protected internal static void init(SceMT19937 mt19937, int seed)
{
mt19937.mt[0] = seed;
for (int mti = 1; mti < N; mti++)
{
mt19937.mt[mti] = 69069 * mt19937.mt[mti - 1];
}
mt19937.mti = N;
}
public virtual int sceMt19937Init(TPointer mt19937Addr, int seed)
{
SceMT19937 mt19937 = new SceMT19937();
MT19937.init(mt19937, seed);
mt19937.write(mt19937Addr);
return(0);
}
public virtual int sceMt19937UInt(SceMT19937 mt19937)
{
int random = MT19937.getInt(mt19937);
//if (log.DebugEnabled)
{
Console.WriteLine(string.Format("sceMt19937UInt returning 0x{0:X8}", random));
}
mt19937.write(Memory.Instance);
return(random);
}
protected internal static int getInt(SceMT19937 mt19937)
{
if (mt19937.mti >= N)
{
// Generate N words at one time
if (mt19937.mti == N + 1)
{
// init has not been called
init(mt19937, 4357);
}
int kk;
for (kk = 0; kk < N - M; kk++)
{
int y = (mt19937.mt[kk] & UPPER_MASK) | (mt19937.mt[kk + 1] & LOWER_MASK);
mt19937.mt[kk] = mt19937.mt[kk + M] ^ ((int)((uint)y >> 1)) ^ mag01[y & 0x1];
}
for (; kk < N - 1; kk++)
{
int y = (mt19937.mt[kk] & UPPER_MASK) | (mt19937.mt[kk + 1] & LOWER_MASK);
mt19937.mt[kk] = mt19937.mt[kk + (M - N)] ^ ((int)((uint)y >> 1)) ^ mag01[y & 0x1];
}
int y = (mt19937.mt[N - 1] & UPPER_MASK) | (mt19937.mt[0] & LOWER_MASK);
mt19937.mt[N - 1] = mt19937.mt[M - 1] ^ ((int)((uint)y >> 1)) ^ mag01[y & 0x1];
mt19937.mti = 0;
}
long y = mt19937.mt[mt19937.mti++];
y ^= y >> TEMPERING_SHIFT_U;
y ^= (y << TEMPERING_SHIFT_S) & TEMPERING_MASK_B;
y ^= (y << TEMPERING_SHIFT_T) & TEMPERING_MASK_C;
y ^= (y >> TEMPERING_SHIFT_L);
return((int)y);
}
