📄 zlarfb.c
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}
/* W := W * T or W * T' */
/*< >*/
ztrmm_("Right", "Upper", trans, "Non-unit", m, k, &c_b1, &t[
t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
(ftnlen)5, (ftnlen)1, (ftnlen)8);
/* C := C - W * V' */
/*< IF( N.GT.K ) THEN >*/
if (*n > *k) {
/* C2 := C2 - W * V2' */
/*< >*/
i__1 = *n - *k;
z__1.r = -1., z__1.i = -0.;
zgemm_("No transpose", "Conjugate transpose", m, &i__1, k,
&z__1, &work[work_offset], ldwork, &v[*k + 1 +
v_dim1], ldv, &c_b1, &c__[(*k + 1) * c_dim1 + 1],
ldc, (ftnlen)12, (ftnlen)19);
/*< END IF >*/
}
/* W := W * V1' */
/*< >*/
ztrmm_("Right", "Lower", "Conjugate transpose", "Unit", m, k,
&c_b1, &v[v_offset], ldv, &work[work_offset], ldwork,
(ftnlen)5, (ftnlen)5, (ftnlen)19, (ftnlen)4);
/* C1 := C1 - W */
/*< DO 60 J = 1, K >*/
i__1 = *k;
for (j = 1; j <= i__1; ++j) {
/*< DO 50 I = 1, M >*/
i__2 = *m;
for (i__ = 1; i__ <= i__2; ++i__) {
/*< C( I, J ) = C( I, J ) - WORK( I, J ) >*/
i__3 = i__ + j * c_dim1;
i__4 = i__ + j * c_dim1;
i__5 = i__ + j * work_dim1;
z__1.r = c__[i__4].r - work[i__5].r, z__1.i = c__[
i__4].i - work[i__5].i;
c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/*< 50 CONTINUE >*/
/* L50: */
}
/*< 60 CONTINUE >*/
/* L60: */
}
/*< END IF >*/
}
/*< ELSE >*/
} else {
/* Let V = ( V1 ) */
/* ( V2 ) (last K rows) */
/* where V2 is unit upper triangular. */
/*< IF( LSAME( SIDE, 'L' ) ) THEN >*/
if (lsame_(side, "L", (ftnlen)1, (ftnlen)1)) {
/* Form H * C or H' * C where C = ( C1 ) */
/* ( C2 ) */
/* W := C' * V = (C1'*V1 + C2'*V2) (stored in WORK) */
/* W := C2' */
/*< DO 70 J = 1, K >*/
i__1 = *k;
for (j = 1; j <= i__1; ++j) {
/*< CALL ZCOPY( N, C( M-K+J, 1 ), LDC, WORK( 1, J ), 1 ) >*/
zcopy_(n, &c__[*m - *k + j + c_dim1], ldc, &work[j *
work_dim1 + 1], &c__1);
/*< CALL ZLACGV( N, WORK( 1, J ), 1 ) >*/
zlacgv_(n, &work[j * work_dim1 + 1], &c__1);
/*< 70 CONTINUE >*/
/* L70: */
}
/* W := W * V2 */
/*< >*/
ztrmm_("Right", "Upper", "No transpose", "Unit", n, k, &c_b1,
&v[*m - *k + 1 + v_dim1], ldv, &work[work_offset],
ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);
/*< IF( M.GT.K ) THEN >*/
if (*m > *k) {
/* W := W + C1'*V1 */
/*< >*/
i__1 = *m - *k;
zgemm_("Conjugate transpose", "No transpose", n, k, &i__1,
&c_b1, &c__[c_offset], ldc, &v[v_offset], ldv, &
c_b1, &work[work_offset], ldwork, (ftnlen)19, (
ftnlen)12);
/*< END IF >*/
}
/* W := W * T' or W * T */
/*< >*/
ztrmm_("Right", "Lower", transt, "Non-unit", n, k, &c_b1, &t[
t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
(ftnlen)5, (ftnlen)1, (ftnlen)8);
/* C := C - V * W' */
