add comments for SVP64 FP FFT/DCT

diff --git a/openpower/isa/svfparith.mdwn b/openpower/isa/svfparith.mdwn
index 4e457e72b0976ee2c5e001db1c7a39f69f92f603..ea2a4a8d635a0a4eb754b67ee7df436a4a45eb25 100644 (file)
--- a/openpower/isa/svfparith.mdwn
+++ b/openpower/isa/svfparith.mdwn
@@ -1,6 +1,10 @@
 <!-- SVP64 FP Instructions here described are based on -->
 <!--  PowerISA Version 3.0 B Book 1 -->
 
+<!-- FRS in each of these does not need to be explicitly declared -->
+<!-- FRS is automatically calculated by SVP64 to FRT+VL (default elwidth) -->
+<!-- (Vector FRS data sequentially starts immediately after FRT vectors) -->
+
 # Floating Add FFT/DCT [Single]
 
 A-Form