From: lkcl <lkcl@web>
Date: Tue, 14 Sep 2021 13:46:47 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: DRAFT_SVP64_0_1~144
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=0938a8e8cb1cd2d4340fd9b07d88fe0aed3001e2;p=libreriscv.git

---

diff --git a/openpower/sv/branches.mdwn b/openpower/sv/branches.mdwn
index ce659db0c..00fb4d26f 100644
--- a/openpower/sv/branches.mdwn
+++ b/openpower/sv/branches.mdwn
@@ -272,6 +272,11 @@ In short, Vectorised Branch becomes an extremely powerful tool.
 
 ## CTR-test
 
+Where a standard Scalar v3.0B branch unconditionally decrements
+CTR when `BO[2]` is clear, CTR-test Mode introduces more flexibility
+which allows CTR to be used for many more types of Vector loops
+constructs.
+
 CTR-test mode and CTi interaction is as follows: note that
 `BO[2]` is still required to be clear for CTR decrements to be
 considered, exactly as is the case in Scalar Power ISA v3.0B