/*< IF( M.GT.K ) THEN >*/
if (*m > *k) {
/* C1 := C1 - V1 * W' */
/*< >*/
i__1 = *m - *k;
z__1.r = -1., z__1.i = -0.;
zgemm_("No transpose", "Conjugate transpose", &i__1, n, k,
&z__1, &v[v_offset], ldv, &work[work_offset],
ldwork, &c_b1, &c__[c_offset], ldc, (ftnlen)12, (
ftnlen)19);
/*< END IF >*/
}
/* W := W * V2' */
/*< >*/
ztrmm_("Right", "Upper", "Conjugate transpose", "Unit", n, k,
&c_b1, &v[*m - *k + 1 + v_dim1], ldv, &work[
work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
19, (ftnlen)4);
/* C2 := C2 - W' */
/*< DO 90 J = 1, K >*/
i__1 = *k;
for (j = 1; j <= i__1; ++j) {
/*< DO 80 I = 1, N >*/
i__2 = *n;
for (i__ = 1; i__ <= i__2; ++i__) {
/*< >*/
i__3 = *m - *k + j + i__ * c_dim1;
i__4 = *m - *k + j + i__ * c_dim1;
d_cnjg(&z__2, &work[i__ + j * work_dim1]);
z__1.r = c__[i__4].r - z__2.r, z__1.i = c__[i__4].i -
z__2.i;
c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/*< 80 CONTINUE >*/
/* L80: */
}
/*< 90 CONTINUE >*/
/* L90: */
}
/*< ELSE IF( LSAME( SIDE, 'R' ) ) THEN >*/
} else if (lsame_(side, "R", (ftnlen)1, (ftnlen)1)) {
/* Form C * H or C * H' where C = ( C1 C2 ) */
/* W := C * V = (C1*V1 + C2*V2) (stored in WORK) */
/* W := C2 */
/*< DO 100 J = 1, K >*/
i__1 = *k;
for (j = 1; j <= i__1; ++j) {
/*< CALL ZCOPY( M, C( 1, N-K+J ), 1, WORK( 1, J ), 1 ) >*/
zcopy_(m, &c__[(*n - *k + j) * c_dim1 + 1], &c__1, &work[
j * work_dim1 + 1], &c__1);
/*< 100 CONTINUE >*/
/* L100: */
}
/* W := W * V2 */
/*< >*/
ztrmm_("Right", "Upper", "No transpose", "Unit", m, k, &c_b1,
&v[*n - *k + 1 + v_dim1], ldv, &work[work_offset],
ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)12, (ftnlen)4);
/*< IF( N.GT.K ) THEN >*/
if (*n > *k) {
/* W := W + C1 * V1 */
/*< >*/
i__1 = *n - *k;
zgemm_("No transpose", "No transpose", m, k, &i__1, &c_b1,
&c__[c_offset], ldc, &v[v_offset], ldv, &c_b1, &
work[work_offset], ldwork, (ftnlen)12, (ftnlen)12)
;
/*< END IF >*/
}
/* W := W * T or W * T' */
/*< >*/
ztrmm_("Right", "Lower", trans, "Non-unit", m, k, &c_b1, &t[
t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
(ftnlen)5, (ftnlen)1, (ftnlen)8);
/* C := C - W * V' */
/*< IF( N.GT.K ) THEN >*/
if (*n > *k) {
/* C1 := C1 - W * V1' */
/*< >*/
i__1 = *n - *k;
z__1.r = -1., z__1.i = -0.;
zgemm_("No transpose", "Conjugate transpose", m, &i__1, k,
&z__1, &work[work_offset], ldwork, &v[v_offset],
ldv, &c_b1, &c__[c_offset], ldc, (ftnlen)12, (
ftnlen)19);
/*< END IF >*/
}
/* W := W * V2' */
/*< >*/
ztrmm_("Right", "Upper", "Conjugate transpose", "Unit", m, k,
&c_b1, &v[*n - *k + 1 + v_dim1], ldv, &work[
work_offset], ldwork, (ftnlen)5, (ftnlen)5, (ftnlen)
