e3181f26b1
Changed MPI routines to hypre_MPI routines. Added hypre_printf, etc. routines. Added AUTOTEST tests to look for 'int' and 'MPI_' calls. Added a new approach for the Fortran interface (not implemented everywhere yet).
83 lines
1.7 KiB
C
83 lines
1.7 KiB
C
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#include "hypre_blas.h"
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#include "f2c.h"
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/* Subroutine */ HYPRE_Int dswap_(integer *n, doublereal *dx, integer *incx,
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doublereal *dy, integer *incy)
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{
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/* System generated locals */
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integer i__1;
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/* Local variables */
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static integer i__, m;
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static doublereal dtemp;
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static integer ix, iy, mp1;
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/* interchanges two vectors.
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uses unrolled loops for increments equal one.
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jack dongarra, linpack, 3/11/78.
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modified 12/3/93, array(1) declarations changed to array(*)
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Parameter adjustments */
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--dy;
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--dx;
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/* Function Body */
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if (*n <= 0) {
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return 0;
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}
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if (*incx == 1 && *incy == 1) {
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goto L20;
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}
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/* code for unequal increments or equal increments not equal
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to 1 */
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ix = 1;
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iy = 1;
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if (*incx < 0) {
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ix = (-(*n) + 1) * *incx + 1;
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}
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if (*incy < 0) {
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iy = (-(*n) + 1) * *incy + 1;
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}
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i__1 = *n;
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for (i__ = 1; i__ <= i__1; ++i__) {
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dtemp = dx[ix];
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dx[ix] = dy[iy];
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dy[iy] = dtemp;
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ix += *incx;
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iy += *incy;
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/* L10: */
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}
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return 0;
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/* code for both increments equal to 1
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clean-up loop */
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L20:
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m = *n % 3;
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if (m == 0) {
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goto L40;
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}
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i__1 = m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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dtemp = dx[i__];
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dx[i__] = dy[i__];
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dy[i__] = dtemp;
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/* L30: */
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}
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if (*n < 3) {
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return 0;
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}
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L40:
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mp1 = m + 1;
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i__1 = *n;
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for (i__ = mp1; i__ <= i__1; i__ += 3) {
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dtemp = dx[i__];
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dx[i__] = dy[i__];
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dy[i__] = dtemp;
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dtemp = dx[i__ + 1];
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dx[i__ + 1] = dy[i__ + 1];
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dy[i__ + 1] = dtemp;
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dtemp = dx[i__ + 2];
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dx[i__ + 2] = dy[i__ + 2];
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dy[i__ + 2] = dtemp;
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/* L50: */
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}
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return 0;
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} /* dswap_ */
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