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authorshmel1k <shmel1k@ydb.tech>2022-09-02 12:44:59 +0300
committershmel1k <shmel1k@ydb.tech>2022-09-02 12:44:59 +0300
commit90d450f74722da7859d6f510a869f6c6908fd12f (patch)
tree538c718dedc76cdfe37ad6d01ff250dd930d9278 /contrib/libs/clapack/ztrti2.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
Diffstat (limited to 'contrib/libs/clapack/ztrti2.c')
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1 files changed, 198 insertions, 0 deletions
diff --git a/contrib/libs/clapack/ztrti2.c b/contrib/libs/clapack/ztrti2.c
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+/* ztrti2.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 doublecomplex c_b1 = {1.,0.};
+static integer c__1 = 1;
+
+/* Subroutine */ int ztrti2_(char *uplo, char *diag, integer *n,
+ doublecomplex *a, integer *lda, integer *info)
+{
+ /* System generated locals */
+ integer a_dim1, a_offset, i__1, i__2;
+ doublecomplex z__1;
+
+ /* Builtin functions */
+ void z_div(doublecomplex *, doublecomplex *, doublecomplex *);
+
+ /* Local variables */
+ integer j;
+ doublecomplex ajj;
+ extern logical lsame_(char *, char *);
+ extern /* Subroutine */ int zscal_(integer *, doublecomplex *,
+ doublecomplex *, integer *);
+ logical upper;
+ extern /* Subroutine */ int ztrmv_(char *, char *, char *, integer *,
+ doublecomplex *, integer *, doublecomplex *, integer *), xerbla_(char *, integer *);
+ logical nounit;
+
+
+/* -- LAPACK routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* ZTRTI2 computes the inverse of a complex upper or lower triangular */
+/* matrix. */
+
+/* This is the Level 2 BLAS version of the algorithm. */
+
+/* Arguments */
+/* ========= */
+
+/* UPLO (input) CHARACTER*1 */
+/* Specifies whether the matrix A is upper or lower triangular. */
+/* = 'U': Upper triangular */
+/* = 'L': Lower triangular */
+
+/* DIAG (input) CHARACTER*1 */
+/* Specifies whether or not the matrix A is unit triangular. */
+/* = 'N': Non-unit triangular */
+/* = 'U': Unit triangular */
+
+/* N (input) INTEGER */
+/* The order of the matrix A. N >= 0. */
+
+/* A (input/output) COMPLEX*16 array, dimension (LDA,N) */
+/* On entry, the triangular matrix A. If UPLO = 'U', the */
+/* leading n by n upper triangular part of the array A contains */
+/* the upper triangular matrix, and the strictly lower */
+/* triangular part of A is not referenced. If UPLO = 'L', the */
+/* leading n by n lower triangular part of the array A contains */
+/* the lower triangular matrix, and the strictly upper */
+/* triangular part of A is not referenced. If DIAG = 'U', the */
+/* diagonal elements of A are also not referenced and are */
+/* assumed to be 1. */
+
+/* On exit, the (triangular) inverse of the original matrix, in */
+/* the same storage format. */
+
+/* LDA (input) INTEGER */
+/* The leading dimension of the array A. LDA >= max(1,N). */
+
+/* INFO (output) INTEGER */
+/* = 0: successful exit */
+/* < 0: if INFO = -k, the k-th argument had an illegal value */
+
+/* ===================================================================== */
+
+/* .. Parameters .. */
+/* .. */
+/* .. Local Scalars .. */
+/* .. */
+/* .. External Functions .. */
+/* .. */
+/* .. External Subroutines .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. Executable Statements .. */
+
+/* Test the input parameters. */
+
+ /* Parameter adjustments */
+ a_dim1 = *lda;
+ a_offset = 1 + a_dim1;
+ a -= a_offset;
+
+ /* Function Body */
+ *info = 0;
+ upper = lsame_(uplo, "U");
+ nounit = lsame_(diag, "N");
+ if (! upper && ! lsame_(uplo, "L")) {
+ *info = -1;
+ } else if (! nounit && ! lsame_(diag, "U")) {
+ *info = -2;
+ } else if (*n < 0) {
+ *info = -3;
+ } else if (*lda < max(1,*n)) {
+ *info = -5;
+ }
+ if (*info != 0) {
+ i__1 = -(*info);
+ xerbla_("ZTRTI2", &i__1);
+ return 0;
+ }
+
+ if (upper) {
+
+/* Compute inverse of upper triangular matrix. */
+
+ i__1 = *n;
+ for (j = 1; j <= i__1; ++j) {
+ if (nounit) {
+ i__2 = j + j * a_dim1;
+ z_div(&z__1, &c_b1, &a[j + j * a_dim1]);
+ a[i__2].r = z__1.r, a[i__2].i = z__1.i;
+ i__2 = j + j * a_dim1;
+ z__1.r = -a[i__2].r, z__1.i = -a[i__2].i;
+ ajj.r = z__1.r, ajj.i = z__1.i;
+ } else {
+ z__1.r = -1., z__1.i = -0.;
+ ajj.r = z__1.r, ajj.i = z__1.i;
+ }
+
+/* Compute elements 1:j-1 of j-th column. */
+
+ i__2 = j - 1;
+ ztrmv_("Upper", "No transpose", diag, &i__2, &a[a_offset], lda, &
+ a[j * a_dim1 + 1], &c__1);
+ i__2 = j - 1;
+ zscal_(&i__2, &ajj, &a[j * a_dim1 + 1], &c__1);
+/* L10: */
+ }
+ } else {
+
+/* Compute inverse of lower triangular matrix. */
+
+ for (j = *n; j >= 1; --j) {
+ if (nounit) {
+ i__1 = j + j * a_dim1;
+ z_div(&z__1, &c_b1, &a[j + j * a_dim1]);
+ a[i__1].r = z__1.r, a[i__1].i = z__1.i;
+ i__1 = j + j * a_dim1;
+ z__1.r = -a[i__1].r, z__1.i = -a[i__1].i;
+ ajj.r = z__1.r, ajj.i = z__1.i;
+ } else {
+ z__1.r = -1., z__1.i = -0.;
+ ajj.r = z__1.r, ajj.i = z__1.i;
+ }
+ if (j < *n) {
+
+/* Compute elements j+1:n of j-th column. */
+
+ i__1 = *n - j;
+ ztrmv_("Lower", "No transpose", diag, &i__1, &a[j + 1 + (j +
+ 1) * a_dim1], lda, &a[j + 1 + j * a_dim1], &c__1);
+ i__1 = *n - j;
+ zscal_(&i__1, &ajj, &a[j + 1 + j * a_dim1], &c__1);
+ }
+/* L20: */
+ }
+ }
+
+ return 0;
+
+/* End of ZTRTI2 */
+
+} /* ztrti2_ */