19, (ftnlen)4);
/* C2 := C2 - W */
/*< DO 120 J = 1, K >*/
i__1 = *k;
for (j = 1; j <= i__1; ++j) {
/*< DO 110 I = 1, M >*/
i__2 = *m;
for (i__ = 1; i__ <= i__2; ++i__) {
/*< C( I, N-K+J ) = C( I, N-K+J ) - WORK( I, J ) >*/
i__3 = i__ + (*n - *k + j) * c_dim1;
i__4 = i__ + (*n - *k + j) * c_dim1;
i__5 = i__ + j * work_dim1;
z__1.r = c__[i__4].r - work[i__5].r, z__1.i = c__[
i__4].i - work[i__5].i;
c__[i__3].r = z__1.r, c__[i__3].i = z__1.i;
/*< 110 CONTINUE >*/
/* L110: */
}
/*< 120 CONTINUE >*/
/* L120: */
}
/*< END IF >*/
}
/*< END IF >*/
}
/*< ELSE IF( LSAME( STOREV, 'R' ) ) THEN >*/
} else if (lsame_(storev, "R", (ftnlen)1, (ftnlen)1)) {
/*< IF( LSAME( DIRECT, 'F' ) ) THEN >*/
if (lsame_(direct, "F", (ftnlen)1, (ftnlen)1)) {
/* Let V = ( V1 V2 ) (V1: first K columns) */
/* where V1 is unit upper triangular. */
/*< IF( LSAME( SIDE, 'L' ) ) THEN >*/
if (lsame_(side, "L", (ftnlen)1, (ftnlen)1)) {
/* Form H * C or H' * C where C = ( C1 ) */
/* ( C2 ) */
/* W := C' * V' = (C1'*V1' + C2'*V2') (stored in WORK) */
/* W := C1' */
/*< DO 130 J = 1, K >*/
i__1 = *k;
for (j = 1; j <= i__1; ++j) {
/*< CALL ZCOPY( N, C( J, 1 ), LDC, WORK( 1, J ), 1 ) >*/
zcopy_(n, &c__[j + c_dim1], ldc, &work[j * work_dim1 + 1],
&c__1);
/*< CALL ZLACGV( N, WORK( 1, J ), 1 ) >*/
zlacgv_(n, &work[j * work_dim1 + 1], &c__1);
/*< 130 CONTINUE >*/
/* L130: */
}
/* W := W * V1' */
/*< >*/
ztrmm_("Right", "Upper", "Conjugate transpose", "Unit", n, k,
&c_b1, &v[v_offset], ldv, &work[work_offset], ldwork,
(ftnlen)5, (ftnlen)5, (ftnlen)19, (ftnlen)4);
/*< IF( M.GT.K ) THEN >*/
if (*m > *k) {
/* W := W + C2'*V2' */
/*< >*/
i__1 = *m - *k;
zgemm_("Conjugate transpose", "Conjugate transpose", n, k,
&i__1, &c_b1, &c__[*k + 1 + c_dim1], ldc, &v[(*k
+ 1) * v_dim1 + 1], ldv, &c_b1, &work[work_offset]
, ldwork, (ftnlen)19, (ftnlen)19);
/*< END IF >*/
}
/* W := W * T' or W * T */
/*< >*/
ztrmm_("Right", "Upper", transt, "Non-unit", n, k, &c_b1, &t[
t_offset], ldt, &work[work_offset], ldwork, (ftnlen)5,
(ftnlen)5, (ftnlen)1, (ftnlen)8);
/* C := C - V' * W' */
/*< IF( M.GT.K ) THEN >*/
if (*m > *k) {
/* C2 := C2 - V2' * W' */
/*< >*/
i__1 = *m - *k;
z__1.r = -1., z__1.i = -0.;
zgemm_("Conjugate transpose", "Conjugate transpose", &
i__1, n, k, &z__1, &v[(*k + 1) * v_dim1 + 1], ldv,
&work[work_offset], ldwork, &c_b1, &c__[*k + 1 +
c_dim1], ldc, (ftnlen)19, (ftnlen)19);
/*< END IF >*/
}
/* W := W * V1 */
/*< >*/
ztrmm_("Right", "Upper", "No transpose", "Unit", n, k, &c_b1,
&v[v_offset], ldv, &work[work_offset], ldwork, (
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