merge from cooder

paddle/cuda/include/hl_matrix_type.cuh

@@ -19,7 +19,6 @@ limitations under the License. */
 #include "hl_base.h"
 
 #ifdef __CUDA_ARCH__
-// typedef void*  vecType;
 #include <vector_types.h>
 #ifndef PADDLE_TYPE_DOUBLE
 typedef float4 vecType;
@@ -37,4 +36,10 @@ typedef __m128d vecType;
 #endif
 #endif
 
-#endif /* HL_MATRIX_TYPE_CUH_ */
+#ifdef __CUDA_ARCH__
+#define INLINE   __device__ inline
+#else
+#define INLINE   inline
+#endif
+
+#endif  // HL_MATRIX_TYPE_CUH_

paddle/cuda/include/hl_tensor_ops.h

+/**
+ * hl_tensor_ops.h
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-06
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ *
+ */
+
+#ifndef HL_TENSOR_OPS_H_
+#define HL_TENSOR_OPS_H_
+
+#include <cmath>
+#include "hl_matrix_type.cuh"
+
+namespace hppl {
+namespace unary {
+
+template<class T>
+class add_scale{
+private:
+  const T p;
+public:
+  INLINE add_scale(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return a + p; }
+};
+
+template<class T>
+class sub_scale {
+private:
+  const T p;
+public:
+  INLINE sub_scale(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return a - p; }
+};
+
+template<class T>
+class mul_scale {
+private:
+  const T p;
+public:
+  INLINE mul_scale(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return a * p; }
+};
+
+template<class T>
+class div_scale {
+private:
+  const T p;
+public:
+  INLINE div_scale(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return a / p; }
+};
+
+template<class T>
+class neg {
+public:
+  INLINE T operator()(const T a) const { return -a; }
+};
+
+template<class T>
+class exp_op {
+public:
+  INLINE T operator()(const T a) const { return std::exp(a); }
+};
+
+template<class T>
+class log_op {
+public:
+  INLINE T operator()(const T a) const { return std::log(a); }
+};
+
+template<class T>
+class sqrt_op {
+public:
+  INLINE T operator()(const T a) const { return std::sqrt(a); }
+};
+
+template<class T>
+class square {
+public:
+  INLINE T operator()(const T a) const { return a * a; }
+};
+
+template<class T>
+class reciprocal {
+public:
+  INLINE T operator()(const T a) const { return T(1) / a; }
+};
+
+template<class T>
+class abs {
+public:
+  INLINE T operator()(const T a) const { return a > 0 ? a : -a; }
+};
+
+template<class T>
+class sign {
+public:
+  INLINE T operator()(const T a) const { return (a > 0) - (a < 0); }
+};
+
+template<class T>
+class min {
+private:
+  const T p;
+public:
+  INLINE min(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return a > p ? p : a; }
+};
+
+template<class T>
+class max {
+private:
+  const T p;
+public:
+  INLINE max(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return a < p ? p : a; }
+};
+
+template<class T>
+class pow_op {
+private:
+  const T p;
+public:
+  INLINE pow_op(const T s) : p(s) {}
+  INLINE T operator()(const T a) const { return std::pow(a, p); }
+};
+
+template<class T>
+class constant {
+private:
+  const T p;
+public:
+  INLINE constant(const T s) : p(s) {}
+  INLINE T operator()(int i) const { return p; }
+  INLINE T operator()(int i, int j) const { return p; }
+};
+
+template<class T>
+class cmp_eq {
+private:
+  const T p;
+public:
+  INLINE cmp_eq(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a == p; }
+};
+
+template<class T>
+class cmp_ne {
+private:
+  const T p;
+public:
+  INLINE cmp_ne(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a != p; }
+};
+
+template<class T>
+class cmp_le {
+private:
+  const T p;
+public:
+  INLINE cmp_le(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a <= p; }
+};
+
+template<class T>
+class cmp_lt {
+private:
+  const T p;
+public:
+  INLINE cmp_lt(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a < p; }
+};
+
+template<class T>
+class cmp_ge {
+private:
+  const T p;
+public:
+  INLINE cmp_ge(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a >= p; }
+};
+
+template<class T>
+class cmp_gt {
+private:
+  const T p;
+public:
+  INLINE cmp_gt(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a > p; }
+};
+
+template<class T>
+class and_op {
+private:
+  const T p;
+public:
+  INLINE and_op(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a && p; }
+};
+
+template<class T>
+class or_op {
+private:
+  const T p;
+public:
+  INLINE or_op(const T s) : p(s) {}
+  INLINE bool operator()(const T a) const { return a || p; }
+};
+
+}  // namespace unary
+
+namespace binary {
+template<class T>
+class add {
+public:
+  INLINE T operator()(const T a, const T b) const { return a + b; }
+};
+
+template<class T>
+class add_scale {
+private:
+  const T p1;
+  const T p2;
+public:
+  INLINE add_scale(const T s1, const T s2) : p1(s1), p2(s2) {}
+  INLINE T operator()(const T a, const T b) const {
+     return p1 * a + p2 * b;
+  }
+};
+
+template<class T>
+class sub {
+public:
+  INLINE T operator()(const T a, const T b) const { return a - b; }
+};
+
+template<class T>
+class mul {
+public:
+  INLINE T operator()(const T a, const T b) const { return a * b; }
+};
+
+template<class T>
+class div {
+public:
+  INLINE T operator()(const T a, const T b) const  { return a / b; }
+};
+
+template<class T>
+class cmp_eq {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a == b; }
+};
+
+template<class T>
+class cmp_ne {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a != b; }
+};
+
+template<class T>
+class cmp_le {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a <= b; }
+};
+
+template<class T>
+class cmp_lt {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a < b; }
+};
+
+template<class T>
+class cmp_ge {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a >= b; }
+};
+
+template<class T>
+class cmp_gt {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a > b; }
+};
+
+template<class T>
+class and_op {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a && b; }
+};
+
+template<class T>
+class or_op {
+public:
+  INLINE bool operator()(const T a, const T b) const { return a || b; }
+};
+
+template<class T>
+class min {
+public:
+  INLINE T operator()(const T a, const T b) const { return a > b ? b : a; }
+};
+
+template<class T>
+class max {
+public:
+  INLINE T operator()(const T a, const T b) const { return a < b ? b : a; }
+};
+
+}  // namespace binary
+}  // namespace hppl
+
+#endif  // HL_TENSOR_OPS_H_
+

paddle/gserver/activations/ActivationFunction.cpp

@@ -271,7 +271,7 @@ void forward(Argument& act) {
                          /* trans */ false, useGpu(act.deviceId));
 
   act.in->copyFrom(*act.value);
-  act.value->abs(*act.value);
+  act.value->abs2(*act.value);
 }
 
 void backward(Argument& act) { act.grad->absDerivative(*act.in); }
@@ -290,7 +290,7 @@ void forward(Argument& act) {
                          /* trans */ false, useGpu(act.deviceId));
 
   act.in->copyFrom(*act.value);
-  act.value->square(*act.value);
+  act.value->square2(*act.value);
 }
 
 void backward(Argument& act) { act.grad->squareDerivative(*act.in); }
@@ -302,7 +302,7 @@ END_DEFINE_ACTIVATION(square)
  * \f]
  */
 BEGIN_DEFINE_ACTIVATION(exponential)
-void forward(Argument& act) { act.value->exp(*act.value); }
+void forward(Argument& act) { act.value->exp2(*act.value); }
 
 void backward(Argument& act) { act.grad->expDerivative(*act.value); }
 END_DEFINE_ACTIVATION(exponential)

paddle/gserver/layers/BatchNormalizationLayer.cpp

@@ -41,7 +41,7 @@ void BatchNormalizationLayer::calMeanAndStd(const MatrixPtr& mat) {
   savedMean_->mulScalar(1.0 / numSamples);  // E[x]
 
   tmpMat_->assign(*mat);
-  tmpMat_->square();
+  tmpMat_->square2();
   savedInvVar_->zeroMem();
   savedInvVar_->accumulateColSum(*tmpMat_);
   savedInvVar_->mulScalar(1.0 / numSamples);  // E[x^2]
@@ -55,7 +55,7 @@ void BatchNormalizationLayer::calMeanAndStd(const MatrixPtr& mat) {
   calMovingMeanAndVar();
 
   savedInvVar_->subScalar(-EPS);
-  savedInvVar_->sqrt(*savedInvVar_);
+  savedInvVar_->sqrt2(*savedInvVar_);
 }
 
 void BatchNormalizationLayer::calMovingMeanAndVar() {
@@ -86,7 +86,7 @@ void BatchNormalizationLayer::setMeanAndStd() {
   savedInvVar_->downClip(real(0.0));
 
   savedInvVar_->subScalar(-EPS);
-  savedInvVar_->sqrt(*savedInvVar_);
+  savedInvVar_->sqrt2(*savedInvVar_);
 }
 
 void BatchNormalizationLayer::expandMat(const MatrixPtr& in, MatrixPtr& out) {

paddle/gserver/layers/CostLayer.cpp

@@ -114,12 +114,12 @@ void MultiClassCrossEntropyWithSelfNorm::forwardImp(Matrix& output,
                                                     Matrix& target) {
   Matrix::resizeOrCreate(sftMaxSum_, output.getHeight(), 1, false, useGpu_);
   output.rowSum(*sftMaxSum_);
-  sftMaxSum_->log();
+  sftMaxSum_->log2();
 
   target.oneHotCrossEntropy(output, *label.ids);
   target.add(*sftMaxSum_);
 
-  sftMaxSum_->square();
+  sftMaxSum_->square2();
   target.add(*sftMaxSum_, config_.softmax_selfnorm_alpha());
 }
 
@@ -130,12 +130,12 @@ void MultiClassCrossEntropyWithSelfNorm::backwardImp(Matrix& output,
   output.rowSum(*sftMaxSum_);
 
   Matrix::resizeOrCreate(sumInv_, output.getHeight(), 1, false, useGpu_);
-  sftMaxSum_->reciprocal(*sumInv_);
+  sftMaxSum_->reciprocal2(*sumInv_);
 
   outputG.oneHotCrossEntropyBp(output, *label.ids);
   outputG.addColumnVector(*sumInv_);
 
-  sftMaxSum_->log();
+  sftMaxSum_->log2();
   sumInv_->dotMul(*sumInv_, *sftMaxSum_);
   sumInv_->mulScalar(2 * config_.softmax_selfnorm_alpha());
 

paddle/gserver/layers/Layer.cpp

@@ -310,12 +310,12 @@ void Layer::showOutputStats() {
     auto tmpMat = dynamic_cast<CpuSparseMatrix*>(outSquare.get());
     min = tmpMat->getMin();
     max = tmpMat->getMax();
-    tmpMat->square();
+    tmpMat->square2();
     LOG(INFO) << "show statistics of [none zero values] in sparse matrix";
   } else {
     min = outSquare->getMin();
     max = outSquare->getMax();
-    outSquare->square();
+    outSquare->square2();
   }
   real std = (outSquare->getSum() / outSquare->getElementCnt()) - mean * mean;
   std = std > 0 ? std : 0;

paddle/gserver/layers/LinearChainCRF.cpp

@@ -61,7 +61,7 @@ real LinearChainCRF::forward(real* x, int* s, int length) {
   expX_->assign(*matX);
   // subtract max to avoid overflow or underflow
   expX_->mul(maxX_, ones_, (real)-1, (real)1);
-  expX_->exp();
+  expX_->exp2();
 
   real* a = a_->getData();
   real* b = b_->getData();
@@ -70,7 +70,7 @@ real LinearChainCRF::forward(real* x, int* s, int length) {
   real* expX = expX_->getData();
   real* maxX = maxX_->getData();
 
-  expW_->exp(*w_);
+  expW_->exp2(*w_);
   real* expW = expW_->getData();
 
   for (int i = 0; i < numClasses_; ++i) {

paddle/gserver/layers/PowerLayer.cpp

@@ -100,7 +100,7 @@ void PowerLayer::backward(const UpdateCallback& callback) {
     Matrix::resizeOrCreate(tmpMtx, batchSize, dataDim, false, useGpu_);
 
     if (inG0) {
-      tmpMtx->log(*inV1);
+      tmpMtx->log2(*inV1);
       tmpMtx->dotMul(*tmpMtx, *outV);
 
       // inG0 += outG .* (log(inV1) * outV)

paddle/math/BaseMatrix.cu

@@ -355,11 +355,11 @@ void BaseMatrixT<T>::neg() { applyUnary(unary::Neg<T>()); }
 
