Update to 2.0.0 tree from current Fremantle build

[opencv] / 3rdparty / lapack / dscal.c

diff --git a/3rdparty/lapack/dscal.c b/3rdparty/lapack/dscal.c
new file mode 100644 (file)
index 0000000..82e0a6c
--- /dev/null
+++ b/3rdparty/lapack/dscal.c
@@ -0,0 +1,83 @@
+#include "clapack.h"
+
+/* Subroutine */ int dscal_(integer *n, doublereal *da, doublereal *dx, 
+       integer *incx)
+{
+    /* System generated locals */
+    integer i__1, i__2;
+
+    /* Local variables */
+    integer i__, m, mp1, nincx;
+
+/*     .. Scalar Arguments .. */
+/*     .. */
+/*     .. Array Arguments .. */
+/*     .. */
+
+/*  Purpose */
+/*  ======= */
+/* * */
+/*     scales a vector by a constant. */
+/*     uses unrolled loops for increment equal to one. */
+/*     jack dongarra, linpack, 3/11/78. */
+/*     modified 3/93 to return if incx .le. 0. */
+/*     modified 12/3/93, array(1) declarations changed to array(*) */
+
+
+/*     .. Local Scalars .. */
+/*     .. */
+/*     .. Intrinsic Functions .. */
+/*     .. */
+    /* Parameter adjustments */
+    --dx;
+
+    /* Function Body */
+    if (*n <= 0 || *incx <= 0) {
+       return 0;
+    }
+    if (*incx == 1) {
+       goto L20;
+    }
+
+/*        code for increment not equal to 1 */
+
+    nincx = *n * *incx;
+    i__1 = nincx;
+    i__2 = *incx;
+    for (i__ = 1; i__2 < 0 ? i__ >= i__1 : i__ <= i__1; i__ += i__2) {
+       dx[i__] = *da * dx[i__];
+/* L10: */
+    }
+    return 0;
+
+/*        code for increment equal to 1 */
+
+
+/*        clean-up loop */
+
+L20:
+    m = *n % 5;
+    if (m == 0) {
+       goto L40;
+    }
+    i__2 = m;
+    for (i__ = 1; i__ <= i__2; ++i__) {
+       dx[i__] = *da * dx[i__];
+/* L30: */
+    }
+    if (*n < 5) {
+       return 0;
+    }
+L40:
+    mp1 = m + 1;
+    i__2 = *n;
+    for (i__ = mp1; i__ <= i__2; i__ += 5) {
+       dx[i__] = *da * dx[i__];
+       dx[i__ + 1] = *da * dx[i__ + 1];
+       dx[i__ + 2] = *da * dx[i__ + 2];
+       dx[i__ + 3] = *da * dx[i__ + 3];
+       dx[i__ + 4] = *da * dx[i__ + 4];
+/* L50: */
+    }
+    return 0;
+} /* dscal_ */