From: lkcl <lkcl@web>
Date: Sat, 2 Apr 2022 10:21:05 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~2938
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=76fae097dba8c5369db08ccea293b1bad0c970db;p=libreriscv.git

---

diff --git a/openpower/sv/branches.mdwn b/openpower/sv/branches.mdwn
index f134505be..fb9aaf36d 100644
--- a/openpower/sv/branches.mdwn
+++ b/openpower/sv/branches.mdwn
@@ -181,6 +181,10 @@ Brief description of fields:
   tested. CTR inversion decrements if a test *fails*. Only relevant
   in CTR-test Mode.
 
+LRu and CTR-test modes are where SVP64 Branches subtly differ from
+Scalar v3.0B Branches. `bclr` for example will always update LR, whereas
+`sv.bclr/lru` will only update LR if the branch succeeds.
+
 # Vectorised CR Field numbering, and Scalar behaviour
 
 It is important to keep in mind that just like all SVP64 instructions,