contur::ICPU Class Reference

Abstract CPU interface. More...

#include <i_cpu.h>

Inheritance diagram for contur::ICPU:

Public Member Functions
virtual	~ICPU ()=default
virtual Interrupt	step (RegisterFile &regs)=0
	Performs a single fetch-decode-execute cycle.
virtual void	reset () noexcept=0
	Resets the CPU's internal state (flags, etc.).

Protected Member Functions
	ICPU ()=default
	ICPU (const ICPU &)=default
ICPU &	operator= (const ICPU &)=default
	ICPU (ICPU &&)=default
ICPU &	operator= (ICPU &&)=default

Detailed Description

Abstract CPU interface.

The CPU reads instructions from memory (referenced internally), decodes them, and executes using the provided RegisterFile. Each call to step() performs one fetch-decode-execute cycle.

Definition at line 20 of file i_cpu.h.

Constructor & Destructor Documentation

~ICPU()

virtual contur::ICPU::~ICPU ( )

virtualdefault

ICPU() [1/3]

contur::ICPU::ICPU ( )

protecteddefault

ICPU() [2/3]

contur::ICPU::ICPU ( const ICPU & )

protecteddefault

ICPU() [3/3]

contur::ICPU::ICPU ( ICPU && )

protecteddefault

Member Function Documentation

operator=() [1/2]

ICPU & contur::ICPU::operator= ( const ICPU & )

protecteddefault

operator=() [2/2]

ICPU & contur::ICPU::operator= ( ICPU && )

protecteddefault

reset()

virtual void contur::ICPU::reset ( )

pure virtualnoexcept

Resets the CPU's internal state (flags, etc.).

Implemented in contur::Cpu.

step()

virtual Interrupt contur::ICPU::step ( RegisterFile & regs )

nodiscardpure virtual

Performs a single fetch-decode-execute cycle.

Reads the instruction at the address given by the Program Counter in regs, decodes it, executes it (updating regs and possibly memory), and advances the PC.

Parameters

regs	The register file for the currently running process.

Returns

An Interrupt code indicating the result:

• Interrupt::Ok — normal execution, continue
• Interrupt::Exit — process requested termination (Halt/Int Exit)
• Interrupt::DivByZero — division by zero fault
• Interrupt::SystemCall — software interrupt (syscall)
• Interrupt::DeviceIO — I/O interrupt
• Interrupt::Error — generic error (invalid instruction, etc.)

Implemented in contur::Cpu.

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The documentation for this class was generated from the following file:

• include/contur/cpu/i_cpu.h