1 2 #include <../src/mat/impls/sbaij/seq/sbaij.h> 3 #include <petsc/private/kernels/blockinvert.h> 4 5 /* Version for when blocks are 6 by 6 */ 6 PetscErrorCode MatCholeskyFactorNumeric_SeqSBAIJ_6(Mat C,Mat A,const MatFactorInfo *info) 7 { 8 Mat_SeqSBAIJ *a = (Mat_SeqSBAIJ*)A->data,*b = (Mat_SeqSBAIJ*)C->data; 9 IS perm = b->row; 10 const PetscInt *ai,*aj,*perm_ptr,mbs=a->mbs,*bi=b->i,*bj=b->j; 11 PetscInt i,j,*a2anew,k,k1,jmin,jmax,*jl,*il,vj,nexti,ili; 12 MatScalar *ba = b->a,*aa,*ap,*dk,*uik; 13 MatScalar *u,*d,*w,*wp,u0,u1,u2,u3,u4,u5,u6,u7,u8,u9,u10,u11,u12; 14 MatScalar u13,u14,u15,u16,u17,u18,u19,u20,u21,u22,u23,u24,u25,u26,u27; 15 MatScalar u28,u29,u30,u31,u32,u33,u34,u35; 16 PetscReal shift = info->shiftamount; 17 PetscBool allowzeropivot,zeropivotdetected; 18 19 PetscFunctionBegin; 20 /* initialization */ 21 allowzeropivot = PetscNot(A->erroriffailure); 22 PetscCall(PetscCalloc1(36*mbs,&w)); 23 PetscCall(PetscMalloc2(mbs,&il,mbs,&jl)); 24 il[0] = 0; 25 for (i=0; i<mbs; i++) jl[i] = mbs; 26 27 PetscCall(PetscMalloc2(36,&dk,36,&uik)); 28 PetscCall(ISGetIndices(perm,&perm_ptr)); 29 30 /* check permutation */ 31 if (!a->permute) { 32 ai = a->i; aj = a->j; aa = a->a; 33 } else { 34 ai = a->inew; aj = a->jnew; 35 PetscCall(PetscMalloc1(36*ai[mbs],&aa)); 36 PetscCall(PetscArraycpy(aa,a->a,36*ai[mbs])); 37 PetscCall(PetscMalloc1(ai[mbs],&a2anew)); 38 PetscCall(PetscArraycpy(a2anew,a->a2anew,ai[mbs])); 39 40 for (i=0; i<mbs; i++) { 41 jmin = ai[i]; jmax = ai[i+1]; 42 for (j=jmin; j<jmax; j++) { 43 while (a2anew[j] != j) { 44 k = a2anew[j]; a2anew[j] = a2anew[k]; a2anew[k] = k; 45 for (k1=0; k1<36; k1++) { 46 dk[k1] = aa[k*36+k1]; 47 aa[k*36+k1] = aa[j*36+k1]; 48 aa[j*36+k1] = dk[k1]; 49 } 50 } 51 /* transform columnoriented blocks that lie in the lower triangle to roworiented blocks */ 52 if (i > aj[j]) { 53 /* printf("change orientation, row: %d, col: %d\n",i,aj[j]); */ 54 ap = aa + j*36; /* ptr to the beginning of j-th block of aa */ 55 for (k=0; k<36; k++) dk[k] = ap[k]; /* dk <- j-th block of aa */ 56 for (k=0; k<6; k++) { /* j-th block of aa <- dk^T */ 57 for (k1=0; k1<6; k1++) *ap++ = dk[k + 6*k1]; 58 } 59 } 60 } 61 } 62 PetscCall(PetscFree(a2anew)); 