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diff --git a/openpower/sv/rfc/ls012.mdwn b/openpower/sv/rfc/ls012.mdwn
index 40974a978c01452c51478483809bf2fce39cfd98..75ab7089dd6baf4f65881620a75469c622cab368 100644 (file)
--- a/openpower/sv/rfc/ls012.mdwn
+++ b/openpower/sv/rfc/ls012.mdwn
@@ -273,6 +273,10 @@ ISA! For desktop as well as Server HTML/JS back-end execution of
 javascript this becomes an obvious priority, recognised already by ARM
 as just one example.
 
+Whilst some of these instructions have VSX equivalents they must not
+be excluded on that basis.  SVP64/VSX may have a different meaning from
+SVP64/SFFS i e. the two *Vectorised* instructions may not be equivalent.
+
 ## Bitmanip LUT2/3
 
 These LUT2/3 operations are high cost high reward. Outlined in