Cortex-A9 Technical Reference Manual: 1.3.1. ARM architecture

The Cortex-A9 processor implements the ARMv7-A architecture profile that includes the following architecture extensions:

Advanced Single Instruction Multiple Data (SIMD) architecture extension for integer and floating-point vector operations
Vector Floating-Point version 3 (VFPv3) architecture extension for floating-point computation that is fully compliant with the IEEE 754 standard
Security Extensions for enhanced security
Multiprocessing Extensions for multiprocessing functionality.

See the ARM Architecture Reference Manual, ARMv7-A and ARMv7-R edition.

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