text: /* cunmtr.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 integer c__1 = 1;
  static integer c_n1 = -1;
  static integer c__2 = 2;
  
  /* Subroutine */ int cunmtr_(char *side, char *uplo, char *trans, integer *m, 
  	integer *n, complex *a, integer *lda, complex *tau, complex *c__, 
  	integer *ldc, complex *work, integer *lwork, integer *info)
  {
      /* System generated locals */
      address a__1[2];
      integer a_dim1, a_offset, c_dim1, c_offset, i__1[2], i__2, i__3;
      char ch__1[2];
  
      /* Builtin functions */
      /* Subroutine */ int s_cat(char *, char **, integer *, integer *, ftnlen);
  
      /* Local variables */
      integer i1, i2, nb, mi, ni, nq, nw;
      logical left;
      extern logical lsame_(char *, char *);
      integer iinfo;
      logical upper;
      extern /* Subroutine */ int xerbla_(char *, integer *);
      extern integer ilaenv_(integer *, char *, char *, integer *, integer *, 
  	    integer *, integer *);
      extern /* Subroutine */ int cunmql_(char *, char *, integer *, integer *, 
  	    integer *, complex *, integer *, complex *, complex *, integer *, 
  	    complex *, integer *, integer *), cunmqr_(char *, 
  	    char *, integer *, integer *, integer *, complex *, integer *, 
  	    complex *, complex *, integer *, complex *, integer *, integer *);
      integer lwkopt;
      logical lquery;
  
  
  /*  -- LAPACK routine (version 3.2) -- */
  /*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
  /*     November 2006 */
  
  /*     .. Scalar Arguments .. */
  /*     .. */
  /*     .. Array Arguments .. */
  /*     .. */
  
  /*  Purpose */
  /*  ======= */
  
  /*  CUNMTR overwrites the general complex M-by-N matrix C with */
  
  /*                  SIDE = 'L'     SIDE = 'R' */
  /*  TRANS = 'N':      Q * C          C * Q */
  /*  TRANS = 'C':      Q**H * C       C * Q**H */
  
  /*  where Q is a complex unitary matrix of order nq, with nq = m if */
  /*  SIDE = 'L' and nq = n if SIDE = 'R'. Q is defined as the product of */
  /*  nq-1 elementary reflectors, as returned by CHETRD: */
  
  /*  if UPLO = 'U', Q = H(nq-1) . . . H(2) H(1); */
  
  /*  if UPLO = 'L', Q = H(1) H(2) . . . H(nq-1). */
  
  /*  Arguments */
  /*  ========= */
  
  /*  SIDE    (input) CHARACTER*1 */
  /*          = 'L': apply Q or Q**H from the Left; */
  /*          = 'R': apply Q or Q**H from the Right. */
  
  /*  UPLO    (input) CHARACTER*1 */
  /*          = 'U': Upper triangle of A contains elementary reflectors */
  /*                 from CHETRD; */
  /*          = 'L': Lower triangle of A contains elementary reflectors */
  /*                 from CHETRD. */
  
  /*  TRANS   (input) CHARACTER*1 */
  /*          = 'N':  No transpose, apply Q; */
  /*          = 'C':  Conjugate transpose, apply Q**H. */
  
  /*  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. */
  
  /*  A       (input) COMPLEX array, dimension */
  /*                               (LDA,M) if SIDE = 'L' */
  /*                               (LDA,N) if SIDE = 'R' */
  /*          The vectors which define the elementary reflectors, as */
  /*          returned by CHETRD. */
  
  /*  LDA     (input) INTEGER */
  /*          The leading dimension of the array A. */
  /*          LDA >= max(1,M) if SIDE = 'L'; LDA >= max(1,N) if SIDE = 'R'. */
  
  /*  TAU     (input) COMPLEX array, dimension */
  /*                               (M-1) if SIDE = 'L' */
  /*                               (N-1) if SIDE = 'R' */
  /*          TAU(i) must contain the scalar factor of the elementary */
  /*          reflector H(i), as returned by CHETRD. */
  
  /*  C       (input/output) COMPLEX array, dimension (LDC,N) */
  /*          On entry, the M-by-N matrix C. */
  /*          On exit, C is overwritten by Q*C or Q**H*C or C*Q**H or C*Q. */
  
  /*  LDC     (input) INTEGER */
  /*          The leading dimension of the array C. LDC >= max(1,M). */
  
  /*  WORK    (workspace/output) COMPLEX array, dimension (MAX(1,LWORK)) */
  /*          On exit, if INFO = 0, WORK(1) returns the optimal LWORK. */
  
  /*  LWORK   (input) INTEGER */
  /*          The dimension of the array WORK. */
  /*          If SIDE = 'L', LWORK >= max(1,N); */
  /*          if SIDE = 'R', LWORK >= max(1,M). */
  /*          For optimum performance LWORK >= N*NB if SIDE = 'L', and */
  /*          LWORK >=M*NB if SIDE = 'R', where NB is the optimal */
  /*          blocksize. */
  
