Update to 2.0.0 tree from current Fremantle build

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

diff --git a/3rdparty/lapack/idamax.c b/3rdparty/lapack/idamax.c
new file mode 100644 (file)
index 0000000..b6449f0
--- /dev/null
+++ b/3rdparty/lapack/idamax.c
@@ -0,0 +1,80 @@
+#include "clapack.h"
+
+integer idamax_(integer *n, doublereal *dx, integer *incx)
+{
+    /* System generated locals */
+    integer ret_val, i__1;
+    doublereal d__1;
+
+    /* Local variables */
+    integer i__, ix;
+    doublereal dmax__;
+
+/*     .. Scalar Arguments .. */
+/*     .. */
+/*     .. Array Arguments .. */
+/*     .. */
+
+/*  Purpose */
+/*  ======= */
+
+/*     finds the index of element having max. absolute value. */
+/*     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 */
+    ret_val = 0;
+    if (*n < 1 || *incx <= 0) {
+       return ret_val;
+    }
+    ret_val = 1;
+    if (*n == 1) {
+       return ret_val;
+    }
+    if (*incx == 1) {
+       goto L20;
+    }
+
+/*        code for increment not equal to 1 */
+
+    ix = 1;
+    dmax__ = abs(dx[1]);
+    ix += *incx;
+    i__1 = *n;
+    for (i__ = 2; i__ <= i__1; ++i__) {
+       if ((d__1 = dx[ix], abs(d__1)) <= dmax__) {
+           goto L5;
+       }
+       ret_val = i__;
+       dmax__ = (d__1 = dx[ix], abs(d__1));
+L5:
+       ix += *incx;
+/* L10: */
+    }
+    return ret_val;
+
+/*        code for increment equal to 1 */
+
+L20:
+    dmax__ = abs(dx[1]);
+    i__1 = *n;
+    for (i__ = 2; i__ <= i__1; ++i__) {
+       if ((d__1 = dx[i__], abs(d__1)) <= dmax__) {
+           goto L30;
+       }
+       ret_val = i__;
+       dmax__ = (d__1 = dx[i__], abs(d__1));
+L30:
+       ;
+    }
+    return ret_val;
+} /* idamax_ */