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diff --git a/openpower/sv/biginteger.mdwn b/openpower/sv/biginteger.mdwn
index 9017b8cd1ca6e9cde54b11110caf155c7966b7bd..d88c2b1323b8b123b204ec78e60e7eb6f6434c30 100644 (file)
--- a/openpower/sv/biginteger.mdwn
+++ b/openpower/sv/biginteger.mdwn
@@ -11,3 +11,12 @@ A reminder that a particular focus of SVP64 is that it is built on
 top of Scalar operations, where those scalar operations are useful in
 their own right without SVP64. Thus the operstions here are proposed
 first as Scalar Extensions to the Power ISA.
+
+A secondary focus is that if Vectorised, implementors may choose
+to deploy macro-op fusion targetting back-end 256-bit or greater
+Dynamic SIMD ALUs for maximum performance and effectiveness.
+
+# Add and Subtract
+
+Surprisingly, no new additional instructions are required to perform
+a straightforward big-integer add or subtract.  Vectorised `addex`