348 lines
12 KiB
C++
348 lines
12 KiB
C++
// Copyright (c) 2010-2022, Lawrence Livermore National Security, LLC. Produced
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// at the Lawrence Livermore National Laboratory. All Rights reserved. See files
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// LICENSE and NOTICE for details. LLNL-CODE-806117.
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//
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// This file is part of the MFEM library. For more information and source code
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// availability visit https://mfem.org.
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//
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// MFEM is free software; you can redistribute it and/or modify it under the
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// terms of the BSD-3 license. We welcome feedback and contributions, see file
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// CONTRIBUTING.md for details.
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#include "fem.hpp"
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#include "../fem/kernels.hpp"
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#include "../general/forall.hpp"
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namespace mfem
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{
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template<int T_D1D = 0, int T_Q1D = 0> static
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void DLFGradAssemble2D(const int vdim, const int ne, const int d, const int q,
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const int *markers, const double *b, const double *g,
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const double *jacobians,
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const double *weights, const Vector &coeff, double *y)
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{
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const auto F = coeff.Read();
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const auto M = Reshape(markers, ne);
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const auto B = Reshape(b, q, d);
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const auto G = Reshape(g, q, d);
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const auto J = Reshape(jacobians, q, q, 2,2, ne);
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const auto W = Reshape(weights, q, q);
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const bool cst = coeff.Size() == vdim*2;
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const auto C = cst ? Reshape(F,2,vdim,1,1,1) : Reshape(F,2,vdim,q,q,ne);
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auto Y = Reshape(y, d,d, vdim, ne);
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MFEM_FORALL_2D(e, ne, q, q, 1,
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{
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if (M(e) == 0) { return; } // ignore
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constexpr int Q = T_Q1D ? T_Q1D : MAX_Q1D;
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constexpr int D = T_D1D ? T_D1D : MAX_D1D;
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MFEM_SHARED double sBGt[2][Q*D];
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MFEM_SHARED double sQQ[2][Q*Q];
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MFEM_SHARED double sDQ[2][D*Q];
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const DeviceMatrix Bt(sBGt[0], q, d);
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const DeviceMatrix Gt(sBGt[1], q, d);
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kernels::internal::LoadBGt<D,Q>(d, q, B, G, sBGt);
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const DeviceMatrix QQ0(sQQ[0], q, q);
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const DeviceMatrix QQ1(sQQ[1], q, q);
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const DeviceMatrix DQ0(sDQ[0], d, q);
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const DeviceMatrix DQ1(sDQ[1], d, q);
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for (int c = 0; c < vdim; ++c)
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{
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const double cst_val0 = C(0,c,0,0,0);
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const double cst_val1 = C(1,c,0,0,0);
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MFEM_FOREACH_THREAD(x,x,q)
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{
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MFEM_FOREACH_THREAD(y,y,q)
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{
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const double w = W(x,y);
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const double J11 = J(x,y,0,0,e);
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const double J21 = J(x,y,1,0,e);
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const double J12 = J(x,y,0,1,e);
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const double J22 = J(x,y,1,1,e);
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const double u = cst ? cst_val0 : C(0,c,x,y,e);
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const double v = cst ? cst_val1 : C(1,c,x,y,e);
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// QQ = w * det(J) * J^{-1} . C = w * adj(J) . { u, v }
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QQ0(y,x) = w * (J22*u - J12*v);
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QQ1(y,x) = w * (J11*v - J21*u);
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}
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}
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MFEM_SYNC_THREAD;
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MFEM_FOREACH_THREAD(qx,x,q)
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{
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MFEM_FOREACH_THREAD(dy,y,d)
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{
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double u = 0.0, v = 0.0;
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for (int qy = 0; qy < q; ++qy)
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{
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u += QQ0(qy,qx) * Bt(qy,dy);
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v += QQ1(qy,qx) * Gt(qy,dy);
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}
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DQ0(dy,qx) = u;
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DQ1(dy,qx) = v;
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}
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}
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MFEM_SYNC_THREAD;
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MFEM_FOREACH_THREAD(dx,x,d)
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{
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MFEM_FOREACH_THREAD(dy,y,d)
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{
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double u = 0.0, v = 0.0;
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for (int qx = 0; qx < q; ++qx)
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{
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u += DQ0(dy,qx) * Gt(qx,dx);
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v += DQ1(dy,qx) * Bt(qx,dx);
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}
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Y(dx,dy,c,e) += u + v;
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}
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}
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MFEM_SYNC_THREAD;
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}
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});
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}
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template<int T_D1D = 0, int T_Q1D = 0> static
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void DLFGradAssemble3D(const int vdim, const int ne, const int d, const int q,
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const int *markers, const double *b, const double *g,
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const double *jacobians,
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const double *weights, const Vector &coeff,
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double *output)
