Struct PsrField 

pub struct PsrField {
    pub saved: bool,
    pub mask: u8,
}

An ARM32 program status register together with the byte fields an MSR writes to it.

The field suffix is not decoration: msr cpsr_f, r0 updates only the condition flags, while msr cpsr_c, r0 can change the processor mode and interrupt masks. Encoding one as the other would be a silent behaviour change, so the selector is carried through the IR rather than defaulted.

Fields

saved: bool

true for SPSR, false for CPSR.

mask: u8

Field mask, in the bit order the instruction encodes it: bit 0 = c (control), 1 = x (extension), 2 = s (status), 3 = f (flags).

Implementations

impl PsrField

pub fn from_lower(s: &str) -> Option<Self>

Parse cpsr / spsr, optionally suffixed with _ and any combination of the field letters c, x, s, f (or _all). Input must already be lowercase.

A bare cpsr selects the f and c fields, matching GNU as, which keeps the pre-UAL spelling meaning what it always did.

Trait Implementations

impl Clone for PsrField

fn clone(&self) -> PsrField

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PsrField

impl Debug for PsrField

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

Formats the value using the given formatter.

impl Display for PsrField

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

Formats the value using the given formatter.

impl Eq for PsrField

impl PartialEq for PsrField

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for PsrField