fix undefine error on gpu

paddle/math/MathFunctions.cpp

@@ -307,6 +307,29 @@ void vAdd(const int n, const T* a, const T* b, T* r) {
                                                      n);
 }
 
+DEFINE_MATRIX_BINARY_OP(vInvSqrt, b = 1.0f / std::sqrt(a));
+template <class T>
+void vInvSqrt(const int n, const T* a, T* r) {
+  hl_cpu_apply_binary_op<T, binary::vInvSqrt<T>, 0, 0>(
+      binary::vInvSqrt<T>(), const_cast<T*>(a), r, 1, n, n, n);
+}
+
+DEFINE_MATRIX_BINARY_OP(vLog1p, b = std::log(1.0f + a));
+template <class T>
+void vLog1p(const int n, const T* a, T* r) {
+  hl_cpu_apply_binary_op<T, binary::vLog1p<T>, 0, 0>(
+      binary::vLog1p<T>(), const_cast<T*>(a), r, 1, n, n, n);
+}
+
+DEFINE_MATRIX_BINARY_OP(vTanh, T tmp = -2.0 * a;
+                        tmp = (tmp > EXP_MAX_INPUT) ? EXP_MAX_INPUT : tmp;
+                        b = 2.0 / (1.0 + std::exp(tmp)) - 1.0);
+template <class T>
+void vTanh(const int n, const T* a, T* r) {
+  hl_cpu_apply_binary_op<T, binary::vTanh<T>, 0, 0>(
+      binary::vTanh<T>(), const_cast<T*>(a), r, 1, n, n, n);
+}
+
 template void vExp(const int n, const float* a, float* r);
 template void vExp(const int n, const double* a, double* r);
 template void vLog(const int n, const float* a, float* r);
@@ -315,6 +338,11 @@ template void vPow(const int n, const float* a, const float b, float* r);
 template void vPow(const int n, const double* a, const double b, double* r);
 template void vAdd(const int n, const float* a, const float* b, float* r);
 template void vAdd(const int n, const double* a, const double* b, double* r);
-
+template void vInvSqrt(const int n, const double* a, double* r);
+template void vInvSqrt(const int n, const float* a, float* r);
+template void vLog1p(const int n, const float* a, float* r);
+template void vLog1p(const int n, const double* a, double* r);
+template void vTanh(const int n, const float* a, float* r);
+template void vTanh(const int n, const double* a, double* r);
 #endif
 }  // namespace paddle