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diff --git a/openpower/sv/bitmanip.mdwn b/openpower/sv/bitmanip.mdwn
index a1d3de1b2419d39360e6ffff816f7fab3eb6c53c..4d1490878d296ec8ffdd81d07113ed2c585e659c 100644 (file)
--- 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)