Struct Cpsr

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pub struct Cpsr { /* private fields */ }

Expand description

CPSR (Current Program Status Register)

Implementations§

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impl Cpsr

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pub const ZERO: Self

Creates a new instance with a raw value of 0. Equivalent to [Self::new_with_raw_value(0)].

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pub const fn raw_value(&self) -> u32

Returns the underlying raw value of this bitfield

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pub const fn new_with_raw_value(value: u32) -> Cpsr

Creates a new instance of this bitfield with the given raw value.

No checks are performed on the value, so it is possible to set bits that don’t have any accessors specified.

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pub const fn n(&self) -> bool

Negative Result from ALU

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pub const fn z(&self) -> bool

Zero Result from ALU

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pub const fn c(&self) -> bool

ALU operation Carry Out

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pub const fn v(&self) -> bool

ALU operation Overflow

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pub const fn q(&self) -> bool

Cumulative Saturation

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pub const fn j(&self) -> bool

Jazelle State

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pub const fn e(&self) -> bool

Endianness

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pub const fn with_e(&self, field_value: bool) -> Self

Endianness

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pub fn set_e(&mut self, field_value: bool)

Endianness

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pub const fn a(&self) -> bool

Asynchronous Aborts

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pub const fn with_a(&self, field_value: bool) -> Self

Asynchronous Aborts

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pub fn set_a(&mut self, field_value: bool)

Asynchronous Aborts

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pub const fn i(&self) -> bool

Interrupts Enabled

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pub const fn with_i(&self, field_value: bool) -> Self

Interrupts Enabled

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pub fn set_i(&mut self, field_value: bool)

Interrupts Enabled

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pub const fn f(&self) -> bool

Fast Interrupts Enabled

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pub const fn with_f(&self, field_value: bool) -> Self

Fast Interrupts Enabled

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pub fn set_f(&mut self, field_value: bool)

Fast Interrupts Enabled

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pub const fn t(&self) -> bool

Thumb state

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pub const fn with_t(&self, field_value: bool) -> Self

Thumb state

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pub fn set_t(&mut self, field_value: bool)

Thumb state

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pub const fn mode(&self) -> Result<ProcessorMode, u8>

Processor Mode

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pub const fn with_mode(&self, field_value: ProcessorMode) -> Self

Processor Mode

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pub fn set_mode(&mut self, field_value: ProcessorMode)

Processor Mode

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impl Cpsr

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pub fn read() -> Self

Read CPSR (Current Program Status Register)

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pub unsafe fn write(_value: Self)

Write CPSR (Current Program Status Register)

§Safety

Changing the Program Status Register can affect whether interrupts are enabled, whether we are executing Arm or Thumb instructions, or which processor mode are in. You must be absolutely certain that the new CPSR value is valid and appropriate for continued Rust code execution.

You almost certainly want to follow this with an ISB instruction.

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