Introduction to ARM

Architecture 7

v7A, v7R
Dynamic Compiler Support.
Execution Environment (Thumb-2EE).
VFP v3 (Vector Floating Point).
NEON advanced SIMD.
Thumb-2 mandated.
v7M
Minimalist variant for embedded uses.
Thumb-2 only.

Remarks

Only the newest tools currently target v7. e.g. CodeSourcery’s GCC ARM toolchain (external link).

NEON technology (external link) is a 64/128-bit hybrid SIMD architecture developed by ARM to accelerate the performance of multimedia and signal processing applications [...].
The NEON architecture provides at least 3x the performance of ARMv5 and 2x the performance of ARMv6 SIMD on a range of media and DSP applications.

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