331 lines
14 KiB
C++
331 lines
14 KiB
C++
#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lmp_f2c.h"
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int ztrsv_(char *uplo, char *trans, char *diag, integer *n, doublecomplex *a, integer *lda,
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doublecomplex *x, integer *incx, ftnlen uplo_len, ftnlen trans_len, ftnlen diag_len)
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{
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integer a_dim1, a_offset, i__1, i__2, i__3, i__4, i__5;
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doublecomplex z__1, z__2, z__3;
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void z_lmp_div(doublecomplex *, doublecomplex *, doublecomplex *),
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d_lmp_cnjg(doublecomplex *, doublecomplex *);
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integer i__, j, ix, jx, kx, info;
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doublecomplex temp;
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extern logical lsame_(char *, char *, ftnlen, ftnlen);
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extern int xerbla_(char *, integer *, ftnlen);
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logical noconj, nounit;
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a_dim1 = *lda;
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a_offset = 1 + a_dim1;
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a -= a_offset;
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--x;
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info = 0;
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if (!lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1) && !lsame_(uplo, (char *)"L", (ftnlen)1, (ftnlen)1)) {
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info = 1;
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} else if (!lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1) &&
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!lsame_(trans, (char *)"T", (ftnlen)1, (ftnlen)1) &&
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!lsame_(trans, (char *)"C", (ftnlen)1, (ftnlen)1)) {
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info = 2;
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} else if (!lsame_(diag, (char *)"U", (ftnlen)1, (ftnlen)1) &&
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!lsame_(diag, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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info = 3;
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} else if (*n < 0) {
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info = 4;
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} else if (*lda < max(1, *n)) {
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info = 6;
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} else if (*incx == 0) {
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info = 8;
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}
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if (info != 0) {
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xerbla_((char *)"ZTRSV ", &info, (ftnlen)6);
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return 0;
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}
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if (*n == 0) {
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return 0;
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}
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noconj = lsame_(trans, (char *)"T", (ftnlen)1, (ftnlen)1);
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nounit = lsame_(diag, (char *)"N", (ftnlen)1, (ftnlen)1);
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if (*incx <= 0) {
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kx = 1 - (*n - 1) * *incx;
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} else if (*incx != 1) {
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kx = 1;
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}
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if (lsame_(trans, (char *)"N", (ftnlen)1, (ftnlen)1)) {
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if (lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1)) {
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if (*incx == 1) {
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for (j = *n; j >= 1; --j) {
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i__1 = j;
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if (x[i__1].r != 0. || x[i__1].i != 0.) {
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if (nounit) {
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i__1 = j;
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z_lmp_div(&z__1, &x[j], &a[j + j * a_dim1]);
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x[i__1].r = z__1.r, x[i__1].i = z__1.i;
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}
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i__1 = j;
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temp.r = x[i__1].r, temp.i = x[i__1].i;
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for (i__ = j - 1; i__ >= 1; --i__) {
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i__1 = i__;
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i__2 = i__;
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i__3 = i__ + j * a_dim1;
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z__2.r = temp.r * a[i__3].r - temp.i * a[i__3].i,
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z__2.i = temp.r * a[i__3].i + temp.i * a[i__3].r;
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z__1.r = x[i__2].r - z__2.r, z__1.i = x[i__2].i - z__2.i;
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x[i__1].r = z__1.r, x[i__1].i = z__1.i;
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}
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}
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}
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} else {
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jx = kx + (*n - 1) * *incx;
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for (j = *n; j >= 1; --j) {
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i__1 = jx;
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if (x[i__1].r != 0. || x[i__1].i != 0.) {
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if (nounit) {
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i__1 = jx;
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z_lmp_div(&z__1, &x[jx], &a[j + j * a_dim1]);
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x[i__1].r = z__1.r, x[i__1].i = z__1.i;
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}
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i__1 = jx;
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temp.r = x[i__1].r, temp.i = x[i__1].i;
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ix = jx;
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for (i__ = j - 1; i__ >= 1; --i__) {
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ix -= *incx;
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i__1 = ix;
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i__2 = ix;
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i__3 = i__ + j * a_dim1;
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z__2.r = temp.r * a[i__3].r - temp.i * a[i__3].i,
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z__2.i = temp.r * a[i__3].i + temp.i * a[i__3].r;
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z__1.r = x[i__2].r - z__2.r, z__1.i = x[i__2].i - z__2.i;
