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README Updates

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Clifford Wolf 2015-06-07 20:59:20 +02:00
parent 34d9dea8c7
commit 06ba3a1a57
1 changed files with 6 additions and 2 deletions
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@ -26,9 +26,13 @@ For even smaller size it is possible disable support for registers `x16`..`x31`
well as `RDCYCLE[H]`, `RDTIME[H]`, and `RDINSTRET[H]` instructions, turning the
processor into an RV32E core.
Furthermore it is possible to choose between a single-port and a dual-port
register file implementation. The former provides better performance while
the latter results in a smaller core.
*Note: In architectures that implement the register file in dedicated memory
resources, such as many FPGAs, disabling the 16 upper registers may not further
reduce the core size.*
resources, such as many FPGAs, disabling the 16 upper registers and/or
disabling the dual-port register file may not further reduce the core size.*
The core exists in two variations: `picorv32` and `picorv32_axi`. The former
provides a simple native memory interface, that is easy to use in simple