 DEFINE_MATRIX_UNARY_OP(Exp, a = exp(a));
 template<>
-void BaseMatrixT<real>::exp() { applyUnary(unary::Exp<real>()); }
+void BaseMatrixT<real>::exp2() { applyUnary(unary::Exp<real>()); }
 
 DEFINE_MATRIX_UNARY_OP(Log, a = log(a));
 template<>
-void BaseMatrixT<real>::log() {
+void BaseMatrixT<real>::log2() {
   if (useGpu_) {
     applyUnary(unary::Log<real>());
   } else {
@@ -369,23 +369,23 @@ void BaseMatrixT<real>::log() {
 
 DEFINE_MATRIX_UNARY_OP(Sqrt, a = sqrt(a));
 template<>
-void BaseMatrixT<real>::sqrt() { applyUnary(unary::Sqrt<real>()); }
+void BaseMatrixT<real>::sqrt2() { applyUnary(unary::Sqrt<real>()); }
 
 DEFINE_MATRIX_UNARY_OP(Square, a = a * a);
 template<class T>
-void BaseMatrixT<T>::square() { applyUnary(unary::Square<T>()); }
+void BaseMatrixT<T>::square2() { applyUnary(unary::Square<T>()); }
 
 DEFINE_MATRIX_UNARY_OP(Reciprocal, a = 1.0f / a);
 template<class T>
-void BaseMatrixT<T>::reciprocal() { applyUnary(unary::Reciprocal<T>()); }
+void BaseMatrixT<T>::reciprocal2() { applyUnary(unary::Reciprocal<T>()); }
 
 DEFINE_MATRIX_UNARY_OP(Abs, a = a > 0 ? a : -a);
 template<class T>
-void BaseMatrixT<T>::abs() { applyUnary(unary::Abs<T>()); }
+void BaseMatrixT<T>::abs2() { applyUnary(unary::Abs<T>()); }
 
 DEFINE_MATRIX_UNARY_OP(Sign, a = (a > 0) - (a < 0));
 template<class T>
-void BaseMatrixT<T>::sign() { applyUnary(unary::Sign<T>()); }
+void BaseMatrixT<T>::sign2() { applyUnary(unary::Sign<T>()); }
 
 DEFINE_MATRIX_UNARY_OP(Zero, a = 0);
 template<class T>
@@ -405,7 +405,7 @@ void BaseMatrixT<T>::one() { applyUnary(unary::One<T>()); }
 
 DEFINE_MATRIX_UNARY_PARAMETER_OP(Pow, ONE_PARAMETER, a = pow(a, p));
 template<>
-void BaseMatrixT<real>::pow(real p) {
+void BaseMatrixT<real>::pow2(real p) {
   if (useGpu_) {
     applyUnary(unary::Pow<real>(p));
   } else {
@@ -534,7 +534,7 @@ void BaseMatrixT<T>::add(BaseMatrixT& b, T p) {
 
 DEFINE_MATRIX_BINARY_PARAMETER_OP(Pow, ONE_PARAMETER, a = pow(b, p));
 template<>
-void BaseMatrixT<real>::pow(BaseMatrixT& b, real p) {
+void BaseMatrixT<real>::pow2(BaseMatrixT& b, real p) {
   if (useGpu_) {
     applyBinary(binary::Pow<real>(p), b);
   } else {
@@ -615,7 +615,7 @@ void BaseMatrixT<T>::breluDerivative(BaseMatrixT& b) {
 
 DEFINE_MATRIX_BINARY_OP(Square, b = a * a);
 template<class T>
-void BaseMatrixT<T>::square(BaseMatrixT& b) {
+void BaseMatrixT<T>::square2(BaseMatrixT& b) {
   applyBinary(binary::Square<T>(), b);
 }
 
@@ -654,7 +654,7 @@ void BaseMatrixT<T>::scaledTanhDerivative(BaseMatrixT& b, T p1, T p2) {
 
 DEFINE_MATRIX_BINARY_OP(Reciprocal, b = 1.0f / a);
 template<class T>
-void BaseMatrixT<T>::reciprocal(BaseMatrixT& b) {
+void BaseMatrixT<T>::reciprocal2(BaseMatrixT& b) {
   applyBinary(binary::Reciprocal<T>(), b);
 }
 
@@ -666,7 +666,7 @@ void BaseMatrixT<T>::reciprocalDerivative(BaseMatrixT& b) {
 
 DEFINE_MATRIX_BINARY_OP(Abs, b = a > 0.0f ? a : -a);
 template<class T>
-void BaseMatrixT<T>::abs(BaseMatrixT& b) { applyBinary(binary::Abs<T>(), b); }
+void BaseMatrixT<T>::abs2(BaseMatrixT& b) { applyBinary(binary::Abs<T>(), b); }
 
 DEFINE_MATRIX_BINARY_OP(AbsDerivative, a = (b > 0) ? a : (b < 0) ? -a : 0);
 template<class T>
@@ -726,17 +726,19 @@ void BaseMatrixT<T>::expDerivative(BaseMatrixT& b) {
 
 DEFINE_MATRIX_BINARY_OP(Sign, b = a > 0.0f ? 1.0f : -1.0f);
 template<class T>
-void BaseMatrixT<T>::sign(BaseMatrixT& b) { applyBinary(binary::Sign<T>(), b); }
+void BaseMatrixT<T>::sign2(BaseMatrixT& b) {
+  applyBinary(binary::Sign<T>(), b);
+}
 
 DEFINE_MATRIX_BINARY_OP(Exp, a = exp(b));
 template<>
-void BaseMatrixT<real>::exp(BaseMatrixT& b) {
+void BaseMatrixT<real>::exp2(BaseMatrixT& b) {
   applyBinary(binary::Exp<real>(), b);
 }
 
 DEFINE_MATRIX_BINARY_OP(Log, a = log(b));
 template<>
-void BaseMatrixT<real>::log(BaseMatrixT& b) {
+void BaseMatrixT<real>::log2(BaseMatrixT& b) {
   if (useGpu_) {
     applyBinary(binary::Log<real>(), b);
   } else {
@@ -746,7 +748,7 @@ void BaseMatrixT<real>::log(BaseMatrixT& b) {
 
 DEFINE_MATRIX_BINARY_OP(Sqrt, a = sqrt(b));
 template<>
-void BaseMatrixT<real>::sqrt(BaseMatrixT& b) {
+void BaseMatrixT<real>::sqrt2(BaseMatrixT& b) {
   applyBinary(binary::Sqrt<real>(), b);
 }
 
@@ -1062,7 +1064,7 @@ void BaseMatrixT<T>::biggerThan(BaseMatrixT& b,
 
 DEFINE_MATRIX_TERNARY_OP(Max, a = (b > c) ? b : c);
 template<class T>
-void BaseMatrixT<T>::max(BaseMatrixT& b, BaseMatrixT& c) {  // NOLINT
+void BaseMatrixT<T>::max2(BaseMatrixT& b, BaseMatrixT& c) {
   applyTernary(ternary::Max<T>(), b, c);
 }
 
@@ -1165,7 +1167,7 @@ void BaseMatrixT<T>::reciprocalSum(BaseMatrixT& b, BaseMatrixT& c, T p1, T p2,
 DEFINE_MATRIX_BINARY_PARAMETER_OP(Reciprocal2, TWO_PARAMETER,
                                   a = 1 / (p1 * b + p2));
 template<class T>
-void BaseMatrixT<T>::reciprocal(BaseMatrixT& b, T p1, T p2) {
+void BaseMatrixT<T>::reciprocal2(BaseMatrixT& b, T p1, T p2) {
   applyBinary(binary::Reciprocal2<T>(p1, p2), b);
 }
 

paddle/math/BaseMatrix.h

@@ -17,6 +17,7 @@ limitations under the License. */
 #include <cstddef>
 #include <stdint.h>
 #include "paddle/utils/TypeDefs.h"
+#include "TensorExpression.h"
 
 namespace paddle {
 
@@ -66,7 +67,7 @@ public:
 };
 
 template<class T>
-class BaseMatrixT {
+class BaseMatrixT : public TensorExpression<BaseMatrixT<T>, T> {
 public:
   size_t height_, width_;
   size_t stride_;
@@ -351,14 +352,14 @@ public:
    *
    */
   void neg();
-  void exp();
-  void pow(T p);
-  void log();
-  void sqrt();
-  void square();
-  void reciprocal();
-  void abs();
-  void sign();
+  void exp2();
+  void pow2(T p);
+  void log2();
+  void sqrt2();
+  void square2();
+  void reciprocal2();
+  void abs2();
+  void sign2();
   void zero();
 
   /**
@@ -516,7 +517,7 @@ public:
    * b = this * this
    * @endcode
    */
-  void square(BaseMatrixT& b);
+  void square2(BaseMatrixT& b);
   void squareDerivative(BaseMatrixT& b);
 
   /**
@@ -540,7 +541,7 @@ public:
    * b = 1.0f / this
    * @endcode
    */
-  void reciprocal(BaseMatrixT& b);
+  void reciprocal2(BaseMatrixT& b);
   void reciprocalDerivative(BaseMatrixT& b);
 
   /**
@@ -548,7 +549,7 @@ public:
    * b = this > 0.0f ? this : -this
    * @endcode
    */
-  void abs(BaseMatrixT& b);
+  void abs2(BaseMatrixT& b);
   void absDerivative(BaseMatrixT& b);
 
   /**
@@ -566,12 +567,12 @@ public:
    */
   void expDerivative(BaseMatrixT& b);
 
-  void sign(BaseMatrixT& b);
+  void sign2(BaseMatrixT& b);
 
-  void exp(BaseMatrixT& b);
-  void pow(BaseMatrixT& b, T p);
-  void log(BaseMatrixT& b);
-  void sqrt(BaseMatrixT& b);
+  void exp2(BaseMatrixT& b);
+  void pow2(BaseMatrixT& b, T p);
+  void log2(BaseMatrixT& b);
+  void sqrt2(BaseMatrixT& b);
   void addScalar(BaseMatrixT& b, T p);
   void subScalar(BaseMatrixT& b, T p);
   void mulScalar(BaseMatrixT& b, T p);
@@ -742,7 +743,7 @@ public:
    * this = b>c ? b : c
    * @endcode
    */
-   void max(BaseMatrixT& b, BaseMatrixT& c);  //  NOLINT
+  void max2(BaseMatrixT& b, BaseMatrixT& c);
 
   /**
    * @code
@@ -837,7 +838,7 @@ public:
    * this = 1 / (p1 * b + p2)
    * @endcode
    */
-  void reciprocal(BaseMatrixT& b, T p1, T p2);
+  void reciprocal2(BaseMatrixT& b, T p1, T p2);
 
