# Simple-V Architectural Resources
* No new Interrupt types are required.
-* No modifications to existing Power ISA opcodes are required either.
-* No new Register Files are required (because Simple-V is a category of
- Zero-Overhead Looping on top of existing instructions and
- existing registers, not an actual Vector ISA)
+ No modifications to existing Power ISA opcodes are required.
+ No new Register Files are required (all because Simple-V is a category of
+ Zero-Overhead Looping on Scalar instructions)
* GPR FPR and CR Field Register extend to 128. A future
version may extend to 256 or beyond[^extend] or also extend VSX[^futurevsx]
* 24-bits are needed within the main SVP64 Prefix (equivalent to a 2-bit XO)