188 lines
9.7 KiB
C++
188 lines
9.7 KiB
C++
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
#include "lmp_f2c.h"
|
|
static integer c__1 = 1;
|
|
static integer c_n1 = -1;
|
|
static doublereal c_b14 = 1.;
|
|
static doublereal c_b16 = -.5;
|
|
static doublereal c_b19 = -1.;
|
|
static doublereal c_b52 = .5;
|
|
int dsygst_(integer *itype, char *uplo, integer *n, doublereal *a, integer *lda, doublereal *b,
|
|
integer *ldb, integer *info, ftnlen uplo_len)
|
|
{
|
|
integer a_dim1, a_offset, b_dim1, b_offset, i__1, i__2, i__3;
|
|
integer k, kb, nb;
|
|
extern logical lsame_(char *, char *, ftnlen, ftnlen);
|
|
extern int dtrmm_(char *, char *, char *, char *, integer *, integer *, doublereal *,
|
|
doublereal *, integer *, doublereal *, integer *, ftnlen, ftnlen, ftnlen,
|
|
ftnlen),
|
|
dsymm_(char *, char *, integer *, integer *, doublereal *, doublereal *, integer *,
|
|
doublereal *, integer *, doublereal *, doublereal *, integer *, ftnlen, ftnlen);
|
|
logical upper;
|
|
extern int dtrsm_(char *, char *, char *, char *, integer *, integer *, doublereal *,
|
|
doublereal *, integer *, doublereal *, integer *, ftnlen, ftnlen, ftnlen,
|
|
ftnlen),
|
|
dsygs2_(integer *, char *, integer *, doublereal *, integer *, doublereal *, integer *,
|
|
integer *, ftnlen),
|
|
dsyr2k_(char *, char *, integer *, integer *, doublereal *, doublereal *, integer *,
|
|
doublereal *, integer *, doublereal *, doublereal *, integer *, ftnlen, ftnlen),
|
|
xerbla_(char *, integer *, ftnlen);
|
|
extern integer ilaenv_(integer *, char *, char *, integer *, integer *, integer *, integer *,
|
|
ftnlen, ftnlen);
|
|
a_dim1 = *lda;
|
|
a_offset = 1 + a_dim1;
|
|
a -= a_offset;
|
|
b_dim1 = *ldb;
|
|
b_offset = 1 + b_dim1;
|
|
b -= b_offset;
|
|
*info = 0;
|
|
upper = lsame_(uplo, (char *)"U", (ftnlen)1, (ftnlen)1);
|
|
if (*itype < 1 || *itype > 3) {
|
|
*info = -1;
|
|
} else if (!upper && !lsame_(uplo, (char *)"L", (ftnlen)1, (ftnlen)1)) {
|
|
*info = -2;
|
|
} else if (*n < 0) {
|
|
*info = -3;
|
|
} else if (*lda < max(1, *n)) {
|
|
*info = -5;
|
|
} else if (*ldb < max(1, *n)) {
|
|
*info = -7;
|
|
}
|
|
if (*info != 0) {
|
|
i__1 = -(*info);
|
|
xerbla_((char *)"DSYGST", &i__1, (ftnlen)6);
|
|
return 0;
|
|
}
|
|
if (*n == 0) {
|
|
return 0;
|
|
}
|
|
nb = ilaenv_(&c__1, (char *)"DSYGST", uplo, n, &c_n1, &c_n1, &c_n1, (ftnlen)6, (ftnlen)1);
|
|
if (nb <= 1 || nb >= *n) {
|
|
dsygs2_(itype, uplo, n, &a[a_offset], lda, &b[b_offset], ldb, info, (ftnlen)1);
|
|
} else {
|
|
if (*itype == 1) {
|
|
if (upper) {
|
|
i__1 = *n;
|
|