   /**
    * @code
@@ -953,6 +954,32 @@ public:
   virtual bool isSparse() const {
     return false;
   }
+
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    if (useGpu_) {
+      TensorGpuApply<T>(*this, expr);
+    } else {
+      TensorCpuApply<T>(*this, expr);
+    }
+  }
+
+  template<typename ExpressionType>
+  void operator+=(const ExpressionType& expr) {
+    (*this) = (*this) + expr;
+  }
+  template<typename ExpressionType>
+  void operator-=(const ExpressionType& expr) {
+    (*this) = (*this) - expr;
+  }
+  template<typename ExpressionType>
+  void operator*=(const ExpressionType& expr) {
+    (*this) = (*this) * expr;
+  }
+  template<typename ExpressionType>
+  void operator/=(const ExpressionType& expr) {
+    (*this) = (*this) / expr;
+  }
 };
 
 typedef BaseMatrixT<real> BaseMatrix;

paddle/math/CMakeLists.txt

@@ -16,10 +16,12 @@ file(GLOB MATH_HEADERS . *.h)
 file(GLOB MATH_SOURCES . *.cpp)
 set(MATH_SOURCES
     "${PROJ_ROOT}/paddle/math/BaseMatrix.cu"
+    "${PROJ_ROOT}/paddle/math/TrainingAlgorithmOp.cu"
     ${MATH_SOURCES})
 if(NOT WITH_GPU)
     # then compile BaseMatrix.cu as c++ file
     compile_cu_as_cpp("${PROJ_ROOT}/paddle/math/BaseMatrix.cu")
+    compile_cu_as_cpp("${PROJ_ROOT}/paddle/math/TrainingAlgorithmOp.cu")
     add_library(paddle_math STATIC
         ${MATH_SOURCES})
 else()

paddle/math/CpuSparseMatrix.h

@@ -125,7 +125,7 @@ public:
     return sum;
   }
 
-  virtual void square() {
+  virtual void square2() {
     CHECK(isContiguous());
     if (valueType_ == NO_VALUE) {
       return;

paddle/math/Matrix.h

@@ -930,6 +930,15 @@ public:
   virtual void paramReluBackwardDiff(Matrix& oGrad, Matrix& data, Matrix& W) {
     LOG(FATAL) << "Not implemented";
   }
+
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    if (useGpu_) {
+      TensorGpuApply<real>(*this, expr);
+    } else {
+      TensorCpuApply<real>(*this, expr);
+    }
+  }
 };
 
 inline std::ostream& operator<<(std::ostream& os, const Matrix& mat) {
@@ -1191,6 +1200,11 @@ public:
                                        int contextLength,
                                        int contextStart, int totalPad,
                                        size_t beginPad);
+
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    TensorGpuApply<real>(*this, expr);
+  }
 };
 
 class CpuMatrix : public Matrix {
@@ -1469,6 +1483,11 @@ public:
   void multiBinaryLabelCrossEntropy(Matrix& output, Matrix& label);
   void multiBinaryLabelCrossEntropyBp(Matrix& output, Matrix& label);
   void classificationErrorMulti(Matrix& output, Matrix& label, real threshold);
+
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    TensorCpuApply<real>(*this, expr);
+  }
 };
 
 class SharedCpuMatrix : public CpuMatrix {
@@ -1504,6 +1523,7 @@ public:
   void add(real p1, real p2);
 
 private:
+  using Matrix::mul;
   void initShared(int blockNum);
   void initBlock(int blockNum);
 

paddle/math/TensorApply.h

+/**
+ * TensorApply.h
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-06
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ *
+ */
+
+#pragma once
+
+namespace paddle {
+
+/**
+ * \brief The tensor evaluator classes.
+ */
+template<typename Derived, class T>
+class TensorApply {
+public:
+  explicit INLINE TensorApply(const Derived& p)
+    : data_(p.data_), stride_(p.stride_),
+      height_(p.height_), width_(p.width_), useGpu_(p.useGpu_) {}
+
+  INLINE T apply(int i, int j) const {
+    return data_[i * stride_ + j];
+  }
+  INLINE T apply(int index) const {
+    return data_[index];
+  }
+  INLINE T& applyRef(int i, int j) {
+    return data_[i * stride_ + j];
+  }
+  INLINE T& applyRef(int index) {
+    return data_[index];
+  }
+
+  INLINE size_t getWidth() const { return width_; }
+  INLINE size_t getHeight() const { return height_; }
+  INLINE bool isContiguous() const { return stride_ == width_ || height_ == 1; }
+  INLINE bool useGpu() const { return useGpu_; }
+
+  T* data_;
+  size_t stride_;
+  size_t height_;
+  size_t width_;
+  bool useGpu_;
+};
+
+/**
+ * \brief The tensor evaluator classes.
+ * 
+ * evaluator for rvalues
+ */
+template<typename Derived, class T>
+class TensorApply<const Derived, T> {
+public:
+  explicit INLINE TensorApply(const Derived& p)
+    : data_(p.data_), stride_(p.stride_),
+      height_(p.height_), width_(p.width_), useGpu_(p.useGpu_) {}
+
+  INLINE T apply(int i, int j) const {
+    return data_[i * stride_ + j];
+  }
+  INLINE T apply(int index) const {
+    return data_[index];
+  }
+
+  INLINE size_t getWidth() const { return width_; }
+  INLINE size_t getHeight() const { return height_; }
+  INLINE bool isContiguous() const { return stride_ == width_ || height_ == 1; }
+  INLINE bool useGpu() const { return useGpu_; }
+
+  const T* data_;
+  size_t stride_;
+  size_t height_;
+  size_t width_;
+  bool useGpu_;
+};
+
+template<typename Derived, class T>
+class TensorApply<const TensorExpression<Derived, T>, T> {
+public:
+  explicit TensorApply(const TensorExpression<Derived, T>& expr)
+    : expr_(expr.derived()) {}
+
+  INLINE T apply(int i, int j) const {
+    return expr_.apply(i, j);
+  }
+  INLINE T apply(int index) const {
+    return expr_.apply(index);
+  }
+
+  INLINE size_t getWidth() const { return expr_.getWidth(); }
+  INLINE size_t getHeight() const { return expr_.getHeight(); }
+  INLINE bool isContiguous() const { return expr_.isContiguous(); }
+  INLINE bool useGpu() const { return expr_.useGpu(); }
+
+  TensorApply<const Derived, T> expr_;
+};
+
+/**
+ * \brief The unary expression evaluator classes.
+ */
+template<class OP, typename ArgType, class T>
+class TensorApply<const TensorUnaryOp<OP, ArgType, T>, T> {
+public:
+  explicit INLINE TensorApply(const TensorUnaryOp<OP, ArgType, T>& expr)
+    : op_(expr.op_), expr_(expr.expr_) {}
+
+  INLINE T apply(int i, int j) const {
+    return op_(expr_.apply(i, j));
+  }
+  INLINE T apply(int index) const {
+    return op_(expr_.apply(index));
+  }
+
+  INLINE size_t getWidth() const { return expr_.getWidth(); }
+  INLINE size_t getHeight() const { return expr_.getHeight(); }
+  INLINE bool isContiguous() const { return expr_.isContiguous(); }
+  INLINE bool useGpu() const { return expr_.useGpu(); }
+
+  const OP op_;
+  TensorApply<ArgType, T> expr_;
+};
+
+/**
+ * \brief The binary expression evaluator classes.
+ */
+template<class OP, typename LhsType, typename RhsType, class T>
+class TensorApply<const TensorBinaryOp<OP, LhsType, RhsType, T>, T> {
+public:
+  explicit INLINE TensorApply(
+    const TensorBinaryOp<OP, LhsType, RhsType, T>& expr)
+      : op_(expr.op_), lhs_(expr.lhs_), rhs_(expr.rhs_) {
+    #ifndef __CUDA_ARCH__
+      CHECK_EQ(lhs_.getWidth(), rhs_.getWidth());
+      CHECK_EQ(lhs_.getHeight(), rhs_.getHeight());
+      CHECK_EQ(lhs_.useGpu(), rhs_.useGpu());
+    #endif
+  }
+
+  INLINE T apply(int i, int j) const {
+    return op_(lhs_.apply(i, j), rhs_.apply(i, j));
+  }
+  INLINE T apply(int index) const {
+    return op_(lhs_.apply(index), rhs_.apply(index));
+  }
+
+  INLINE size_t getWidth() const { return lhs_.getWidth(); }
+  INLINE size_t getHeight() const { return rhs_.getHeight(); }
+  INLINE bool isContiguous() const {
+    return lhs_.isContiguous() && rhs_.isContiguous();
+  }
+  INLINE bool useGpu() const { return lhs_.useGpu(); }
+
+  const OP op_;
+  TensorApply<LhsType, T> lhs_;
+  TensorApply<RhsType, T> rhs_;
+};
+
+/**
+ * \brief The ternary expression evaluator classes.
+ */
+template<typename ArgType1, typename ArgType2, typename ArgType3, class T>
+class TensorApply<const TensorTernaryOp<ArgType1, ArgType2, ArgType3, T>, T> {
+public:
+  explicit INLINE TensorApply(
+    const TensorTernaryOp<ArgType1, ArgType2, ArgType3, T>& expr)
+    : expr1_(expr.expr1_), expr2_(expr.expr2_), expr3_(expr.expr3_) {
+    #ifndef __CUDA_ARCH__
+     CHECK_EQ(expr1_.getWidth(), expr2_.getWidth());
+     CHECK_EQ(expr1_.getWidth(), expr3_.getWidth());
+     CHECK_EQ(expr1_.getHeight(), expr2_.getHeight());
+     CHECK_EQ(expr1_.getHeight(), expr3_.getHeight());
+     CHECK_EQ(expr1_.useGpu(), expr2_.useGpu());
+     CHECK_EQ(expr1_.useGpu(), expr3_.useGpu());
+    #endif
+  }
+
+  INLINE T apply(int i, int j) const {
+    return expr1_.apply(i, j) ? expr2_.apply(i, j) : expr3_.apply(i, j);
+  }
+  INLINE T apply(int index) const {
+    return expr1_.apply(index) ? expr2_.apply(index) : expr3_.apply(index);
+  }
+
+  INLINE size_t getWidth() const { return expr1_.getWidth(); }
+  INLINE size_t getHeight() const { return expr1_.getHeight(); }
+  INLINE bool isContiguous() const {
+    return expr1_.isContiguous() &&
+      expr2_.isContiguous() && expr3_.isContiguous();
+  }
+  INLINE bool useGpu() const { return expr1_.useGpu(); }
+
+  TensorApply<ArgType1, T> expr1_;
+  TensorApply<ArgType2, T> expr2_;
+  TensorApply<ArgType3, T> expr3_;
+};
+
+/**
+ * \brief The const expression evaluator classes.
+ */
+template<class OP, typename ArgType, class T>
+class TensorApply<const TensorConstant<OP, ArgType, T>, T> {
+public:
+  explicit INLINE TensorApply(const TensorConstant<OP, ArgType, T>& expr)
+    : op_(expr.op_), expr_(expr.expr_) {}
+
+  INLINE T apply(int i, int j) const {
+    return op_(i, j);
+  }
+  INLINE T apply(int index) const {
+    return op_(index);
+  }
+
+  INLINE size_t getWidth() const { return expr_.getWidth(); }
+  INLINE size_t getHeight() const { return expr_.getHeight(); }
+  INLINE bool isContiguous() const { return true; }
+  INLINE bool useGpu() const { return expr_.useGpu(); }
+
+  const OP op_;
+  TensorApply<ArgType, T> expr_;
+};
+
+}  // namespace paddle

paddle/math/TensorEvaluate.h

+/**
+ * TensorEvaluate.h
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-06
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ *
+ */
+
+#pragma once
+
+#include <algorithm>
+#include "paddle/utils/Logging.h"
+#include "hl_base.h"
+
+namespace paddle {
+
+/**
+ * \brief The tensor cpu evaluate api.
+ */
+template<class T, typename LeftType, typename RightType>
+inline void TensorCpuApply(LeftType& lhs, const RightType& rhs) {
+  TensorApply<LeftType, T> lhs_(lhs);
+  TensorApply<const RightType, T> rhs_(rhs);
+  CHECK_EQ(lhs_.getWidth(), rhs_.getWidth());
+  CHECK_EQ(lhs_.getHeight(), rhs_.getHeight());
+  CHECK_EQ(lhs_.useGpu(), rhs_.useGpu());
+
+  if (lhs_.isContiguous() && rhs_.isContiguous()) {
+    int size = lhs_.getHeight() * lhs_.getWidth();
+    for (int index = 0; index < size; index++) {
+      lhs_.applyRef(index) = rhs_.apply(index);
+    }
+  } else {
+    for (size_t i = 0; i < lhs_.getHeight(); i++) {
+      for (size_t j = 0; j < lhs_.getWidth(); j++) {
+        lhs_.applyRef(i, j) = rhs_.apply(i, j);
+      }
+    }
+  }
+}
+
+#ifdef __NVCC__
+template<typename LeftType, typename RightType>
+__global__
+void TensorElementWiseOp(LeftType lhs, RightType rhs, const int border) {
+  const int idx = blockIdx.x * blockDim.x + threadIdx.x;
+  if (idx < border) {
+    lhs.applyRef(idx) = rhs.apply(idx);
+  }
+}
+
+template<typename LeftType, typename RightType>
+__global__ void TensorElementWiseOp(LeftType lhs, RightType rhs) {
+  const int colIdx = blockIdx.x * blockDim.x + threadIdx.x;
+  const int rowIdx = blockIdx.y * blockDim.y + threadIdx.y;
+  for (int i = rowIdx; i < lhs.getHeight(); i += gridDim.y * blockDim.y) {
+    for (int j = colIdx; j < lhs.getWidth(); j += gridDim.x * blockDim.x) {
+      lhs.applyRef(i, j) = rhs.apply(i, j);
+    }
+  }
+}
+
+/**
+ * \brief The tensor gpu evaluate api.
+ */
+template<class T, typename LeftType, typename RightType>
+inline void TensorGpuApply(LeftType& lhs, const RightType& rhs) {
+  TensorApply<LeftType, T> lhs_(lhs);
+  TensorApply<const RightType, T> rhs_(rhs);
+  CHECK_EQ(lhs_.getWidth(), rhs_.getWidth());
+  CHECK_EQ(lhs_.getHeight(), rhs_.getHeight());
+  CHECK_EQ(lhs_.useGpu(), rhs_.useGpu());
+
+  int dimM = lhs_.getHeight();
+  int dimN = lhs_.getWidth();
+
+  if (lhs_.isContiguous() && rhs_.isContiguous()) {
+    int size = dimM * dimN;
+    int blockSize = size <= 1024 ? size : 1024;
+    int gridSize = (size + 1024 - 1) / 1024;
+    TensorElementWiseOp
+      <<<gridSize, blockSize, 0, STREAM_DEFAULT>>>(lhs_, rhs_, size);
+  } else {
+    int blockSizeY = std::min(32, dimM);
+    int blockSizeX = (32 / blockSizeY) * 32;
+    int gridSizeX = std::min(32, (dimN + blockSizeX - 1) / blockSizeX);
+    int gridSizeY = std::min(32, (dimM + blockSizeY - 1) / blockSizeY);
+    dim3 threads(blockSizeX, blockSizeY);
+    dim3 grid(gridSizeX, gridSizeY);
+    TensorElementWiseOp
+      <<<grid, threads, 0, STREAM_DEFAULT>>>(lhs_, rhs_);
+  }
+
+  CHECK_SYNC("TensorGpuApply failed");
+}
+#else
+template<class T, typename LeftType, typename RightType>
+inline void TensorGpuApply(LeftType& lhs, RightType& rhs) {
+}
+#endif
+
+}  // namespace paddle

