mood.c: Trivial cosmetics for int_sqrt().

[paraslash.git] / mood.c

diff --git a/mood.c b/mood.c
index c24b3d8b9da25c011e237b40e4508b0b61894598..e9c5bd6e0e60ca55e5fc3bb4e67234bdf51fc193 100644 (file)
--- a/mood.c
+++ b/mood.c
@@ -121,27 +121,23 @@ __a_const static uint32_t fls64(uint64_t v)
 }
 
 /*
- * Rough approximation to sqrt.
+ * Compute the integer square root floor(sqrt(x)).
  *
- * It returns an integer res with res * res <= x. Taken 2007 from the linux
- * source tree.
+ * Taken 2007 from the linux source tree.
  */
 __a_const static uint64_t int_sqrt(uint64_t x)
 {
-       uint64_t op, res, one = 1;
-       op = x;
-       res = 0;
+       uint64_t op = x, res = 0, one = 1;
 
        one = one << (fls64(x) & ~one);
        while (one != 0) {
                if (op >= res + one) {
                        op = op - (res + one);
-                       res = res +  2 * one;
+                       res = res + 2 * one;
                }
                res /= 2;
                one /= 4;
        }
-//     PARA_NOTICE_LOG("sqrt(%llu) = %llu\n", x, res);
        return res;
 }