First commit

liblinear-2.49/blas/dscal.c

@@ -0,0 +1,52 @@
+#include "blas.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int dscal_(int *n, double *sa, double *sx, int *incx)
+{
+  long int i, m, nincx, nn, iincx;
+  double ssa;
+
+  /* scales a vector by a constant.
+     uses unrolled loops for increment equal to 1.
+     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(*) */
+
+  /* Dereference inputs */
+  nn = *n;
+  iincx = *incx;
+  ssa = *sa;
+
+  if (nn > 0 && iincx > 0)
+  {
+    if (iincx == 1) /* code for increment equal to 1 */
+    {
+      m = nn-4;
+      for (i = 0; i < m; i += 5)
+      {
+        sx[i] = ssa * sx[i];
+        sx[i+1] = ssa * sx[i+1];
+        sx[i+2] = ssa * sx[i+2];
+        sx[i+3] = ssa * sx[i+3];
+        sx[i+4] = ssa * sx[i+4];
+      }
+      for ( ; i < nn; ++i) /* clean-up loop */
+        sx[i] = ssa * sx[i];
+    }
+    else /* code for increment not equal to 1 */
+    {
+      nincx = nn * iincx;
+      for (i = 0; i < nincx; i += iincx)
+        sx[i] = ssa * sx[i];
+    }
+  }
+
+  return 0;
+} /* dscal_ */
+
+#ifdef __cplusplus
+}
+#endif