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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/clatrd.c
parent01f64c1ecd0d4ffa9e3a74478335f1745f26cc75 (diff)
downloadydb-90d450f74722da7859d6f510a869f6c6908fd12f.tar.gz
[] add metering mode to CLI
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+/* clatrd.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 complex c_b1 = {0.f,0.f};
+static complex c_b2 = {1.f,0.f};
+static integer c__1 = 1;
+
+/* Subroutine */ int clatrd_(char *uplo, integer *n, integer *nb, complex *a,
+ integer *lda, real *e, complex *tau, complex *w, integer *ldw)
+{
+ /* System generated locals */
+ integer a_dim1, a_offset, w_dim1, w_offset, i__1, i__2, i__3;
+ real r__1;
+ complex q__1, q__2, q__3, q__4;
+
+ /* Local variables */
+ integer i__, iw;
+ complex alpha;
+ extern /* Subroutine */ int cscal_(integer *, complex *, complex *,
+ integer *);
+ extern /* Complex */ VOID cdotc_(complex *, integer *, complex *, integer
+ *, complex *, integer *);
+ extern /* Subroutine */ int cgemv_(char *, integer *, integer *, complex *
+, complex *, integer *, complex *, integer *, complex *, complex *
+, integer *), chemv_(char *, integer *, complex *,
+ complex *, integer *, complex *, integer *, complex *, complex *,
+ integer *);
+ extern logical lsame_(char *, char *);
+ extern /* Subroutine */ int caxpy_(integer *, complex *, complex *,
+ integer *, complex *, integer *), clarfg_(integer *, complex *,
+ complex *, integer *, complex *), clacgv_(integer *, complex *,
+ integer *);
+
+
+/* -- LAPACK auxiliary routine (version 3.2) -- */
+/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/* November 2006 */
+
+/* .. Scalar Arguments .. */
+/* .. */
+/* .. Array Arguments .. */
+/* .. */
+
+/* Purpose */
+/* ======= */
+
+/* CLATRD reduces NB rows and columns of a complex Hermitian matrix A to */
+/* Hermitian tridiagonal form by a unitary similarity */
+/* transformation Q' * A * Q, and returns the matrices V and W which are */
+/* needed to apply the transformation to the unreduced part of A. */
+
+/* If UPLO = 'U', CLATRD reduces the last NB rows and columns of a */
+/* matrix, of which the upper triangle is supplied; */
+/* if UPLO = 'L', CLATRD reduces the first NB rows and columns of a */
+/* matrix, of which the lower triangle is supplied. */
+
+/* This is an auxiliary routine called by CHETRD. */
+
+/* Arguments */
+/* ========= */
+
+/* UPLO (input) CHARACTER*1 */
+/* Specifies whether the upper or lower triangular part of the */
+/* Hermitian matrix A is stored: */
+/* = 'U': Upper triangular */
+/* = 'L': Lower triangular */
+
+/* N (input) INTEGER */
+/* The order of the matrix A. */
+
+/* NB (input) INTEGER */
+/* The number of rows and columns to be reduced. */
+
+/* A (input/output) COMPLEX array, dimension (LDA,N) */
+/* On entry, the Hermitian matrix A. If UPLO = 'U', the leading */
+/* n-by-n upper triangular part of A contains the upper */
+/* triangular part of the matrix A, and the strictly lower */
+/* triangular part of A is not referenced. If UPLO = 'L', the */
+/* leading n-by-n lower triangular part of A contains the lower */
+/* triangular part of the matrix A, and the strictly upper */
+/* triangular part of A is not referenced. */
+/* On exit: */
