(no commit message)

diff --git a/openpower/sv/svp_rewrite/svp64.mdwn b/openpower/sv/svp_rewrite/svp64.mdwn
index f36d6fb4cc81de256efd913fc0ca6b400a2b0045..775eae2ce8492f2296948de519cb7e3946083212 100644 (file)
--- a/openpower/sv/svp_rewrite/svp64.mdwn
+++ b/openpower/sv/svp_rewrite/svp64.mdwn
@@ -12,6 +12,8 @@ counting up as you move to the LSB end). All bit ranges are inclusive (so
 
 64-bit instructions are split into two 32-bit words, the prefix and the suffix. The prefix always comes before the suffix in PC order.
 
+SVP64 is designed so that when the prefix is all zeros, no effect or influence occurs (no augmentation) such that all standard OpenPOWER v3.B instructions may be active at that time, in full. The corollary is that when the SV prefix is nonzero, alternative meanings may be given to all and any instructions.
+
 ## Definition of Reserved in this spec.
 
 For the new fields added in SVP64, instructions that have any of their fields set to a reserved value must cause an illegal instruction trap, to allow emulation of future instruction sets.