diff options
| author | shmel1k <[email protected]> | 2022-09-02 12:44:59 +0300 |
|---|---|---|
| committer | shmel1k <[email protected]> | 2022-09-02 12:44:59 +0300 |
| commit | 90d450f74722da7859d6f510a869f6c6908fd12f (patch) | |
| tree | 538c718dedc76cdfe37ad6d01ff250dd930d9278 /contrib/libs/clapack/dsytrs.c | |
| parent | 01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff) | |
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/dsytrs.c')
| -rw-r--r-- | contrib/libs/clapack/dsytrs.c | 453 |
1 files changed, 453 insertions, 0 deletions
diff --git a/contrib/libs/clapack/dsytrs.c b/contrib/libs/clapack/dsytrs.c new file mode 100644 index 00000000000..26db5a76363 --- /dev/null +++ b/contrib/libs/clapack/dsytrs.c @@ -0,0 +1,453 @@ +/* dsytrs.f -- translated by f2c (version 20061008). + You must link the resulting object file with libf2c: + on Microsoft Windows system, link with libf2c.lib; + on Linux or Unix systems, link with .../path/to/libf2c.a -lm + or, if you install libf2c.a in a standard place, with -lf2c -lm + -- in that order, at the end of the command line, as in + cc *.o -lf2c -lm + Source for libf2c is in /netlib/f2c/libf2c.zip, e.g., + + http://www.netlib.org/f2c/libf2c.zip +*/ + +#include "f2c.h" +#include "blaswrap.h" + +/* Table of constant values */ + +static doublereal c_b7 = -1.; +static integer c__1 = 1; +static doublereal c_b19 = 1.; + +/* Subroutine */ int dsytrs_(char *uplo, integer *n, integer *nrhs, + doublereal *a, integer *lda, integer *ipiv, doublereal *b, integer * + ldb, integer *info) +{ + /* System generated locals */ + integer a_dim1, a_offset, b_dim1, b_offset, i__1; + doublereal d__1; + + /* Local variables */ + integer j, k; + doublereal ak, bk; + integer kp; + doublereal akm1, bkm1; + extern /* Subroutine */ int dger_(integer *, integer *, doublereal *, + doublereal *, integer *, doublereal *, integer *, doublereal *, + integer *); + doublereal akm1k; + extern /* Subroutine */ int dscal_(integer *, doublereal *, doublereal *, + integer *); + extern logical lsame_(char *, char *); + doublereal denom; + extern /* Subroutine */ int dgemv_(char *, integer *, integer *, + doublereal *, doublereal *, integer *, doublereal *, integer *, + doublereal *, doublereal *, integer *), dswap_(integer *, + doublereal *, integer *, doublereal *, integer *); + logical upper; + extern /* Subroutine */ int xerbla_(char *, integer *); + + +/* -- LAPACK routine (version 3.2) -- */ +/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ +/* November 2006 */ + +/* .. Scalar Arguments .. */ +/* .. */ +/* .. Array Arguments .. */ +/* .. */ + +/* Purpose */ +/* ======= */ + +/* DSYTRS solves a system of linear equations A*X = B with a real */ +/* symmetric matrix A using the factorization A = U*D*U**T or */ +/* A = L*D*L**T computed by DSYTRF. */ + +/* Arguments */ +/* ========= */ + +/* UPLO (input) CHARACTER*1 */ +/* Specifies whether the details of the factorization are stored */ +/* as an upper or lower triangular matrix. */ +/* = 'U': Upper triangular, form is A = U*D*U**T; */ +/* = 'L': Lower triangular, form is A = L*D*L**T. */ + +/* N (input) INTEGER */ +/* The order of the matrix A. N >= 0. */ + +/* NRHS (input) INTEGER */ +/* The number of right hand sides, i.e., the number of columns */ +/* of the matrix B. NRHS >= 0. */ + +/* A (input) DOUBLE PRECISION array, dimension (LDA,N) */ +/* The block diagonal matrix D and the multipliers used to */ +/* obtain the factor U or L as computed by DSYTRF. */ + +/* LDA (input) INTEGER */ +/* The leading dimension of the array A. LDA >= max(1,N). */ + +/* IPIV (input) INTEGER array, dimension (N) */ +/* Details of the interchanges and the block structure of D */ +/* as determined by DSYTRF. */ + +/* B (input/output) DOUBLE PRECISION array, dimension (LDB,NRHS) */ +/* On entry, the right hand side matrix B. */ +/* On exit, the solution matrix X. */ + +/* LDB (input) INTEGER */ +/* The