Function integerify

src/crypto/scrypt.cpp:301–307

* integerify(B, r): * Return the result of parsing B_{2r-1} as a little-endian integer. */

 * Return the result of parsing B_{2r-1} as a little-endian integer.
 */
static uint64_t
integerify(const void * B, size_t r)
{
    const uint32_t * X = (const uint32_t*)((uintptr_t)(B) + (2 * r - 1) * 64);

    return (((uint64_t)(X[1]) << 32) + X[0]);
}

void SMix(uint8_t *B, unsigned int r, unsigned int N, void* _V, void* XY)
{