icopy.c

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/* icopy.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"
#include "blaswrap.h"

/* Subroutine */ int icopy_(integer *n, integer *sx, integer *incx, integer *
        sy, integer *incy)
{
    /* System generated locals */
    integer i__1;

    /* Local variables */
    integer i__, m, ix, iy, mp1;


/*  -- LAPACK auxiliary test routine (version 3.1) -- */
/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
/*     November 2006 */

/*     .. Scalar Arguments .. */
/*     .. */
/*     .. Array Arguments .. */
/*     .. */

/*  Purpose */
/*  ======= */

/*  ICOPY copies an integer vector x to an integer vector y. */
/*  Uses unrolled loops for increments equal to 1. */

/*  Arguments */
/*  ========= */

/*  N       (input) INTEGER */
/*          The length of the vectors SX and SY. */

/*  SX      (input) INTEGER array, dimension (1+(N-1)*abs(INCX)) */
/*          The vector X. */

/*  INCX    (input) INTEGER */
/*          The spacing between consecutive elements of SX. */

/*  SY      (output) INTEGER array, dimension (1+(N-1)*abs(INCY)) */
/*          The vector Y. */

/*  INCY    (input) INTEGER */
/*          The spacing between consecutive elements of SY. */

/*  ===================================================================== */

/*     .. Local Scalars .. */
/*     .. */
/*     .. Intrinsic Functions .. */
/*     .. */
/*     .. Executable Statements .. */

    /* Parameter adjustments */
    --sy;
    --sx;

    /* Function Body */
    if (*n <= 0) {
        return 0;
    }
    if (*incx == 1 && *incy == 1) {
        goto L20;
    }

/*     Code for unequal increments or equal increments not equal to 1 */

    ix = 1;
    iy = 1;
    if (*incx < 0) {
        ix = (-(*n) + 1) * *incx + 1;
    }
    if (*incy < 0) {
        iy = (-(*n) + 1) * *incy + 1;
    }
    i__1 = *n;
    for (i__ = 1; i__ <= i__1; ++i__) {
        sy[iy] = sx[ix];
        ix += *incx;
        iy += *incy;
/* L10: */
    }
    return 0;

/*     Code for both increments equal to 1 */

/*     Clean-up loop */

L20:
    m = *n % 7;
    if (m == 0) {
        goto L40;
    }
    i__1 = m;
    for (i__ = 1; i__ <= i__1; ++i__) {
        sy[i__] = sx[i__];
/* L30: */
    }
    if (*n < 7) {
        return 0;
    }
L40:
    mp1 = m + 1;
    i__1 = *n;
    for (i__ = mp1; i__ <= i__1; i__ += 7) {
        sy[i__] = sx[i__];
        sy[i__ + 1] = sx[i__ + 1];
        sy[i__ + 2] = sx[i__ + 2];
        sy[i__ + 3] = sx[i__ + 3];
        sy[i__ + 4] = sx[i__ + 4];
        sy[i__ + 5] = sx[i__ + 5];
        sy[i__ + 6] = sx[i__ + 6];
/* L50: */
    }
    return 0;

/*     End of ICOPY */

} /* icopy_ */