i__2 = nb;
|
|
for (k = 1; i__2 < 0 ? k >= i__1 : k <= i__1; k += i__2) {
|
|
i__3 = *n - k + 1;
|
|
kb = min(i__3, nb);
|
|
dsygs2_(itype, uplo, &kb, &a[k + k * a_dim1], lda, &b[k + k * b_dim1], ldb,
|
|
info, (ftnlen)1);
|
|
if (k + kb <= *n) {
|
|
i__3 = *n - k - kb + 1;
|
|
dtrsm_((char *)"L", uplo, (char *)"T", (char *)"N", &kb, &i__3, &c_b14, &b[k + k * b_dim1], ldb,
|
|
&a[k + (k + kb) * a_dim1], lda, (ftnlen)1, (ftnlen)1, (ftnlen)1,
|
|
(ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dsymm_((char *)"L", uplo, &kb, &i__3, &c_b16, &a[k + k * a_dim1], lda,
|
|
&b[k + (k + kb) * b_dim1], ldb, &c_b14, &a[k + (k + kb) * a_dim1],
|
|
lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dsyr2k_(uplo, (char *)"T", &i__3, &kb, &c_b19, &a[k + (k + kb) * a_dim1], lda,
|
|
&b[k + (k + kb) * b_dim1], ldb, &c_b14,
|
|
&a[k + kb + (k + kb) * a_dim1], lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dsymm_((char *)"L", uplo, &kb, &i__3, &c_b16, &a[k + k * a_dim1], lda,
|
|
&b[k + (k + kb) * b_dim1], ldb, &c_b14, &a[k + (k + kb) * a_dim1],
|
|
lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dtrsm_((char *)"R", uplo, (char *)"N", (char *)"N", &kb, &i__3, &c_b14,
|
|
&b[k + kb + (k + kb) * b_dim1], ldb, &a[k + (k + kb) * a_dim1], lda,
|
|
(ftnlen)1, (ftnlen)1, (ftnlen)1, (ftnlen)1);
|
|
}
|
|
}
|
|
} else {
|
|
i__2 = *n;
|
|
i__1 = nb;
|
|
for (k = 1; i__1 < 0 ? k >= i__2 : k <= i__2; k += i__1) {
|
|
i__3 = *n - k + 1;
|
|
kb = min(i__3, nb);
|
|
dsygs2_(itype, uplo, &kb, &a[k + k * a_dim1], lda, &b[k + k * b_dim1], ldb,
|
|
info, (ftnlen)1);
|
|
if (k + kb <= *n) {
|
|
i__3 = *n - k - kb + 1;
|
|
dtrsm_((char *)"R", uplo, (char *)"T", (char *)"N", &i__3, &kb, &c_b14, &b[k + k * b_dim1], ldb,
|
|
&a[k + kb + k * a_dim1], lda, (ftnlen)1, (ftnlen)1, (ftnlen)1,
|
|
(ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dsymm_((char *)"R", uplo, &i__3, &kb, &c_b16, &a[k + k * a_dim1], lda,
|
|
&b[k + kb + k * b_dim1], ldb, &c_b14, &a[k + kb + k * a_dim1], lda,
|
|
(ftnlen)1, (ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dsyr2k_(uplo, (char *)"N", &i__3, &kb, &c_b19, &a[k + kb + k * a_dim1], lda,
|
|
&b[k + kb + k * b_dim1], ldb, &c_b14,
|
|
&a[k + kb + (k + kb) * a_dim1], lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dsymm_((char *)"R", uplo, &i__3, &kb, &c_b16, &a[k + k * a_dim1], lda,
|
|
&b[k + kb + k * b_dim1], ldb, &c_b14, &a[k + kb + k * a_dim1], lda,
|
|
(ftnlen)1, (ftnlen)1);
|
|
i__3 = *n - k - kb + 1;
|
|
dtrsm_((char *)"L", uplo, (char *)"N", (char *)"N", &i__3, &kb, &c_b14,
|
|
