Struct Cpu

pub struct Cpu { /* private fields */ }

An emulated CPU which implements the ARMv4T instruction set.

Implementations

impl Cpu

pub fn new() -> Cpu

Construct a new ARMv4T Cpu, with registers set to default “cold-boot” values.

Specifically, PC is set to 0x00000000, and CPSR is set to 0xd3 (ARM state, Supervisor mode, FIQ and IRQ mask bits set). Technically, the ARM spec states that all other registers can have undefined values on-boot, but in this emulator, all registers are set to 0 on-boot.

pub fn step(&mut self, mem: &mut impl Memory) -> bool

Step the CPU a single instruction with the given memory object.

As a testing convenience, this method returns false if a undefined instruction exception is triggered.

pub fn exception(&mut self, exc: Exception)

Trigger a CPU exception.

pub fn thumb_mode(&self) -> bool

Check if CPU is currently in Thumb mode.

pub fn reg_set(&mut self, mode: Mode, reg: Reg, val: u32)

Manually set a register’s value.

pub fn reg_get(&self, mode: Mode, reg: Reg) -> u32

Returns a register’s value.

pub fn mode(&self) -> Mode

Returns the current processor mode.

pub fn irq_enable(&self) -> bool

Check if IRQs are enabled.

pub fn fiq_enable(&self) -> bool

Check if FIQs are enabled.

Trait Implementations

impl Clone for Cpu

fn clone(&self) -> Cpu

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Cpu

fn fmt(&self, fmt: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Cpu

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Cpu

fn eq(&self, other: &Cpu) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Cpu

impl Eq for Cpu

impl StructuralPartialEq for Cpu