/* * Automatically Tuned Linear Algebra Software v3.10.2 * (C) Copyright 1999 R. Clint Whaley * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions, and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the ATLAS group or the names of its contributers may * not be used to endorse or promote products derived from this * software without specific written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ATLAS GROUP OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * */ #ifdef TCPLX static int ATL_potrf2(const int N, TYPE *A, const int lda) { int j, k; static const TYPE one[2] = {ATL_rone, ATL_rzero}; static const TYPE none[2] = {ATL_rnone, ATL_rzero}; const size_t lda2 = lda+lda; TYPE Ajj, *Ac=A, *An=A+lda2; for (k=j=0; j != N; j++, k += 2) { Ajj = Ac[k] - llt_dot(k, Ac, 1, Ac, 1); Ac[k+1] = ATL_rzero; if (Ajj > ATL_rzero) { Ac[k] = Ajj = sqrt(Ajj); if (j != N-1) { llt_scal(j, ATL_rnone, Ac+1, 2); cblas_gemv(CblasColMajor, CblasTrans, j, N-j-1, none, An, lda, Ac, 1, one, An+k, lda); llt_scal(j, ATL_rnone, Ac+1, 2); llt_rscal(N-j-1, ATL_rone/Ajj, An+k, lda); Ac = An; An += lda2; } } else { Ac[k] = Ajj; return(j+1); } } return(0); } #else /* real version */ static int ATL_potrf2(const int N, TYPE *A, const int lda) { int j; TYPE Ajj, *Ac=A, *An=A+lda; for (j=0; j != N; j++) { Ajj = Ac[j] - cblas_dot(j, Ac, 1, Ac, 1); if (Ajj > ATL_rzero) { Ac[j] = Ajj = sqrt(Ajj); if (j != N-1) { cblas_gemv(CblasColMajor, CblasTrans, j, N-j-1, ATL_rnone, An, lda, Ac, 1, ATL_rone, An+j, lda); cblas_scal(N-j-1, ATL_rone/Ajj, An+j, lda); Ac = An; An += lda; } } else { Ac[j] = Ajj; return(j+1); } } return(0); }
static int ATL_potrf2(const int N, TYPE *A, const int lda) { int j, k; static const TYPE one[2] = {ATL_rone, ATL_rzero}; static const TYPE none[2] = {ATL_rnone, ATL_rzero}; const size_t lda2 = lda+lda; TYPE Ajj, *Ac=A, *An=A+lda2; for (k=j=0; j != N; j++, k += 2) { Ajj = Ac[k] - llt_dot(k, Ac, 1, Ac, 1); Ac[k+1] = ATL_rzero; if (Ajj > ATL_rzero) { Ac[k] = Ajj = sqrt(Ajj); if (j != N-1) { llt_scal(j, ATL_rnone, Ac+1, 2); cblas_gemv(CblasColMajor, CblasTrans, j, N-j-1, none, An, lda, Ac, 1, one, An+k, lda); llt_scal(j, ATL_rnone, Ac+1, 2); llt_rscal(N-j-1, ATL_rone/Ajj, An+k, lda); Ac = An; An += lda2; } } else { Ac[k] = Ajj; return(j+1); } } return(0); }
static int L2LU(const int M, const int N, TYPE *A, const int lda, int *ipiv) /* * Complex Level 2 based left-looking LU */ { TYPE *Ac=A; TYPE t0, tmp[2]; const TYPE one[2] = {ATL_rone, ATL_rzero}, none[2] = {ATL_rnone, ATL_rzero}; const int MN=Mmin(M,N), MN_1=MN-1, lda2=lda+lda; int ip, ip2, j, j2, jn, jn2, iret=0; for (j=0, j2=0, jn=1, jn2=2; j != MN; j=jn++, j2 += 2, jn2 += 2) { ipiv[j] = ip = j + cblas_iamax(M-j, Ac+j2, 1); ip2 = ip + ip; if (Ac[ip2] != ATL_rzero || Ac[ip2+1] != ATL_rzero) { Mjoin(PATL,cplxinvert)(1, Ac+ip2, 1, tmp, 1); cblas_swap(N, A+j2, lda, A+ip2, lda); cblas_scal(M-jn, tmp, Ac+jn2, 1); if (j != MN_1) { Ac += lda2; cblas_trsv(CblasColMajor, CblasLower, CblasNoTrans, CblasUnit, jn, A, lda, Ac, 1); cblas_gemv(CblasColMajor, CblasNoTrans, M-jn, jn, none, A+jn2, lda, Ac, 1, one, Ac+jn2, 1); } } else if (!iret) iret = jn; } return(iret); }
