From: lkcl <lkcl@web>
Date: Wed, 4 May 2022 00:21:53 +0000 (+0100)
Subject: (no commit message)
X-Git-Tag: opf_rfc_ls005_v1~2490
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=fa2ece9566c3b5432ca91376794f0f4e0497f7cc;p=libreriscv.git

---

diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn
index a1d3de1b2..4d1490878 100644
--- a/openpower/sv/bitmanip.mdwn
+++ b/openpower/sv/bitmanip.mdwn
@@ -486,7 +486,11 @@ based on RV bitmanip.
 
 RA contains a vector of indices to select parts of RB to be
 copied to RT.  The immediate-variant allows up to an 8 bit
-pattern (repeated) to be targetted at different parts of RT
+pattern (repeated) to be targetted at different parts of RT.
+
+xperm shares some similarity with one of the uses of bmator
+in that xperm indices are binary addressing where bitmator
+may be considered to be unary addressing.
 
 ```
 uint_xlen_t xpermi(uint8_t imm8, uint_xlen_t RB, int sz_log2)