The Application Program Status Register (APSR) holds copies of the Arithmetic Logic Unit (ALU) status flags. They are also known as the condition code flags. The processor uses them to determine whether or not to execute conditional instructions.
On ARMv5TE, ARMv6 and later architectures, the APSR also holds the Q (saturation) flag.
On ARMv6 and later, the APSR also holds the GE (Greater than
or Equal) flags. The GE flags can be set by the parallel add and
subtract instructions. The GE flags are used by the
to perform byte-based selection from two registers.
These flags are accessible in all modes, using