From: lkcl <lkcl@web>
Date: Sun, 5 Jun 2022 19:28:34 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~1937
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=2b0bb159b5fcf2c17d7e3901307f68b56d87094c;p=libreriscv.git

---

diff --git a/openpower/sv/vector_ops.mdwn b/openpower/sv/vector_ops.mdwn
index 2a61fb58b..5720c3d9a 100644
--- a/openpower/sv/vector_ops.mdwn
+++ b/openpower/sv/vector_ops.mdwn
@@ -25,6 +25,11 @@ Links:
 
 # Vector
 
+Both of these instructions may be synthesised from SVP64 Vector
+instructions.  conflictd is an O(N^2) instruction based on
+`sv.cmpi` and iota is an O(N) instruction based on `sv.addi`
+with the appropriate predication 
+
 ## conflictd
 
 This is based on the AVX512 conflict detection instruction.  Internally the logic is used to detect address conflicts in multi-issue LD/ST operations.  Two arrays of values are given: the indices are compared and duplicates reported in a triangular fashion.  the instruction may be used for histograms (computed in parallel)