#include "blaswrap.h" /* zlaipd.f -- translated by f2c (version 20061008). You must link the resulting object file with libf2c: on Microsoft Windows system, link with libf2c.lib; on Linux or Unix systems, link with .../path/to/libf2c.a -lm or, if you install libf2c.a in a standard place, with -lf2c -lm -- in that order, at the end of the command line, as in cc *.o -lf2c -lm Source for libf2c is in /netlib/f2c/libf2c.zip, e.g., http://www.netlib.org/f2c/libf2c.zip */ #include "f2c.h" /* Subroutine */ int zlaipd_(integer *n, doublecomplex *a, integer *inda, integer *vinda) { /* System generated locals */ integer i__1, i__2, i__3; doublereal d__1; doublecomplex z__1; /* Local variables */ static integer i__, ia, ixa; extern doublereal dlamch_(char *); static doublereal bignum; /* -- LAPACK test routine (version 3.1) -- Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. November 2006 Purpose ======= ZLAIPD 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*16 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 ===================================================================== Parameter adjustments */ --a; /* Function Body */ bignum = dlamch_("Epsilon") / dlamch_("Safe minimum"); ia = 1; ixa = *inda; i__1 = *n; for (i__ = 1; i__ <= i__1; ++i__) { i__2 = ia; i__3 = ia; d__1 = a[i__3].r; z__1.r = d__1, z__1.i = bignum; a[i__2].r = z__1.r, a[i__2].i = z__1.i; ia += ixa; ixa += *vinda; /* L10: */ } return 0; } /* zlaipd_ */