+/* if UPLO = 'U', the last NB columns have been reduced to */
+/* tridiagonal form, with the diagonal elements overwriting */
+/* the diagonal elements of A; the elements above the diagonal */
+/* with the array TAU, represent the unitary matrix Q as a */
+/* product of elementary reflectors; */
+/* if UPLO = 'L', the first NB columns have been reduced to */
+/* tridiagonal form, with the diagonal elements overwriting */
+/* the diagonal elements of A; the elements below the diagonal */
+/* with the array TAU, represent the unitary matrix Q as a */
+/* product of elementary reflectors. */
+/* See Further Details. */
+
+/* LDA (input) INTEGER */
+/* The leading dimension of the array A. LDA >= max(1,N). */
+
+/* E (output) REAL array, dimension (N-1) */
+/* If UPLO = 'U', E(n-nb:n-1) contains the superdiagonal */
+/* elements of the last NB columns of the reduced matrix; */
+/* if UPLO = 'L', E(1:nb) contains the subdiagonal elements of */
+/* the first NB columns of the reduced matrix. */
+
+/* TAU (output) COMPLEX array, dimension (N-1) */
+/* The scalar factors of the elementary reflectors, stored in */
+/* TAU(n-nb:n-1) if UPLO = 'U', and in TAU(1:nb) if UPLO = 'L'. */
+/* See Further Details. */
+
+/* W (output) COMPLEX array, dimension (LDW,NB) */
+/* The n-by-nb matrix W required to update the unreduced part */
+/* of A. */
+
+/* LDW (input) INTEGER */
+/* The leading dimension of the array W. LDW >= max(1,N). */
+
+/* Further Details */
+/* =============== */
+
+/* If UPLO = 'U', the matrix Q is represented as a product of elementary */
+/* reflectors */
+
+/* Q = H(n) H(n-1) . . . H(n-nb+1). */
+
+/* Each H(i) has the form */
+
+/* H(i) = I - tau * v * v' */
+
+/* where tau is a complex scalar, and v is a complex vector with */
+/* v(i:n) = 0 and v(i-1) = 1; v(1:i-1) is stored on exit in A(1:i-1,i), */
+/* and tau in TAU(i-1). */
+
+/* If UPLO = 'L', the matrix Q is represented as a product of elementary */
+/* reflectors */
+
+/* Q = H(1) H(2) . . . H(nb). */
+
+/* Each H(i) has the form */
+
+/* H(i) = I - tau * v * v' */
+
+/* where tau is a complex scalar, and v is a complex vector with */
+/* v(1:i) = 0 and v(i+1) = 1; v(i+1:n) is stored on exit in A(i+1:n,i), */
+/* and tau in TAU(i). */
+
+/* The elements of the vectors v together form the n-by-nb matrix V */
+/* which is needed, with W, to apply the transformation to the unreduced */
+/* part of the matrix, using a Hermitian rank-2k update of the form: */
+/* A := A - V*W' - W*V'. */
+
+/* The contents of A on exit are illustrated by the following examples */
+/* with n = 5 and nb = 2: */
+
+/* if UPLO = 'U': if UPLO = 'L': */
+
+/* ( a a a v4 v5 ) ( d ) */
+/* ( a a v4 v5 ) ( 1 d ) */
+/* ( a 1 v5 ) ( v1 1 a ) */
+/* ( d 1 ) ( v1 v2 a a ) */
+/* ( d ) ( v1 v2 a a a ) */
+
+/* where d denotes a diagonal element of the reduced matrix, a denotes */
+/* an element of the original matrix that is unchanged, and vi denotes */
+/* an element of the vector defining H(i). */
+
+/* ===================================================================== */
+
+/* .. Parameters .. */
+/* .. */
+/* .. Local Scalars .. */
+/* .. */
+/* .. External Subroutines .. */
+/* .. */
+/* .. External Functions .. */
+/* .. */
+/* .. Intrinsic Functions .. */
+/* .. */
