int_floor_sqrt_helper< I > Struct Template Reference
#include <int.hpp>
List of all members.
Static Public Member Functions
Detailed Description
template<typename I>
struct mmx::int_floor_sqrt_helper< I >
Definition at line 459 of file int.hpp.
Member Function Documentation
| static I floor_sqrt |
( |
const I & |
x |
) |
[inline, static] |
Definition at line 460 of file int.hpp.
References ASSERT, and mmx::I().
00460 {
00461 ASSERT (x >= 0, "wrong sign");
00462 I y= x, r= 0, b= ((I) 1) << (8 * sizeof (I) - 2);
00463 while (b > y) b >>= 2;
00464 while (b != 0) {
00465 if (y >= r + b) { y -= r + b; r = (r >> 1) + b; }
00466 else r >>= 1;
00467 b >>= 2;
00468 }
00469 return r; }
The documentation for this struct was generated from the following file:
