static unsafe void memcpy (byte *dest, byte *src, int size) {
// FIXME: if pointers are not aligned, try to align them
// so a faster routine can be used. Handle the case where
// the pointers can't be reduced to have the same alignment
// (just ignore the issue on x86?)
if ((((int)dest | (int)src) & 3) != 0) {
if (((int)dest & 1) != 0 && ((int)src & 1) != 0 && size >= 1) {
dest [0] = src [0];
++dest;
++src;
--size;
}
if (((int)dest & 2) != 0 && ((int)src & 2) != 0 && size >= 2) {
((short*)dest) [0] = ((short*)src) [0];
dest += 2;
src += 2;
size -= 2;
}
if ((((int)dest | (int)src) & 1) != 0) {
memcpy1 (dest, src, size);
return;
}
if ((((int)dest | (int)src) & 2) != 0) {
memcpy2 (dest, src, size);
return;
}
}
memcpy4 (dest, src, size);
}
