46 lines
1.1 KiB
C++
46 lines
1.1 KiB
C++
#ifdef __cplusplus
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extern "C" {
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#endif
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#include "lmp_f2c.h"
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int dscal_(integer *n, doublereal *da, doublereal *dx, integer *incx)
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{
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integer i__1, i__2;
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integer i__, m, mp1, nincx;
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--dx;
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if (*n <= 0 || *incx <= 0 || *da == 1.) {
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return 0;
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}
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if (*incx == 1) {
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m = *n % 5;
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if (m != 0) {
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i__1 = m;
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for (i__ = 1; i__ <= i__1; ++i__) {
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dx[i__] = *da * dx[i__];
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}
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if (*n < 5) {
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return 0;
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}
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}
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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__ += 5) {
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dx[i__] = *da * dx[i__];
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dx[i__ + 1] = *da * dx[i__ + 1];
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dx[i__ + 2] = *da * dx[i__ + 2];
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dx[i__ + 3] = *da * dx[i__ + 3];
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dx[i__ + 4] = *da * dx[i__ + 4];
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}
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} else {
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nincx = *n * *incx;
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i__1 = nincx;
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i__2 = *incx;
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for (i__ = 1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) {
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dx[i__] = *da * dx[i__];
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}
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}
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return 0;
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}
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#ifdef __cplusplus
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}
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#endif
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