paddle/math/TensorExpression.h

+/**
+ * TensorExpression.h
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-06
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ *
+ */
+
+#pragma once
+#include <cstddef>
+#include <stdint.h>
+#include "paddle/utils/TypeDefs.h"
+#include "paddle/utils/Logging.h"
+#include "hl_tensor_ops.h"
+
+namespace paddle {
+
+template<class OP, typename ExprType, class T> class TensorConstant;
+template<class OP, typename ExprType, class T> class TensorUnaryOp;
+template<
+class OP, typename LhsType, typename RhsType, class T> class TensorBinaryOp;
+template<
+typename ExprType1,
+typename ExprType2,
+typename ExprType3,
+class T> class TensorTernaryOp;
+
+/**
+ * \brief Tensor base class.
+ * 
+ * This is the base class of all Tensor and Expression class.
+ */
+template<typename Derived, class T>
+class TensorExpression {
+public:
+  /**
+   * Element wise unary expression.
+   */
+  template<typename UnaryOp>
+  const TensorUnaryOp<UnaryOp, const Derived, T>
+  unaryExpression(const UnaryOp& op) const {
+    return TensorUnaryOp<UnaryOp, const Derived, T>(op, derived());
+  }
+
+  const TensorUnaryOp<hppl::unary::add_scale<T>, const Derived, T>
+  operator+(T p) const {
+    return unaryExpression(hppl::unary::add_scale<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::sub_scale<T>, const Derived, T>
+  operator-(T p) const {
+    return unaryExpression(hppl::unary::sub_scale<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::mul_scale<T>, const Derived, T>
+  operator*(T p) const {
+    return unaryExpression(hppl::unary::mul_scale<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::div_scale<T>, const Derived, T>
+  operator/(T p) const {
+    return unaryExpression(hppl::unary::div_scale<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::neg<T>, const Derived, T>
+  operator-() const {
+    return unaryExpression(hppl::unary::neg<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::exp_op<T>, const Derived, T>
+  exp() const {
+    return unaryExpression(hppl::unary::exp_op<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::log_op<T>, const Derived, T>
+  log() const {
+    return unaryExpression(hppl::unary::log_op<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::sqrt_op<T>, const Derived, T>
+  sqrt() const {
+    return unaryExpression(hppl::unary::sqrt_op<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::square<T>, const Derived, T>
+  square() const {
+    return unaryExpression(hppl::unary::square<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::reciprocal<T>, const Derived, T>
+  reciprocal() const {
+    return unaryExpression(hppl::unary::reciprocal<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::abs<T>, const Derived, T>
+  abs() const {
+    return unaryExpression(hppl::unary::abs<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::sign<T>, const Derived, T>
+  sign() const {
+    return unaryExpression(hppl::unary::sign<T>());
+  }
+
+  const TensorUnaryOp<hppl::unary::pow_op<T>, const Derived, T>
+  pow(T p) const {
+    return unaryExpression(hppl::unary::pow_op<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::min<T>, const Derived, T>
+  min(T p) const {
+    return unaryExpression(hppl::unary::min<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::max<T>, const Derived, T>
+  max(T p) const {
+    return unaryExpression(hppl::unary::max<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::cmp_eq<T>, const Derived, T>
+  operator==(T p) const {
+    return unaryExpression(hppl::unary::cmp_eq<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::cmp_ne<T>, const Derived, T>
+  operator!=(T p) const {
+    return unaryExpression(hppl::unary::cmp_ne<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::cmp_le<T>, const Derived, T>
+  operator<=(T p) const {
+    return unaryExpression(hppl::unary::cmp_le<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::cmp_lt<T>, const Derived, T>
+  operator<(T p) const {
+    return unaryExpression(hppl::unary::cmp_lt<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::cmp_ge<T>, const Derived, T>
+  operator>=(T p) const {
+    return unaryExpression(hppl::unary::cmp_ge<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::cmp_gt<T>, const Derived, T>
+  operator>(T p) const {
+    return unaryExpression(hppl::unary::cmp_gt<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::and_op<T>, const Derived, T>
+  operator&&(T p) const {
+    return unaryExpression(hppl::unary::and_op<T>(p));
+  }
+
+  const TensorUnaryOp<hppl::unary::or_op<T>, const Derived, T>
+  operator||(T p) const {
+    return unaryExpression(hppl::unary::or_op<T>(p));
+  }
+
+  /**
+   * Element wise binary expression.
+   */
+  template<typename BinaryOp, typename ExpressionType>
+  const TensorBinaryOp<BinaryOp, const Derived, const ExpressionType, T>
+  binaryExpression(const BinaryOp& op, const ExpressionType& expr) const {
+    return TensorBinaryOp<BinaryOp, const Derived, const ExpressionType, T>(
+      op, derived(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::cmp_eq<T>, const Derived, const ExpressionType, T>
+  operator==(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::cmp_eq<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::cmp_ne<T>, const Derived, const ExpressionType, T>
+  operator!=(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::cmp_ne<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::cmp_le<T>, const Derived, const ExpressionType, T>
+  operator<=(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::cmp_le<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::cmp_lt<T>, const Derived, const ExpressionType, T>
+  operator<(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::cmp_lt<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::cmp_ge<T>, const Derived, const ExpressionType, T>
+  operator>=(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::cmp_ge<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::cmp_gt<T>, const Derived, const ExpressionType, T>
+  operator>(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::cmp_gt<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::and_op<T>, const Derived, const ExpressionType, T>
+  operator&&(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::and_op<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::or_op<T>, const Derived, const ExpressionType, T>
+  operator||(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::or_op<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::add<T>, const Derived, const ExpressionType, T>
+  operator+(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::add<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::sub<T>, const Derived, const ExpressionType, T>
+  operator-(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::sub<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::mul<T>, const Derived, const ExpressionType, T>
+  operator*(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::mul<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::div<T>, const Derived, const ExpressionType, T>
+  operator/(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::div<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::min<T>, const Derived, const ExpressionType, T>
+  min(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::min<T>(), expr);
+  }
+
+  template<typename ExpressionType>
+  const TensorBinaryOp<
+    hppl::binary::max<T>, const Derived, const ExpressionType, T>
+  max(const ExpressionType& expr) const {
+    return binaryExpression(hppl::binary::max<T>(), expr);
+  }
+
+  /**
+   * Element wise ternary expression.
+   *
+   * ternary conditional operator(?: operator).
+   * The conditional expression returns one of two values depending on
+   * the result of derived expression.
+   * If derived expression evaluates to true, then expression1 is evaluated.
+   * If derived expression evaluates to false, then expression2 is evaluated.
+   */
+  template<typename ExprType1, typename ExprType2>
+  const TensorTernaryOp<const Derived, const ExprType1, const ExprType2, T>
+  condition(const ExprType1& expr1, const ExprType2& expr2) const {
+    return TensorTernaryOp<const Derived, const ExprType1, const ExprType2, T>
+      (derived(), expr1, expr2);
+  }
+
+  template<typename ExprType>
+  const TensorTernaryOp<
+    const Derived,
+    const TensorConstant<hppl::unary::constant<T>, const Derived, T>,
+    const ExprType,
+    T>
+  condition(T p, const ExprType& expr) const {
+    return condition(constant(p), expr);
+  }
+
+  template<typename ExprType>
+  const TensorTernaryOp<
+    const Derived,
+    const ExprType,
+    const TensorConstant<hppl::unary::constant<T>, const Derived, T>,
+    T>
+  condition(const ExprType& expr, T p) const {
+    return condition(expr, constant(p));
+  }
+
+  const TensorTernaryOp<
+    const Derived,
+    const TensorConstant<hppl::unary::constant<T>, const Derived, T>,
+    const TensorConstant<hppl::unary::constant<T>, const Derived, T>,
+    T>
+  condition(T p1, T p2) const {
+    return condition(constant(p1), constant(p2));
+  }
+
+  const TensorConstant<hppl::unary::constant<T>, const Derived, T>
+  constant(T p) const {
+    return TensorConstant<hppl::unary::constant<T>, const Derived, T>
+      (hppl::unary::constant<T>(p), derived());
+  }
+
+protected:
+  const Derived& derived() const { return *static_cast<const Derived*>(this); }
+};
+
+/**
+ * \brief Unary Operator Expression
+ */
+template<class OP, typename ExprType, class T>
+class TensorUnaryOp
+    : public TensorExpression<TensorUnaryOp<OP, ExprType, T>, T> {
+public:
+  explicit TensorUnaryOp(const OP op, const ExprType& expr)
+    : op_(op), expr_(expr) {}
+
+  const OP op_;
+  const ExprType expr_;
+};
+
+/**
+ * \brief Binary Operator Expression
+ */
+template<class OP, typename LhsType, typename RhsType, class T>
+class TensorBinaryOp
+    : public TensorExpression<TensorBinaryOp<OP, LhsType, RhsType, T>, T> {
+public:
+  explicit TensorBinaryOp(const OP op, const LhsType& lhs, const RhsType& rhs)
+    : op_(op), lhs_(lhs), rhs_(rhs) {}
+
+  const OP op_;
+  const LhsType lhs_;
+  const RhsType rhs_;
+};
+
+/**
+ * \brief Ternary Operator Expression
+ */
+template<typename ExprType1, typename ExprType2, typename ExprType3, class T>
+class TensorTernaryOp
+    : public TensorExpression<
+        TensorTernaryOp<ExprType1, ExprType2, ExprType3, T>, T> {
+public:
+  explicit TensorTernaryOp(
+    const ExprType1& expr1, const ExprType2& expr2, const ExprType3& expr3)
+    : expr1_(expr1), expr2_(expr2), expr3_(expr3) {}
+
+  const ExprType1 expr1_;
+  const ExprType2 expr2_;
+  const ExprType3 expr3_;
+};
+
+/**
+ * \brief Constant Expression
+ */
+template<class OP, typename ExprType, class T>
+class TensorConstant
+    : public TensorExpression<TensorConstant<OP, ExprType, T>, T> {
+public:
+  explicit TensorConstant(const OP op, const ExprType& expr)
+    : op_(op), expr_(expr) {}
+
+  const OP op_;
+  const ExprType expr_;
+};
+
+/**
+ * \brief operator+ overload
+ * \return a unary operator expression
+ */
+template<typename Derived, class T>
+const TensorUnaryOp<hppl::unary::add_scale<T>, const Derived, T>
+operator+(T p, const TensorExpression<Derived, T>& expr) {
+  return expr + p;
+}
+
+/**
+ * \brief operator* overload
+ * \return a unary operator expression
+ */
+template<typename Derived, class T>
+const TensorUnaryOp<hppl::unary::mul_scale<T>, const Derived, T>
+operator*(T p, const TensorExpression<Derived, T>& expr) {
+  return expr * p;
+}
+
+}  // namespace paddle
+
+#include "TensorApply.h"
+#include "TensorEvaluate.h"
+

