{

public:

const char* name() const { return "dummy_rocc"; }

reg_t custom0(processor_t *p, rocc_insn_t insn, reg_t xs1, reg_t UNUSED xs2)

{

reg_t prev_acc = acc[insn.rs2];

if (insn.rs2 >= num_acc)

illegal_instruction(*p);

switch (insn.funct)

{

case 0: // acc <- xs1

acc[insn.rs2] = xs1;

break;

case 1: // xd <- acc (the only real work is the return statement below)

break;

case 2: // acc[rs2] <- Mem[xs1]

acc[insn.rs2] = p->get_mmu()->load<uint64_t>(xs1);

break;

case 3: // acc[rs2] <- accX + xs1

acc[insn.rs2] += xs1;

break;

default:

illegal_instruction(*p);

}

return prev_acc; // in all cases, xd <- previous value of acc[rs2]

}

dummy_rocc_t()

{

memset(acc, 0, sizeof(acc));

}

private:

static const int num_acc = 4;

reg_t acc[num_acc];