63 } 64 65 /* for each row k */ 66 for (k = 0; k<mbs; k++) { 67 68 /*initialize k-th row with elements nonzero in row perm(k) of A */ 69 jmin = ai[perm_ptr[k]]; jmax = ai[perm_ptr[k]+1]; 70 if (jmin < jmax) { 71 ap = aa + jmin*36; 72 for (j = jmin; j < jmax; j++) { 73 vj = perm_ptr[aj[j]]; /* block col. index */ 74 wp = w + vj*36; 75 for (i=0; i<36; i++) *wp++ = *ap++; 76 } 77 } 78 79 /* modify k-th row by adding in those rows i with U(i,k) != 0 */ 80 PetscCall(PetscArraycpy(dk,w+k*36,36)); 81 i = jl[k]; /* first row to be added to k_th row */ 82 83 while (i < mbs) { 84 nexti = jl[i]; /* next row to be added to k_th row */ 85 86 /* compute multiplier */ 87 ili = il[i]; /* index of first nonzero element in U(i,k:bms-1) */ 88 89 /* uik = -inv(Di)*U_bar(i,k) */ 90 d = ba + i*36; 91 u = ba + ili*36; 92 93 u0 = u[0]; u1 = u[1]; u2 = u[2]; u3 = u[3]; u4 = u[4]; u5 = u[5]; u6 = u[6]; 94 u7 = u[7]; u8 = u[8]; u9 = u[9]; u10 = u[10]; u11 = u[11]; u12 = u[12]; u13 = u[13]; 95 u14 = u[14]; u15 = u[15]; u16 = u[16]; u17 = u[17]; u18 = u[18]; u19 = u[19]; u20 = u[20]; 96 u21 = u[21]; u22 = u[22]; u23 = u[23]; u24 = u[24]; u25 = u[25]; u26 = u[26]; u27 = u[27]; 97 u28 = u[28]; u29 = u[29]; u30 = u[30]; u31 = u[31]; u32 = u[32]; u33 = u[33]; u34 = u[34]; 98 u35 = u[35]; 99 100 uik[0] = -(d[0]*u0 + d[6]*u1 + d[12]*u2 + d[18]*u3 + d[24]*u4 + d[30]*u5); 101 uik[1] = -(d[1]*u0 + d[7]*u1 + d[13]*u2 + d[19]*u3 + d[25]*u4 + d[31]*u5); 102 uik[2] = -(d[2]*u0 + d[8]*u1 + d[14]*u2 + d[20]*u3 + d[26]*u4 + d[32]*u5); 103 uik[3] = -(d[3]*u0 + d[9]*u1 + d[15]*u2 + d[21]*u3 + d[27]*u4 + d[33]*u5); 104 uik[4] = -(d[4]*u0+ d[10]*u1 + d[16]*u2 + d[22]*u3 + d[28]*u4 + d[34]*u5); 105 uik[5] = -(d[5]*u0+ d[11]*u1 + d[17]*u2 + d[23]*u3 + d[29]*u4 + d[35]*u5); 106 107 uik[6] = -(d[0]*u6 + d[6]*u7 + d[12]*u8 + d[18]*u9 + d[24]*u10 + d[30]*u11); 108 uik[7] = -(d[1]*u6 + d[7]*u7 + d[13]*u8 + d[19]*u9 + d[25]*u10 + d[31]*u11); 109 uik[8] = -(d[2]*u6 + d[8]*u7 + d[14]*u8 + d[20]*u9 + d[26]*u10 + d[32]*u11); 110 uik[9] = -(d[3]*u6 + d[9]*u7 + d[15]*u8 + d[21]*u9 + d[27]*u10 + d[33]*u11); 111 uik[10]= -(d[4]*u6+ d[10]*u7 + d[16]*u8 + d[22]*u9 + d[28]*u10 + d[34]*u11); 112 uik[11]= -(d[5]*u6+ d[11]*u7 + d[17]*u8 + d[23]*u9 + d[29]*u10 + d[35]*u11); 113 114 uik[12] = -(d[0]*u12 + d[6]*u13 + d[12]*u14 + d[18]*u15 + d[24]*u16 + d[30]*u17); 115 uik[13] = -(d[1]*u12 + d[7]*u13 + d[13]*u14 + d[19]*u15 + d[25]*u16 + d[31]*u17); 116 uik[14] = -(d[2]*u12 + d[8]*u13 + d[14]*u14 + d[20]*u15 + d[26]*u16 + d[32]*u17); 117 uik[15] = -(d[3]*u12 + d[9]*u13 + d[15]*u14 + d[21]*u15 + d[27]*u16 + d[33]*u17); 118 uik[16] = -(d[4]*u12+ d[10]*u13 + d[16]*u14 + d[22]*u15 + d[28]*u16 + d[34]*u17); 119 uik[17] = -(d[5]*u12+ d[11]*u13 + d[17]*u14 + d[23]*u15 + d[29]*u16 + d[35]*u17); 120 121 uik[18] = -(d[0]*u18 + d[6]*u19 + d[12]*u20 + d[18]*u21 + d[24]*u22 + d[30]*u23); 122 uik[19] = -(d[1]*u18 + d[7]*u19 + d[13]*u20 + d[19]*u21 + d[25]*u22 + d[31]*u23); 123 uik[20] = -(d[2]*u18 + d[8]*u19 + d[14]*u20 + d[20]*u21 + d[26]*u22 + d[32]*u23); 124 uik[21] = -(d[3]*u18 + d[9]*u19 + d[15]*u20 + d[21]*u21 + d[27]*u22 + d[33]*u23); 125 uik[22] = -(d[4]*u18+ d[10]*u19 + d[16]*u20 + d[22]*u21 + d[28]*u22 + d[34]*u23); 126 uik[23] = -(d[5]*u18+ d[11]*u19 + d[17]*u20 + d[23]*u21 + d[29]*u22 + d[35]*u23); 127 128 uik[24] = -(d[0]*u24 + d[6]*u25 + d[12]*u26 + d[18]*u27 + d[24]*u28 + d[30]*u29); 129 uik[25] = -(d[1]*u24 + d[7]*u25 + d[13]*u26 + d[19]*u27 + d[25]*u28 + d[31]*u29); 130 uik[26] = -(d[2]*u24 + d[8]*u25 + d[14]*u26 + d[20]*u27 + d[26]*u28 + d[32]*u29); 131 uik[27] = -(d[3]*u24 + d[9]*u25 + d[15]*u26 + d[21]*u27 + d[27]*u28 + d[33]*u29); 132 uik[28] = -(d[4]*u24+ d[10]*u25 + d[16]*u26 + d[22]*u27 + d[28]*u28 + d[34]*u29); 133 uik[29] = -(d[5]*u24+ d[11]*u25 + d[17]*u26 + d[23]*u27 + d[29]*u28 + d[35]*u29); 134 135 uik[30] = -(d[0]*u30 + d[6]*u31 + d[12]*u32 + d[18]*u33 + d[24]*u34 + d[30]*u35); 136 uik[31] = -(d[1]*u30 + d[7]*u31 + d[13]*u32 + d[19]*u33 + d[25]*u34 + d[31]*u35); 137 uik[32] = -(d[2]*u30 + d[8]*u31 + d[14]*u32 + d[20]*u33 + d[26]*u34 + d[32]*u35); 138 uik[33] = -(d[3]*u30 + d[9]*u31 + d[15]*u32 + d[21]*u33 + d[27]*u34 + d[33]*u35); 139 uik[34] = -(d[4]*u30+ d[10]*u31 + d[16]*u32 + d[22]*u33 + d[28]*u34 + d[34]*u35); 140 uik[35] = -(d[5]*u30+ d[11]*u31 + d[17]*u32 + d[23]*u33 + d[29]*u34 + d[35]*u35); 141 142 /* update D(k) += -U(i,k)^T * U_bar(i,k) */ 143 