paddle/math/TrainingAlgorithmOp.cu

+/**
+ * TrainingAlgorithmOp.cu
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-29
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ *
+ */
+
+#include "paddle/utils/Logging.h"
+#include "BaseMatrix.h"
+#include "TrainingAlgorithmOp.h"
+
+namespace paddle {
+
+void sparseMomentumApply(BaseMatrix& value,
+                         BaseMatrix& grad,
+                         BaseMatrix& momU,
+                         BaseMatrix& momV,
+                         real alpha,
+                         real beta,
+                         real gamma,
+                         real tau,
+                         real learningRate) {
+  /**
+   * \alpha_t = \alpha_{t-1} / k
+   * \beta_t = \beta_{t-1} / (1 + \lambda\gamma_t)
+   * u_t = u_{t-1} - \alpha_t \gamma_t g_t
+   * v_t = v_{t-1} + \tau_{t-1} \alpha_t \gamma_t g_t
+   * \tau_t = \tau_{t-1} + \beta_t / \alpha_t
+   */
+  momU -= (alpha * gamma * learningRate) * grad;
+  momV += (tau * alpha * gamma * learningRate) * grad;
+  value = (tau / beta + (real)1 / alpha) * momU + ((real)1 / beta) * momV;
+}
+
+void adadeltaApply(BaseMatrix& value,
+                   BaseMatrix& grad,
+                   BaseMatrix& mom,
+                   BaseMatrix& accum,
+                   BaseMatrix& accum_update,
+                   BaseMatrix& lr,
+                   real rou,
+                   real epsilon,
+                   real learningRate,
+                   real momentum,
+                   real decayRate) {
+  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
+  accum = rou * accum + ((real)1 - rou) * grad.square();
+
+  // learn_rate: sqrt(( E(dx_{t-1}^2) + epsilon ) / ( E(g_t^2) + epsilon ))
+  lr = ((accum_update + epsilon) / (accum + epsilon)).sqrt();
+
+  // E(dx_t^2) = \rou * E(dx_{t-1}^2) + (1-\rou) * (-g*learn_rate)^2
+  accum_update = rou * accum_update + ((real)1 - rou) * (grad * lr).square();
+
+  mom = mom * momentum - learningRate * lr * (grad + value * decayRate);
+  value += mom;
+}
+
+void adagradApply(BaseMatrix& value,
+                  BaseMatrix& grad,
+                  BaseMatrix& mom,
+                  BaseMatrix& accum_buffer,
+                  BaseMatrix& accum,
+                  BaseMatrix& lr,
+                  real epsilon,
+                  real learningRate,
+                  real momentum,
+                  real decayRate) {
+  accum += grad.square();
+  lr = (accum_buffer + accum + epsilon).sqrt().reciprocal();
+  mom = mom * momentum - learningRate * lr * (grad + value * decayRate);
+  value += mom;
+}
+
+void rmspropApply(BaseMatrix& value,
+                  BaseMatrix& grad,
+                  BaseMatrix& mom,
+                  BaseMatrix& g,
+                  BaseMatrix& f,
+                  BaseMatrix& lr,
+                  real accumulatedRou,
+                  real rou,
+                  real epsilon,
+                  real learningRate,
+                  real momentum,
+                  real decayRate,
+                  bool firstTime) {
+  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
+  // For the first time update, make the sum be the current square
+  // so that the initial estimation of E(g_t^2) will not be too small.
+  if (firstTime) {
+    g = accumulatedRou * g + grad.square();
+  } else {
+    g = accumulatedRou * g + ((real)1 - rou) * grad.square();
+  }
+
+  // E(f_t) = \rou * E(f_{t-1}) + (1-\rou) * g
+  f = accumulatedRou * f + ((real)1 - rou) * grad;
+
+  // learn_rate = 1/sqrt( ( E(g_t^2) - (E(f_t))^2 + epsilon )
+  // Basiclly if the sign of the gradient changes more often,
+  // the learning rate will be decreased.
+  lr = (g - f.square() + epsilon).sqrt().reciprocal();
+
+  mom = mom * momentum - learningRate * lr * (grad + value * decayRate);
+  value += mom;
+}
+
+void decayedAdagradApply(BaseMatrix& value,
+                         BaseMatrix& grad,
+                         BaseMatrix& mom,
+                         BaseMatrix& accum,
+                         BaseMatrix& lr,
+                         real accumulatedRou,
+                         real rou,
+                         real epsilon,
+                         real learningRate,
+                         real momentum,
+                         real decayRate,
+                         bool firstTime) {
+  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
+  // For the first time update, make the sum be the current square
+  // so that the initial estimation of E(g_t^2) will not be too small.
+  if (firstTime) {
+    accum = accumulatedRou * accum + grad.square();
+  } else {
+    accum = accumulatedRou * accum + ((real)1 - rou) * grad.square();
+  }
+
+  // learn_rate = 1/sqrt( ( E(g_t^2) + epsilon )
+  // Basiclly if the bigger the magnitude gradient is,
+  // the smaller the learning rate will be.
+  lr = (accum + epsilon).sqrt().reciprocal();
+
+  mom = mom * momentum - learningRate * lr * (grad + value * decayRate);
+  value += mom;
+}
+
+void adamApply(BaseMatrix& value,
+               BaseMatrix& grad,
+               BaseMatrix& mom,  // firse moment
+               BaseMatrix& v,    // second moment
+               real beta1,
+               real beta2,
+               real beta1_power,
+               real beta2_power,
+               real epsilon,
+               real learningRate) {
+  real alpha = learningRate *
+      std::sqrt((real)1 - beta2_power) / ((real)1 - beta1_power);
+
+  // m_t = \beta_1 * m_{t-1} + (1-\beta_1)* g_t;
+  mom = beta1 * mom + ((real)1 - beta1) * grad;
+
+  // v_t = \beta_2 * v_{t-1} + (1-\beta_2)* g_{t-1}^2
+  v = beta2 * v + ((real)1 - beta2) * grad.square();
+
+  value -=  (mom * alpha) / (v.sqrt() + epsilon);
+}
+
+void adamaxApply(BaseMatrix& value,
+                 BaseMatrix& grad,
+                 BaseMatrix& mom,  // firse moment
+                 BaseMatrix& u,    // weighted infinity norm
+                 real beta1,
+                 real beta2,
+                 int64_t step,
+                 real alpha) {
+  // m_t = \beta_1 * m_{t-1} + (1-\beta_1)* g_t;
+  mom = beta1 * mom + ((real)1 - beta1) * grad;
+
+  // u_t = max(\beta_2*u_{t-1}, abs(g_t))
+  u = (beta2 * u > grad.abs()).condition(beta2 * u, grad.abs());
+
+  // \theta_t = \theta_{t-1} - (\alpha/(1-\beta_1^t))*m_t/u_t
+  value -= (alpha / ((real)1 - (real)std::pow(beta1, step))) * (mom / u);
+}
+
+}  // namespace paddle

paddle/math/TrainingAlgorithmOp.h

+/**
+ * TrainingAlgorithmOp.h
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-29
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ *
+ */
+
+#pragma once
+
+#include "paddle/utils/Logging.h"
+#include "BaseMatrix.h"
+
+namespace paddle {
+
+/**
+ * \brief Sparse Momentum optimizer.
+ */
+extern void sparseMomentumApply(BaseMatrix& value,
+                                BaseMatrix& grad,
+                                BaseMatrix& momU,
+                                BaseMatrix& momV,
+                                real alpha,
+                                real beta,
+                                real gamma,
+                                real tau,
+                                real learningRate);
+
+/**
+ * \brief AdaDelta optimizer.
+ */
+extern void adadeltaApply(BaseMatrix& value,
+                          BaseMatrix& grad,
+                          BaseMatrix& sum,
+                          BaseMatrix& sum1,
+                          BaseMatrix& mom,
+                          BaseMatrix& lr,
+                          real rou,
+                          real epsilon,
+                          real learningRate,
+                          real momentum,
+                          real decayRate);
+
+/**
+ * \brief AdaGrad optimizer.
+ */
+extern void adagradApply(BaseMatrix& value,
+                         BaseMatrix& grad,
+                         BaseMatrix& sum,
+                         BaseMatrix& sum1,
+                         BaseMatrix& mom,
+                         BaseMatrix& lr,
+                         real epsilon,
+                         real learningRate,
+                         real momentum,
+                         real decayRate);
+
+/**
+ * \brief RMSProp optimizer.
+ */
+extern void rmspropApply(BaseMatrix& value,
+                         BaseMatrix& grad,
+                         BaseMatrix& g,
+                         BaseMatrix& f,
+                         BaseMatrix& mom,
+                         BaseMatrix& lr,
+                         real accumulatedRou,
+                         real rou,
+                         real epsilon,
+                         real learningRate,
+                         real momentum,
+                         real decayRate,
+                         bool firstTime);
+
+/**
+ * \brief Decayed AdaGrad optimizer.
+ */
+extern void decayedAdagradApply(BaseMatrix& value,
+                                BaseMatrix& grad,
+                                BaseMatrix& mom,
+                                BaseMatrix& accum,
+                                BaseMatrix& lr,
+                                real accumulatedRou,
+                                real rou,
+                                real epsilon,
+                                real learningRate,
+                                real momentum,
+                                real decayRate,
+                                bool firstTime);
+
+/**
+ * \brief Adam optimizer.
+ */
+extern void adamApply(BaseMatrix& value,
+                      BaseMatrix& grad,
+                      BaseMatrix& mom,
+                      BaseMatrix& v,
+                      real beta1,
+                      real beta2,
+                      real beta1_power,
+                      real beta2_power,
+                      real epsilon,
+                      real learningRate);
+
+/**
+ * \brief AdaMax optimizer.
+ */
+extern void adamaxApply(BaseMatrix& value,
+                        BaseMatrix& grad,
+                        BaseMatrix& mom,  // firse moment
+                        BaseMatrix& u,    // weighted infinity norm
+                        real beta1,
+                        real beta2,
+                        int64_t step,
+                        real alpha);
+
+}  // namespace paddle

paddle/math/Vector.h

@@ -258,6 +258,15 @@ public:
   /// print the "idx" element of the Vector
   virtual void printOneElement(std::ostream& os, size_t idx) const = 0;
 
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    if (BaseVector<T>::useGpu_) {
+      TensorGpuApply<T>(*this, expr);
+    } else {
+      TensorCpuApply<T>(*this, expr);
+    }
+  }
+
 protected:
   friend class GpuVectorT<T>;
   friend class CpuVectorT<T>;
@@ -315,6 +324,11 @@ public:
   virtual void print(std::ostream& os, size_t num) const;
   virtual void printOneElement(std::ostream& os, size_t idx) const;
 
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    TensorGpuApply<T>(*this, expr);
+  }
+
 protected:
   virtual void copyTo(CpuVectorT<T>* dest) const;
   virtual void copyTo(GpuVectorT<T>* dest) const;
@@ -378,6 +392,11 @@ public:
   virtual T get(size_t pos);
   virtual void print(std::ostream& os, size_t num) const;
   virtual void printOneElement(std::ostream& os, size_t idx) const;
+
+  template<typename ExpressionType>
+  void operator=(const ExpressionType& expr) {
+    TensorCpuApply<T>(*this, expr);
+  }
 };
 
 template <class T>

paddle/math/tests/CMakeLists.txt

@@ -3,6 +3,7 @@
 add_simple_unittest(test_ExecViaCpu)
 add_simple_unittest(test_SIMDFunctions)
 add_simple_unittest(test_matrix)
+add_simple_unittest(test_TrainingAlgorithm)
 
