X-Git-Url: http://git.maemo.org/git/?p=opencv;a=blobdiff_plain;f=3rdparty%2Flapack%2Fdorm2r.c;fp=3rdparty%2Flapack%2Fdorm2r.c;h=938f5c8fb1564f32fbd89842325326f44db8eeab;hp=0000000000000000000000000000000000000000;hb=e4c14cdbdf2fe805e79cd96ded236f57e7b89060;hpb=454138ff8a20f6edb9b65a910101403d8b520643 diff --git a/3rdparty/lapack/dorm2r.c b/3rdparty/lapack/dorm2r.c new file mode 100644 index 0000000..938f5c8 --- /dev/null +++ b/3rdparty/lapack/dorm2r.c @@ -0,0 +1,222 @@ +#include "clapack.h" + +/* Table of constant values */ + +static integer c__1 = 1; + +/* Subroutine */ int dorm2r_(char *side, char *trans, integer *m, integer *n, + integer *k, doublereal *a, integer *lda, doublereal *tau, doublereal * + c__, integer *ldc, doublereal *work, integer *info) +{ + /* System generated locals */ + integer a_dim1, a_offset, c_dim1, c_offset, i__1, i__2; + + /* Local variables */ + integer i__, i1, i2, i3, ic, jc, mi, ni, nq; + doublereal aii; + logical left; + extern /* Subroutine */ int dlarf_(char *, integer *, integer *, + doublereal *, integer *, doublereal *, doublereal *, integer *, + doublereal *); + extern logical lsame_(char *, char *); + extern /* Subroutine */ int xerbla_(char *, integer *); + logical notran; + + +/* -- LAPACK routine (version 3.1) -- */ +/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ +/* November 2006 */ + +/* .. Scalar Arguments .. */ +/* .. */ +/* .. Array Arguments .. */ +/* .. */ + +/* Purpose */ +/* ======= */ + +/* DORM2R overwrites the general real m by n matrix C with */ + +/* Q * C if SIDE = 'L' and TRANS = 'N', or */ + +/* Q'* C if SIDE = 'L' and TRANS = 'T', or */ + +/* C * Q if SIDE = 'R' and TRANS = 'N', or */ + +/* C * Q' if SIDE = 'R' and TRANS = 'T', */ + +/* where Q is a real orthogonal matrix defined as the product of k */ +/* elementary reflectors */ + +/* Q = H(1) H(2) . . . H(k) */ + +/* as returned by DGEQRF. Q is of order m if SIDE = 'L' and of order n */ +/* if SIDE = 'R'. */ + +/* Arguments */ +/* ========= */ + +/* SIDE (input) CHARACTER*1 */ +/* = 'L': apply Q or Q' from the Left */ +/* = 'R': apply Q or Q' from the Right */ + +/* TRANS (input) CHARACTER*1 */ +/* = 'N': apply Q (No transpose) */ +/* = 'T': apply Q' (Transpose) */ + +/* M (input) INTEGER */ +/* The number of rows of the matrix C. M >= 0. */ + +/* N (input) INTEGER */ +/* The number of columns of the matrix C. N >= 0. */ + +/* K (input) INTEGER */ +/* The number of elementary reflectors whose product defines */ +/* the matrix Q. */ +/* If SIDE = 'L', M >= K >= 0; */ +/* if SIDE = 'R', N >= K >= 0. */ + +/* A (input) DOUBLE PRECISION array, dimension (LDA,K) */ +/* The i-th column must contain the vector which defines the */ +/* elementary reflector H(i), for i = 1,2,...,k, as returned by */ +/* DGEQRF in the first k columns of its array argument A. */ +/* A is modified by the routine but restored on exit. */ + +/* LDA (input) INTEGER */ +/* The leading dimension of the array A. */ +/* If SIDE = 'L', LDA >= max(1,M); */ +/* if SIDE = 'R', LDA >= max(1,N). */ + +/* TAU (input) DOUBLE PRECISION array, dimension (K) */ +/* TAU(i) must contain the scalar factor of the elementary */ +/* reflector H(i), as returned by DGEQRF. */ + +/* C (input/output) DOUBLE PRECISION array, dimension (LDC,N) */ +/* On entry, the m by n matrix C. */ +/* On exit, C is overwritten by Q*C or Q'*C or C*Q' or C*Q. */ + +/* LDC (input) INTEGER */ +/* The leading dimension of the array C. LDC >= max(1,M). */ + +/* WORK (workspace) DOUBLE PRECISION array, dimension */ +/* (N) if SIDE = 'L', */ +/* (M) if SIDE = 'R' */ + +/* 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 .. */ + +/* Test the input arguments */ + + /* Parameter adjustments */ + a_dim1 = *lda; + a_offset = 1 + a_dim1; + a -= a_offset; + --tau; + c_dim1 = *ldc; + c_offset = 1 + c_dim1; + c__ -= c_offset; + --work; + + /* Function Body */ + *info = 0; + left = lsame_(side, "L"); + notran = lsame_(trans, "N"); + +/* NQ is the order of Q */ + + if (left) { + nq = *m; + } else { + nq = *n; + } + if (! left && ! lsame_(side, "R")) { + *info = -1; + } else if (! notran && ! lsame_(trans, "T")) { + *info = -2; + } else if (*m < 0) { + *info = -3; + } else if (*n < 0) { + *info = -4; + } else if (*k < 0 || *k > nq) { + *info = -5; + } else if (*lda < max(1,nq)) { + *info = -7; + } else if (*ldc < max(1,*m)) { + *info = -10; + } + if (*info != 0) { + i__1 = -(*info); + xerbla_("DORM2R", &i__1); + return 0; + } + +/* Quick return if possible */ + + if (*m == 0 || *n == 0 || *k == 0) { + return 0; + } + + if (left && ! notran || ! left && notran) { + i1 = 1; + i2 = *k; + i3 = 1; + } else { + i1 = *k; + i2 = 1; + i3 = -1; + } + + if (left) { + ni = *n; + jc = 1; + } else { + mi = *m; + ic = 1; + } + + i__1 = i2; + i__2 = i3; + for (i__ = i1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) { + if (left) { + +/* H(i) is applied to C(i:m,1:n) */ + + mi = *m - i__ + 1; + ic = i__; + } else { + +/* H(i) is applied to C(1:m,i:n) */ + + ni = *n - i__ + 1; + jc = i__; + } + +/* Apply H(i) */ + + aii = a[i__ + i__ * a_dim1]; + a[i__ + i__ * a_dim1] = 1.; + dlarf_(side, &mi, &ni, &a[i__ + i__ * a_dim1], &c__1, &tau[i__], &c__[ + ic + jc * c_dim1], ldc, &work[1]); + a[i__ + i__ * a_dim1] = aii; +/* L10: */ + } + return 0; + +/* End of DORM2R */ + +} /* dorm2r_ */