- adds the kernel CUDA file for SparseMatrix

mex/sources/bytecode/SparseMatrix_kernel.cu

+/*
+ * Copyright (C) 2007-2012 Dynare Team
+ *
+ * This file is part of Dynare.
+ *
+ * Dynare is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Dynare is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef SPARMATRIX_KERNEL
+#define SPARMATRIX_KERNEL
+
+// Kernel definition of vector division
+__global__ void
+VecDiv(double* A, double* B, double* C, int n)
+{
+  int i = blockIdx.x * 1024 + threadIdx.x;
+  if (i < n)
+    C[i] = (B[i] != 0.0 ? A[i] / B[i] : A[i]);
+}
+
+__global__ void
+VecAdd(double* res, double* r, double alpha, double* x, int n)
+{
+  int i = blockIdx.x * 1024 + threadIdx.x;
+  if (i < n)
+    res[i] = r[i] + alpha * x[i];
+}
+
+__global__ void
+VecInc(double* res, double alpha, double* x, int n)
+{
+  int i = blockIdx.x * 1024 + threadIdx.x;
+  if (i < n)
+    res[i] += alpha * x[i];
+}
+
+
+__global__ void
+update_x(double* x, double alpha, double* y, double omega, double *z)
+{
+  int i = threadIdx.x;
+  x[i] += alpha * y[i] + omega * z[i];
+}
+
+__global__ void
+Get_LU_dim(int *n, int* A_tild_i, int *A_tild_p, int *nnz_l, int *nnz_u)
+{
+  nnz_u[0] = 0;
+  nnz_l[0] = 0;
+  for (int i = 0; i < n[0]; i++)
+    {
+      for (int j = A_tild_p[i]; j < A_tild_p[i+1]; j++)
+        {
+          if (A_tild_i[j] < i)
+            nnz_l[0]++;
+          else if (A_tild_i[j] == i)
+            {
+              nnz_u[0]++;
+              //nnz_l[0]++;
+            }
+          else
+            nnz_u[0]++;
+        }
+    }
+}
+
+__global__ void
+Get_LU1_dim(int* n, int *nnz_l, int *nnz_u)
+{
+  nnz_u[0] = 3+n[0];
+  nnz_l[0] = 1+n[0];
+}
+
+
+__global__ void
+Get_L_and_U(int *n, double* A_tild_x, int* A_tild_i, int *A_tild_p, double* Lx, int* Li, int *Lp, double* Ux, int* Ui, int* Up)
+{
+  int nnz_u = 0, nnz_l = 0;
+  Lp[0] = 0;
+  Up[0] = 0;
+  for (int i = 0; i < n[0]; i++)
+    {
+      for (int j = A_tild_p[i]; j < A_tild_p[i+1]; j++)
+        {
+          if (A_tild_i[j] < i)
+            {
+              Lx[nnz_l] = A_tild_x[j];
+              Li[nnz_l] = A_tild_i[j];
+              nnz_l++;
+            }
+          else if (A_tild_i[j] == i)
+            {
+              Ux[nnz_u] = A_tild_x[j];
+              Lx[nnz_l] = 1.0;
+              Li[nnz_l] = Ui[nnz_u] = A_tild_i[j];
+              nnz_u++;
+              //nnz_l++;
+            }
+          else
+            {
+              Ux[nnz_u] = A_tild_x[j];
+              Ui[nnz_u] = A_tild_i[j];
+              nnz_u++;
+            }
+        }
+      Lp[i+1] = nnz_l;
+      Up[i+1] = nnz_u;
+    }
+}
+#endif