Actual source code: baijfact10.c

  1: #define PETSCMAT_DLL

  3: /*
  4:     Factorization code for BAIJ format. 
  5: */
 6:  #include ../src/mat/impls/baij/seq/baij.h
 7:  #include ../src/inline/ilu.h

  9: /*
 10:       Version for when blocks are 5 by 5 Using natural ordering
 11: */
 14: PetscErrorCode MatLUFactorNumeric_SeqBAIJ_5_NaturalOrdering(Mat C,Mat A,const MatFactorInfo *info)
 15: {
 16:   Mat_SeqBAIJ    *a = (Mat_SeqBAIJ*)A->data,*b = (Mat_SeqBAIJ *)C->data;
 18:   PetscInt       i,j,n = a->mbs,*bi = b->i,*bj = b->j;
 19:   PetscInt       *ajtmpold,*ajtmp,nz,row;
 20:   PetscInt       *diag_offset = b->diag,*ai=a->i,*aj=a->j,*pj;
 21:   MatScalar      *pv,*v,*rtmp,*pc,*w,*x;
 22:   MatScalar      x1,x2,x3,x4,x5,x6,x7,x8,x9,x10,x11,x12,x13,x14,x15;
 23:   MatScalar      x16,x17,x18,x19,x20,x21,x22,x23,x24,x25;
 24:   MatScalar      p1,p2,p3,p4,p5,p6,p7,p8,p9,p10,p11,p12,p13,p14,p15;
 25:   MatScalar      p16,p17,p18,p19,p20,p21,p22,p23,p24,p25;
 26:   MatScalar      m1,m2,m3,m4,m5,m6,m7,m8,m9,m10,m11,m12,m13,m14,m15;
 27:   MatScalar      m16,m17,m18,m19,m20,m21,m22,m23,m24,m25;
 28:   MatScalar      *ba = b->a,*aa = a->a;
 29:   PetscReal      shift = info->shiftinblocks;

 32:   PetscMalloc(25*(n+1)*sizeof(MatScalar),&rtmp);
 33:   for (i=0; i<n; i++) {
 34:     nz    = bi[i+1] - bi[i];
 35:     ajtmp = bj + bi[i];
 36:     for  (j=0; j<nz; j++) {
 37:       x = rtmp+25*ajtmp[j];
 38:       x[0]  = x[1]  = x[2]  = x[3]  = x[4]  = x[5]  = x[6] = x[7] = x[8] = x[9] = 0.0;
 39:       x[10] = x[11] = x[12] = x[13] = x[14] = x[15] = 0.0;
 40:       x[16] = x[17] = x[18] = x[19] = x[20] = x[21] = x[22] = x[23] = x[24] = 0.0;
 41:     }
 42:     /* load in initial (unfactored row) */
 43:     nz       = ai[i+1] - ai[i];
 44:     ajtmpold = aj + ai[i];
 45:     v        = aa + 25*ai[i];
 46:     for (j=0; j<nz; j++) {
 47:       x    = rtmp+25*ajtmpold[j];
 48:       x[0]  = v[0];  x[1]  = v[1];  x[2]  = v[2];  x[3]  = v[3];
 49:       x[4]  = v[4];  x[5]  = v[5];  x[6]  = v[6];  x[7]  = v[7];  x[8]  = v[8];
 50:       x[9]  = v[9];  x[10] = v[10]; x[11] = v[11]; x[12] = v[12]; x[13] = v[13];
 51:       x[14] = v[14]; x[15] = v[15]; x[16] = v[16]; x[17] = v[17]; x[18] = v[18];
 52:       x[19] = v[19]; x[20] = v[20]; x[21] = v[21]; x[22] = v[22]; x[23] = v[23];
 53:       x[24] = v[24];
 54:       v    += 25;
 55:     }
 56:     row = *ajtmp++;
 57:     while (row < i) {
 58:       pc  = rtmp + 25*row;
 59:       p1  = pc[0];  p2  = pc[1];  p3  = pc[2];  p4  = pc[3];
 60:       p5  = pc[4];  p6  = pc[5];  p7  = pc[6];  p8  = pc[7];  p9  = pc[8];
 61:       p10 = pc[9];  p11 = pc[10]; p12 = pc[11]; p13 = pc[12]; p14 = pc[13];
 62:       p15 = pc[14]; p16 = pc[15]; p17 = pc[16]; p18 = pc[17];
 63:       p19 = pc[18]; p20 = pc[19]; p21 = pc[20]; p22 = pc[21]; p23 = pc[22];
 64:       p24 = pc[23]; p25 = pc[24];
 65:       if (p1 != 0.0 || p2 != 0.0 || p3 != 0.0 || p4 != 0.0 || p5 != 0.0 ||
 66:           p6 != 0.0 || p7 != 0.0 || p8 != 0.0 || p9 != 0.0 || p10 != 0.0 ||
 67:           p11 != 0.0 || p12 != 0.0 || p13 != 0.0 || p14 != 0.0 || p15 != 0.0
 68:           || p16 != 0.0 || p17 != 0.0 || p18 != 0.0 || p19 != 0.0 || p20 != 0.0
 69:           || p21 != 0.0 || p22 != 0.0 || p23 != 0.0 || p24 != 0.0 || p25 != 0.0) {
 70:         pv = ba + 25*diag_offset[row];
 71:         pj = bj + diag_offset[row] + 1;
 72:         x1  = pv[0];  x2  = pv[1];  x3  = pv[2];  x4  = pv[3];
 73:         x5  = pv[4];  x6  = pv[5];  x7  = pv[6];  x8  = pv[7];  x9  = pv[8];
 74:         x10 = pv[9];  x11 = pv[10]; x12 = pv[11]; x13 = pv[12]; x14 = pv[13];
 75:         x15 = pv[14]; x16 = pv[15]; x17 = pv[16]; x18 = pv[17]; x19 = pv[18];
 76:         x20 = pv[19]; x21 = pv[20]; x22 = pv[21]; x23 = pv[22]; x24 = pv[23];
 77:         x25 = pv[24];
 78:         pc[0] = m1 = p1*x1 + p6*x2  + p11*x3 + p16*x4 + p21*x5;
 79:         pc[1] = m2 = p2*x1 + p7*x2  + p12*x3 + p17*x4 + p22*x5;
 80:         pc[2] = m3 = p3*x1 + p8*x2  + p13*x3 + p18*x4 + p23*x5;
 81:         pc[3] = m4 = p4*x1 + p9*x2  + p14*x3 + p19*x4 + p24*x5;
 82:         pc[4] = m5 = p5*x1 + p10*x2 + p15*x3 + p20*x4 + p25*x5;

