altos: Rename 'core' to 'kernel'

[fw/altos] / src / core / ao_sqrt.c

diff --git a/src/core/ao_sqrt.c b/src/core/ao_sqrt.c
deleted file mode 100644 (file)
index 3a550ea..0000000
--- a/src/core/ao_sqrt.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright © 2011 Keith Packard <keithp@keithp.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-#ifndef AO_FLIGHT_TEST
-#include "ao.h"
-#endif
-
-/* Adapted from int_sqrt.c in the linux kernel, which is licensed GPLv2 */
-/**
- * int_sqrt - rough approximation to sqrt
- * @x: integer of which to calculate the sqrt
- *
- * A very rough approximation to the sqrt() function.
- */
-
-uint32_t
-ao_sqrt(uint32_t op)
-{
-       uint32_t        res = 0;
-       uint32_t        one = 1UL << (sizeof (one) * 8 - 2);
-
-       while (one > op)
-               one >>= 2;
-
-       while (one != 0) {
-               if (op >= res + one) {
-                       op = op - (res + one);
-                       res = res +  2 * one;
-               }
-               res /= 2;
-               one /= 4;
-       }
-       return res;
-}