NODE(sl_node_var_t, var)
{
size_t frame;
sl_compile_state_t* xcs = cs;
size_t index = 0xCAFE;
SLVAL err;
frame = 0;
while(xcs) {
if(sl_st_lookup(xcs->vars, (sl_st_data_t)node->name, (sl_st_data_t*)&index)) {
if(frame == 0) {
op_mov(cs, index, dest);
} else {
op_get_outer(cs, frame, index, dest);
mark_upper_scopes_as_closure_unsafe(cs, frame);
}
return;
}
xcs = xcs->parent;
frame++;
}
err = sl_make_formatted_string(cs->vm, "Undefined variable %QV", node->name);
err = sl_make_error2(cs->vm, cs->vm->lib.NameError, err);
sl_error_add_frame(cs->vm, err, sl_make_cstring(cs->vm, "<compiler>"), sl_make_cstring(cs->vm, (char*)cs->section->filename), sl_make_int(cs->vm, node->base.line));
sl_throw(cs->vm, err);
}
void Interpreter::step()
{
if (instruction >= file->getCodeWordCount()) return;
if (system->getTick() < waitUntil)
return;
const uint16_t *code = file->getCode();
if (code[instruction] & (1 << 11))
{
// Short format
unsigned opcode = (code[instruction] & 0x0700) >> 8;
int argDiff = (int8_t) (code[instruction] & 0xFF);
uint16_t arguments[2];
switch(opcode)
{
case 0: // SHORT_OP_MOV
arguments[0] = argDiff + code[instruction + 1];
arguments[1] = code[instruction + 1];
instruction += 2;
op_mov(0, arguments);
break;
case 1: // SHORT_OP_ACQUIRE
arguments[0] = argDiff;
instruction += 1;
op_acquire(0, arguments);
break;
case 2: // SHORT_OP_RELEASE
arguments[0] = argDiff;
instruction += 1;
op_release(0, arguments);
break;
case 3: // SHORT_OP_SUBCALL
arguments[0] = argDiff + code[instruction + 1]; // Subroutine
arguments[1] = code[instruction + 1]; // Caller ID
instruction += 2; // Instruction has to be on the next before
// branching to subroutine so it can be used as return inst.
op_subcall(0, arguments);
break;
default:
throw std::runtime_error("Invalid short opcode.");
}
}
void Step()
{
Opcodes OP = (Opcodes)Fetch8();
//printf("%08X:%08X\n", Registers[sp], Registers[pc]);
switch (OP)
{
case O_NOP:
op_nop();
break;
case O_MOV:
op_mov();
break;
case O_ADD:
op_add();
break;
case O_SUB:
op_sub();
break;
case O_MUL:
op_mul();
break;
case O_DIV:
op_div();
break;
case O_LI:
op_li();
break;
case O_MOVF:
op_movf();
break;
case O_ADDF:
op_addf();
break;
case O_SUBF:
op_subf();
break;
case O_MULF:
op_mulf();
break;
case O_DIVF:
op_divf();
break;
case O_LIF:
op_lif();
break;
case O_XOR:
op_xor();
break;
case O_AND:
op_and();
break;
case O_MOD:
op_mod();
break;
case O_OR:
op_or();
break;
case O_NOT:
op_not();
break;
case O_SHR:
op_shr();
break;
case O_SHL:
op_shl();
break;
case O_PUSH:
op_push();
break;
case O_POP:
op_pop();
break;
case O_STB:
op_stb();
break;
case O_LDB:
op_ldb();
break;
case O_STH:
op_sth();
break;
case O_LDH:
op_ldh();
break;
case O_STW:
op_stw();
break;
case O_LDW:
op_ldw();
break;
case O_LDF:
op_ldf();
break;
case O_STF:
op_stf();
break;
case O_CMP:
op_cmp();
break;
case O_B:
op_b(0);
break;
case O_BC:
op_b(1);
break;
case O_BEQ:
op_bcond(ctr0_eq);
break;
case O_BNE:
op_bcond(ctr0_ne);
break;
case O_BGT:
op_bcond(ctr0_gt);
break;
case O_BLT:
op_bcond(ctr0_lt);
break;
case O_BTC:
op_btc();
break;
case O_INC:
op_inc();
break;
case O_DEC:
op_dec();
break;
default:
Error("Error: Unknown Opcode PC = %d OP = %08X\n", Registers[pc], OP);
}
Ticks++;
}