dk[0] += uik[0]*u0 + uik[1]*u1 + uik[2]*u2 + uik[3]*u3 + uik[4]*u4 + uik[5]*u5; 144 dk[1] += uik[6]*u0 + uik[7]*u1 + uik[8]*u2 + uik[9]*u3+ uik[10]*u4+ uik[11]*u5; 145 dk[2] += uik[12]*u0+ uik[13]*u1+ uik[14]*u2+ uik[15]*u3+ uik[16]*u4+ uik[17]*u5; 146 dk[3] += uik[18]*u0+ uik[19]*u1+ uik[20]*u2+ uik[21]*u3+ uik[22]*u4+ uik[23]*u5; 147 dk[4] += uik[24]*u0+ uik[25]*u1+ uik[26]*u2+ uik[27]*u3+ uik[28]*u4+ uik[29]*u5; 148 dk[5] += uik[30]*u0+ uik[31]*u1+ uik[32]*u2+ uik[33]*u3+ uik[34]*u4+ uik[35]*u5; 149 150 dk[6] += uik[0]*u6 + uik[1]*u7 + uik[2]*u8 + uik[3]*u9 + uik[4]*u10 + uik[5]*u11; 151 dk[7] += uik[6]*u6 + uik[7]*u7 + uik[8]*u8 + uik[9]*u9+ uik[10]*u10+ uik[11]*u11; 152 dk[8] += uik[12]*u6+ uik[13]*u7+ uik[14]*u8+ uik[15]*u9+ uik[16]*u10+ uik[17]*u11; 153 dk[9] += uik[18]*u6+ uik[19]*u7+ uik[20]*u8+ uik[21]*u9+ uik[22]*u10+ uik[23]*u11; 154 dk[10]+= uik[24]*u6+ uik[25]*u7+ uik[26]*u8+ uik[27]*u9+ uik[28]*u10+ uik[29]*u11; 155 dk[11]+= uik[30]*u6+ uik[31]*u7+ uik[32]*u8+ uik[33]*u9+ uik[34]*u10+ uik[35]*u11; 156 157 dk[12]+= uik[0]*u12 + uik[1]*u13 + uik[2]*u14 + uik[3]*u15 + uik[4]*u16 + uik[5]*u17; 158 dk[13]+= uik[6]*u12 + uik[7]*u13 + uik[8]*u14 + uik[9]*u15+ uik[10]*u16+ uik[11]*u17; 159 dk[14]+= uik[12]*u12+ uik[13]*u13+ uik[14]*u14+ uik[15]*u15+ uik[16]*u16+ uik[17]*u17; 160 dk[15]+= uik[18]*u12+ uik[19]*u13+ uik[20]*u14+ uik[21]*u15+ uik[22]*u16+ uik[23]*u17; 161 dk[16]+= uik[24]*u12+ uik[25]*u13+ uik[26]*u14+ uik[27]*u15+ uik[28]*u16+ uik[29]*u17; 162 dk[17]+= uik[30]*u12+ uik[31]*u13+ uik[32]*u14+ uik[33]*u15+ uik[34]*u16+ uik[35]*u17; 163 164 dk[18]+= uik[0]*u18 + uik[1]*u19 + uik[2]*u20 + uik[3]*u21 + uik[4]*u22 + uik[5]*u23; 165 dk[19]+= uik[6]*u18 + uik[7]*u19 + uik[8]*u20 + uik[9]*u21+ uik[10]*u22+ uik[11]*u23; 166 dk[20]+= uik[12]*u18+ uik[13]*u19+ uik[14]*u20+ uik[15]*u21+ uik[16]*u22+ uik[17]*u23; 167 dk[21]+= uik[18]*u18+ uik[19]*u19+ uik[20]*u20+ uik[21]*u21+ uik[22]*u22+ uik[23]*u23; 168 dk[22]+= uik[24]*u18+ uik[25]*u19+ uik[26]*u20+ uik[27]*u21+ uik[28]*u22+ uik[29]*u23; 169 dk[23]+= uik[30]*u18+ uik[31]*u19+ uik[32]*u20+ uik[33]*u21+ uik[34]*u22+ uik[35]*u23; 170 171 dk[24]+= uik[0]*u24 + uik[1]*u25 + uik[2]*u26 + uik[3]*u27 + uik[4]*u28 + uik[5]*u29; 172 dk[25]+= uik[6]*u24 + uik[7]*u25 + uik[8]*u26 + uik[9]*u27+ uik[10]*u28+ uik[11]*u29; 173 dk[26]+= uik[12]*u24+ uik[13]*u25+ uik[14]*u26+ uik[15]*u27+ uik[16]*u28+ uik[17]*u29; 174 dk[27]+= uik[18]*u24+ uik[19]*u25+ uik[20]*u26+ uik[21]*u27+ uik[22]*u28+ uik[23]*u29; 175 dk[28]+= uik[24]*u24+ uik[25]*u25+ uik[26]*u26+ uik[27]*u27+ uik[28]*u28+ uik[29]*u29; 176 dk[29]+= uik[30]*u24+ uik[31]*u25+ uik[32]*u26+ uik[33]*u27+ uik[34]*u28+ uik[35]*u29; 177 178 dk[30]+= uik[0]*u30 + uik[1]*u31 + uik[2]*u32 + uik[3]*u33 + uik[4]*u34 + uik[5]*u35; 179 dk[31]+= uik[6]*u30 + uik[7]*u31 + uik[8]*u32 + uik[9]*u33+ uik[10]*u34+ uik[11]*u35; 180 dk[32]+= uik[12]*u30+ uik[13]*u31+ uik[14]*u32+ uik[15]*u33+ uik[16]*u34+ uik[17]*u35; 181 dk[33]+= uik[18]*u30+ uik[19]*u31+ uik[20]*u32+ uik[21]*u33+ uik[22]*u34+ uik[23]*u35; 182 dk[34]+= uik[24]*u30+ uik[25]*u31+ uik[26]*u32+ uik[27]*u33+ uik[28]*u34+ uik[29]*u35; 183 dk[35]+= uik[30]*u30+ uik[31]*u31+ uik[32]*u32+ uik[33]*u33+ uik[34]*u34+ uik[35]*u35; 184 185 PetscCall(PetscLogFlops(216.0*4.0)); 186 187 /* update -U(i,k) */ 188 PetscCall(PetscArraycpy(ba+ili*36,uik,36)); 189 190 /* add multiple of row i to k-th row ... */ 191 jmin = ili + 1; jmax = bi[i+1]; 192 if (jmin < jmax) { 193 for (j=jmin; j<jmax; j++) { 194 /* w += -U(i,k)^T * U_bar(i,j) */ 195 wp = w + bj[j]*36; 196 u = ba + j*36; 197 198 u0 = u[0]; u1 = u[1]; u2 = u[2]; u3 = u[3]; u4 = u[4]; u5 = u[5]; u6 = u[6]; 199 u7 = u[7]; u8 = u[8]; u9 = u[9]; u10 = u[10]; u11 = u[11]; u12 = u[12]; u13 = u[13]; 200 u14 = u[14]; u15 = u[15]; u16 = u[16]; u17 = u[17]; u18 = u[18]; u19 = u[19]; u20 = u[20]; 201 u21 = u[21]; u22 = u[22]; u23 = u[23]; u24 = u[24]; u25 = u[25]; u26 = u[26]; u27 = u[27]; 202 u28 = u[28]; u29 = u[29]; u30 = u[30]; u31 = u[31]; u32 = u[32]; u33 = u[33]; u34 = u[34]; 203 u35 = u[35]; 204 205 wp[0] += uik[0]*u0 + uik[1]*u1 + uik[2]*u2 + uik[3]*u3 + uik[4]*u4 + uik[5]*u5; 206 wp[1] += uik[6]*u0 + uik[7]*u1 + uik[8]*u2 + uik[9]*u3+ uik[10]*u4+ uik[11]*u5; 207 wp[2] += uik[12]*u0+ uik[13]*u1+ uik[14]*u2+ uik[15]*u3+ uik[16]*u4+ uik[17]*u5; 208 wp[3] += uik[18]*u0+ uik[19]*u1+ uik[20]*u2+ uik[21]*u3+ uik[22]*u4+ uik[23]*u5; 209 