The Arm architecture includes definitions

An associated debug architecture

Associated trace architectures that define PE Trace Units that implementers can implement with the associated processor hardware

the ARM features

A large uniform register file

not directly on memory contents by using load/store

Simple addressing modes

backwards compatibility

key attributes of ARM architecture

• Implementation size
• performance
• low power consumption

floating-point instruction about ARM

• AArch32 operate 32-bit general-purpose registers and the SIMD and floating-point regsiter(SIMD&FP register)
• AArch64 operate the SIMD and floating-point register and SVE register