| commit | 74d2e299afc3d557c179c2350616d313aa828462 | [log] [tgz] |
|---|---|---|
| author | Rupert Swarbrick <rswarbrick@lowrisc.org> | Fri Jan 08 15:20:09 2021 +0000 |
| committer | Rupert Swarbrick <rswarbrick@gmail.com> | Wed Jan 20 14:37:09 2021 +0000 |
| tree | 4969a4f3acd4b495e6548d6a10beef388aaac31b | |
| parent | dce30cf724cc53b6d5378241b201a338ab904481 [diff] |
[otbn] Auto-generate decode information in ISA
Remove the (slightly bit-rotted) manual decode information and
automatically generate the relevant information in the operand tables.
The results look like
ADD's grd operand:
unsigned(GRD)
ANDI's imm operand:
signed(IMM)
SW's offset operand:
signed({OFFSET_1, OFFSET_0})
BEQ's offset operand:
PC + signed({OFFSET_3, OFFSET_2, OFFSET_1, OFFSET_0, 1'b0})
LOOP's bodysize operand:
unsigned(BODYSIZE) + 1
The big YAML changes are removing the decode blocks and renaming the
variables in the "operation" pseudo-code to match the operand names.
Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>
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