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