From: lkcl <lkcl@web>
Date: Tue, 24 May 2022 14:25:21 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~2127
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b277ac791ad36f91aef1ada06f240c4bcb9b438b;p=libreriscv.git

---

diff --git a/openpower/sv/vector_ops.mdwn b/openpower/sv/vector_ops.mdwn
index d92de32fa..62e988cf5 100644
--- a/openpower/sv/vector_ops.mdwn
+++ b/openpower/sv/vector_ops.mdwn
@@ -65,6 +65,10 @@ result.
         or result, result, t1
         srr r3, r3, 1 # shift r3 predicate up by one
 
+To investigate:
+
+* <https://stackoverflow.com/questions/39266476/how-to-speed-up-this-histogram-of-lut-lookups>
+
 ## iota
 
 Based on RVV vmiota.  vmiota may be viewed as a cumulative variant of popcount, generating multiple results.  successive iterations include more and more bits of the bitstream being tested.