leading dimension of the array B. LDB >= max(1,N). */ + +/* INFO (output) INTEGER */ +/* = 0: successful exit */ +/* < 0: if INFO = -i, the i-th argument had an illegal value */ + +/* ===================================================================== */ + +/* .. Parameters .. */ +/* .. */ +/* .. Local Scalars .. */ +/* .. */ +/* .. External Functions .. */ +/* .. */ +/* .. External Subroutines .. */ +/* .. */ +/* .. Intrinsic Functions .. */ +/* .. */ +/* .. Executable Statements .. */ + + /* Parameter adjustments */ + a_dim1 = *lda; + a_offset = 1 + a_dim1; + a -= a_offset; + --ipiv; + b_dim1 = *ldb; + b_offset = 1 + b_dim1; + b -= b_offset; + + /* Function Body */ + *info = 0; + upper = lsame_(uplo, "U"); + if (! upper && ! lsame_(uplo, "L")) { + *info = -1; + } else if (*n < 0) { + *info = -2; + } else if (*nrhs < 0) { + *info = -3; + } else if (*lda < max(1,*n)) { + *info = -5; + } else if (*ldb < max(1,*n)) { + *info = -8; + } + if (*info != 0) { + i__1 = -(*info); + xerbla_("DSYTRS", &i__1); + return 0; + } + +/* Quick return if possible */ + + if (*n == 0 || *nrhs == 0) { + return 0; + } + + if (upper) { + +/* Solve A*X = B, where A = U*D*U'. */ + +/* First solve U*D*X = B, overwriting B with X. */ + +/* K is the main loop index, decreasing from N to 1 in steps of */ +/* 1 or 2, depending on the size of the diagonal blocks. */ + + k = *n; +L10: + +/* If K < 1, exit from loop. */ + + if (k < 1) { + goto L30; + } + + if (ipiv[k] > 0) { + +/* 1 x 1 diagonal block */ + +/* Interchange rows K and IPIV(K). */ + + kp = ipiv[k]; + if (kp != k) { + dswap_(nrhs, &b[k + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + +/* Multiply by inv(U(K)), where U(K) is the transformation */ +/* stored in column K of A. */ + + i__1 = k - 1; + dger_(&i__1, nrhs, &c_b7, &a[k * a_dim1 + 1], &c__1, &b[k + + b_dim1], ldb, &b[b_dim1 + 1], ldb); + +/* Multiply by the inverse of the diagonal block. */ + + d__1 = 1. / a[k + k * a_dim1]; + dscal_(nrhs, &d__1, &b[k + b_dim1], ldb); + --k; + } else { + +/* 2 x 2 diagonal block */ + +/* Interchange rows K-1 and -IPIV(K). */ + + kp = -ipiv[k]; + if (kp != k - 1) { + dswap_(nrhs, &b[k - 1 + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + +/* Multiply by inv(U(K)), where U(K) is the transformation */ +/* stored in columns K-1 and K of A. */ + + i__1 = k - 2; + dger_(&i__1, nrhs, &c_b7, &a[k * a_dim1 + 1], &c__1, &b[k + + b_dim1], ldb, &b[b_dim1 + 1], ldb); + i__1 = k - 2; + dger_(&i__1, nrhs, &c_b7, &a[(k - 1) * a_dim1 + 1], &c__1, &b[k - + 1 + b_dim1], ldb, &b[b_dim1 + 1], ldb); + +/* Multiply by the inverse of the diagonal block. */ + + akm1k = a[k - 1 + k * a_dim1]; + akm1 = a[k - 1 + (k - 1) * a_dim1] / akm1k; + ak = a[k + k * a_dim1] / akm1k; + denom = akm1 * ak - 1.; + i__1 = *nrhs; + for (j = 1; j <= i__1; ++j) { + bkm1 = b[k - 1 + j * b_dim1] / akm1k; + bk = b[k + j * b_dim1] / akm1k; + b[k - 1 + j * b_dim1] = (ak * bkm1 - bk) / denom; + b[k + j * b_dim1] = (akm1 * bk - bkm1) / denom; +/* L20: */ + } + k += -2; + } + + goto L10; +L30: + +/* Next solve U'*X = B, overwriting B with X. */ + +/* K is the main loop index, increasing from 1 to N in steps of */ +/* 1 or 2, depending on the size of the diagonal blocks. */ + + k = 1; +L40: + +/* If K > N, exit from loop. */ + + if (k > *n) { + goto L50; + } + + if (ipiv[k] > 0) { + +/* 1 x 1 diagonal block */ + +/* Multiply by inv(U'(K)), where U(K) is the transformation */ +/* stored in column K of A. */ + + i__1 = k - 1; + dgemv_("Transpose", &i__1, nrhs, &c_b7, &b[b_offset], ldb, &a[k * + a_dim1 + 1], &c__1, &c_b19, &b[k + b_dim1], ldb); + +/* Interchange rows K and IPIV(K). */ + + kp = ipiv[k]; + if (kp != k) { + dswap_(nrhs, &b[k + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + ++k; + } else { + +/* 2 x 2 diagonal block */ + +/* Multiply by inv(U'(K+1)), where U(K+1) is the transformation */ +/* stored in columns K and K+1 of A. */ + + i__1 = k - 