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Functions | |
int | cunml2_fla (char *side, char *trans, integer *m, integer *n, integer *k, complex *a, integer *lda, complex *tau, complex *c__, integer *ldc, complex *work, integer *info) |
int cunml2_fla | ( | char * | side, |
char * | trans, | ||
integer * | m, | ||
integer * | n, | ||
integer * | k, | ||
complex * | a, | ||
integer * | lda, | ||
complex * | tau, | ||
complex * | c__, | ||
integer * | ldc, | ||
complex * | work, | ||
integer * | info | ||
) |
References complex::i, and complex::r.
Referenced by cunmlq_fla().
{ /* System generated locals */ integer a_dim1, a_offset, c_dim1, c_offset, i__1, i__2, i__3; complex q__1; /* Builtin functions */ void r_cnjg(complex *, complex *); /* Local variables */ integer i__, i1, i2, i3, ic, jc, mi, ni, nq; complex aii; logical left; complex taui; extern /* Subroutine */ int clarf_(char *, integer *, integer *, complex * , integer *, complex *, complex *, integer *, complex *); extern logical lsame_(char *, char *); extern /* Subroutine */ int clacgv_(integer *, complex *, integer *), xerbla_(char *, integer *); logical notran; /* -- LAPACK computational routine (version 3.4.2) -- */ /* -- LAPACK is a software package provided by Univ. of Tennessee, -- */ /* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..-- */ /* September 2012 */ /* .. Scalar Arguments .. */ /* .. */ /* .. Array Arguments .. */ /* .. */ /* ===================================================================== */ /* .. 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, "C")) { *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,*k)) { *info = -7; } else if (*ldc < max(1,*m)) { *info = -10; } if (*info != 0) { i__1 = -(*info); xerbla_("CUNML2", &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) or H(i)**H is applied to C(i:m,1:n) */ mi = *m - i__ + 1; ic = i__; } else { /* H(i) or H(i)**H is applied to C(1:m,i:n) */ ni = *n - i__ + 1; jc = i__; } /* Apply H(i) or H(i)**H */ if (notran) { r_cnjg(&q__1, &tau[i__]); taui.r = q__1.r; taui.i = q__1.i; // , expr subst } else { i__3 = i__; taui.r = tau[i__3].r; taui.i = tau[i__3].i; // , expr subst } if (i__ < nq) { i__3 = nq - i__; clacgv_(&i__3, &a[i__ + (i__ + 1) * a_dim1], lda); } i__3 = i__ + i__ * a_dim1; aii.r = a[i__3].r; aii.i = a[i__3].i; // , expr subst i__3 = i__ + i__ * a_dim1; a[i__3].r = 1.f; a[i__3].i = 0.f; // , expr subst clarf_(side, &mi, &ni, &a[i__ + i__ * a_dim1], lda, &taui, &c__[ic + jc * c_dim1], ldc, &work[1]); i__3 = i__ + i__ * a_dim1; a[i__3].r = aii.r; a[i__3].i = aii.i; // , expr subst if (i__ < nq) { i__3 = nq - i__; clacgv_(&i__3, &a[i__ + (i__ + 1) * a_dim1], lda); } /* L10: */ } return 0; /* End of CUNML2 */ }