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{
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const auto F = coeff.Read();
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const auto M = Reshape(markers, ne);
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const auto B = Reshape(b, q,d);
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const auto G = Reshape(g, q,d);
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const auto J = Reshape(jacobians, q,q,q, 3,3, ne);
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const auto W = Reshape(weights, q,q,q);
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const bool cst = coeff.Size() == vdim*3;
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const auto C = cst ? Reshape(F,3,vdim,1,1,1,1) : Reshape(F,3,vdim,q,q,q,ne);
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auto Y = Reshape(output, d,d,d, vdim, ne);
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MFEM_FORALL_2D(e, ne, q, q, 1,
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{
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if (M(e) == 0) { return; } // ignore
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constexpr int Q = T_Q1D ? T_Q1D : MAX_Q1D;
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constexpr int D = T_D1D ? T_D1D : MAX_D1D;
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double r_u[D];
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MFEM_SHARED double sBGt[2][Q*D];
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MFEM_SHARED double sQQQ[Q*Q*Q];
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const DeviceMatrix Bt(sBGt[0], q,d), Gt(sBGt[1], q,d);
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kernels::internal::LoadBGt<D,Q>(d,q,B,G,sBGt);
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const DeviceCube QQQ(sQQQ, q,q,q);
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const DeviceCube QQD(sQQQ, q,q,d);
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const DeviceCube QDD(sQQQ, q,d,d);
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for (int c = 0; c < vdim; ++c)
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{
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const double cst_val_0 = C(0,c,0,0,0,0);
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const double cst_val_1 = C(1,c,0,0,0,0);
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const double cst_val_2 = C(2,c,0,0,0,0);
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for (int k = 0; k < 3; ++k)
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{
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for (int z = 0; z < q; ++z)
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{
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MFEM_FOREACH_THREAD(y,y,q)
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{
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MFEM_FOREACH_THREAD(x,x,q)
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{
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const double J11 = J(x,y,z,0,0,e);
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const double J21 = J(x,y,z,1,0,e);
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const double J31 = J(x,y,z,2,0,e);
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const double J12 = J(x,y,z,0,1,e);
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const double J22 = J(x,y,z,1,1,e);
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const double J32 = J(x,y,z,2,1,e);
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const double J13 = J(x,y,z,0,2,e);
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const double J23 = J(x,y,z,1,2,e);
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const double J33 = J(x,y,z,2,2,e);
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const double u = cst ? cst_val_0 : C(0,c,x,y,z,e);
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const double v = cst ? cst_val_1 : C(1,c,x,y,z,e);
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const double w = cst ? cst_val_2 : C(2,c,x,y,z,e);
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if (k == 0)
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{
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const double A11 = (J22 * J33) - (J23 * J32);
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const double A12 = (J32 * J13) - (J12 * J33);
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const double A13 = (J12 * J23) - (J22 * J13);
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QQQ(z,y,x) = A11*u + A12*v + A13*w;
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}
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if (k == 1)
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{
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const double A21 = (J31 * J23) - (J21 * J33);
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const double A22 = (J11 * J33) - (J13 * J31);
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const double A23 = (J21 * J13) - (J11 * J23);
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QQQ(z,y,x) = A21*u + A22*v + A23*w;
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}
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if (k == 2)
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{
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const double A31 = (J21 * J32) - (J31 * J22);
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const double A32 = (J31 * J12) - (J11 * J32);
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const double A33 = (J11 * J22) - (J12 * J21);
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QQQ(z,y,x) = A31*u + A32*v + A33*w;
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}
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QQQ(z,y,x) *= W(x,y,z);
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}
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}
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MFEM_SYNC_THREAD;
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}
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MFEM_FOREACH_THREAD(qz,x,q)
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{
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MFEM_FOREACH_THREAD(qy,y,q)
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{
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for (int dx = 0; dx < d; ++dx) { r_u[dx] = 0.0; }
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for (int qx = 0; qx < q; ++qx)
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{
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const double r_v = QQQ(qz,qy,qx);
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for (int dx = 0; dx < d; ++dx)
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{
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r_u[dx] += (k == 0 ? Gt(qx,dx) : Bt(qx,dx)) * r_v;
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}
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}
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for (int dx = 0; dx < d; ++dx) { QQD(qz,qy,dx) = r_u[dx]; }
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}
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}
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MFEM_SYNC_THREAD;
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MFEM_FOREACH_THREAD(qz,y,q)
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{
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MFEM_FOREACH_THREAD(dx,x,d)
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{
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for (int dy = 0; dy < d; ++dy) { r_u[dy] = 0.0; }
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for (int qy = 0; qy < q; ++qy)
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{
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const double r_v = QQD(qz,qy,dx);
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for (int dy = 0; dy < d; ++dy)
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{
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r_u[dy] += (k == 1 ? Gt(qy,dy) : Bt(qy,dy)) * r_v;
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}
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}
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for (int dy = 0; dy < d; ++dy) { QDD(qz,dy,dx) = r_u[dy]; }
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}
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}
