Basic Format: Parabolium ABCD [S]
A, B, C, and D can be any one of the hex digits 0~F. Their respective meanings are explained in the following.
Optional suffix S may exist.
A means the major generation of design. In general, the larger the better.
Some values:
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1: simple 32-bit multi-cycle or small pipeline processors, with basic peripheral support; limited interrupt support; single hart; smaller energy cost.
suited for IoT systems and learning purposes; no higher privilege levels; no address transformation.
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2 (draft): in-order 32/64-bit pipeline processors, with a higher performance, full privilege level, and address transformation support; SMP.
able to boot some modern kernels such as Linux. I hope it will be able to boot some non-trivial Linux distributions.
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3 (draft): out-of-order, multiple-issue, superscalar 32/64-bit processors; higher-performance; SMP; NUMA.
hope to run larger OSs more smoothly.
B means a sub-generation of design inside the same major generation.
When major generations are the same, in general, the larger the better.
C distinguishes different design instances. Different C usually means different micro-architectures or different backends.
Under the same major design, different D means small differences in design or small improvements, but the micro-architecture and backend are the same.
TODO
When one of the four numbers >= 16, we use more hex digits and split the digits with underscores.
Example: in Parabolium 34_13_7 A=3, B=4, C=0x13, D=7