Enum Register64Bit 

#[repr(u8)]
pub enum Register64Bit {
    RAX = 0,
    RCX = 1,
    RDX = 2,
    RBX = 3,
    RSP = 4,
    RBP = 5,
    RSI = 6,
    RDI = 7,
    R8 = 8,
    R9 = 9,
    R10 = 10,
    R11 = 11,
    R12 = 12,
    R13 = 13,
    R14 = 14,
    R15 = 15,
}

Register 0 (RAX) is defined on this enumeration but optimal encodings of it in combination with mnemonics exist and should be preferred as they increase code density.

Registers 8 to 15 when encoded decrease code density (ie they are less efficiently encoded than registers 1 to 7).

Variants

RAX = 0

Register 0.

Contains the integer return value from a function call when using the System V Application Binary Interface (ABI) for AMD64.

Contains the integer return value from a function call when using the Microsoft x64 Calling Convention.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

RCX = 1

Register 1.

Contains the fourth integer function argument to a function call when using the System V Application Binary Interface for x86-64.

Contains the first integer function argument to a function call when using the Microsoft x64 Calling Convention.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

RDX = 2

Register 2.

Contains the third integer function argument to a function call when using the System V Application Binary Interface for x86-64.

Contains the second integer function argument to a function call when using the Microsoft x64 Calling Convention.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

When returning 128-bit integer values, contains the high bits of such as value (and RAX / SystemVApplicationBinaryInterface64IntegerFunctionReturn contains the low bits).

Useful for returning tuples of 64-bit values.

RBX = 3

Register 3.

A callee-saved register: a called function must preserve the value in this register when using the System V Application Binary Interface (ABI) for AMD64. In other words, upon returning, it should make sure the value originally in this register when the call was made is the current value of this register.

RSP = 4

Register 4.

Contains the stack pointer.

When using the System V Application Binary Interface (ABI) for AMD64, the stack moves downward and function arguments that did not fit into registers are passed on the stack in reversed order.

RBP = 5

Register 5.

A callee-saved register: a called function must preserve the value in this register when using the System V Application Binary Interface (ABI) for AMD64. In other words, upon returning, it should make sure the value originally in this register when the call was made is the current value of this register.

May contain the frame pointer; not needed for leaf functions.

RSI = 6

Register 6.

The ‘source’ operand in string instructions.

Contains the second integer function argument to a function call when using the System V Application Binary Interface for x86-64.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

RDI = 7

Register 7.

The ‘destination’ operand in string instructions.

Contains the first integer function argument to a function call when using the System V Application Binary Interface for x86-64.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

R8 = 8

Register 8.

Contains the fifth integer function argument to a function call when using the System V Application Binary Interface for x86-64.

Contains the third integer function argument to a function call when using the Microsoft x64 Calling Convention.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

R9 = 9

Register 9.

Contains the sixth integer function argument to a function call when using the System V Application Binary Interface for x86-64.

Contains the fourth integer function argument to a function call when using the Microsoft x64 Calling Convention.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

R10 = 10

Register 10.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

Contains a function’s static chain pointer (used for nested functions).

R11 = 11

Register 11.

A scratch register (also known as a temporary or (function) caller-saved register) when using the System V Application Binary Interface (ABI) for AMD64.

R12 = 12

Register 12.

A callee-saved register: a called function must preserve the value in this register when using the System V Application Binary Interface (ABI) for AMD64. In other words, upon returning, it should make sure the value originally in this register when the call was made is the current value of this register.

R13 = 13

Register 13.

A callee-saved register: a called function must preserve the value in this register when using the System V Application Binary Interface (ABI) for AMD64. In other words, upon returning, it should make sure the value originally in this register when the call was made is the current value of this register.

R14 = 14

Register 14.

A callee-saved register: a called function must preserve the value in this register when using the System V Application Binary Interface (ABI) for AMD64. In other words, upon returning, it should make sure the value originally in this register when the call was made is the current value of this register.

R15 = 15

Register 15.

A callee-saved register: a called function must preserve the value in this register when using the System V Application Binary Interface (ABI) for AMD64. In other words, upon returning, it should make sure the value originally in this register when the call was made is the current value of this register.

May also be used a ‘GOT’ pointer for relocations of location-independent code.

Implementations

impl Register64Bit

pub const SystemVApplicationBinaryInterface64HighIntegerFunctionReturn: Self = Register64Bit::RDX

When returning 128-bit integer values, contains the high bits of such as value (and RAX / SystemVApplicationBinaryInterface64IntegerFunctionReturn contains the low bits).