 # TODO(yuyang18): Refactor TestUtil.cpp. Remove this cross module reference.
 add_unittest(test_matrixCompare
@@ -13,3 +14,8 @@ add_simple_unittest(test_sparseMatrixCompare)
 add_simple_unittest(test_perturbation)
 add_simple_unittest(test_CpuGpuVector)
 add_simple_unittest(test_Allocator)
+if(COMPILER_SUPPORT_CXX11)
+  LIST(APPEND CUDA_NVCC_FLAGS -std=c++11 -Xcompiler -fPIC --use_fast_math)
+  CUDA_ADD_EXECUTABLE(test_Tensor test_Tensor.cu)
+  link_paddle_test(test_Tensor)
+endif()

paddle/math/tests/OriginalOptimizerApi.h

+/**
+ * OriginalOptimizerApi.h
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-29
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ */
+
+#pragma once
+
+#include "paddle/utils/GlobalConstants.h"
+#include "paddle/math/Vector.h"
+
+using namespace paddle;  // NOLINT
+
+void SparseMomentumParameterOptimizer(const VectorPtr vecs[],
+                                      real alpha,
+                                      real beta,
+                                      real gamma,
+                                      real tau,
+                                      real learningRate) {
+  vecs[PARAMETER_MOMENTUM_UT]->add(*vecs[PARAMETER_GRADIENT],
+                                   -alpha * gamma * learningRate);
+  vecs[PARAMETER_MOMENTUM_VT]->add(*vecs[PARAMETER_GRADIENT],
+                                   tau * alpha * gamma * learningRate);
+  vecs[PARAMETER_VALUE]->add(*vecs[PARAMETER_MOMENTUM_UT],
+                             tau / beta + 1.0 / alpha,
+                             *vecs[PARAMETER_MOMENTUM_VT], 1.0 / beta);
+}
+
+void AdagradParameterOptimizer(const VectorPtr vecs[],
+                               real epsilon,
+                               real learningRate,
+                               real momentum,
+                               real decayRate) {
+  vecs[PARAMETER_GRADIENT_SQURESUM1]->addSquare(*vecs[PARAMETER_GRADIENT],
+                                                1.0f);
+  vecs[PARAMETER_LEARNING_RATE]->add(*vecs[PARAMETER_GRADIENT_SQURESUM],
+                                     *vecs[PARAMETER_GRADIENT_SQURESUM1]);
+  vecs[PARAMETER_LEARNING_RATE]->add(epsilon);
+  vecs[PARAMETER_LEARNING_RATE]->invSqrt(*vecs[PARAMETER_LEARNING_RATE]);
+
+  vecs[PARAMETER_VALUE]->sgdUpdate(
+      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
+      *vecs[PARAMETER_LEARNING_RATE], learningRate,
+      momentum, decayRate);
+}
+
+void AdaDeltaParameterOptimizer(const VectorPtr vecs[],
+                                real rou,
+                                real epsilon,
+                                real learningRate,
+                                real momentum,
+                                real decayRate) {
+  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
+  vecs[PARAMETER_GRADIENT_SQURESUM]->decayAddSquare(*vecs[PARAMETER_GRADIENT],
+                                                    rou, 1.0f - rou);
+
+  // learn_rate = sqrt( ( E(dx_{t-1}^2) + epsilon ) / ( E(g_t^2) + epsilon ) )
+  vecs[PARAMETER_LEARNING_RATE]->dotDiv(*vecs[PARAMETER_GRADIENT_SQURESUM1],
+                                        *vecs[PARAMETER_GRADIENT_SQURESUM],
+                                        epsilon, epsilon);
+  vecs[PARAMETER_LEARNING_RATE]->sqrt2();
+
+  // E(dx_t^2) = \rou * E(dx_{t-1}^2) + (1-\rou) * (-g*learn_rate)^2
+  vecs[PARAMETER_GRADIENT_SQURESUM1]->decayAddSquareMul(
+      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_LEARNING_RATE], rou,
+      1.0f - rou);
+
+  vecs[PARAMETER_VALUE]->sgdUpdate(
+      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
+      *vecs[PARAMETER_LEARNING_RATE], learningRate,
+      momentum, decayRate);
+}
+
+void RMSPropParameterOptimizer(const VectorPtr vecs[],
+                               real accumulatedRou,
+                               real rou,
+                               real epsilon,
+                               real learningRate,
+                               real momentum,
+                               real decayRate,
+                               bool firstTime) {
+  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
+  // For the first time update, make the sum be the current square
+  // so that the initial estimation of E(g_t^2) will not be too small.
+  vecs[PARAMETER_GRADIENT_SQURESUM]->decayAddSquare(
+      *vecs[PARAMETER_GRADIENT], accumulatedRou,
+      firstTime ? 1.0f : 1.0f - rou);
+
+  // E(g_t) = \rou * E(g_{t-1}) + (1-\rou) * g
+  vecs[PARAMETER_GRADIENT_SQURESUM1]->add(*vecs[PARAMETER_GRADIENT],
+                                          accumulatedRou, 1.0f - rou);
+
+  // learn_rate = 1/sqrt( ( E(g_t^2) - (E(g_t))^2 + epsilon )
+  // Basiclly if the sign of the gradient changes more often,
+  // the learning rate will be decreased.
+  vecs[PARAMETER_LEARNING_RATE]->assign(*vecs[PARAMETER_GRADIENT_SQURESUM]);
+  vecs[PARAMETER_LEARNING_RATE]->addSquare(*vecs[PARAMETER_GRADIENT_SQURESUM1],
+                                           -1.0f);
+  vecs[PARAMETER_LEARNING_RATE]->add(epsilon);
+  vecs[PARAMETER_LEARNING_RATE]->invSqrt(*vecs[PARAMETER_LEARNING_RATE]);
+
+  vecs[PARAMETER_VALUE]->sgdUpdate(
+      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
+      *vecs[PARAMETER_LEARNING_RATE], learningRate,
+      momentum, decayRate);
+}
+
+void DecayedAdagradParameterOptimizer(const VectorPtr vecs[],
+                                      real accumulatedRou,
+                                      real rou,
+                                      real epsilon,
+                                      real learningRate,
+                                      real momentum,
+                                      real decayRate,
+                                      bool firstTime) {
+  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
+  // For the first time update, make the sum be the current square
+  // so that the initial estimation of E(g_t^2) will not be too small.
+  vecs[PARAMETER_GRADIENT_SQURESUM]->decayAddSquare(
+      *vecs[PARAMETER_GRADIENT], accumulatedRou,
+      firstTime ? 1.0f : 1.0f - rou);
+
+  // learn_rate = 1/sqrt( ( E(g_t^2) + epsilon )
+  // Basiclly if the bigger the magnitude gradient is,
+  // the smaller the learning rate will be.
+  vecs[PARAMETER_LEARNING_RATE]->assign(epsilon);
+  vecs[PARAMETER_LEARNING_RATE]->add(*vecs[PARAMETER_GRADIENT_SQURESUM]);
+  vecs[PARAMETER_LEARNING_RATE]->invSqrt(*vecs[PARAMETER_LEARNING_RATE]);
+
+  vecs[PARAMETER_VALUE]->sgdUpdate(
+      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
+      *vecs[PARAMETER_LEARNING_RATE], learningRate,
+      momentum, decayRate);
+}
+
+void AdamParameterOptimizer(const VectorPtr vecs[],
+                            real beta1,
+                            real beta2,
+                            real beta1_power,
+                            real beta2_power,
+                            real epsilon,
+                            real learningRate) {
+  Vector* m = vecs[PARAMETER_MOMENTUM].get();
+  Vector* g = vecs[PARAMETER_GRADIENT].get();
+  Vector* v = vecs[PARAMETER_SECOND_MOMENTUM].get();
+  Vector* theta = vecs[PARAMETER_VALUE].get();
+
+  // m_t = \beta_1 * m_{t-1} + (1-\beta_1)* g_t;
+  m->add(*g, beta1, 1 - beta1);
+
+  // v_t = \beta_2 * v_{t-1} + (1-\beta_2)* g_{t-1}^2
+  g->square2();
+  v->add(*g, beta2, 1 - beta2);
+
+  // tmp = m_t / ( \sqrt{v_t} + \epsilon )
+  // \theta_t = \theta_{t-1} - \alpha * \sqrt(1-\beta_2^t) / (1-\beta_1^t) * tmp
+  g->sqrt2(*v);
+  g->dotDiv(*m, *g, 0., epsilon);
+  real alpha = learningRate *
+    std::sqrt((real)1 - beta2_power) / ((real)1 - beta1_power);
+  theta->add(*theta, 1.0, *g, -alpha);
+}
+
+void AdamaxParameterOptimizer(const VectorPtr vecs[],
+                              real beta1,
+                              real beta2,
+                              int64_t step,
+                              real alpha) {
+  Vector* m = vecs[PARAMETER_MOMENTUM].get();
+  Vector* g = vecs[PARAMETER_GRADIENT].get();
+  Vector* u = vecs[PARAMETER_WEIGHTED_INFINITY_NORM].get();
+  Vector* theta = vecs[PARAMETER_VALUE].get();
+
+  // m_t = \beta_1 * m_{t-1} + (1-\beta_1)* g_t;
+  m->add(*g, beta1, 1 - beta1);
+
+  // u_t = max(\beta_2*u_{t-1}, abs(g_t))
+  u->mulScalar(beta2);
+  g->abs2();
+  u->max2(*u, *g);
+
+  // \theta_t = \theta_{t-1} - (\alpha/(1-\beta_1^t))*m_t/u_t
+  g->dotDiv(*m, *u);
+  real learningRate = alpha / (1 - std::pow(beta1, step));
+  theta->add(*theta, 1.0, *g, -learningRate);
+}
+

