#include <../src/mat/impls/baij/seq/baij.h> #include /* bs = 15 for PFLOTRAN. Block operations are done by accessing all the columns of the block at once */ PetscErrorCode MatSolve_SeqBAIJ_15_NaturalOrdering_ver2(Mat A, Vec bb, Vec xx) { Mat_SeqBAIJ *a = (Mat_SeqBAIJ *)A->data; const PetscInt n = a->mbs, *ai = a->i, *aj = a->j, *adiag = a->diag, *vi, bs = A->rmap->bs, bs2 = a->bs2; PetscInt i, nz, idx, idt, m; const MatScalar *aa = a->a, *v; PetscScalar s1, s2, s3, s4, s5, s6, s7, s8, s9, s10, s11, s12, s13, s14, s15; PetscScalar x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15; PetscScalar *x; const PetscScalar *b; PetscFunctionBegin; PetscCall(VecGetArrayRead(bb, &b)); PetscCall(VecGetArray(xx, &x)); /* forward solve the lower triangular */ idx = 0; x[0] = b[idx]; x[1] = b[1 + idx]; x[2] = b[2 + idx]; x[3] = b[3 + idx]; x[4] = b[4 + idx]; x[5] = b[5 + idx]; x[6] = b[6 + idx]; x[7] = b[7 + idx]; x[8] = b[8 + idx]; x[9] = b[9 + idx]; x[10] = b[10 + idx]; x[11] = b[11 + idx]; x[12] = b[12 + idx]; x[13] = b[13 + idx]; x[14] = b[14 + idx]; for (i = 1; i < n; i++) { v = aa + bs2 * ai[i]; vi = aj + ai[i]; nz = ai[i + 1] - ai[i]; idt = bs * i; s1 = b[idt]; s2 = b[1 + idt]; s3 = b[2 + idt]; s4 = b[3 + idt]; s5 = b[4 + idt]; s6 = b[5 + idt]; s7 = b[6 + idt]; s8 = b[7 + idt]; s9 = b[8 + idt]; s10 = b[9 + idt]; s11 = b[10 + idt]; s12 = b[11 + idt]; s13 = b[12 + idt]; s14 = b[13 + idt]; s15 = b[14 + idt]; for (m = 0; m < nz; m++) { idx = bs * vi[m]; x1 = x[idx]; x2 = x[1 + idx]; x3 = x[2 + idx]; x4 = x[3 + idx]; x5 = x[4 + idx]; x6 = x[5 + idx]; x7 = x[6 + idx]; x8 = x[7 + idx]; x9 = x[8 + idx]; x10 = x[9 + idx]; x11 = x[10 + idx]; x12 = x[11 + idx]; x13 = x[12 + idx]; x14 = x[13 + idx]; x15 = x[14 + idx]; s1 -= v[0] * x1 + v[15] * x2 + v[30] * x3 + v[45] * x4 + v[60] * x5 + v[75] * x6 + v[90] * x7 + v[105] * x8 + v[120] * x9 + v[135] * x10 + v[150] * x11 + v[165] * x12 + v[180] * x13 + v[195] * x14 + v[210] * x15; s2 -= v[1] * x1 + v[16] * x2 + v[31] * x3 + v[46] * x4 + v[61] * x5 + v[76] * x6 + v[91] * x7 + v[106] * x8 + v[121] * x9 + v[136] * x10 + v[151] * x11 + v[166] * x12 + v[181] * x13 + v[196] * x14 + v[211] * x15; s3 -= v[2] * x1 + v[17] * x2 + v[32] * x3 + v[47] * x4 + v[62] * x5 + v[77] * x6 + v[92] * x7 + v[107] * x8 + v[122] * x9 + v[137] * x10 + v[152] * x11 + v[167] * x12 + v[182] * x13 + v[197] * x14 + v[212] * x15; s4 -= v[3] * x1 + v[18] * x2 + v[33] * x3 + v[48] * x4 + v[63] * x5 + v[78] * x6 + v[93] * x7 + v[108] * x8 + v[123] * x9 + v[138] * x10 + v[153] * x11 + v[168] * x12 + v[183] * x13 + v[198] * x14 + v[213] * x15; s5 -= v[4] * x1 + v[19] * x2 + v[34] * x3 + v[49] * x4 + v[64] * x5 + v[79] * x6 + v[94] * x7 + v[109] * x8 + v[124] * x9 + v[139] * x10 + v[154] * x11 + v[169] * x12 + v[184] * x13 + v[199] * x14 + v[214] * x15; s6 -= v[5] * x1 + v[20] * x2 + v[35] * x3 + v[50] * x4 + v[65] * x5 + v[80] * x6 + v[95] * x7 + v[110] * x8 + v[125] * x9 + v[140] * x10 + v[155] * x11 + v[170] * x12 + v[185] * x13 + v[200] * x14 + v[215] * x15; s7 -= v[6] * x1 + v[21] * x2 + v[36] * x3 + v[51] * x4 + v[66] * x5 + v[81] * x6 + v[96] * x7 + v[111] * x8 + v[126] * x9 + v[141] * x10 + v[156] * x11 + v[171] * x12 + v[186] * x13 + v[201] * x14 + v[216] * x15; s8 -= v[7] * x1 + v[22] * x2 + v[37] * x3 + v[52] * x4 + v[67] * x5 + v[82] * x6 + v[97] * x7 + v[112] * x8 + v[127] * x9 + v[142] * x10 + v[157] * x11 + v[172] * x12 + v[187] * x13 + v[202] * x14 + v[217] * x15; s9 -= v[8] * x1 + v[23] * x2 + v[38] * x3 + v[53] * x4 + v[68] * x5 + v[83] * x6 + v[98] * x7 + v[113] * x8 + v[128] * x9 + v[143] * x10 + v[158] * x11 + v[173] * x12 + v[188] * x13 + v[203] * x14 + v[218] * x15; s10 -= v[9] * x1 + v[24] * x2 + v[39] * x3 + v[54] * x4 + v[69] * x5 + v[84] * x6 + v[99] * x7 + v[114] * x8 + v[129] * x9 + v[144] * x10 + v[159] * x11 + v[174] * x12 + v[189] * x13 + v[204] * x14 + v[219] * x15; s11 -= v[10] * x1 + v[25] * x2 + v[40] * x3 + v[55] * x4 + v[70] * x5 + v[85] * x6 + v[100] * x7 + v[115] * x8 + v[130] * x9 + v[145] * x10 + v[160] * x11 + v[175] * x12 + v[190] * x13 + v[205] * x14 + v[220] * x15; s12 -= v[11] * x1 + v[26] * x2 + v[41] * x3 + v[56] * x4 + v[71] * x5 + v[86] * x6 + v[101] * x7 + v[116] * x8 + v[131] * x9 + v[146] * x10 + v[161] * x11 + v[176] * x12 + v[191] * x13 + v[206] * x14 + v[221] * x15; s13 -= v[12] * x1 + v[27] * x2 + v[42] * x3 + v[57] * x4 + v[72] * x5 + v[87] * x6 + v[102] * x7 + v[117] * x8 + v[132] * x9 + v[147] * x10 + v[162] * x11 + v[177] * x12 + v[192] * x13 + v[207] * x14 + v[222] * x15; s14 -= v[13] * x1 + v[28] * x2 + v[43] * x3 + v[58] * x4 + v[73] * x5 + v[88] * x6 + v[103] * x7 + v[118] * x8 + v[133] * x9 + v[148] * x10 + v[163] * x11 + v[178] * x12 + v[193] * x13 + v[208] * x14 + v[223] * x15; s15 -= v[14] * x1 + v[29] * x2 + v[44] * x3 + v[59] * x4 + v[74] * x5 + v[89] * x6 + v[104] * x7 + v[119] * x8 + v[134] * x9 + v[149] * x10 + v[164] * x11 + v[179] * x12 + v[194] * x13 + v[209] * x14 + v[224] * x15; v += bs2; } x[idt] = s1; x[1 + idt] = s2; x[2 + idt] = s3; x[3 + idt] = s4; x[4 + idt] = s5; x[5 + idt] = s6; x[6 + idt] = s7; x[7 + idt] = s8; x[8 + idt] = s9; x[9 + idt] = s10; x[10 + idt] = s11; x[11 + idt] = s12; x[12 + idt] = s13; x[13 + idt] = s14; x[14 + idt] = s15; } /* backward solve the upper triangular */ for (i = n - 1; i >= 0; i--) { v = aa + bs2 * (adiag[i + 1] + 1); vi = aj + adiag[i + 1] + 1; nz = adiag[i] - adiag[i + 1] - 1; idt = bs * i; s1 = x[idt]; s2 = x[1 + idt]; s3 = x[2 + idt]; s4 = x[3 + idt]; s5 = x[4 + idt]; s6 = x[5 + idt]; s7 = x[6 + idt]; s8 = x[7 + idt]; s9 = x[8 + idt]; s10 = x[9 + idt]; s11 = x[10 + idt]; s12 = x[11 + idt]; s13 = x[12 + idt]; s14 = x[13 + idt]; s15 = x[14 + idt]; for (m = 0; m < nz; m++) { idx = bs * vi[m]; x1 = x[idx]; x2 = x[1 + idx]; x3 = x[2 + idx]; x4 = x[3 + idx]; x5 = x[4 + idx]; x6 = x[5 + idx]; x7 = x[6 + idx]; x8 = x[7 + idx]; x9 = x[8 + idx]; x10 = x[9 + idx]; x11 = x[10 + idx]; x12 = x[11 + idx]; x13 = x[12 + idx]; x14 = x[13 + idx]; x15 = x[14 + idx]; s1 -= v[0] * x1 + v[15] * x2 + v[30] * x3 + v[45] * x4 + v[60] * x5 + v[75] * x6 + v[90] * x7 + v[105] * x8 + v[120] * x9 + v[135] * x10 + v[150] * x11 + v[165] * x12 + v[180] * x13 + v[195] * x14 + v[210] * x15; s2 -= v[1] * x1 + v[16] * x2 + v[31] * x3 + v[46] * x4 + v[61] * x5 + v[76] * x6 + v[91] * x7 + v[106] * x8 + v[121] * x9 + v[136] * x10 + v[151] * x11 + v[166] * x12 + v[181] * x13 + v[196] * x14 + v[211] * x15; s3 -= v[2] * x1 + v[17] * x2 + v[32] * x3 + v[47] * x4 + v[62] * x5 + v[77] * x6 + v[92] * x7 + v[107] * x8 + v[122] * x9 + v[137] * x10 + v[152] * x11 + v[167] * x12 + v[182] * x13 + v[197] * x14 + v[212] * x15; s4 -= v[3] * x1 + v[18] * x2 + v[33] * x3 + v[48] * x4 + v[63] * x5 + v[78] * x6 + v[93] * x7 + v[108] * x8 + v[123] * x9 + v[138] * x10 + v[153] * x11 + v[168] * x12 + v[183] * x13 + v[198] * x14 + v[213] * x15; s5 -= v[4] * x1 + v[19] * x2 + v[34] * x3 + v[49] * x4 + v[64] * x5 + v[79] * x6 + v[94] * x7 + v[109] * x8 + v[124] * x9 + v[139] * x10 + v[154] * x11 + v[169] * x12 + v[184] * x13 + v[199] * x14 + v[214] * x15; s6 -= v[5] * x1 + v[20] * x2 + v[35] * x3 + v[50] * x4 + v[65] * x5 + v[80] * x6 + v[95] * x7 + v[110] * x8 + v[125] * x9 + v[140] * x10 + v[155] * x11 + v[170] * x12 + v[185] * x13 + v[200] * x14 + v[215] * x15; s7 -= v[6] * x1 + v[21] * x2 + v[36] * x3 + v[51] * x4 + v[66] * x5 + v[81] * x6 + v[96] * x7 + v[111] * x8 + v[126] * x9 + v[141] * x10 + v[156] * x11 + v[171] * x12 + v[186] * x13 + v[201] * x14 + v[216] * x15; s8 -= v[7] * x1 + v[22] * x2 + v[37] * x3 + v[52] * x4 + v[67] * x5 + v[82] * x6 + v[97] * x7 + v[112] * x8 + v[127] * x9 + v[142] * x10 + v[157] * x11 + v[172] * x12 + v[187] * x13 + v[202] * x14 + v[217] * x15; s9 -= v[8] * x1 + v[23] * x2 + v[38] * x3 + v[53] * x4 + v[68] * x5 + v[83] * x6 + v[98] * x7 + v[113] * x8 + v[128] * x9 + v[143] * x10 + v[158] * x11 + v[173] * x12 + v[188] * x13 + v[203] * x14 + v[218] * x15; s10 -= v[9] * x1 + v[24] * x2 + v[39] * x3 + v[54] * x4 + v[69] * x5 + v[84] * x6 + v[99] * x7 + v[114] * x8 + v[129] * x9 + v[144] * x10 + v[159] * x11 + v[174] * x12 + v[189] * x13 + v[204] * x14 + v[219] * x15; s11 -= v[10] * x1 + v[25] * x2 + v[40] * x3 + v[55] * x4 + v[70] * x5 + v[85] * x6 + v[100] * x7 + v[115] * x8 + v[130] * x9 + v[145] * x10 + v[160] * x11 + v[175] * x12 + v[190] * x13 + v[205] * x14 + v[220] * x15; s12 -= v[11] * x1 + v[26] * x2 + v[41] * x3 + v[56] * x4 + v[71] * x5 + v[86] * x6 + v[101] * x7 + v[116] * x8 + v[131] * x9 + v[146] * x10 + v[161] * x11 + v[176] * x12 + v[191] * x13 + v[206] * x14 + v[221] * x15; s13 -= v[12] * x1 + v[27] * x2 + v[42] * x3 + v[57] * x4 + v[72] * x5 + v[87] * x6 + v[102] * x7 + v[117] * x8 + v[132] * x9 + v[147] * x10 + v[162] * x11 + v[177] * x12 + v[192] * x13 + v[207] * x14 + v[222] * x15; s14 -= v[13] * x1 + v[28] * x2 + v[43] * x3 + v[58] * x4 + v[73] * x5 + v[88] * x6 + v[103] * x7 + v[118] * x8 + v[133] * x9 + v[148] * x10 + v[163] * x11 + v[178] * x12 + v[193] * x13 + v[208] * x14 + v[223] * x15; s15 -= v[14] * x1 + v[29] * x2 + v[44] * x3 + v[59] * x4 + v[74] * x5 + v[89] * x6 + v[104] * x7 + v[119] * x8 + v[134] * x9 + v[149] * x10 + v[164] * x11 + v[179] * x12 + v[194] * x13 + v[209] * x14 + v[224] * x15; v += bs2; } x[idt] = v[0] * s1 + v[15] * s2 + v[30] * s3 + v[45] * s4 + v[60] * s5 + v[75] * s6 + v[90] * s7 + v[105] * s8 + v[120] * s9 + v[135] * s10 + v[150] * s11 + v[165] * s12 + v[180] * s13 + v[195] * s14 + v[210] * s15; x[1 + idt] = v[1] * s1 + v[16] * s2 + v[31] * s3 + v[46] * s4 + v[61] * s5 + v[76] * s6 + v[91] * s7 + v[106] * s8 + v[121] * s9 + v[136] * s10 + v[151] * s11 + v[166] * s12 + v[181] * s13 + v[196] * s14 + v[211] * s15; x[2 + idt] = v[2] * s1 + v[17] * s2 + v[32] * s3 + v[47] * s4 + v[62] * s5 + v[77] * s6 + v[92] * s7 + v[107] * s8 + v[122] * s9 + v[137] * s10 + v[152] * s11 + v[167] * s12 + v[182] * s13 + v[197] * s14 + v[212] * s15; x[3 + idt] = v[3] * s1 + v[18] * s2 + v[33] * s3 + v[48] * s4 + v[63] * s5 + v[78] * s6 + v[93] * s7 + v[108] * s8 + v[123] * s9 + v[138] * s10 + v[153] * s11 + v[168] * s12 + v[183] * s13 + v[198] * s14 + v[213] * s15; x[4 + idt] = v[4] * s1 + v[19] * s2 + v[34] * s3 + v[49] * s4 + v[64] * s5 + v[79] * s6 + v[94] * s7 + v[109] * s8 + v[124] * s9 + v[139] * s10 + v[154] * s11 + v[169] * s12 + v[184] * s13 + v[199] * s14 + v[214] * s15; x[5 + idt] = v[5] * s1 + v[20] * s2 + v[35] * s3 + v[50] * s4 + v[65] * s5 + v[80] * s6 + v[95] * s7 + v[110] * s8 + v[125] * s9 + v[140] * s10 + v[155] * s11 + v[170] * s12 + v[185] * s13 + v[200] * s14 + v[215] * s15; x[6 + idt] = v[6] * s1 + v[21] * s2 + v[36] * s3 + v[51] * s4 + v[66] * s5 + v[81] * s6 + v[96] * s7 + v[111] * s8 + v[126] * s9 + v[141] * s10 + v[156] * s11 + v[171] * s12 + v[186] * s13 + v[201] * s14 + v[216] * s15; x[7 + idt] = v[7] * s1 + v[22] * s2 + v[37] * s3 + v[52] * s4 + v[67] * s5 + v[82] * s6 + v[97] * s7 + v[112] * s8 + v[127] * s9 + v[142] * s10 + v[157] * s11 + v[172] * s12 + v[187] * s13 + v[202] * s14 + v[217] * s15; x[8 + idt] = v[8] * s1 + v[23] * s2 + v[38] * s3 + v[53] * s4 + v[68] * s5 + v[83] * s6 + v[98] * s7 + v[113] * s8 + v[128] * s9 + v[143] * s10 + v[158] * s11 + v[173] * s12 + v[188] * s13 + v[203] * s14 + v[218] * s15; x[9 + idt] = v[9] * s1 + v[24] * s2 + v[39] * s3 + v[54] * s4 + v[69] * s5 + v[84] * s6 + v[99] * s7 + v[114] * s8 + v[129] * s9 + v[144] * s10 + v[159] * s11 + v[174] * s12 + v[189] * s13 + v[204] * s14 + v[219] * s15; x[10 + idt] = v[10] * s1 + v[25] * s2 + v[40] * s3 + v[55] * s4 + v[70] * s5 + v[85] * s6 + v[100] * s7 + v[115] * s8 + v[130] * s9 + v[145] * s10 + v[160] * s11 + v[175] * s12 + v[190] * s13 + v[205] * s14 + v[220] * s15; x[11 + idt] = v[11] * s1 + v[26] * s2 + v[41] * s3 + v[56] * s4 + v[71] * s5 + v[86] * s6 + v[101] * s7 + v[116] * s8 + v[131] * s9 + v[146] * s10 + v[161] * s11 + v[176] * s12 + v[191] * s13 + v[206] * s14 + v[221] * s15; x[12 + idt] = v[12] * s1 + v[27] * s2 + v[42] * s3 + v[57] * s4 + v[72] * s5 + v[87] * s6 + v[102] * s7 + v[117] * s8 + v[132] * s9 + v[147] * s10 + v[162] * s11 + v[177] * s12 + v[192] * s13 + v[207] * s14 + v[222] * s15; x[13 + idt] = v[13] * s1 + v[28] * s2 + v[43] * s3 + v[58] * s4 + v[73] * s5 + v[88] * s6 + v[103] * s7 + v[118] * s8 + v[133] * s9 + v[148] * s10 + v[163] * s11 + v[178] * s12 + v[193] * s13 + v[208] * s14 + v[223] * s15; x[14 + idt] = v[14] * s1 + v[29] * s2 + v[44] * s3 + v[59] * s4 + v[74] * s5 + v[89] * s6 + v[104] * s7 + v[119] * s8 + v[134] * s9 + v[149] * s10 + v[164] * s11 + v[179] * s12 + v[194] * s13 + v[209] * s14 + v[224] * s15; } PetscCall(VecRestoreArrayRead(bb, &b)); PetscCall(VecRestoreArray(xx, &x)); PetscCall(PetscLogFlops(2.0 * bs2 * (a->nz) - bs * A->cmap->n)); PetscFunctionReturn(PETSC_SUCCESS); } /* bs = 15 for PFLOTRAN. Block operations are done by accessing one column at a time */ /* Default MatSolve for block size 15 */ PetscErrorCode MatSolve_SeqBAIJ_15_NaturalOrdering_ver1(Mat A, Vec bb, Vec xx) { Mat_SeqBAIJ *a = (Mat_SeqBAIJ *)A->data; const PetscInt n = a->mbs, *ai = a->i, *aj = a->j, *adiag = a->diag, *vi, bs = A->rmap->bs, bs2 = a->bs2; PetscInt i, k, nz, idx, idt, m; const MatScalar *aa = a->a, *v; PetscScalar s[15]; PetscScalar *x, xv; const PetscScalar *b; PetscFunctionBegin; PetscCall(VecGetArrayRead(bb, &b)); PetscCall(VecGetArray(xx, &x)); /* forward solve the lower triangular */ for (i = 0; i < n; i++) { v = aa + bs2 * ai[i]; vi = aj + ai[i]; nz = ai[i + 1] - ai[i]; idt = bs * i; x[idt] = b[idt]; x[1 + idt] = b[1 + idt]; x[2 + idt] = b[2 + idt]; x[3 + idt] = b[3 + idt]; x[4 + idt] = b[4 + idt]; x[5 + idt] = b[5 + idt]; x[6 + idt] = b[6 + idt]; x[7 + idt] = b[7 + idt]; x[8 + idt] = b[8 + idt]; x[9 + idt] = b[9 + idt]; x[10 + idt] = b[10 + idt]; x[11 + idt] = b[11 + idt]; x[12 + idt] = b[12 + idt]; x[13 + idt] = b[13 + idt]; x[14 + idt] = b[14 + idt]; for (m = 0; m < nz; m++) { idx = bs * vi[m]; for (k = 0; k < 15; k++) { xv = x[k + idx]; x[idt] -= v[0] * xv; x[1 + idt] -= v[1] * xv; x[2 + idt] -= v[2] * xv; x[3 + idt] -= v[3] * xv; x[4 + idt] -= v[4] * xv; x[5 + idt] -= v[5] * xv; x[6 + idt] -= v[6] * xv; x[7 + idt] -= v[7] * xv; x[8 + idt] -= v[8] * xv; x[9 + idt] -= v[9] * xv; x[10 + idt] -= v[10] * xv; x[11 + idt] -= v[11] * xv; x[12 + idt] -= v[12] * xv; x[13 + idt] -= v[13] * xv; x[14 + idt] -= v[14] * xv; v += 15; } } } /* backward solve the upper triangular */ for (i = n - 1; i >= 0; i--) { v = aa + bs2 * (adiag[i + 1] + 1); vi = aj + adiag[i + 1] + 1; nz = adiag[i] - adiag[i + 1] - 1; idt = bs * i; s[0] = x[idt]; s[1] = x[1 + idt]; s[2] = x[2 + idt]; s[3] = x[3 + idt]; s[4] = x[4 + idt]; s[5] = x[5 + idt]; s[6] = x[6 + idt]; s[7] = x[7 + idt]; s[8] = x[8 + idt]; s[9] = x[9 + idt]; s[10] = x[10 + idt]; s[11] = x[11 + idt]; s[12] = x[12 + idt]; s[13] = x[13 + idt]; s[14] = x[14 + idt]; for (m = 0; m < nz; m++) { idx = bs * vi[m]; for (k = 0; k < 15; k++) { xv = x[k + idx]; s[0] -= v[0] * xv; s[1] -= v[1] * xv; s[2] -= v[2] * xv; s[3] -= v[3] * xv; s[4] -= v[4] * xv; s[5] -= v[5] * xv; s[6] -= v[6] * xv; s[7] -= v[7] * xv; s[8] -= v[8] * xv; s[9] -= v[9] * xv; s[10] -= v[10] * xv; s[11] -= v[11] * xv; s[12] -= v[12] * xv; s[13] -= v[13] * xv; s[14] -= v[14] * xv; v += 15; } } PetscCall(PetscArrayzero(x + idt, bs)); for (k = 0; k < 15; k++) { x[idt] += v[0] * s[k]; x[1 + idt] += v[1] * s[k]; x[2 + idt] += v[2] * s[k]; x[3 + idt] += v[3] * s[k]; x[4 + idt] += v[4] * s[k]; x[5 + idt] += v[5] * s[k]; x[6 + idt] += v[6] * s[k]; x[7 + idt] += v[7] * s[k]; x[8 + idt] += v[8] * s[k]; x[9 + idt] += v[9] * s[k]; x[10 + idt] += v[10] * s[k]; x[11 + idt] += v[11] * s[k]; x[12 + idt] += v[12] * s[k]; x[13 + idt] += v[13] * s[k]; x[14 + idt] += v[14] * s[k]; v += 15; } } PetscCall(VecRestoreArrayRead(bb, &b)); PetscCall(VecRestoreArray(xx, &x)); PetscCall(PetscLogFlops(2.0 * bs2 * (a->nz) - bs * A->cmap->n)); PetscFunctionReturn(PETSC_SUCCESS); }