 84:         pc[5]  = m6  = p1*x6 + p6*x7  + p11*x8 + p16*x9 + p21*x10;
 85:         pc[6]  = m7  = p2*x6 + p7*x7  + p12*x8 + p17*x9 + p22*x10;
 86:         pc[7]  = m8  = p3*x6 + p8*x7  + p13*x8 + p18*x9 + p23*x10;
 87:         pc[8]  = m9  = p4*x6 + p9*x7  + p14*x8 + p19*x9 + p24*x10;
 88:         pc[9]  = m10 = p5*x6 + p10*x7 + p15*x8 + p20*x9 + p25*x10;

 90:         pc[10] = m11 = p1*x11 + p6*x12  + p11*x13 + p16*x14 + p21*x15;
 91:         pc[11] = m12 = p2*x11 + p7*x12  + p12*x13 + p17*x14 + p22*x15;
 92:         pc[12] = m13 = p3*x11 + p8*x12  + p13*x13 + p18*x14 + p23*x15;
 93:         pc[13] = m14 = p4*x11 + p9*x12  + p14*x13 + p19*x14 + p24*x15;
 94:         pc[14] = m15 = p5*x11 + p10*x12 + p15*x13 + p20*x14 + p25*x15;

 96:         pc[15] = m16 = p1*x16 + p6*x17  + p11*x18 + p16*x19 + p21*x20;
 97:         pc[16] = m17 = p2*x16 + p7*x17  + p12*x18 + p17*x19 + p22*x20;
 98:         pc[17] = m18 = p3*x16 + p8*x17  + p13*x18 + p18*x19 + p23*x20;
 99:         pc[18] = m19 = p4*x16 + p9*x17  + p14*x18 + p19*x19 + p24*x20;
100:         pc[19] = m20 = p5*x16 + p10*x17 + p15*x18 + p20*x19 + p25*x20;

102:         pc[20] = m21 = p1*x21 + p6*x22  + p11*x23 + p16*x24 + p21*x25;
103:         pc[21] = m22 = p2*x21 + p7*x22  + p12*x23 + p17*x24 + p22*x25;
104:         pc[22] = m23 = p3*x21 + p8*x22  + p13*x23 + p18*x24 + p23*x25;
105:         pc[23] = m24 = p4*x21 + p9*x22  + p14*x23 + p19*x24 + p24*x25;
106:         pc[24] = m25 = p5*x21 + p10*x22 + p15*x23 + p20*x24 + p25*x25;

