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75 lines
2.0 KiB
75 lines
2.0 KiB
use std::collections::VecDeque;
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use crsn::asm::data::literal::Value;
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use crsn::asm::instr::op::{EvalRes, OpTrait};
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use crsn::runtime::fault::Fault;
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use crsn::runtime::run_thread::{RunState, ThreadInfo};
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use crate::defs::StackOp;
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struct Stacks {
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stacks: Vec<VecDeque<Value>>,
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}
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impl Default for Stacks {
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fn default() -> Self {
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Stacks {
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stacks: vec![VecDeque::default(); 8],
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}
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}
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}
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impl OpTrait for StackOp {
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fn execute(&self, _ti: &ThreadInfo, state: &mut RunState) -> Result<EvalRes, Fault> {
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let eres = EvalRes::default();
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match self {
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StackOp::Push { num, src } => {
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state.frame.status.clear();
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let stack_num = state.frame.read(*num)?;
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let val = state.frame.read(*src)?;
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if stack_num > 8 {
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state.frame.status.invalid = true;
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} else {
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let obj: &mut Stacks = state.ext_mut();
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obj.stacks[stack_num as usize].push_back(val);
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}
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}
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StackOp::Pop { dst, num } => {
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state.frame.status.clear();
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let stack_num = state.frame.read(*num)?;
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if stack_num > 8 {
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state.frame.status.invalid = true;
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} else {
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let obj: &mut Stacks = state.ext_mut();
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let val = obj.stacks[stack_num as usize].pop_back();
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if obj.stacks[stack_num as usize].is_empty() {
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state.frame.status.zero = true;
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}
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let val = match val {
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None => {
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state.frame.status.overflow = true;
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0
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}
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Some(val) => {
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val
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}
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};
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state.frame.write(*dst, val)?;
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}
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// TODO
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}
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}
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Ok(eres)
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}
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//
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}
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