From: lkcl <lkcl@web>
Date: Sun, 16 Apr 2023 13:14:55 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls009_v1~7
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d6a874d26d79ccb2ea159409ec3f932961591b32;p=libreriscv.git

---

diff --git a/openpower/sv/remap.mdwn b/openpower/sv/remap.mdwn
index 2b0db1be9..969f6409a 100644
--- a/openpower/sv/remap.mdwn
+++ b/openpower/sv/remap.mdwn
@@ -452,6 +452,10 @@ which will turn the Schedule around such that issuing of the Scalar
 Defined Words is done with SUBVL looping as the inner loop not the
 outer loop. Rc=1 with Sub-Vectors (SUBVL=2,3,4) is `UNDEFINED` behaviour.
 
+*Programmer's Note: Overwrite Parallel Reduction with Sub-Vectors
+will clearly result in data corruption.  It may be best to perform
+a Pack/Unpack Transposing copy of the data first*
+
 ## Determining Register Hazards
 
 For high-performance (Multi-Issue, Out-of-Order) systems it is critical