CMSIS-Core (Cortex-A)  Version 1.2.0
CMSIS-Core support for Cortex-A processor-based devices
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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]cpsrCPSR value to set

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