paddle/math/tests/test_TrainingAlgorithm.cpp

+/**
+ * test_TrainingAlgorithm.cpp
+ *
+ * Author: hedaoyuan (hedaoyuan@baidu.com)
+ * Created on: 2016-06-29
+ *
+ * Copyright (c) Baidu.com, Inc. All Rights Reserved
+ */
+
+#include <gtest/gtest.h>
+#include "paddle/utils/Util.h"
+#include "paddle/math/TrainingAlgorithmOp.h"
+#include "OriginalOptimizerApi.h"
+
+using namespace paddle;  // NOLINT
+
+#ifndef PADDLE_TYPE_DOUBLE
+P_DEFINE_double(max_diff, 1e-5, "max diff allowed");
+#else
+P_DEFINE_double(max_diff, 1e-13, "max diff allowed");
+#endif
+
+class SetMaxDiff {
+public:
+  explicit SetMaxDiff(double max_diff) {
+    max_diff_ = FLAGS_max_diff;
+    FLAGS_max_diff = max_diff;
+  }
+  ~SetMaxDiff() {
+    FLAGS_max_diff = max_diff_;
+  }
+private:
+  double max_diff_;
+};
+
+int VectorCheckErr(const Vector& vector1, const Vector& vector2) {
+  CHECK(vector1.getSize() == vector2.getSize());
+
+  const real* data1 = vector1.getData();
+  const real* data2 = vector2.getData();
+  size_t size = vector1.getSize();
+  int count = 0;
+  for (size_t i = 0; i < size; i++) {
+    real a = data1[i];
+    real b = data2[i];
+    if (fabs(a - b) > FLAGS_max_diff) {
+      if ((fabsf(a - b) / fabsf(a)) > (FLAGS_max_diff / 10.0f)) {
+        count++;
+      }
+    }
+  }
+
+  return count;
+}
+
+#define COPY_VECTOR_TO_CPU(cpuVec, vector)  \
+  do {\
+    if (vector->useGpu()) {\
+      cpuVec = Vector::create(vector->getSize(), false);\
+      cpuVec->copyFrom(*vector);\
+    } else {\
+      cpuVec = vector;\
+    }\
+  } while (0)
+
+int VectorCheckErr(const VectorPtr& vector1, const VectorPtr& vector2) {
+  VectorPtr tmp1;
+  VectorPtr tmp2;
+  COPY_VECTOR_TO_CPU(tmp1, vector1);
+  COPY_VECTOR_TO_CPU(tmp2, vector2);
+  return VectorCheckErr(*tmp1, *tmp2);
+}
+
+#ifdef PADDLE_DISABLE_TIMER
+
+#define CHECK_VECTORPTR(vector1, vector2)   \
+    EXPECT_EQ(VectorCheckErr(vector1, vector2), 0)
+
+#define EXPRESSION_PERFORMANCE(expression)  \
+    expression;
+
+#else
+
+#include "paddle/common/Stat.h"
+
+#define CHECK_VECTORPTR(vector1, vector2)
+
+#define EXPRESSION_PERFORMANCE(expression) \
+  do {\
+    char expr[30];\
+    strncpy(expr, #expression, 30);\
+    if (expr[29] != '\0') {\
+      expr[27] = '.'; expr[28] = '.'; expr[29] = '\0';\
+    }\
+    expression;\
+    for (int i = 0; i < 20; i++) {\
+      REGISTER_TIMER(expr);\
+      expression;\
+    }\
+    LOG(INFO) << std::setiosflags(std::ios::left) << std::setfill(' ')\
+      << *globalStat.getStat(expr);\
+    globalStat.reset();\
+  } while (0)
+
+#endif
+
+typedef std::function<void(size_t size, bool useGpu)> testMatrixFunc;
+
+void testCase(testMatrixFunc matrixFunc) {
+  for (auto useGpu : {false, true}) {
+    for (auto size : {1, 32, 64, 128, 512, 1024, 4096, 32768, 65536, 131072,
+                       262144, 524288, 1048576, 2097152}) {
+      LOG(INFO) << " size=" << size << " useGpu=" << useGpu;
+      matrixFunc(size, useGpu);
+    }
+  }
+}
+
+#define INIT_VECTOR(vec1, vec2, type, size, useGpu) \
+    vec1[type] = Vector::create(size, useGpu);      \
+    vec2[type] = Vector::create(size, useGpu);      \
+    vec1[type]->rand();                             \
+    vec2[type]->copyFrom(*vec1[type]);
+
+void testAdagrad(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM1, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_LEARNING_RATE, size, useGpu);
+
+  real epsilon = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real learningRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real momentum = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real decayRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+
+  EXPRESSION_PERFORMANCE(AdagradParameterOptimizer(bufs1,
+    epsilon, learningRate, momentum, decayRate));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *bufs2[PARAMETER_MOMENTUM];
+  BaseMatrix& accum_buffer = *bufs2[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& accum = *bufs2[PARAMETER_GRADIENT_SQURESUM1];
+  BaseMatrix& lr = *bufs2[PARAMETER_LEARNING_RATE];
+
+  EXPRESSION_PERFORMANCE(adagradApply(value, grad, mom, accum_buffer, accum, lr,
+    epsilon, learningRate, momentum, decayRate));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM], bufs2[PARAMETER_MOMENTUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_GRADIENT_SQURESUM1],
+                  bufs2[PARAMETER_GRADIENT_SQURESUM1]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_LEARNING_RATE],
+                  bufs2[PARAMETER_LEARNING_RATE]);
+}
+
+TEST(Training, Adagrad) {
+  testCase(testAdagrad);
+}
+
+void testAdaDelta(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM1, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_LEARNING_RATE, size, useGpu);
+
+  real rou = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real epsilon = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real learningRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real momentum = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real decayRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+
+  EXPRESSION_PERFORMANCE(AdaDeltaParameterOptimizer(bufs1,
+    rou, epsilon, learningRate, momentum, decayRate));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *bufs2[PARAMETER_MOMENTUM];
+  BaseMatrix& accum = *bufs2[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& accum_update = *bufs2[PARAMETER_GRADIENT_SQURESUM1];
+  BaseMatrix& lr = *bufs2[PARAMETER_LEARNING_RATE];
+
+  EXPRESSION_PERFORMANCE(adadeltaApply(value, grad, mom, accum, accum_update,
+    lr, rou, epsilon, learningRate, momentum, decayRate));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM], bufs2[PARAMETER_MOMENTUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_GRADIENT_SQURESUM],
+                  bufs2[PARAMETER_GRADIENT_SQURESUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_GRADIENT_SQURESUM1],
+                  bufs2[PARAMETER_GRADIENT_SQURESUM1]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_LEARNING_RATE],
+                  bufs2[PARAMETER_LEARNING_RATE]);
+}
+
+TEST(Training, AdaDelta) {
+  testCase(testAdaDelta);
+}
+
+template<bool isFirstTime>
+void testRMSProp(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM1, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_LEARNING_RATE, size, useGpu);
+
+  /* make sure 'g - f.square()' greater than 0 */
+  bufs1[PARAMETER_GRADIENT_SQURESUM]->add(1.0);
+  bufs2[PARAMETER_GRADIENT_SQURESUM]->copyFrom(
+    *bufs1[PARAMETER_GRADIENT_SQURESUM]);
+
+  real rou = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real epsilon = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real learningRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real momentum = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real decayRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real accumulatedRou = rou;
+
+  EXPRESSION_PERFORMANCE(RMSPropParameterOptimizer(bufs1,
+    accumulatedRou, rou, epsilon, learningRate, momentum, decayRate,
+    isFirstTime));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *bufs2[PARAMETER_MOMENTUM];
+  BaseMatrix& sum = *bufs2[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& sum1 = *bufs2[PARAMETER_GRADIENT_SQURESUM1];
+  BaseMatrix& lr = *bufs2[PARAMETER_LEARNING_RATE];
+
+  EXPRESSION_PERFORMANCE(rmspropApply(value, grad, mom, sum, sum1, lr,
+    accumulatedRou, rou, epsilon, learningRate, momentum, decayRate,
+    isFirstTime));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM], bufs2[PARAMETER_MOMENTUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_GRADIENT_SQURESUM],
+                  bufs2[PARAMETER_GRADIENT_SQURESUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_GRADIENT_SQURESUM1],
+                  bufs2[PARAMETER_GRADIENT_SQURESUM1]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_LEARNING_RATE],
+                  bufs2[PARAMETER_LEARNING_RATE]);
+}
+
+TEST(Training, RMSProp) {
+  testCase(testRMSProp<true>);
+  testCase(testRMSProp<false>);
+}
+
+template<bool isFirstTime>
+void testDecayedAdagrad(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT_SQURESUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_LEARNING_RATE, size, useGpu);
+
+  real rou = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real epsilon = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real learningRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real momentum = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real decayRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real accumulatedRou = rou;
+
+  if (isFirstTime) {
+    bufs1[PARAMETER_GRADIENT_SQURESUM]->zeroMem();
+    bufs2[PARAMETER_GRADIENT_SQURESUM]->zeroMem();
+  }
+
+  EXPRESSION_PERFORMANCE(DecayedAdagradParameterOptimizer(bufs1,
+    accumulatedRou, rou, epsilon, learningRate, momentum, decayRate,
+    isFirstTime));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *bufs2[PARAMETER_MOMENTUM];
+  BaseMatrix& sum = *bufs2[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& lr = *bufs2[PARAMETER_LEARNING_RATE];
+
+  EXPRESSION_PERFORMANCE(decayedAdagradApply(value, grad, mom, sum, lr,
+    accumulatedRou, rou, epsilon, learningRate, momentum, decayRate,
+    isFirstTime));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM], bufs2[PARAMETER_MOMENTUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_GRADIENT_SQURESUM],
+                  bufs2[PARAMETER_GRADIENT_SQURESUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_LEARNING_RATE],
+                  bufs2[PARAMETER_LEARNING_RATE]);
+}
+
+TEST(Training, DecayedAdagrad) {
+  testCase(testDecayedAdagrad<false>);
+  testCase(testDecayedAdagrad<true>);
+}
+
+void testAdam(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_SECOND_MOMENTUM, size, useGpu);
+
+  real beta1 = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real beta2 = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real beta1_power = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real beta2_power = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real epsilon = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real learningRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+
+  EXPRESSION_PERFORMANCE(AdamParameterOptimizer(bufs1,
+    beta1, beta2, beta1_power, beta2_power, epsilon, learningRate));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *bufs2[PARAMETER_MOMENTUM];
+  BaseMatrix& v = *bufs2[PARAMETER_SECOND_MOMENTUM];
+
+  EXPRESSION_PERFORMANCE(adamApply(value, grad, mom, v,
+    beta1, beta2, beta1_power, beta2_power, epsilon, learningRate));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM], bufs2[PARAMETER_MOMENTUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_SECOND_MOMENTUM],
+                  bufs2[PARAMETER_SECOND_MOMENTUM]);
+}
+
+TEST(Training, Adam) {
+  testCase(testAdam);
+}
+
+void testAdamax(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_WEIGHTED_INFINITY_NORM, size, useGpu);
+
+  real beta1 = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real beta2 = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real alpha = (real)rand() / (real)RAND_MAX;  // NOLINT
+  int64_t step = 2;
+
+  EXPRESSION_PERFORMANCE(AdamaxParameterOptimizer(bufs1,
+    beta1, beta2, step, alpha));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *bufs2[PARAMETER_MOMENTUM];
+  BaseMatrix& u = *bufs2[PARAMETER_WEIGHTED_INFINITY_NORM];
+
+  EXPRESSION_PERFORMANCE(adamaxApply(value, grad, mom, u,
+    beta1, beta2, step, alpha));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM], bufs2[PARAMETER_MOMENTUM]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_WEIGHTED_INFINITY_NORM],
+                  bufs2[PARAMETER_WEIGHTED_INFINITY_NORM]);
+}
+
+TEST(Training, Adamax) {
+#ifndef PADDLE_TYPE_DOUBLE
+  SetMaxDiff diff(1e-4);
+#endif
+  testCase(testAdamax);
+}
+
+void testSparseMomentum(size_t size, bool useGpu) {
+  VectorPtr bufs1[NUM_PARAMETER_TYPES];
+  VectorPtr bufs2[NUM_PARAMETER_TYPES];
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_VALUE, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_GRADIENT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM_UT, size, useGpu);
+  INIT_VECTOR(bufs1, bufs2, PARAMETER_MOMENTUM_VT, size, useGpu);
+
+  real alpha = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real beta = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real gamma = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real tau = (real)rand() / (real)RAND_MAX;  // NOLINT
+  real learningRate = (real)rand() / (real)RAND_MAX;  // NOLINT
+
+  EXPRESSION_PERFORMANCE(SparseMomentumParameterOptimizer(bufs1,
+    alpha, beta, gamma, tau, learningRate));
+
+  BaseMatrix& value = *bufs2[PARAMETER_VALUE];
+  BaseMatrix& grad = *bufs2[PARAMETER_GRADIENT];
+  BaseMatrix& momU = *bufs2[PARAMETER_MOMENTUM_UT];
+  BaseMatrix& momV = *bufs2[PARAMETER_MOMENTUM_VT];
+
+  EXPRESSION_PERFORMANCE(sparseMomentumApply(value, grad, momU, momV,
+    alpha, beta, gamma, tau, learningRate));
+
+  CHECK_VECTORPTR(bufs1[PARAMETER_VALUE], bufs2[PARAMETER_VALUE]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM_UT],
+                  bufs2[PARAMETER_MOMENTUM_UT]);
+  CHECK_VECTORPTR(bufs1[PARAMETER_MOMENTUM_VT],
+                  bufs2[PARAMETER_MOMENTUM_VT]);
+}
+
+TEST(Training, SparseMomentum) {
+  testCase(testSparseMomentum);
+}
+
+int main(int argc, char** argv) {
+  testing::InitGoogleTest(&argc, argv);
+  initMain(argc, argv);
+  hl_start();
+  hl_init(FLAGS_gpu_id);
+  return RUN_ALL_TESTS();
+}
+

paddle/math/tests/test_matrixCompare.cpp

@@ -381,8 +381,8 @@ void testMatrixSqrt(int height, int width) {
 
   cpuA->randomizeUniform();
   gpuA->copyFrom(*cpuA);
-  cpuA->sqrt();
-  gpuA->sqrt();
+  cpuA->sqrt2();
+  gpuA->sqrt2();
 
   MatrixPtr outputCheck = std::make_shared<CpuMatrix>(height, width);
   outputCheck->copyFrom(*gpuA);

paddle/parameter/FirstOrderOptimizer.cpp

@@ -15,7 +15,7 @@ limitations under the License. */
 
 #include "paddle/utils/Util.h"
 #include "paddle/utils/Flags.h"
-
+#include "paddle/math/TrainingAlgorithmOp.h"
 #include "FirstOrderOptimizer.h"
 
 #include <cmath>
@@ -113,17 +113,20 @@ void SparseMomentumParameterOptimizer::finishBatch() {
 void AdagradParameterOptimizer::update(const VectorPtr vecs[],
                                        const ParameterConfig& config,
                                        size_t sparseId) const {
-  vecs[PARAMETER_GRADIENT_SQURESUM1]->addSquare(*vecs[PARAMETER_GRADIENT],
-                                                1.0f);
-  vecs[PARAMETER_LEARNING_RATE]->add(*vecs[PARAMETER_GRADIENT_SQURESUM],
-                                     *vecs[PARAMETER_GRADIENT_SQURESUM1]);
-  vecs[PARAMETER_LEARNING_RATE]->add(optConfig_.ada_epsilon());
-  vecs[PARAMETER_LEARNING_RATE]->invSqrt(*vecs[PARAMETER_LEARNING_RATE]);
-
-  vecs[PARAMETER_VALUE]->sgdUpdate(
-      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
-      *vecs[PARAMETER_LEARNING_RATE], learningRate_ * config.learning_rate(),
-      config.momentum(), applyDecay_ ? config.decay_rate() : 0);
+  BaseMatrix& value = *vecs[PARAMETER_VALUE];
+  BaseMatrix& grad = *vecs[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *vecs[PARAMETER_MOMENTUM];
+  BaseMatrix& accum_buffer = *vecs[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& accum = *vecs[PARAMETER_GRADIENT_SQURESUM1];
+  BaseMatrix& lr = *vecs[PARAMETER_LEARNING_RATE];
+
+  real epsilon = optConfig_.ada_epsilon();
+  real learningRate = learningRate_ * config.learning_rate();
+  real momentum = config.momentum();
+  real decayRate = applyDecay_ ? config.decay_rate() : 0;
+
+  adagradApply(value, grad, mom, accum_buffer, accum, lr,
+    epsilon, learningRate, momentum, decayRate);
 }
 