Useful for returning tuples of 64-bit values.

Trait Implementations

impl Clone for Register64Bit

fn clone(&self) -> Register64Bit

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Register64Bit

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

Formats the value using the given formatter.

impl Default for Register64Bit

fn default() -> Self

Returns the “default value” for a type.

impl GeneralPurposeRegister for Register64Bit

const SystemVApplicationBinaryInterface64IntegerFunctionReturn: Self = Register64Bit::RAX

Contains the integer return value from a function call when using the System V Application Binary Interface (ABI) for AMD64.

const SystemVApplicationBinaryInterface64IntegerFunctionArgument2: Self = Register64Bit::RDX

Contains the third integer function argument to a function call when using the System V Application Binary Interface for x86-64.

const SystemVApplicationBinaryInterface64IntegerFunctionArgument3: Self = Register64Bit::RCX

Contains the fourth integer function argument to a function call when using the System V Application Binary Interface for x86-64.

const MicrosoftX64CallingConventionIntegerFunctionArgumentReturn: Self = Register64Bit::RAX

Contains the integer return value from a function call when using the Microsoft x64 Calling Convention.

const MicrosoftX64CallingConventionIntegerFunctionArgument0: Self = Register64Bit::RCX

Contains the first integer function argument to a function call when using the Microsoft x64 Calling Convention.

const MicrosoftX64CallingConventionIntegerFunctionArgument1: Self = Register64Bit::RDX

Contains the second integer function argument to a function call when using the Microsoft x64 Calling Convention.

impl Hash for Register64Bit

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Into<Register16Bit> for Register64Bit

fn into(self) -> Register16Bit

Converts this type into the (usually inferred) input type.

impl Into<Register32Bit> for Register64Bit

fn into(self) -> Register32Bit

Converts this type into the (usually inferred) input type.

impl Into<Register64Bit> for Register16Bit

fn into(self) -> Register64Bit

Converts this type into the (usually inferred) input type.

impl Into<Register64Bit> for Register32Bit

fn into(self) -> Register64Bit

Converts this type into the (usually inferred) input type.

impl Into<Register64Bit> for Register8Bit

fn into(self) -> Register64Bit

Converts this type into the (usually inferred) input type.

impl Into<Register64Bit> for RegisterHigh8BitsOf16Bits

fn into(self) -> Register64Bit

Converts this type into the (usually inferred) input type.

impl Into<Register8Bit> for Register64Bit

fn into(self) -> Register8Bit

Converts this type into the (usually inferred) input type.

impl Into<u8> for Register64Bit

fn into(self) -> u8

Converts this type into the (usually inferred) input type.

impl LowGeneralPurposeRegister for Register64Bit

const SystemVApplicationBinaryInterface64IntegerFunctionArgument0: Self = Register64Bit::RDI

Contains the first integer function argument to a function call when using the System V Application Binary Interface for x86-64.

const SystemVApplicationBinaryInterface64IntegerFunctionArgument1: Self = Register64Bit::RSI

Contains the second integer function argument to a function call when using the System V Application Binary Interface for x86-64.

const SystemVApplicationBinaryInterface64IntegerFunctionArgument4: Self = Register64Bit::R8

Contains the fifth integer function argument to a function call when using the System V Application Binary Interface for x86-64.

const SystemVApplicationBinaryInterface64IntegerFunctionArgument5: Self = Register64Bit::R9

Contains the sixth integer function argument to a function call when using the System V Application Binary Interface for x86-64.

const MicrosoftX64CallingConventionIntegerFunctionArgument2: Self = Register64Bit::R8

Contains the third integer function argument to a function call when using the Microsoft x64 Calling Convention.

const MicrosoftX64CallingConventionIntegerFunctionArgument3: Self = Register64Bit::R9

Contains the fourth integer function argument to a function call when using the Microsoft x64 Calling Convention.

impl Ord for Register64Bit

fn cmp(&self, other: &Register64Bit) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Register64Bit

fn eq(&self, other: &Register64Bit) -> 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 PartialOrd for Register64Bit

fn partial_cmp(&self, other: &Register64Bit) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Register for Register64Bit

fn index(self) -> u8

Zero-based index of this register.

impl Copy for Register64Bit

impl Eq for Register64Bit

impl StructuralPartialEq for Register64Bit