&b[k + kb + (k + kb) * b_dim1], ldb, &a[k + kb + k * a_dim1], lda,
|
|
(ftnlen)1, (ftnlen)1, (ftnlen)1, (ftnlen)1);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
if (upper) {
|
|
i__1 = *n;
|
|
i__2 = nb;
|
|
for (k = 1; i__2 < 0 ? k >= i__1 : k <= i__1; k += i__2) {
|
|
i__3 = *n - k + 1;
|
|
kb = min(i__3, nb);
|
|
i__3 = k - 1;
|
|
dtrmm_((char *)"L", uplo, (char *)"N", (char *)"N", &i__3, &kb, &c_b14, &b[b_offset], ldb,
|
|
&a[k * a_dim1 + 1], lda, (ftnlen)1, (ftnlen)1, (ftnlen)1, (ftnlen)1);
|
|
i__3 = k - 1;
|
|
dsymm_((char *)"R", uplo, &i__3, &kb, &c_b52, &a[k + k * a_dim1], lda,
|
|
&b[k * b_dim1 + 1], ldb, &c_b14, &a[k * a_dim1 + 1], lda, (ftnlen)1,
|
|
(ftnlen)1);
|
|
i__3 = k - 1;
|
|
dsyr2k_(uplo, (char *)"N", &i__3, &kb, &c_b14, &a[k * a_dim1 + 1], lda,
|
|
&b[k * b_dim1 + 1], ldb, &c_b14, &a[a_offset], lda, (ftnlen)1,
|
|
(ftnlen)1);
|
|
i__3 = k - 1;
|
|
dsymm_((char *)"R", uplo, &i__3, &kb, &c_b52, &a[k + k * a_dim1], lda,
|
|
&b[k * b_dim1 + 1], ldb, &c_b14, &a[k * a_dim1 + 1], lda, (ftnlen)1,
|
|
(ftnlen)1);
|
|
i__3 = k - 1;
|
|
dtrmm_((char *)"R", uplo, (char *)"T", (char *)"N", &i__3, &kb, &c_b14, &b[k + k * b_dim1], ldb,
|
|
&a[k * a_dim1 + 1], lda, (ftnlen)1, (ftnlen)1, (ftnlen)1, (ftnlen)1);
|
|
dsygs2_(itype, uplo, &kb, &a[k + k * a_dim1], lda, &b[k + k * b_dim1], ldb,
|
|
info, (ftnlen)1);
|
|
}
|
|
} else {
|
|
i__2 = *n;
|
|
i__1 = nb;
|
|
for (k = 1; i__1 < 0 ? k >= i__2 : k <= i__2; k += i__1) {
|
|
i__3 = *n - k + 1;
|
|
kb = min(i__3, nb);
|
|
i__3 = k - 1;
|
|
dtrmm_((char *)"R", uplo, (char *)"N", (char *)"N", &kb, &i__3, &c_b14, &b[b_offset], ldb,
|
|
&a[k + a_dim1], lda, (ftnlen)1, (ftnlen)1, (ftnlen)1, (ftnlen)1);
|
|
i__3 = k - 1;
|
|
dsymm_((char *)"L", uplo, &kb, &i__3, &c_b52, &a[k + k * a_dim1], lda, &b[k + b_dim1],
|
|
ldb, &c_b14, &a[k + a_dim1], lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = k - 1;
|
|
dsyr2k_(uplo, (char *)"T", &i__3, &kb, &c_b14, &a[k + a_dim1], lda, &b[k + b_dim1], ldb,
|
|
&c_b14, &a[a_offset], lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = k - 1;
|
|
dsymm_((char *)"L", uplo, &kb, &i__3, &c_b52, &a[k + k * a_dim1], lda, &b[k + b_dim1],
|
|
ldb, &c_b14, &a[k + a_dim1], lda, (ftnlen)1, (ftnlen)1);
|
|
i__3 = k - 1;
|
|
dtrmm_((char *)"L", uplo, (char *)"T", (char *)"N", &kb, &i__3, &c_b14, &b[k + k * b_dim1], ldb,
|
|
&a[k + a_dim1], lda, (ftnlen)1, (ftnlen)1, (ftnlen)1, (ftnlen)1);
|
|
dsygs2_(itype, uplo, &kb, &a[k + k * a_dim1], lda, &b[k + k * b_dim1], ldb,
|
|
info, (ftnlen)1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|