Commit Graph

7 Commits (cff4b13a9b8d0036f9441c150bfd8e1d7bc620e3)

Author SHA1 Message Date
Tristan Gingold 0169d48ee6 Fix register file size (there are 32 gprs). 4 years ago
Benjamin Herrenschmidt ec1868f7d2 register_file: Move GPRs into distributed RAM
The register file is currently implemented as a whole pile of individual
1-bit registers instead of LUT memory which is a huge waste of FPGA
space.

This is caused by the output signal exposing the register file to the
outside world for simulation debug.

This removes that output, and moves the dumping of the register file
to the register file module itself. This saves about 8% of fpga on
the little Arty A7-35T.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
4 years ago
Anton Blanchard 4d9b2a1165 Reformat register file
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
4 years ago
Anton Blanchard 79a14c8e37 Add forwarding in the register file
We need this for the upcoming pipelining patches.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 31a6fb6ef5 More second write port removal
I missed the register file updates for the second write port
removal.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 04eb9583e6 Clean up register read debug output
Right now we continually print all 3 possible GPRs an instruction
may be using. Add signals so we only print GPRs when they are
actually read. This should hopefully optimise away when synthesized.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago
Anton Blanchard 5a29cb4699 Initial import of microwatt
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
5 years ago