 ParameterOptimizer::TraverseCallback
@@ -147,32 +150,32 @@ void AdaDeltaParameterOptimizer::update(const VectorPtr vecs[],
                                         const ParameterConfig& config,
                                         size_t sparseId) const {
   CHECK(sparseId == -1LU) << "Sparse update is not supported";
-  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
-  vecs[PARAMETER_GRADIENT_SQURESUM]->decayAddSquare(*vecs[PARAMETER_GRADIENT],
-                                                    rou_, 1.0f - rou_);
-
-  // learn_rate = sqrt( ( E(dx_{t-1}^2) + epsilon ) / ( E(g_t^2) + epsilon ) )
-  vecs[PARAMETER_LEARNING_RATE]->dotDiv(*vecs[PARAMETER_GRADIENT_SQURESUM1],
-                                        *vecs[PARAMETER_GRADIENT_SQURESUM],
-                                        epsilon_, epsilon_);
-  vecs[PARAMETER_LEARNING_RATE]->sqrt();
-
-  // E(dx_t^2) = \rou * E(dx_{t-1}^2) + (1-\rou) * (-g*learn_rate)^2
-  vecs[PARAMETER_GRADIENT_SQURESUM1]->decayAddSquareMul(
-      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_LEARNING_RATE], rou_,
-      1.0f - rou_);
-
-  vecs[PARAMETER_VALUE]->sgdUpdate(
-      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
-      *vecs[PARAMETER_LEARNING_RATE], learningRate_ * config.learning_rate(),
-      config.momentum(), applyDecay_ ? config.decay_rate() : 0);
+  BaseMatrix& value = *vecs[PARAMETER_VALUE];
+  BaseMatrix& grad = *vecs[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *vecs[PARAMETER_MOMENTUM];
+  BaseMatrix& accum = *vecs[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& accum_update = *vecs[PARAMETER_GRADIENT_SQURESUM1];
+  BaseMatrix& lr = *vecs[PARAMETER_LEARNING_RATE];
+
+  real learningRate = learningRate_ * config.learning_rate();
+  real momentum = config.momentum();
+  real decayRate = applyDecay_ ? config.decay_rate() : 0;
+
+  adadeltaApply(value, grad, mom, accum, accum_update, lr,
+    rou_, epsilon_, learningRate, momentum, decayRate);
 }
 
 void RMSPropParameterOptimizer::update(const VectorPtr vecs[],
                                        const ParameterConfig& config,
                                        size_t sparseId) const {
-  real accumulatedRou = rou_;
+  BaseMatrix& value = *vecs[PARAMETER_VALUE];
+  BaseMatrix& grad = *vecs[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *vecs[PARAMETER_MOMENTUM];
+  BaseMatrix& sum = *vecs[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& sum1 = *vecs[PARAMETER_GRADIENT_SQURESUM1];
+  BaseMatrix& lr = *vecs[PARAMETER_LEARNING_RATE];
 
+  real accumulatedRou = rou_;
   bool firstTime = timer_ == 0;
   if (sparseId != -1LU) {
     CHECK_LT(sparseId, t0Vec_.size());
@@ -181,37 +184,26 @@ void RMSPropParameterOptimizer::update(const VectorPtr vecs[],
     t0Vec_[sparseId] = timer_ + 1;
   }
 
-  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
-  // For the first time update, make the sum be the current square
-  // so that the initial estimation of E(g_t^2) will not be too small.
-  vecs[PARAMETER_GRADIENT_SQURESUM]->decayAddSquare(
-      *vecs[PARAMETER_GRADIENT], accumulatedRou,
-      firstTime ? 1.0f : 1.0f - rou_);
-
-  // E(g_t) = \rou * E(g_{t-1}) + (1-\rou) * g
-  vecs[PARAMETER_GRADIENT_SQURESUM1]->add(*vecs[PARAMETER_GRADIENT],
-                                          accumulatedRou, 1.0f - rou_);
-
-  // learn_rate = 1/sqrt( ( E(g_t^2) - (E(g_t))^2 + epsilon )
-  // Basiclly if the sign of the gradient changes more often,
-  // the learning rate will be decreased.
-  vecs[PARAMETER_LEARNING_RATE]->assign(*vecs[PARAMETER_GRADIENT_SQURESUM]);
-  vecs[PARAMETER_LEARNING_RATE]->addSquare(*vecs[PARAMETER_GRADIENT_SQURESUM1],
-                                           -1.0f);
-  vecs[PARAMETER_LEARNING_RATE]->add(optConfig_.ada_epsilon());
-  vecs[PARAMETER_LEARNING_RATE]->invSqrt(*vecs[PARAMETER_LEARNING_RATE]);
+  real epsilon = optConfig_.ada_epsilon();
+  real learningRate = learningRate_ * config.learning_rate();
+  real momentum = config.momentum();
+  real decayRate = applyDecay_ ? config.decay_rate() : 0;
 
-  vecs[PARAMETER_VALUE]->sgdUpdate(
-      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
-      *vecs[PARAMETER_LEARNING_RATE], learningRate_ * config.learning_rate(),
-      config.momentum(), applyDecay_ ? config.decay_rate() : 0);
+  rmspropApply(value, grad, mom, sum, sum1, lr,
+    accumulatedRou, rou_, epsilon, learningRate, momentum, decayRate,
+    firstTime);
 }
 
 void DecayedAdagradParameterOptimizer::update(const VectorPtr vecs[],
                                               const ParameterConfig& config,
                                               size_t sparseId) const {
-  real accumulatedRou = rou_;
+  BaseMatrix& value = *vecs[PARAMETER_VALUE];
+  BaseMatrix& grad = *vecs[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *vecs[PARAMETER_MOMENTUM];
+  BaseMatrix& sum = *vecs[PARAMETER_GRADIENT_SQURESUM];
+  BaseMatrix& lr = *vecs[PARAMETER_LEARNING_RATE];
 
+  real accumulatedRou = rou_;
   bool firstTime = timer_ == 0;
   if (sparseId != -1LU) {
     CHECK_LT(sparseId, t0Vec_.size());
@@ -220,77 +212,48 @@ void DecayedAdagradParameterOptimizer::update(const VectorPtr vecs[],
     t0Vec_[sparseId] = timer_ + 1;
   }
 
-  // E(g_t^2) = \rou * E(g_{t-1}^2) + (1-\rou) * g^2
-  // For the first time update, make the sum be the current square
-  // so that the initial estimation of E(g_t^2) will not be too small.
-  vecs[PARAMETER_GRADIENT_SQURESUM]->decayAddSquare(
-      *vecs[PARAMETER_GRADIENT], accumulatedRou,
-      firstTime ? 1.0f : 1.0f - rou_);
-
-  // learn_rate = 1/sqrt( ( E(g_t^2) + epsilon )
-  // Basiclly if the bigger the magnitude gradient is,
-  // the smaller the learning rate will be.
-  vecs[PARAMETER_LEARNING_RATE]->assign(optConfig_.ada_epsilon());
-  vecs[PARAMETER_LEARNING_RATE]->add(*vecs[PARAMETER_GRADIENT_SQURESUM]);
-  vecs[PARAMETER_LEARNING_RATE]->invSqrt(*vecs[PARAMETER_LEARNING_RATE]);
+  real epsilon = optConfig_.ada_epsilon();
+  real learningRate = learningRate_ * config.learning_rate();
+  real momentum = config.momentum();
+  real decayRate = applyDecay_ ? config.decay_rate() : 0;
 
-  vecs[PARAMETER_VALUE]->sgdUpdate(
-      *vecs[PARAMETER_GRADIENT], *vecs[PARAMETER_MOMENTUM],
-      *vecs[PARAMETER_LEARNING_RATE], learningRate_ * config.learning_rate(),
-      config.momentum(), applyDecay_ ? config.decay_rate() : 0);
+  decayedAdagradApply(value, grad, mom, sum, lr,
+    accumulatedRou, rou_, epsilon, learningRate, momentum, decayRate,
+    firstTime);
 }
 
 void AdamParameterOptimizer::update(const VectorPtr vecs[],
                                     const ParameterConfig& config,
                                     size_t sparseId) const {
   CHECK(sparseId == -1UL) << "Sparse update is not supported";
-  Vector* m = vecs[PARAMETER_MOMENTUM].get();
-  Vector* g = vecs[PARAMETER_GRADIENT].get();
-  Vector* v = vecs[PARAMETER_SECOND_MOMENTUM].get();
-  Vector* theta = vecs[PARAMETER_VALUE].get();
-
-  // m_t = \beta_1 * m_{t-1} + (1-\beta_1)* g_t;
-  m->add(*g, beta1_, 1 - beta1_);
-
-  // v_t = \beta_2 * v_{t-1} + (1-\beta_2)* g_{t-1}^2
-  g->square();
-  v->add(*g, beta2_, 1 - beta2_);
-
-  // tmp = m_t / ( \sqrt{v_t} + \epsilon )
-  // \theta_t = \theta_{t-1} - \alpha * \sqrt(1-\beta_2^t) / (1-\beta_1^t) * tmp
-  g->sqrt(*v);
-  g->dotDiv(*m, *g, 0., epsilon_);
-  real alpha = config.learning_rate() * learningRate_;
-  alpha = alpha * std::sqrt(1 - std::pow(beta2_, step_)) /
-          (1 - std::pow(beta1_, step_));
-  theta->add(*theta, 1.0, *g, -alpha);
+  real beta1_power = std::pow(beta1_, step_);
+  real beta2_power = std::pow(beta2_, step_);
+  real learningRate = config.learning_rate() * learningRate_;
+
+  BaseMatrix& value = *vecs[PARAMETER_VALUE];
+  BaseMatrix& grad = *vecs[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *vecs[PARAMETER_MOMENTUM];
+  BaseMatrix& v = *vecs[PARAMETER_SECOND_MOMENTUM];
+
+  adamApply(value, grad, mom, v,
+    beta1_, beta2_, beta1_power, beta2_power, epsilon_, learningRate);
 }
 
 void AdamaxParameterOptimizer::update(const VectorPtr vecs[],
                                       const ParameterConfig& config,
                                       size_t sparseId) const {
   CHECK(sparseId == -1UL) << "Sparse update is not supported";
-  Vector* m = vecs[PARAMETER_MOMENTUM].get();
-  Vector* g = vecs[PARAMETER_GRADIENT].get();
-  Vector* u = vecs[PARAMETER_WEIGHTED_INFINITY_NORM].get();
-  Vector* theta = vecs[PARAMETER_VALUE].get();
-
-  // m_t = \beta_1 * m_{t-1} + (1-\beta_1)* g_t;
-  m->add(*g, beta1_, 1 - beta1_);
+  real learningRate = config.learning_rate() * learningRate_;
 
-  // u_t = max(\beta_2*u_{t-1}, abs(g_t))
-  u->mulScalar(beta2_);
-  g->abs();
-  u->max(*u, *g);
+  BaseMatrix& value = *vecs[PARAMETER_VALUE];
+  BaseMatrix& grad = *vecs[PARAMETER_GRADIENT];
+  BaseMatrix& mom = *vecs[PARAMETER_MOMENTUM];
+  BaseMatrix& u = *vecs[PARAMETER_WEIGHTED_INFINITY_NORM];
 
-  // \theta_t = \theta_{t-1} - (\alpha/(1-\beta_1^t))*m_t/u_t
-  g->dotDiv(*m, *u);
-  real learningRate = config.learning_rate() * learningRate_;
-  learningRate /= (1 - std::pow(beta1_, step_));
-  theta->add(*theta, 1.0, *g, -learningRate);
+  adamaxApply(value, grad, mom, u,
+    beta1_, beta2_, step_, learningRate);
 }
 
-
 void OptimizerWithGradientClipping::update(const VectorPtr vecs[],
                                            const ParameterConfig& config,
                                            size_t sparseId) const {