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MFEM_SYNC_THREAD;
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MFEM_FOREACH_THREAD(dy,y,d)
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{
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MFEM_FOREACH_THREAD(dx,x,d)
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{
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for (int dz = 0; dz < d; ++dz) { r_u[dz] = 0.0; }
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for (int qz = 0; qz < q; ++qz)
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{
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const double r_v = QDD(qz,dy,dx);
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for (int dz = 0; dz < d; ++dz)
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{
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r_u[dz] += (k == 2 ? Gt(qz,dz) : Bt(qz,dz)) * r_v;
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}
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}
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for (int dz = 0; dz < d; ++dz) { Y(dx,dy,dz,c,e) += r_u[dz]; }
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}
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}
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MFEM_SYNC_THREAD;
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} // dim
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} // vdim
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});
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}
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static void DLFGradAssemble(const FiniteElementSpace &fes,
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const IntegrationRule *ir,
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const Array<int> &markers,
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const Vector &coeff,
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Vector &y)
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{
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Mesh *mesh = fes.GetMesh();
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const int dim = mesh->Dimension();
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const FiniteElement &el = *fes.GetFE(0);
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const MemoryType mt = Device::GetDeviceMemoryType();
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const DofToQuad &maps = el.GetDofToQuad(*ir, DofToQuad::TENSOR);
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const int d = maps.ndof, q = maps.nqpt;
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constexpr int flags = GeometricFactors::JACOBIANS;
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const GeometricFactors *geom = mesh->GetGeometricFactors(*ir, flags, mt);
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decltype(&DLFGradAssemble2D<>) ker =
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dim == 2 ? DLFGradAssemble2D<> : DLFGradAssemble3D<>;
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if (dim==2)
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{
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if (d==1 && q==1) { ker=DLFGradAssemble2D<1,1>; }
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if (d==2 && q==2) { ker=DLFGradAssemble2D<2,2>; }
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if (d==3 && q==3) { ker=DLFGradAssemble2D<3,3>; }
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if (d==4 && q==4) { ker=DLFGradAssemble2D<4,4>; }
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if (d==5 && q==5) { ker=DLFGradAssemble2D<5,5>; }
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if (d==2 && q==3) { ker=DLFGradAssemble2D<2,3>; }
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if (d==3 && q==4) { ker=DLFGradAssemble2D<3,4>; }
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if (d==4 && q==5) { ker=DLFGradAssemble2D<4,5>; }
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if (d==5 && q==6) { ker=DLFGradAssemble2D<5,6>; }
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}
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if (dim==3)
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{
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if (d==1 && q==1) { ker=DLFGradAssemble3D<1,1>; }
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if (d==2 && q==2) { ker=DLFGradAssemble3D<2,2>; }
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if (d==3 && q==3) { ker=DLFGradAssemble3D<3,3>; }
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if (d==4 && q==4) { ker=DLFGradAssemble3D<4,4>; }
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if (d==5 && q==5) { ker=DLFGradAssemble3D<5,5>; }
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if (d==2 && q==3) { ker=DLFGradAssemble3D<2,3>; }
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if (d==3 && q==4) { ker=DLFGradAssemble3D<3,4>; }
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if (d==4 && q==5) { ker=DLFGradAssemble3D<4,5>; }
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if (d==5 && q==6) { ker=DLFGradAssemble3D<5,6>; }
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}
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MFEM_VERIFY(ker, "No kernel ndof " << d << " nqpt " << q);
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const int vdim = fes.GetVDim();
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const int ne = fes.GetMesh()->GetNE();
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const int *M = markers.Read();
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const double *B = maps.B.Read();
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const double *G = maps.G.Read();
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const double *J = geom->J.Read();
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const double *W = ir->GetWeights().Read();
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double *Y = y.ReadWrite();
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ker(vdim, ne, d, q, M, B, G, J, W, coeff, Y);
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}
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void DomainLFGradIntegrator::AssembleDevice(const FiniteElementSpace &fes,
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const Array<int> &markers,
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Vector &b)
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{
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const FiniteElement &fe = *fes.GetFE(0);
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const int qorder = 2 * fe.GetOrder();
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const Geometry::Type gtype = fe.GetGeomType();
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const IntegrationRule *ir = IntRule ? IntRule : &IntRules.Get(gtype, qorder);
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QuadratureSpace qs(*fes.GetMesh(), *ir);
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CoefficientVector coeff(Q, qs, CoefficientStorage::COMPRESSED);
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DLFGradAssemble(fes, ir, markers, coeff, b);
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}
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void VectorDomainLFGradIntegrator::AssembleDevice(const FiniteElementSpace &fes,
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const Array<int> &markers,
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Vector &b)
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{
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const FiniteElement &fe = *fes.GetFE(0);
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const int qorder = 2 * fe.GetOrder();
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const Geometry::Type gtype = fe.GetGeomType();
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const IntegrationRule *ir = IntRule ? IntRule : &IntRules.Get(gtype, qorder);
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QuadratureSpace qs(*fes.GetMesh(), *ir);
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CoefficientVector coeff(Q, qs, CoefficientStorage::COMPRESSED);
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DLFGradAssemble(fes, ir, markers, coeff, b);
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}
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} // namespace mfem
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