108:         nz = bi[row+1] - diag_offset[row] - 1;
109:         pv += 25;
110:         for (j=0; j<nz; j++) {
111:           x1   = pv[0];  x2  = pv[1];   x3 = pv[2];  x4  = pv[3];
112:           x5   = pv[4];  x6  = pv[5];   x7 = pv[6];  x8  = pv[7]; x9 = pv[8];
113:           x10  = pv[9];  x11 = pv[10]; x12 = pv[11]; x13 = pv[12];
114:           x14  = pv[13]; x15 = pv[14]; x16 = pv[15]; x17 = pv[16]; x18 = pv[17];
115:           x19 = pv[18];  x20 = pv[19]; x21 = pv[20]; x22 = pv[21]; x23 = pv[22];
116:           x24 = pv[23];  x25 = pv[24];
117:           x    = rtmp + 25*pj[j];
118:           x[0] -= m1*x1 + m6*x2   + m11*x3  + m16*x4 + m21*x5;
119:           x[1] -= m2*x1 + m7*x2   + m12*x3  + m17*x4 + m22*x5;
120:           x[2] -= m3*x1 + m8*x2   + m13*x3  + m18*x4 + m23*x5;
121:           x[3] -= m4*x1 + m9*x2   + m14*x3  + m19*x4 + m24*x5;
122:           x[4] -= m5*x1 + m10*x2  + m15*x3  + m20*x4 + m25*x5;

124:           x[5] -= m1*x6 + m6*x7   + m11*x8  + m16*x9 + m21*x10;
125:           x[6] -= m2*x6 + m7*x7   + m12*x8  + m17*x9 + m22*x10;
126:           x[7] -= m3*x6 + m8*x7   + m13*x8  + m18*x9 + m23*x10;
127:           x[8] -= m4*x6 + m9*x7   + m14*x8  + m19*x9 + m24*x10;
128:           x[9] -= m5*x6 + m10*x7  + m15*x8  + m20*x9 + m25*x10;

130:           x[10] -= m1*x11 + m6*x12  + m11*x13 + m16*x14 + m21*x15;
131:           x[11] -= m2*x11 + m7*x12  + m12*x13 + m17*x14 + m22*x15;
132:           x[12] -= m3*x11 + m8*x12  + m13*x13 + m18*x14 + m23*x15;
133:           x[13] -= m4*x11 + m9*x12  + m14*x13 + m19*x14 + m24*x15;
134:           x[14] -= m5*x11 + m10*x12 + m15*x13 + m20*x14 + m25*x15;

136:           x[15] -= m1*x16 + m6*x17  + m11*x18 + m16*x19 + m21*x20;
137:           x[16] -= m2*x16 + m7*x17  + m12*x18 + m17*x19 + m22*x20;
138:           x[17] -= m3*x16 + m8*x17  + m13*x18 + m18*x19 + m23*x20;
139:           x[18] -= m4*x16 + m9*x17  + m14*x18 + m19*x19 + m24*x20;
140:           x[19] -= m5*x16 + m10*x17 + m15*x18 + m20*x19 + m25*x20;

142:           x[20] -= m1*x21 + m6*x22  + m11*x23 + m16*x24 + m21*x25;
143:           x[21] -= m2*x21 + m7*x22  + m12*x23 + m17*x24 + m22*x25;
144:           x[22] -= m3*x21 + m8*x22  + m13*x23 + m18*x24 + m23*x25;
145:           x[23] -= m4*x21 + m9*x22  + m14*x23 + m19*x24 + m24*x25;
146:           x[24] -= m5*x21 + m10*x22 + m15*x23 + m20*x24 + m25*x25;
147:           pv   += 25;
148:         }
149:         PetscLogFlops(250*nz+225);
150:       }
151:       row = *ajtmp++;
152:     }
153:     /* finished row so stick it into b->a */
154:     pv = ba + 25*bi[i];
155:     pj = bj + bi[i];
156:     nz = bi[i+1] - bi[i];
157:     for (j=0; j<nz; j++) {
158:       x      = rtmp+25*pj[j];
159:       pv[0]  = x[0];  pv[1]  = x[1];  pv[2]  = x[2];  pv[3]  = x[3];
160:       pv[4]  = x[4];  pv[5]  = x[5];  pv[6]  = x[6];  pv[7]  = x[7]; pv[8] = x[8];
161:       pv[9]  = x[9];  pv[10] = x[10]; pv[11] = x[11]; pv[12] = x[12];
162:       pv[13] = x[13]; pv[14] = x[14]; pv[15] = x[15]; pv[16] = x[16]; pv[17] = x[17];
163:       pv[18] = x[18]; pv[19] = x[19]; pv[20] = x[20]; pv[21] = x[21]; pv[22] = x[22];
164:       pv[23] = x[23]; pv[24] = x[24];
165:       pv   += 25;
166:     }
167:     /* invert diagonal block */
168:     w = ba + 25*diag_offset[i];
169:     Kernel_A_gets_inverse_A_5(w,shift);
170:   }

172:   PetscFree(rtmp);
173:   C->ops->solve          = MatSolve_SeqBAIJ_5_NaturalOrdering;
174:   C->ops->solvetranspose = MatSolveTranspose_SeqBAIJ_5_NaturalOrdering;
175:   C->assembled = PETSC_TRUE;
176:   PetscLogFlops(1.3333*125*b->mbs); /* from inverting diagonal blocks */
177:   return(0);
178: }