static int L2LU(const int M, const int N, TYPE *A, const int lda, int *ipiv) /* * Level 2 based left-looking LU */ { TYPE *Ac=A; TYPE t0; const int MN=Mmin(M,N), MN_1=MN-1; int ip, j, jn, iret=0; if (N == 2) return(LU2(M, A, lda, ipiv)); for (j=0, jn=1; j != MN; j=jn++) { ipiv[j] = ip = j + cblas_iamax(M-j, Ac+j, 1); t0 = Ac[ip]; if (t0 != ATL_rzero) { MySwap(N, A+j, lda, ip-j); cblas_scal(M-jn, ATL_rone/t0, Ac+jn, 1); if (j != MN_1) { Ac += lda; cblas_trsv(CblasColMajor, CblasLower, CblasNoTrans, CblasUnit, jn, A, lda, Ac, 1); cblas_gemv(CblasColMajor, CblasNoTrans, M-jn, jn, ATL_rnone, A+jn, lda, Ac, 1, ATL_rone, Ac+jn, 1); } } else if (!iret) iret = jn; } return(iret); }
/* * Automatically Tuned Linear Algebra Software v3.11.28 * (C) Copyright 1999 R. Clint Whaley * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions, and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the ATLAS group or the names of its contributers may * not be used to endorse or promote products derived from this * software without specific written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE ATLAS GROUP OR ITS CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * */ static int ATL_potrf2(const int N, TYPE *A, const int lda) { #ifdef TREAL TYPE Ajj, *Ac=A; const int N_1 = N-1; int j; for (j=0; j != N_1; j++, Ac += lda) { Ajj = Ac[j] - cblas_dot(j, A+j, lda, A+j, lda); if (Ajj > ATL_rzero) { Ac[j] = Ajj = sqrt(Ajj); cblas_gemv(CblasColMajor, CblasNoTrans, N-j-1, j, ATL_rnone, A+j+1, lda, A+j, lda, ATL_rone, Ac+j+1, 1); cblas_scal(N-j-1, ATL_rone/Ajj, Ac+j+1, 1); } else { Ac[j] = Ajj; return(j+1); } } Ajj = Ac[j] - cblas_dot(j, A+j, lda, A+j, lda); if (Ajj > ATL_rzero) Ac[j] = Ajj = sqrt(Ajj); else { Ac[j] = Ajj; return(N); } #else TYPE Ajj, *Ac=A; TYPE one[2] = {ATL_rone, ATL_rzero}; TYPE none[2] = {ATL_rnone, ATL_rzero}; const int N_1 = N-1, lda2 = lda<<1; int j, j2; for (j2=j=0; j != N_1; j++, j2 += 2, Ac += lda2) { Ajj = Ac[j2]; cblas_dotc_sub(j, A+j2, lda, A+j2, lda, Ac+j2); Ajj -= Ac[j2]; if (Ajj > ATL_rzero) { Ac[j2] = Ajj = sqrt(Ajj); llt_scal(j, ATL_rnone, A+j2+1, lda2); cblas_gemv(CblasColMajor, CblasNoTrans, N-j-1, j, none, A+j2+2, lda, A+j2, lda, one, Ac+j2+2, 1); llt_scal(j, ATL_rnone, A+j2+1, lda2); llt_scal((N-j-1)<<1, ATL_rone/Ajj, Ac+j2+2, 1); } else { Ac[j2] = Ajj; return(j+1); } } Ajj = Ac[j2]; cblas_dotc_sub(j, A+j2, lda, A+j2, lda, Ac+j2); Ajj -= Ac[j2]; if (Ajj > ATL_rzero) Ac[j2] = sqrt(Ajj); else { Ac[j2] = Ajj; return(N); } #endif return(0); }