Update to 2.0.0 tree from current Fremantle build

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

diff --git a/3rdparty/lapack/sger.c b/3rdparty/lapack/sger.c
new file mode 100644 (file)
index 0000000..cbaa99f
--- /dev/null
+++ b/3rdparty/lapack/sger.c
@@ -0,0 +1,180 @@
+#include "clapack.h"
+
+/* Subroutine */ int sger_(integer *m, integer *n, real *alpha, real *x, 
+       integer *incx, real *y, integer *incy, real *a, integer *lda)
+{
+    /* System generated locals */
+    integer a_dim1, a_offset, i__1, i__2;
+
+    /* Local variables */
+    integer i__, j, ix, jy, kx, info;
+    real temp;
+    extern /* Subroutine */ int xerbla_(char *, integer *);
+
+/*     .. Scalar Arguments .. */
+/*     .. */
+/*     .. Array Arguments .. */
+/*     .. */
+
+/*  Purpose */
+/*  ======= */
+
+/*  SGER   performs the rank 1 operation */
+
+/*     A := alpha*x*y' + A, */
+
+/*  where alpha is a scalar, x is an m element vector, y is an n element */
+/*  vector and A is an m by n matrix. */
+
+/*  Arguments */
+/*  ========== */
+
+/*  M      - INTEGER. */
+/*           On entry, M specifies the number of rows of the matrix A. */
+/*           M must be at least zero. */
+/*           Unchanged on exit. */
+
+/*  N      - INTEGER. */
+/*           On entry, N specifies the number of columns of the matrix A. */
+/*           N must be at least zero. */
+/*           Unchanged on exit. */
+
+/*  ALPHA  - REAL            . */
+/*           On entry, ALPHA specifies the scalar alpha. */
+/*           Unchanged on exit. */
+
+/*  X      - REAL             array of dimension at least */
+/*           ( 1 + ( m - 1 )*abs( INCX ) ). */
+/*           Before entry, the incremented array X must contain the m */
+/*           element vector x. */
+/*           Unchanged on exit. */
+
+/*  INCX   - INTEGER. */
+/*           On entry, INCX specifies the increment for the elements of */
+/*           X. INCX must not be zero. */
+/*           Unchanged on exit. */
+
+/*  Y      - REAL             array of dimension at least */
+/*           ( 1 + ( n - 1 )*abs( INCY ) ). */
+/*           Before entry, the incremented array Y must contain the n */
+/*           element vector y. */
+/*           Unchanged on exit. */
+
+/*  INCY   - INTEGER. */
+/*           On entry, INCY specifies the increment for the elements of */
+/*           Y. INCY must not be zero. */
+/*           Unchanged on exit. */
+
+/*  A      - REAL             array of DIMENSION ( LDA, n ). */
+/*           Before entry, the leading m by n part of the array A must */
+/*           contain the matrix of coefficients. On exit, A is */
+/*           overwritten by the updated matrix. */
+
+/*  LDA    - INTEGER. */
+/*           On entry, LDA specifies the first dimension of A as declared */
+/*           in the calling (sub) program. LDA must be at least */
+/*           max( 1, m ). */
+/*           Unchanged on exit. */
+
+
+/*  Level 2 Blas routine. */
+
+/*  -- Written on 22-October-1986. */
+/*     Jack Dongarra, Argonne National Lab. */
+/*     Jeremy Du Croz, Nag Central Office. */
+/*     Sven Hammarling, Nag Central Office. */
+/*     Richard Hanson, Sandia National Labs. */
+
+
+/*     .. Parameters .. */
+/*     .. */
+/*     .. Local Scalars .. */
+/*     .. */
+/*     .. External Subroutines .. */
+/*     .. */
+/*     .. Intrinsic Functions .. */
+/*     .. */
+
+/*     Test the input parameters. */
+
+    /* Parameter adjustments */
+    --x;
+    --y;
+    a_dim1 = *lda;
+    a_offset = 1 + a_dim1;
+    a -= a_offset;
+
+    /* Function Body */
+    info = 0;
+    if (*m < 0) {
+       info = 1;
+    } else if (*n < 0) {
+       info = 2;
+    } else if (*incx == 0) {
+       info = 5;
+    } else if (*incy == 0) {
+       info = 7;
+    } else if (*lda < max(1,*m)) {
+       info = 9;
+    }
+    if (info != 0) {
+       xerbla_("SGER  ", &info);
+       return 0;
+    }
+
+/*     Quick return if possible. */
+
+    if (*m == 0 || *n == 0 || *alpha == 0.f) {
+       return 0;
+    }
+
+/*     Start the operations. In this version the elements of A are */
+/*     accessed sequentially with one pass through A. */
+
+    if (*incy > 0) {
+       jy = 1;
+    } else {
+       jy = 1 - (*n - 1) * *incy;
+    }
+    if (*incx == 1) {
+       i__1 = *n;
+       for (j = 1; j <= i__1; ++j) {
+           if (y[jy] != 0.f) {
+               temp = *alpha * y[jy];
+               i__2 = *m;
+               for (i__ = 1; i__ <= i__2; ++i__) {
+                   a[i__ + j * a_dim1] += x[i__] * temp;
+/* L10: */
+               }
+           }
+           jy += *incy;
+/* L20: */
+       }
+    } else {
+       if (*incx > 0) {
+           kx = 1;
+       } else {
+           kx = 1 - (*m - 1) * *incx;
+       }
+       i__1 = *n;
+       for (j = 1; j <= i__1; ++j) {
+           if (y[jy] != 0.f) {
+               temp = *alpha * y[jy];
+               ix = kx;
+               i__2 = *m;
+               for (i__ = 1; i__ <= i__2; ++i__) {
+                   a[i__ + j * a_dim1] += x[ix] * temp;
+                   ix += *incx;
+/* L30: */
+               }
+           }
+           jy += *incy;
+/* L40: */
+       }
+    }
+
+    return 0;
+
+/*     End of SGER  . */
+
+} /* sger_ */