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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 well as `RDCYCLE[H]`, `RDTIME[H]`, and `RDINSTRET[H]` instructions, turning the
processor into an RV32E core. 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 *Note: In architectures that implement the register file in dedicated memory
resources, such as many FPGAs, disabling the 16 upper registers may not further resources, such as many FPGAs, disabling the 16 upper registers and/or
reduce the core size.* 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 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 provides a simple native memory interface, that is easy to use in simple