193 lines
7.2 KiB
C++
193 lines
7.2 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 zhpr_(char *uplo, integer *n, doublereal *alpha, doublecomplex *x, integer *incx,
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doublecomplex *ap, ftnlen uplo_len)
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{
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integer i__1, i__2, i__3, i__4, i__5;
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doublereal d__1;
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doublecomplex z__1, z__2;
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void d_lmp_cnjg(doublecomplex *, doublecomplex *);
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integer i__, j, k, kk, 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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--ap;
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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 (*n < 0) {
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info = 2;
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} else if (*incx == 0) {
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info = 5;
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}
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if (info != 0) {
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xerbla_((char *)"ZHPR ", &info, (ftnlen)6);
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return 0;
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}
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if (*n == 0 || *alpha == 0.) {
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return 0;
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}
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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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kk = 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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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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d_lmp_cnjg(&z__2, &x[j]);
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z__1.r = *alpha * z__2.r, z__1.i = *alpha * z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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k = kk;
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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 = k;
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i__4 = k;
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i__5 = i__;
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z__2.r = x[i__5].r * temp.r - x[i__5].i * temp.i,
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z__2.i = x[i__5].r * temp.i + x[i__5].i * temp.r;
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z__1.r = ap[i__4].r + z__2.r, z__1.i = ap[i__4].i + z__2.i;
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ap[i__3].r = z__1.r, ap[i__3].i = z__1.i;
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++k;
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}
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i__2 = kk + j - 1;
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i__3 = kk + j - 1;
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i__4 = j;
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z__1.r = x[i__4].r * temp.r - x[i__4].i * temp.i,
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z__1.i = x[i__4].r * temp.i + x[i__4].i * temp.r;
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d__1 = ap[i__3].r + z__1.r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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} else {
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i__2 = kk + j - 1;
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i__3 = kk + j - 1;
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d__1 = ap[i__3].r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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}
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kk += j;
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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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d_lmp_cnjg(&z__2, &x[jx]);
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z__1.r = *alpha * z__2.r, z__1.i = *alpha * z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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ix = kx;
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i__2 = kk + j - 2;
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for (k = kk; k <= i__2; ++k) {
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i__3 = k;
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i__4 = k;
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i__5 = ix;
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z__2.r = x[i__5].r * temp.r - x[i__5].i * temp.i,
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z__2.i = x[i__5].r * temp.i + x[i__5].i * temp.r;
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z__1.r = ap[i__4].r + z__2.r, z__1.i = ap[i__4].i + z__2.i;
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ap[i__3].r = z__1.r, ap[i__3].i = z__1.i;
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ix += *incx;
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}
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i__2 = kk + j - 1;
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i__3 = kk + j - 1;
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i__4 = jx;
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z__1.r = x[i__4].r * temp.r - x[i__4].i * temp.i,
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z__1.i = x[i__4].r * temp.i + x[i__4].i * temp.r;
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d__1 = ap[i__3].r + z__1.r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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} else {
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i__2 = kk + j - 1;
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i__3 = kk + j - 1;
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d__1 = ap[i__3].r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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}
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jx += *incx;
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kk += j;
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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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d_lmp_cnjg(&z__2, &x[j]);
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z__1.r = *alpha * z__2.r, z__1.i = *alpha * z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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i__2 = kk;
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i__3 = kk;
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i__4 = j;
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z__1.r = temp.r * x[i__4].r - temp.i * x[i__4].i,
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z__1.i = temp.r * x[i__4].i + temp.i * x[i__4].r;
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d__1 = ap[i__3].r + z__1.r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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k = kk + 1;
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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 = k;
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i__4 = k;
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i__5 = i__;
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z__2.r = x[i__5].r * temp.r - x[i__5].i * temp.i,
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z__2.i = x[i__5].r * temp.i + x[i__5].i * temp.r;
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z__1.r = ap[i__4].r + z__2.r, z__1.i = ap[i__4].i + z__2.i;
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ap[i__3].r = z__1.r, ap[i__3].i = z__1.i;
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++k;
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}
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} else {
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i__2 = kk;
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i__3 = kk;
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d__1 = ap[i__3].r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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}
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kk = kk + *n - j + 1;
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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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d_lmp_cnjg(&z__2, &x[jx]);
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z__1.r = *alpha * z__2.r, z__1.i = *alpha * z__2.i;
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temp.r = z__1.r, temp.i = z__1.i;
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i__2 = kk;
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i__3 = kk;
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i__4 = jx;
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z__1.r = temp.r * x[i__4].r - temp.i * x[i__4].i,
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z__1.i = temp.r * x[i__4].i + temp.i * x[i__4].r;
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d__1 = ap[i__3].r + z__1.r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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ix = jx;
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i__2 = kk + *n - j;
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for (k = kk + 1; k <= i__2; ++k) {
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ix += *incx;
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i__3 = k;
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i__4 = k;
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i__5 = ix;
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z__2.r = x[i__5].r * temp.r - x[i__5].i * temp.i,
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z__2.i = x[i__5].r * temp.i + x[i__5].i * temp.r;
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z__1.r = ap[i__4].r + z__2.r, z__1.i = ap[i__4].i + z__2.i;
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ap[i__3].r = z__1.r, ap[i__3].i = z__1.i;
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}
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} else {
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i__2 = kk;
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i__3 = kk;
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d__1 = ap[i__3].r;
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ap[i__2].r = d__1, ap[i__2].i = 0.;
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}
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jx += *incx;
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kk = kk + *n - j + 1;
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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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