Current Program Status Register (CPSR)

The Current Program Status Register (CPSR) holds processor status and control information. More...

Content
	CPSR Bits
	Bit position and mask macros.
	CPSR M field values
	Valid values for CPSR M field.

Data Structures
struct	CPSR_Type
	Bit field declaration for CPSR layout. More...

Functions
__STATIC_INLINE uint32_t	__get_CPSR (void)
	Get CPSR (Current Program Status Register) More...
__STATIC_INLINE void	__set_CPSR (uint32_t cpsr)
	Set CPSR (Current Program Status Register) More...

Description

The individual register bits have the following meaning:

Bits	Name	Function
[31]	N	Negative condition code flag
[30]	Z	Zero condition code flag
[29]	C	Carry condition code flag
[28]	V	Overflow condition code flag
[27]	Q	Cumulative saturation bit
[26:25]	IT[1:0]	If-Then execution state bits for the Thumb IT (If-Then) instruction
[24]	J	Jazelle bit
[19:16]	GE	Greater than or Equal flags
[15:10]	IT[7:2]	If-Then execution state bits for the Thumb IT (If-Then) instruction
[9]	E	Endianness execution state bit: 0 - Little-endian, 1 - Big-endian
[8]	A	Asynchronous abort mask bit
[7]	I	IRQ mask bit
[6]	F	FIRQ mask bit
[5]	T	Thumb execution state bit
[4:0]	M	Mode field

Consider using __get_CPSR and __set_CPSR for accessing this register.

Function Documentation

__STATIC_INLINE uint32_t __get_CPSR

(

void

)

Returns

CPSR Register value

This function returns the content of the Current Program Status Register (CPSR).

__STATIC_INLINE void __set_CPSR

(

uint32_t

cpsr

)

Parameters

[in]

cpsr

CPSR value to set

This function assigns the given value to the Current Program Status Register (CPSR).