  /*          If LWORK = -1, then a workspace query is assumed; the routine */
  /*          only calculates the optimal size of the WORK array, returns */
  /*          this value as the first entry of the WORK array, and no error */
  /*          message related to LWORK is issued by XERBLA. */
  
  /*  INFO    (output) INTEGER */
  /*          = 0:  successful exit */
  /*          < 0:  if INFO = -i, the i-th argument had an illegal value */
  
  /*  ===================================================================== */
  
  /*     .. 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");
      upper = lsame_(uplo, "U");
      lquery = *lwork == -1;
  
  /*     NQ is the order of Q and NW is the minimum dimension of WORK */
  
      if (left) {
  	nq = *m;
  	nw = *n;
      } else {
  	nq = *n;
  	nw = *m;
      }
      if (! left && ! lsame_(side, "R")) {
  	*info = -1;
      } else if (! upper && ! lsame_(uplo, "L")) {
  	*info = -2;
      } else if (! lsame_(trans, "N") && ! lsame_(trans, 
  	    "C")) {
  	*info = -3;
      } else if (*m < 0) {
  	*info = -4;
      } else if (*n < 0) {
  	*info = -5;
      } else if (*lda < max(1,nq)) {
  	*info = -7;
      } else if (*ldc < max(1,*m)) {
  	*info = -10;
      } else if (*lwork < max(1,nw) && ! lquery) {
  	*info = -12;
      }
  
      if (*info == 0) {
  	if (upper) {
  	    if (left) {
  /* Writing concatenation */
  		i__1[0] = 1, a__1[0] = side;
  		i__1[1] = 1, a__1[1] = trans;
  		s_cat(ch__1, a__1, i__1, &c__2, (ftnlen)2);
  		i__2 = *m - 1;
  		i__3 = *m - 1;
  		nb = ilaenv_(&c__1, "CUNMQL", ch__1, &i__2, n, &i__3, &c_n1);
  	    } else {
  /* Writing concatenation */
  		i__1[0] = 1, a__1[0] = side;
  		i__1[1] = 1, a__1[1] = trans;
  		s_cat(ch__1, a__1, i__1, &c__2, (ftnlen)2);
  		i__2 = *n - 1;
  		i__3 = *n - 1;
  		nb = ilaenv_(&c__1, "CUNMQL", ch__1, m, &i__2, &i__3, &c_n1);
  	    }
  	} else {
  	    if (left) {
  /* Writing concatenation */
  		i__1[0] = 1, a__1[0] = side;
  		i__1[1] = 1, a__1[1] = trans;
  		s_cat(ch__1, a__1, i__1, &c__2, (ftnlen)2);
  		i__2 = *m - 1;
  		i__3 = *m - 1;
  		nb = ilaenv_(&c__1, "CUNMQR", ch__1, &i__2, n, &i__3, &c_n1);
  	    } else {
  /* Writing concatenation */
  		i__1[0] = 1, a__1[0] = side;
  		i__1[1] = 1, a__1[1] = trans;
  		s_cat(ch__1, a__1, i__1, &c__2, (ftnlen)2);
  		i__2 = *n - 1;
  		i__3 = *n - 1;
  		nb = ilaenv_(&c__1, "CUNMQR", ch__1, m, &i__2, &i__3, &c_n1);
  	    }
  	}
  	lwkopt = max(1,nw) * nb;
  	work[1].r = (real) lwkopt, work[1].i = 0.f;
      }
  
      if (*info != 0) {
  	i__2 = -(*info);
  	xerbla_("CUNMTR", &i__2);
  	return 0;
      } else if (lquery) {
  	return 0;
      }
  
  /*     Quick return if possible */
  
      if (*m == 0 || *n == 0 || nq == 1) {
  	work[1].r = 1.f, work[1].i = 0.f;
  	return 0;
      }
  
      if (left) {
  	mi = *m - 1;
  	ni = *n;
      } else {
  	mi = *m;
  	ni = *n - 1;
      }
  
      if (upper) {
  
  /*        Q was determined by a call to CHETRD with UPLO = 'U' */
  
  	i__2 = nq - 1;
  	cunmql_(side, trans, &mi, &ni, &i__2, &a[(a_dim1 << 1) + 1], lda, &
  		tau[1], &c__[c_offset], ldc, &work[1], lwork, &iinfo);
      } else {
  
  /*        Q was determined by a call to CHETRD with UPLO = 'L' */
  
  	if (left) {
  	    i1 = 2;
  	    i2 = 1;
  	} else {
  	    i1 = 1;
  	    i2 = 2;
  	}
  	i__2 = nq - 1;
  	cunmqr_(side, trans, &mi, &ni, &i__2, &a[a_dim1 + 2], lda, &tau[1], &
  		c__[i1 + i2 * c_dim1], ldc, &work[1], lwork, &iinfo);
      }
      work[1].r = (real) lwkopt, work[1].i = 0.f;
      return 0;
  
  /*     End of CUNMTR */
  
  } /* cunmtr_ */
  