#include "f2c.h" #include "blaswrap.h" /* Subroutine */ int claipd_(integer *n, complex *a, integer *inda, integer * vinda) { /* System generated locals */ integer i__1, i__2, i__3; real r__1; complex q__1; /* Local variables */ integer i__, ia, ixa; extern doublereal slamch_(char *); real bignum; /* -- LAPACK test routine (version 3.1) -- */ /* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ /* November 2006 */ /* .. Scalar Arguments .. */ /* .. */ /* .. Array Arguments .. */ /* .. */ /* Purpose */ /* ======= */ /* CLAIPD sets the imaginary part of the diagonal elements of a complex */ /* matrix A to a large value. This is used to test LAPACK routines for */ /* complex Hermitian matrices, which are not supposed to access or use */ /* the imaginary parts of the diagonals. */ /* Arguments */ /* ========= */ /* N (input) INTEGER */ /* The number of diagonal elements of A. */ /* A (input/output) COMPLEX array, dimension */ /* (1+(N-1)*INDA+(N-2)*VINDA) */ /* On entry, the complex (Hermitian) matrix A. */ /* On exit, the imaginary parts of the diagonal elements are set */ /* to BIGNUM = EPS / SAFMIN, where EPS is the machine epsilon and */ /* SAFMIN is the safe minimum. */ /* INDA (input) INTEGER */ /* The increment between A(1) and the next diagonal element of A. */ /* Typical values are */ /* = LDA+1: square matrices with leading dimension LDA */ /* = 2: packed upper triangular matrix, starting at A(1,1) */ /* = N: packed lower triangular matrix, starting at A(1,1) */ /* VINDA (input) INTEGER */ /* The change in the diagonal increment between columns of A. */ /* Typical values are */ /* = 0: no change, the row and column increments in A are fixed */ /* = 1: packed upper triangular matrix */ /* = -1: packed lower triangular matrix */ /* ===================================================================== */ /* .. Local Scalars .. */ /* .. */ /* .. External Functions .. */ /* .. */ /* .. Intrinsic Functions .. */ /* .. */ /* .. Executable Statements .. */ /* Parameter adjustments */ --a; /* Function Body */ bignum = slamch_("Epsilon") / slamch_("Safe minimum"); ia = 1; ixa = *inda; i__1 = *n; for (i__ = 1; i__ <= i__1; ++i__) { i__2 = ia; i__3 = ia; r__1 = a[i__3].r; q__1.r = r__1, q__1.i = bignum; a[i__2].r = q__1.r, a[i__2].i = q__1.i; ia += ixa; ixa += *vinda; /* L10: */ } return 0; } /* claipd_ */