On Monday, 7 January 2019 at 14:43:29 UTC, Per Nordlöw wrote:
On Monday, 7 January 2019 at 14:39:07 UTC, Per Nordlöw wrote:
What's the preferred way of doing bitwise rotate of an
integral value in D?
Are there intrinsics for bitwise rotation available in LDC?
I just found this
ulong rotateLeft(ulong x, ubyte bits)
{
return (x << bits) | (x >> (64 - bits));
}
Questions:
- Is this a good implementation for the ulong case?
- Should we use >> or >>> ?
- What's the preferred type for `bits`, ubyte, or uint or
making it a template parameter?
There are
https://dlang.org/phobos/core_bitop.html#.rol
and
https://dlang.org/phobos/core_bitop.html#.ror
But it seems the implementation is like yours.