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x[i__1].r = z__1.r, x[i__1].i = z__1.i;
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}
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}
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jx -= *incx;
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}
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}
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} else {
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if (*incx == 1) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = j;
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if (x[i__2].r != 0. || x[i__2].i != 0.) {
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if (nounit) {
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i__2 = j;
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z_lmp_div(&z__1, &x[j], &a[j + j * a_dim1]);
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x[i__2].r = z__1.r, x[i__2].i = z__1.i;
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}
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i__2 = j;
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temp.r = x[i__2].r, temp.i = x[i__2].i;
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i__2 = *n;
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for (i__ = j + 1; i__ <= i__2; ++i__) {
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i__3 = i__;
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i__4 = i__;
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i__5 = i__ + j * a_dim1;
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z__2.r = temp.r * a[i__5].r - temp.i * a[i__5].i,
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z__2.i = temp.r * a[i__5].i + temp.i * a[i__5].r;
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z__1.r = x[i__4].r - z__2.r, z__1.i = x[i__4].i - z__2.i;
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x[i__3].r = z__1.r, x[i__3].i = z__1.i;
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}
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}
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}
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} else {
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jx = kx;
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = jx;
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if (x[i__2].r != 0. || x[i__2].i != 0.) {
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if (nounit) {
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i__2 = jx;
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z_lmp_div(&z__1, &x[jx], &a[j + j * a_dim1]);
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x[i__2].r = z__1.r, x[i__2].i = z__1.i;
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}
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i__2 = jx;
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temp.r = x[i__2].r, temp.i = x[i__2].i;
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ix = jx;
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i__2 = *n;
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for (i__ = j + 1; i__ <= i__2; ++i__) {
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ix += *incx;
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i__3 = ix;
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i__4 = ix;
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i__5 = i__ + j * a_dim1;
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z__2.r = temp.r * a[i__5].r - temp.i * a[i__5].i,
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z__2.i = temp.r * a[i__5].i + temp.i * a[i__5].r;
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z__1.r = x[i__4].r - z__2.r, z__1.i = x[i__4].i - z__2.i;
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x[i__3].r = z__1.r, x[i__3].i = z__1.i;
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}
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}
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jx += *incx;
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}
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}
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}
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} else {
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if (lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1)) {
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if (*incx == 1) {
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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i__2 = j;
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temp.r = x[i__2].r, temp.i = x[i__2].i;
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if (noconj) {
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i__2 = j - 1;
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for (i__ = 1; i__ <= i__2; ++i__) {
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i__3 = i__ + j * a_dim1;
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i__4 = i__;
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z__2.r = a[i__3].r * x[i__4].r - a[i__3].i * x[i__4].i,
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z__2.i = a[i__3].r * x[i__4].i + a[i__3].i * x[i__4].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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}
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if (nounit) {
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z_lmp_div(&z__1, &temp, &a[j + j * a_dim1]);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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} else {
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i__2 = j - 1;
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for (i__ = 1; i__ <= i__2; ++i__) {
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d_lmp_cnjg(&z__3, &a[i__ + j * a_dim1]);
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i__3 = i__;
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z__2.r = z__3.r * x[i__3].r - z__3.i * x[i__3].i,
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z__2.i = z__3.r * x[i__3].i + z__3.i * x[i__3].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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}
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if (nounit) {
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d_lmp_cnjg(&z__2, &a[j + j * a_dim1]);
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z_lmp_div(&z__1, &temp, &z__2);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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}
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i__2 = j;
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x[i__2].r = temp.r, x[i__2].i = temp.i;
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}
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} else {
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jx = kx;
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i__1 = *n;
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for (j = 1; j <= i__1; ++j) {
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ix = kx;
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i__2 = jx;
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temp.r = x[i__2].r, temp.i = x[i__2].i;
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if (noconj) {
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i__2 = j - 1;
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for (i__ = 1; i__ <= i__2; ++i__) {
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i__3 = i__ + j * a_dim1;
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i__4 = ix;
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z__2.r = a[i__3].r * x[i__4].r - a[i__3].i * x[i__4].i,
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z__2.i = a[i__3].r * x[i__4].i + a[i__3].i * x[i__4].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix += *incx;
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}
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if (nounit) {
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z_lmp_div(&z__1, &temp, &a[j + j * a_dim1]);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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} else {
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i__2 = j - 1;
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for (i__ = 1; i__ <= i__2; ++i__) {
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d_lmp_cnjg(&z__3, &a[i__ + j * a_dim1]);
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i__3 = ix;
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z__2.r = z__3.r * x[i__3].r - z__3.i * x[i__3].i,
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z__2.i = z__3.r * x[i__3].i + z__3.i * x[i__3].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix += *incx;
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}
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if (nounit) {
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d_lmp_cnjg(&z__2, &a[j + j * a_dim1]);
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z_lmp_div(&z__1, &temp, &z__2);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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}
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i__2 = jx;
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x[i__2].r = temp.r, x[i__2].i = temp.i;
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jx += *incx;
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}
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}
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} else {
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if (*incx == 1) {
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for (j = *n; j >= 1; --j) {
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i__1 = j;
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temp.r = x[i__1].r, temp.i = x[i__1].i;
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if (noconj) {
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i__1 = j + 1;
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for (i__ = *n; i__ >= i__1; --i__) {
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i__2 = i__ + j * a_dim1;
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i__3 = i__;
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z__2.r = a[i__2].r * x[i__3].r - a[i__2].i * x[i__3].i,
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z__2.i = a[i__2].r * x[i__3].i + a[i__2].i * x[i__3].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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}
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if (nounit) {
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z_lmp_div(&z__1, &temp, &a[j + j * a_dim1]);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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} else {
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i__1 = j + 1;
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for (i__ = *n; i__ >= i__1; --i__) {
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d_lmp_cnjg(&z__3, &a[i__ + j * a_dim1]);
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i__2 = i__;
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z__2.r = z__3.r * x[i__2].r - z__3.i * x[i__2].i,
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z__2.i = z__3.r * x[i__2].i + z__3.i * x[i__2].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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}
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if (nounit) {
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d_lmp_cnjg(&z__2, &a[j + j * a_dim1]);
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z_lmp_div(&z__1, &temp, &z__2);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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}
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i__1 = j;
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x[i__1].r = temp.r, x[i__1].i = temp.i;
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}
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} else {
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kx += (*n - 1) * *incx;
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jx = kx;
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for (j = *n; j >= 1; --j) {
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ix = kx;
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i__1 = jx;
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temp.r = x[i__1].r, temp.i = x[i__1].i;
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if (noconj) {
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i__1 = j + 1;
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for (i__ = *n; i__ >= i__1; --i__) {
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i__2 = i__ + j * a_dim1;
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i__3 = ix;
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z__2.r = a[i__2].r * x[i__3].r - a[i__2].i * x[i__3].i,
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z__2.i = a[i__2].r * x[i__3].i + a[i__2].i * x[i__3].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix -= *incx;
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}
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if (nounit) {
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z_lmp_div(&z__1, &temp, &a[j + j * a_dim1]);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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} else {
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i__1 = j + 1;
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for (i__ = *n; i__ >= i__1; --i__) {
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d_lmp_cnjg(&z__3, &a[i__ + j * a_dim1]);
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i__2 = ix;
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z__2.r = z__3.r * x[i__2].r - z__3.i * x[i__2].i,
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z__2.i = z__3.r * x[i__2].i + z__3.i * x[i__2].r;
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z__1.r = temp.r - z__2.r, z__1.i = temp.i - z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix -= *incx;
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}
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if (nounit) {
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d_lmp_cnjg(&z__2, &a[j + j * a_dim1]);
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z_lmp_div(&z__1, &temp, &z__2);
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temp.r = z__1.r, temp.i = z__1.i;
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}
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}
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i__1 = jx;
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x[i__1].r = temp.r, x[i__1].i = temp.i;
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jx -= *incx;
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}
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}
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}
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}
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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