private int memReadDelaySlots(int regNum)
{
//partially disassemble next instruction, if the specified register is used anywhere, return 1. else return 0
int inst = memory.getMem(pc);
int rA = inst >> (inst & 0x03e00000) >> 21;
int rB = (inst & 0x001f0000) >> 16;
int rC = (inst & 0x001f);
//if immed bit is set, make rC negative so that it will not match regNum
int immed = inst >> 29;
immed &= 1;
if (immed == 1) rC = -rC;
if (rA == regNum || rB == regNum || rC == regNum) return 1;
else return 0;
}