| commit | 9337f21c8e0ea943b5f476d34a2cab14c362ab53 | [log] [tgz] |
|---|---|---|
| author | Rupert Swarbrick <rswarbrick@lowrisc.org> | Mon Jul 13 17:48:53 2020 +0100 |
| committer | Rupert Swarbrick <rswarbrick@gmail.com> | Fri Jul 17 16:38:57 2020 +0100 |
| tree | 51fb02518d599321458df8a90c9901b4e5905a55 | |
| parent | c6bac1049be96a8db8bc017af11644f7df846947 [diff] |
[otbn] Properly parse optional operands for an instruction
This shouldn't have any impact on generated documentation, but the
YAML parser now actually understands what syntax like this means:
<op0>[, <op1>][, X<op2>]
It should match any of:
r0
r0, r1
r0, Xr2
r0, r1, Xr2
We don't support nesting brackets (so there are always 2^k possible
syntaxes for some k). We also don't check for ambiguity, so the
ambiguous:
<op0>[, <op1>][, <op2>]
is accepted. In practice, we're going to parse assembly syntax with a
regex, at least at first, which means the argument will be assigned to
op1. But probably don't do that: it's rather confusing!
Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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