1; + dgemv_("Transpose", &i__1, nrhs, &c_b7, &b[b_offset], ldb, &a[k * + a_dim1 + 1], &c__1, &c_b19, &b[k + b_dim1], ldb); + i__1 = k - 1; + dgemv_("Transpose", &i__1, nrhs, &c_b7, &b[b_offset], ldb, &a[(k + + 1) * a_dim1 + 1], &c__1, &c_b19, &b[k + 1 + b_dim1], + ldb); + +/* Interchange rows K and -IPIV(K). */ + + kp = -ipiv[k]; + if (kp != k) { + dswap_(nrhs, &b[k + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + k += 2; + } + + goto L40; +L50: + + ; + } else { + +/* Solve A*X = B, where A = L*D*L'. */ + +/* First solve L*D*X = B, overwriting B with X. */ + +/* K is the main loop index, increasing from 1 to N in steps of */ +/* 1 or 2, depending on the size of the diagonal blocks. */ + + k = 1; +L60: + +/* If K > N, exit from loop. */ + + if (k > *n) { + goto L80; + } + + if (ipiv[k] > 0) { + +/* 1 x 1 diagonal block */ + +/* Interchange rows K and IPIV(K). */ + + kp = ipiv[k]; + if (kp != k) { + dswap_(nrhs, &b[k + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + +/* Multiply by inv(L(K)), where L(K) is the transformation */ +/* stored in column K of A. */ + + if (k < *n) { + i__1 = *n - k; + dger_(&i__1, nrhs, &c_b7, &a[k + 1 + k * a_dim1], &c__1, &b[k + + b_dim1], ldb, &b[k + 1 + b_dim1], ldb); + } + +/* Multiply by the inverse of the diagonal block. */ + + d__1 = 1. / a[k + k * a_dim1]; + dscal_(nrhs, &d__1, &b[k + b_dim1], ldb); + ++k; + } else { + +/* 2 x 2 diagonal block */ + +/* Interchange rows K+1 and -IPIV(K). */ + + kp = -ipiv[k]; + if (kp != k + 1) { + dswap_(nrhs, &b[k + 1 + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + +/* Multiply by inv(L(K)), where L(K) is the transformation */ +/* stored in columns K and K+1 of A. */ + + if (k < *n - 1) { + i__1 = *n - k - 1; + dger_(&i__1, nrhs, &c_b7, &a[k + 2 + k * a_dim1], &c__1, &b[k + + b_dim1], ldb, &b[k + 2 + b_dim1], ldb); + i__1 = *n - k - 1; + dger_(&i__1, nrhs, &c_b7, &a[k + 2 + (k + 1) * a_dim1], &c__1, + &b[k + 1 + b_dim1], ldb, &b[k + 2 + b_dim1], ldb); + } + +/* Multiply by the inverse of the diagonal block. */ + + akm1k = a[k + 1 + k * a_dim1]; + akm1 = a[k + k * a_dim1] / akm1k; + ak = a[k + 1 + (k + 1) * a_dim1] / akm1k; + denom = akm1 * ak - 1.; + i__1 = *nrhs; + for (j = 1; j <= i__1; ++j) { + bkm1 = b[k + j * b_dim1] / akm1k; + bk = b[k + 1 + j * b_dim1] / akm1k; + b[k + j * b_dim1] = (ak * bkm1 - bk) / denom; + b[k + 1 + j * b_dim1] = (akm1 * bk - bkm1) / denom; +/* L70: */ + } + k += 2; + } + + goto L60; +L80: + +/* Next solve L'*X = B, overwriting B with X. */ + +/* K is the main loop index, decreasing from N to 1 in steps of */ +/* 1 or 2, depending on the size of the diagonal blocks. */ + + k = *n; +L90: + +/* If K < 1, exit from loop. */ + + if (k < 1) { + goto L100; + } + + if (ipiv[k] > 0) { + +/* 1 x 1 diagonal block */ + +/* Multiply by inv(L'(K)), where L(K) is the transformation */ +/* stored in column K of A. */ + + if (k < *n) { + i__1 = *n - k; + dgemv_("Transpose", &i__1, nrhs, &c_b7, &b[k + 1 + b_dim1], + ldb, &a[k + 1 + k * a_dim1], &c__1, &c_b19, &b[k + + b_dim1], ldb); + } + +/* Interchange rows K and IPIV(K). */ + + kp = ipiv[k]; + if (kp != k) { + dswap_(nrhs, &b[k + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + --k; + } else { + +/* 2 x 2 diagonal block */ + +/* Multiply by inv(L'(K-1)), where L(K-1) is the transformation */ +/* stored in columns K-1 and K of A. */ + + if (k < *n) { + i__1 = *n - k; + dgemv_("Transpose", &i__1, nrhs, &c_b7, &b[k + 1 + b_dim1], + ldb, &a[k + 1 + k * a_dim1], &c__1, &c_b19, &b[k + + b_dim1], ldb); + i__1 = *n - k; + dgemv_("Transpose", &i__1, nrhs, &c_b7, &b[k + 1 + b_dim1], + ldb, &a[k + 1 + (k - 1) * a_dim1], &c__1, &c_b19, &b[ + k - 1 + b_dim1], ldb); + } + +/* Interchange rows K and -IPIV(K). */ + + kp = -ipiv[k]; + if (kp != k) { + dswap_(nrhs, &b[k + b_dim1], ldb, &b[kp + b_dim1], ldb); + } + k += -2; + } + + goto L90; +L100: + ; + } + + return 0; + +/* End of DSYTRS */ + +} /* dsytrs_ */ |
