| commit | 73f4ec619a8f1e9843adb67d65cb13e488b3de23 | [log] [tgz] |
|---|---|---|
| author | Philipp Wagner <phw@lowrisc.org> | Thu Sep 03 14:05:14 2020 +0100 |
| committer | Philipp Wagner <mail@philipp-wagner.com> | Sat Sep 05 18:04:39 2020 +0200 |
| tree | f855dd51f8c2696034e80457cfa2b548ab8d2ca2 | |
| parent | 36dfba28ea045134815f481b1d292d743fdbb1d9 [diff] |
[otbn] Better specify "result" when setting flags The L, M and Z flags operate on the "result" of an operation. Clarify that this means only the "lower" 256 bits as they are written back to the destination register, not the overflow bit (which is present in the carry flag). Fixes #3336 (See also this issue for a long reason by Felix Miller why this is the correct behavior.) Signed-off-by: Philipp Wagner <phw@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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