53 lines
1.2 KiB
Rust
53 lines
1.2 KiB
Rust
//! # Register
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//!
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//! This mod contains the definition of the Register structs
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//! for use within the Machine module.
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use crate::simulator::machine::{NUM_FP_REGS, NUM_INT_REGS};
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use std::ops::{Add, Sub};
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pub trait RegisterNum: Add<Output=Self> + Sub<Output=Self> + PartialEq + Copy {}
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impl RegisterNum for i64 {}
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impl RegisterNum for f32 {}
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/// Machine register array
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#[derive(PartialEq)]
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pub struct Register<U: RegisterNum> {
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/// 32 available registers of type U
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register: [U; 32]
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}
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impl<U: RegisterNum> Register<U> {
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/// Returns the current value held in register *position*
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pub fn get_reg(&self, position: u8) -> U {
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self.register[position as usize]
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}
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/// Set value of register *position* to *value*
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///
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/// Checking against trying to set a new value to the 0th register
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/// as its value is NOT supposed to change
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pub fn set_reg(&mut self, position: u8, value: U) {
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if position != 0 { self.register[position as usize] = value; }
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}
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}
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impl Register<i64> {
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/// i64 register constructor
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pub fn init() -> Register<i64> {
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Register {
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register: [0i64; NUM_INT_REGS]
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}
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}
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}
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impl Register<f32> {
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/// f32 register constructor
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pub fn init() -> Register<f32> {
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Register {
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register: [0f32; NUM_FP_REGS]
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}
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}
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} |