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Floating-point is an optional extension to the Arm® architecture. There are versions that provide additional instructions.
The floating-point instruction set supported in A32 is based on VFPv4, but with the addition of some new instructions, including the following:
In AArch32 state, the register bank consists of thirty-two 64-bit registers, and smaller registers are packed into larger ones, as in Armv7 and earlier.
In AArch64 state, the register bank includes thirty-two 128-bit registers and has a new register packing model.
Floating point instructions in A64 are closely based on VFPv4 and A32, but with new instruction mnemonics and some functional enhancements.