wp[4] += uik[24]*u0+ uik[25]*u1+ uik[26]*u2+ uik[27]*u3+ uik[28]*u4+ uik[29]*u5; 210 wp[5] += uik[30]*u0+ uik[31]*u1+ uik[32]*u2+ uik[33]*u3+ uik[34]*u4+ uik[35]*u5; 211 212 wp[6] += uik[0]*u6 + uik[1]*u7 + uik[2]*u8 + uik[3]*u9 + uik[4]*u10 + uik[5]*u11; 213 wp[7] += uik[6]*u6 + uik[7]*u7 + uik[8]*u8 + uik[9]*u9+ uik[10]*u10+ uik[11]*u11; 214 wp[8] += uik[12]*u6+ uik[13]*u7+ uik[14]*u8+ uik[15]*u9+ uik[16]*u10+ uik[17]*u11; 215 wp[9] += uik[18]*u6+ uik[19]*u7+ uik[20]*u8+ uik[21]*u9+ uik[22]*u10+ uik[23]*u11; 216 wp[10]+= uik[24]*u6+ uik[25]*u7+ uik[26]*u8+ uik[27]*u9+ uik[28]*u10+ uik[29]*u11; 217 wp[11]+= uik[30]*u6+ uik[31]*u7+ uik[32]*u8+ uik[33]*u9+ uik[34]*u10+ uik[35]*u11; 218 219 wp[12]+= uik[0]*u12 + uik[1]*u13 + uik[2]*u14 + uik[3]*u15 + uik[4]*u16 + uik[5]*u17; 220 wp[13]+= uik[6]*u12 + uik[7]*u13 + uik[8]*u14 + uik[9]*u15+ uik[10]*u16+ uik[11]*u17; 221 wp[14]+= uik[12]*u12+ uik[13]*u13+ uik[14]*u14+ uik[15]*u15+ uik[16]*u16+ uik[17]*u17; 222 wp[15]+= uik[18]*u12+ uik[19]*u13+ uik[20]*u14+ uik[21]*u15+ uik[22]*u16+ uik[23]*u17; 223 wp[16]+= uik[24]*u12+ uik[25]*u13+ uik[26]*u14+ uik[27]*u15+ uik[28]*u16+ uik[29]*u17; 224 wp[17]+= uik[30]*u12+ uik[31]*u13+ uik[32]*u14+ uik[33]*u15+ uik[34]*u16+ uik[35]*u17; 225 226 wp[18]+= uik[0]*u18 + uik[1]*u19 + uik[2]*u20 + uik[3]*u21 + uik[4]*u22 + uik[5]*u23; 227 wp[19]+= uik[6]*u18 + uik[7]*u19 + uik[8]*u20 + uik[9]*u21+ uik[10]*u22+ uik[11]*u23; 228 wp[20]+= uik[12]*u18+ uik[13]*u19+ uik[14]*u20+ uik[15]*u21+ uik[16]*u22+ uik[17]*u23; 229 wp[21]+= uik[18]*u18+ uik[19]*u19+ uik[20]*u20+ uik[21]*u21+ uik[22]*u22+ uik[23]*u23; 230 wp[22]+= uik[24]*u18+ uik[25]*u19+ uik[26]*u20+ uik[27]*u21+ uik[28]*u22+ uik[29]*u23; 231 wp[23]+= uik[30]*u18+ uik[31]*u19+ uik[32]*u20+ uik[33]*u21+ uik[34]*u22+ uik[35]*u23; 232 233 wp[24]+= uik[0]*u24 + uik[1]*u25 + uik[2]*u26 + uik[3]*u27 + uik[4]*u28 + uik[5]*u29; 234 wp[25]+= uik[6]*u24 + uik[7]*u25 + uik[8]*u26 + uik[9]*u27+ uik[10]*u28+ uik[11]*u29; 235 wp[26]+= uik[12]*u24+ uik[13]*u25+ uik[14]*u26+ uik[15]*u27+ uik[16]*u28+ uik[17]*u29; 236 wp[27]+= uik[18]*u24+ uik[19]*u25+ uik[20]*u26+ uik[21]*u27+ uik[22]*u28+ uik[23]*u29; 237 wp[28]+= uik[24]*u24+ uik[25]*u25+ uik[26]*u26+ uik[27]*u27+ uik[28]*u28+ uik[29]*u29; 238 wp[29]+= uik[30]*u24+ uik[31]*u25+ uik[32]*u26+ uik[33]*u27+ uik[34]*u28+ uik[35]*u29; 239 240 wp[30]+= uik[0]*u30 + uik[1]*u31 + uik[2]*u32 + uik[3]*u33 + uik[4]*u34 + uik[5]*u35; 241 wp[31]+= uik[6]*u30 + uik[7]*u31 + uik[8]*u32 + uik[9]*u33+ uik[10]*u34+ uik[11]*u35; 242 wp[32]+= uik[12]*u30+ uik[13]*u31+ uik[14]*u32+ uik[15]*u33+ uik[16]*u34+ uik[17]*u35; 243 wp[33]+= uik[18]*u30+ uik[19]*u31+ uik[20]*u32+ uik[21]*u33+ uik[22]*u34+ uik[23]*u35; 244 wp[34]+= uik[24]*u30+ uik[25]*u31+ uik[26]*u32+ uik[27]*u33+ uik[28]*u34+ uik[29]*u35; 245 wp[35]+= uik[30]*u30+ uik[31]*u31+ uik[32]*u32+ uik[33]*u33+ uik[34]*u34+ uik[35]*u35; 246 } 247 PetscCall(PetscLogFlops(2.0*216.0*(jmax-jmin))); 248 249 /* ... add i to row list for next nonzero entry */ 250 il[i] = jmin; /* update il(i) in column k+1, ... mbs-1 */ 251 j = bj[jmin]; 252 jl[i] = jl[j]; jl[j] = i; /* update jl */ 253 } 254 i = nexti; 255 } 256 257 /* save nonzero entries in k-th row of U ... */ 258 259 /* invert diagonal block */ 260 d = ba+k*36; 261 PetscCall(PetscArraycpy(d,dk,36)); 262 PetscCall(PetscKernel_A_gets_inverse_A_6(d,shift,allowzeropivot,&zeropivotdetected)); 263 if (zeropivotdetected) C->factorerrortype = MAT_FACTOR_NUMERIC_ZEROPIVOT; 264 265 jmin = bi[k]; jmax = bi[k+1]; 266 if (jmin < jmax) { 267 for (j=jmin; j<jmax; j++) { 268 vj = bj[j]; /* block col. index of U */ 269 u = ba + j*36; 270 wp = w + vj*36; 271 for (k1=0; k1<36; k1++) { 272 *u++ = *wp; 273 *wp++ = 0.0; 274 } 275 } 276 277 /* ... add k to row list for first nonzero entry in k-th row */ 278 il[k] = jmin; 279 i = bj[jmin]; 280 jl[k] = jl[i]; jl[i] = k; 281 } 282 } 283 284 PetscCall(PetscFree(w)); 285 PetscCall(PetscFree2(il,jl)); 286 PetscCall(PetscFree2(dk,uik)); 287 if (a->permute) { 288 PetscCall(PetscFree(aa)); 289 } 290 291 PetscCall(ISRestoreIndices(perm,&perm_ptr)); 292 293 C->ops->solve = MatSolve_SeqSBAIJ_6_inplace; 294 C->ops->solvetranspose = MatSolve_SeqSBAIJ_6_inplace; 295 C->assembled = PETSC_TRUE; 296 C->preallocated = PETSC_TRUE; 297 298 PetscCall(PetscLogFlops(1.3333*216*b->mbs)); /* from inverting diagonal blocks */ 299 PetscFunctionReturn(0); 300 } 301