Update to 2.0.0 tree from current Fremantle build

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

diff --git a/3rdparty/lapack/slaset.c b/3rdparty/lapack/slaset.c
new file mode 100644 (file)
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+++ b/3rdparty/lapack/slaset.c
@@ -0,0 +1,139 @@
+#include "clapack.h"
+
+/* Subroutine */ int slaset_(char *uplo, integer *m, integer *n, real *alpha, 
+       real *beta, real *a, integer *lda)
+{
+    /* System generated locals */
+    integer a_dim1, a_offset, i__1, i__2, i__3;
+
+    /* Local variables */
+    integer i__, j;
+    extern logical lsame_(char *, char *);
+
+
+/*  -- LAPACK auxiliary routine (version 3.1) -- */
+/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/*     November 2006 */
+
+/*     .. Scalar Arguments .. */
+/*     .. */
+/*     .. Array Arguments .. */
+/*     .. */
+
+/*  Purpose */
+/*  ======= */
+
+/*  SLASET initializes an m-by-n matrix A to BETA on the diagonal and */
+/*  ALPHA on the offdiagonals. */
+
+/*  Arguments */
+/*  ========= */
+
+/*  UPLO    (input) CHARACTER*1 */
+/*          Specifies the part of the matrix A to be set. */
+/*          = 'U':      Upper triangular part is set; the strictly lower */
+/*                      triangular part of A is not changed. */
+/*          = 'L':      Lower triangular part is set; the strictly upper */
+/*                      triangular part of A is not changed. */
+/*          Otherwise:  All of the matrix A is set. */
+
+/*  M       (input) INTEGER */
+/*          The number of rows of the matrix A.  M >= 0. */
+
+/*  N       (input) INTEGER */
+/*          The number of columns of the matrix A.  N >= 0. */
+
+/*  ALPHA   (input) REAL */
+/*          The constant to which the offdiagonal elements are to be set. */
+
+/*  BETA    (input) REAL */
+/*          The constant to which the diagonal elements are to be set. */
+
+/*  A       (input/output) REAL array, dimension (LDA,N) */
+/*          On exit, the leading m-by-n submatrix of A is set as follows: */
+
+/*          if UPLO = 'U', A(i,j) = ALPHA, 1<=i<=j-1, 1<=j<=n, */
+/*          if UPLO = 'L', A(i,j) = ALPHA, j+1<=i<=m, 1<=j<=n, */
+/*          otherwise,     A(i,j) = ALPHA, 1<=i<=m, 1<=j<=n, i.ne.j, */
+
+/*          and, for all UPLO, A(i,i) = BETA, 1<=i<=min(m,n). */
+
+/*  LDA     (input) INTEGER */
+/*          The leading dimension of the array A.  LDA >= max(1,M). */
+
+/* ===================================================================== */
+
+/*     .. Local Scalars .. */
+/*     .. */
+/*     .. External Functions .. */
+/*     .. */
+/*     .. Intrinsic Functions .. */
+/*     .. */
+/*     .. Executable Statements .. */
+
+    /* Parameter adjustments */
+    a_dim1 = *lda;
+    a_offset = 1 + a_dim1;
+    a -= a_offset;
+
+    /* Function Body */
+    if (lsame_(uplo, "U")) {
+
+/*        Set the strictly upper triangular or trapezoidal part of the */
+/*        array to ALPHA. */
+
+       i__1 = *n;
+       for (j = 2; j <= i__1; ++j) {
+/* Computing MIN */
+           i__3 = j - 1;
+           i__2 = min(i__3,*m);
+           for (i__ = 1; i__ <= i__2; ++i__) {
+               a[i__ + j * a_dim1] = *alpha;
+/* L10: */
+           }
+/* L20: */
+       }
+
+    } else if (lsame_(uplo, "L")) {
+
+/*        Set the strictly lower triangular or trapezoidal part of the */
+/*        array to ALPHA. */
+
+       i__1 = min(*m,*n);
+       for (j = 1; j <= i__1; ++j) {
+           i__2 = *m;
+           for (i__ = j + 1; i__ <= i__2; ++i__) {
+               a[i__ + j * a_dim1] = *alpha;
+/* L30: */
+           }
+/* L40: */
+       }
+
+    } else {
+
+/*        Set the leading m-by-n submatrix to ALPHA. */
+
+       i__1 = *n;
+       for (j = 1; j <= i__1; ++j) {
+           i__2 = *m;
+           for (i__ = 1; i__ <= i__2; ++i__) {
+               a[i__ + j * a_dim1] = *alpha;
+/* L50: */
+           }
+/* L60: */
+       }
+    }
+
+/*     Set the first min(M,N) diagonal elements to BETA. */
+
+    i__1 = min(*m,*n);
+    for (i__ = 1; i__ <= i__1; ++i__) {
+       a[i__ + i__ * a_dim1] = *beta;
+/* L70: */
+    }
+
+    return 0;
+
+/*     End of SLASET */
+
+} /* slaset_ */