui"],
     srcs: ["colorspace_test.cpp"],
