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diff --git a/openpower/sv/bitmanip/appendix.mdwn b/openpower/sv/bitmanip/appendix.mdwn
index a5f9fcc7ff406cc97aefda1d2bec1c62f3bb082a..806788f150c70cc30738cd50638fd8aee207be78 100644 (file)
--- a/openpower/sv/bitmanip/appendix.mdwn
+++ b/openpower/sv/bitmanip/appendix.mdwn
@@ -133,7 +133,7 @@ Transformation of 4-in, 2-out into a pair of operations:
     RT <- sub[64:127]
     RS <- sub[0:63]
 
-**weirdaddx RT, RA, RB** (RS=RT+VL)
+**weirdaddx RT, RA, RB** (RS=RT+VL for SVP64, RS=RT+1 for scalar)
 
     cat[0:127] = (RB) || (RS)
     sum[0:127] = cat + EXTZ(RA) + [1]*128