Instruction Struct Reference

Structure to access different parts of an instruction by value. More...

#include <cpu.hpp>

Public Member Functions
	Instruction ()
	Construct a new Instruction object.
	Instruction (uint32_t ins)
	Construct a new Instruction object.
uint32_t	opcode ()
	Opcode of the instruction. Size: 6 bits [31-26].
uint32_t	rs ()
	Source register for the instruction. Size: 5 bits [25-21].
uint32_t	rt ()
	Target register for the instruction. Size: 5 bits [20-16].
uint32_t	rd ()
	Destination register for the instruction. Size: 5 bits [15-11].
uint32_t	shamt ()
	Shift amount for the instruction. Size: 5 bits [10-6].
uint32_t	funct ()
	Function field for the instruction. Size: 6 bits [5-0].
uint32_t	imm ()
	Immediate value for the instruction. Size: 16 bits [15-0].
uint32_t	addr ()
	Address value for jump/branch instructions. Size: 26 bits [25-0].

Public Attributes
uint32_t	ins

Detailed Description

Structure to access different parts of an instruction by value.

Definition at line 15 of file cpu.hpp.

Constructor & Destructor Documentation

Instruction() [1/2]

Instruction::Instruction ( )

inline

Construct a new Instruction object.

Definition at line 23 of file cpu.hpp.

Instruction() [2/2]

Instruction::Instruction ( uint32_t ins )

inline

Construct a new Instruction object.

Parameters

ins	Instruction in the form of a 32-bit unsigned integer

Definition at line 30 of file cpu.hpp.

Member Function Documentation

addr()

uint32_t Instruction::addr ( )

inline

Address value for jump/branch instructions. Size: 26 bits [25-0].

Returns

uint32_t Address

Definition at line 88 of file cpu.hpp.

funct()

uint32_t Instruction::funct ( )

inline

Function field for the instruction. Size: 6 bits [5-0].

Used to lookup the functions in case of 'SPECIAL' instructions where the opcode is 0b000000.

Returns

uint32_t Function ID

Definition at line 74 of file cpu.hpp.

imm()

uint32_t Instruction::imm ( )

inline

Immediate value for the instruction. Size: 16 bits [15-0].

Returns

uint32_t Immediate argument

Definition at line 81 of file cpu.hpp.

opcode()

uint32_t Instruction::opcode ( )

inline

Opcode of the instruction. Size: 6 bits [31-26].

Returns

uint32_t Opcode

Definition at line 37 of file cpu.hpp.

rd()

uint32_t Instruction::rd ( )

inline

Destination register for the instruction. Size: 5 bits [15-11].

Returns

uint32_t Register ID

Definition at line 58 of file cpu.hpp.

rs()

uint32_t Instruction::rs ( )

inline

Source register for the instruction. Size: 5 bits [25-21].

Returns

uint32_t Register ID

Definition at line 44 of file cpu.hpp.

rt()

uint32_t Instruction::rt ( )

inline

Target register for the instruction. Size: 5 bits [20-16].

Returns

uint32_t Register ID

Definition at line 51 of file cpu.hpp.

shamt()

uint32_t Instruction::shamt ( )

inline

Shift amount for the instruction. Size: 5 bits [10-6].

Used in the case of shift instructions.

Returns

uint32_t Shift amount

Definition at line 66 of file cpu.hpp.

Member Data Documentation

ins

uint32_t Instruction::ins

Definition at line 17 of file cpu.hpp.

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

• include/core/cpu/cpu.hpp