Commit Graph

4 Commits (cff4b13a9b8d0036f9441c150bfd8e1d7bc620e3)

Author SHA1 Message Date
Anton Blanchard 813f834012 Add CR hazard detection
To keep things simple we treat the CR as a single entity.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
4 years ago
Anton Blanchard bb65d0b899 Remove issue restrictions on a number of instructions
Anything that isn't a load or store and anything that doesn't read the
CR can go as soon as its inputs are ready.

While we could also allow SPR read/write and carry read/write, we plan
to change them to be read in decode2 and written in writeback soon and
they will need separate hazard detection to be added.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
4 years ago
Anton Blanchard bdc26b7527 Add GPR hazard detection
Check GPRs against any writers in the pipeline.

All instructions are still marked single in pipeline at
this stage.

Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
4 years ago
Anton Blanchard d5346d0abf Separate issue control into its own unit
Signed-off-by: Anton Blanchard <anton@linux.ibm.com>
4 years ago