+/* .. Executable Statements .. */
+
+/* Quick return if possible */
+
+ /* Parameter adjustments */
+ a_dim1 = *lda;
+ a_offset = 1 + a_dim1;
+ a -= a_offset;
+ --e;
+ --tau;
+ w_dim1 = *ldw;
+ w_offset = 1 + w_dim1;
+ w -= w_offset;
+
+ /* Function Body */
+ if (*n <= 0) {
+ return 0;
+ }
+
+ if (lsame_(uplo, "U")) {
+
+/* Reduce last NB columns of upper triangle */
+
+ i__1 = *n - *nb + 1;
+ for (i__ = *n; i__ >= i__1; --i__) {
+ iw = i__ - *n + *nb;
+ if (i__ < *n) {
+
+/* Update A(1:i,i) */
+
+ i__2 = i__ + i__ * a_dim1;
+ i__3 = i__ + i__ * a_dim1;
+ r__1 = a[i__3].r;
+ a[i__2].r = r__1, a[i__2].i = 0.f;
+ i__2 = *n - i__;
+ clacgv_(&i__2, &w[i__ + (iw + 1) * w_dim1], ldw);
+ i__2 = *n - i__;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__, &i__2, &q__1, &a[(i__ + 1) *
+ a_dim1 + 1], lda, &w[i__ + (iw + 1) * w_dim1], ldw, &
+ c_b2, &a[i__ * a_dim1 + 1], &c__1);
+ i__2 = *n - i__;
+ clacgv_(&i__2, &w[i__ + (iw + 1) * w_dim1], ldw);
+ i__2 = *n - i__;
+ clacgv_(&i__2, &a[i__ + (i__ + 1) * a_dim1], lda);
+ i__2 = *n - i__;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__, &i__2, &q__1, &w[(iw + 1) *
+ w_dim1 + 1], ldw, &a[i__ + (i__ + 1) * a_dim1], lda, &
+ c_b2, &a[i__ * a_dim1 + 1], &c__1);
+ i__2 = *n - i__;
+ clacgv_(&i__2, &a[i__ + (i__ + 1) * a_dim1], lda);
+ i__2 = i__ + i__ * a_dim1;
+ i__3 = i__ + i__ * a_dim1;
+ r__1 = a[i__3].r;
+ a[i__2].r = r__1, a[i__2].i = 0.f;
+ }
+ if (i__ > 1) {
+
+/* Generate elementary reflector H(i) to annihilate */
+/* A(1:i-2,i) */
+
+ i__2 = i__ - 1 + i__ * a_dim1;
+ alpha.r = a[i__2].r, alpha.i = a[i__2].i;
+ i__2 = i__ - 1;
+ clarfg_(&i__2, &alpha, &a[i__ * a_dim1 + 1], &c__1, &tau[i__
+ - 1]);
+ i__2 = i__ - 1;
+ e[i__2] = alpha.r;
+ i__2 = i__ - 1 + i__ * a_dim1;
+ a[i__2].r = 1.f, a[i__2].i = 0.f;
+
+/* Compute W(1:i-1,i) */
+
+ i__2 = i__ - 1;
+ chemv_("Upper", &i__2, &c_b2, &a[a_offset], lda, &a[i__ *
+ a_dim1 + 1], &c__1, &c_b1, &w[iw * w_dim1 + 1], &c__1);
+ if (i__ < *n) {
+ i__2 = i__ - 1;
+ i__3 = *n - i__;
+ cgemv_("Conjugate transpose", &i__2, &i__3, &c_b2, &w[(iw
+ + 1) * w_dim1 + 1], ldw, &a[i__ * a_dim1 + 1], &
+ c__1, &c_b1, &w[i__ + 1 + iw * w_dim1], &c__1);
+ i__2 = i__ - 1;
+ i__3 = *n - i__;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__2, &i__3, &q__1, &a[(i__ + 1) *
+ a_dim1 + 1], lda, &w[i__ + 1 + iw * w_dim1], &
+ c__1, &c_b2, &w[iw * w_dim1 + 1], &c__1);
+ i__2 = i__ - 1;
+ i__3 = *n - i__;
+ cgemv_("Conjugate transpose", &i__2, &i__3, &c_b2, &a[(
+ i__ + 1) * a_dim1 + 1], lda, &a[i__ * a_dim1 + 1],
+ &c__1, &c_b1, &w[i__ + 1 + iw * w_dim1], &c__1);
+ i__2 = i__ - 1;
+ i__3 = *n - i__;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__2, &i__3, &q__1, &w[(iw + 1) *
+ w_dim1 + 1], ldw, &w[i__ + 1 + iw * w_dim1], &
+ c__1, &c_b2, &w[iw * w_dim1 + 1], &c__1);
+ }
+ i__2 = i__ - 1;
+ cscal_(&i__2, &tau[i__ - 1], &w[iw * w_dim1 + 1], &c__1);
+ q__3.r = -.5f, q__3.i = -0.f;
+ i__2 = i__ - 1;
+ q__2.r = q__3.r * tau[i__2].r - q__3.i * tau[i__2].i, q__2.i =
+ q__3.r * tau[i__2].i + q__3.i * tau[i__2].r;
+ i__3 = i__ - 1;
+ cdotc_(&q__4, &i__3, &w[iw * w_dim1 + 1], &c__1, &a[i__ *
+ a_dim1 + 1], &c__1);
+ q__1.r = q__2.r * q__4.r - q__2.i * q__4.i, q__1.i = q__2.r *
+ q__4.i + q__2.i * q__4.r;
+ alpha.r = q__1.r, alpha.i = q__1.i;
+ i__2 = i__ - 1;
+ caxpy_(&i__2, &alpha, &a[i__ * a_dim1 + 1], &c__1, &w[iw *
+ w_dim1 + 1], &c__1);
+ }
+
+/* L10: */
+ }
+ } else {
+
+/* Reduce first NB columns of lower triangle */
+
+ i__1 = *nb;
+ for (i__ = 1; i__ <= i__1; ++i__) {
+
+/* Update A(i:n,i) */
+
+ i__2 = i__ + i__ * a_dim1;
+ i__3 = i__ + i__ * a_dim1;
+ r__1 = a[i__3].r;
+ a[i__2].r = r__1, a[i__2].i = 0.f;
+ i__2 = i__ - 1;
+ clacgv_(&i__2, &w[i__ + w_dim1], ldw);
+ i__2 = *n - i__ + 1;
+ i__3 = i__ - 1;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__2, &i__3, &q__1, &a[i__ + a_dim1], lda,
+ &w[i__ + w_dim1], ldw, &c_b2, &a[i__ + i__ * a_dim1], &
+ c__1);
+ i__2 = i__ - 1;
+ clacgv_(&i__2, &w[i__ + w_dim1], ldw);
+ i__2 = i__ - 1;
+ clacgv_(&i__2, &a[i__ + a_dim1], lda);
+ i__2 = *n - i__ + 1;
+ i__3 = i__ - 1;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__2, &i__3, &q__1, &w[i__ + w_dim1], ldw,
+ &a[i__ + a_dim1], lda, &c_b2, &a[i__ + i__ * a_dim1], &
+ c__1);
+ i__2 = i__ - 1;
+ clacgv_(&i__2, &a[i__ + a_dim1], lda);
+ i__2 = i__ + i__ * a_dim1;
+ i__3 = i__ + i__ * a_dim1;
+ r__1 = a[i__3].r;
+ a[i__2].r = r__1, a[i__2].i = 0.f;
+ if (i__ < *n) {
+
+/* Generate elementary reflector H(i) to annihilate */
+/* A(i+2:n,i) */
+
+ i__2 = i__ + 1 + i__ * a_dim1;
+ alpha.r = a[i__2].r, alpha.i = a[i__2].i;
+ i__2 = *n - i__;
+/* Computing MIN */
+ i__3 = i__ + 2;
+ clarfg_(&i__2, &alpha, &a[min(i__3, *n)+ i__ * a_dim1], &c__1,
+ &tau[i__]);
+ i__2 = i__;
+ e[i__2] = alpha.r;
+ i__2 = i__ + 1 + i__ * a_dim1;
+ a[i__2].r = 1.f, a[i__2].i = 0.f;
+
+/* Compute W(i+1:n,i) */
+
+ i__2 = *n - i__;
+ chemv_("Lower", &i__2, &c_b2, &a[i__ + 1 + (i__ + 1) * a_dim1]
+, lda, &a[i__ + 1 + i__ * a_dim1], &c__1, &c_b1, &w[
+ i__ + 1 + i__ * w_dim1], &c__1);
+ i__2 = *n - i__;
+ i__3 = i__ - 1;
+ cgemv_("Conjugate transpose", &i__2, &i__3, &c_b2, &w[i__ + 1
+ + w_dim1], ldw, &a[i__ + 1 + i__ * a_dim1], &c__1, &
+ c_b1, &w[i__ * w_dim1 + 1], &c__1);
+ i__2 = *n - i__;
+ i__3 = i__ - 1;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__2, &i__3, &q__1, &a[i__ + 1 +
+ a_dim1], lda, &w[i__ * w_dim1 + 1], &c__1, &c_b2, &w[
+ i__ + 1 + i__ * w_dim1], &c__1);
+ i__2 = *n - i__;
+ i__3 = i__ - 1;
+ cgemv_("Conjugate transpose", &i__2, &i__3, &c_b2, &a[i__ + 1
+ + a_dim1], lda, &a[i__ + 1 + i__ * a_dim1], &c__1, &
+ c_b1, &w[i__ * w_dim1 + 1], &c__1);
+ i__2 = *n - i__;
+ i__3 = i__ - 1;
+ q__1.r = -1.f, q__1.i = -0.f;
+ cgemv_("No transpose", &i__2, &i__3, &q__1, &w[i__ + 1 +
+ w_dim1], ldw, &w[i__ * w_dim1 + 1], &c__1, &c_b2, &w[
+ i__ + 1 + i__ * w_dim1], &c__1);
+ i__2 = *n - i__;
+ cscal_(&i__2, &tau[i__], &w[i__ + 1 + i__ * w_dim1], &c__1);
+ q__3.r = -.5f, q__3.i = -0.f;
+ i__2 = i__;
+ q__2.r = q__3.r * tau[i__2].r - q__3.i * tau[i__2].i, q__2.i =
+ q__3.r * tau[i__2].i + q__3.i * tau[i__2].r;
+ i__3 = *n - i__;
+ cdotc_(&q__4, &i__3, &w[i__ + 1 + i__ * w_dim1], &c__1, &a[
+ i__ + 1 + i__ * a_dim1], &c__1);
+ q__1.r = q__2.r * q__4.r - q__2.i * q__4.i, q__1.i = q__2.r *
+ q__4.i + q__2.i * q__4.r;
+ alpha.r = q__1.r, alpha.i = q__1.i;
+ i__2 = *n - i__;
+ caxpy_(&i__2, &alpha, &a[i__ + 1 + i__ * a_dim1], &c__1, &w[
+ i__ + 1 + i__ * w_dim1], &c__1);
+ }
+
+/* L20: */
+ }
+ }
+
+ return 0;
+
+/* End of CLATRD */
+
+} /* clatrd_ */