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diff --git a/openpower/sv/remap.mdwn b/openpower/sv/remap.mdwn
index 43d66841463f43b8e44b396e2f67d9b38158ce06..3ad5af9045ca7f6276f6afe8dbdd4b092eb2a473 100644 (file)
--- a/openpower/sv/remap.mdwn
+++ b/openpower/sv/remap.mdwn
@@ -234,3 +234,7 @@ With the assumption made by the above code that the column bytes have already be
 The application of the swizzles allows the remapped vec4 a, b and r variables to perform four straight linear 32 bit XOR operations where a scalar processor would be required to perform 16 byte-level individual operations.  Given wide enough SIMD backends in hardware these 3 bit XORs may be done as single-cycle operations across the entire 128 bit Rijndael Matrix.
 
 The other alternative is to simply perform the actual 4x4 GF(256) Matrix Multiply using the MDS Matrix.
+
+# TODO
+
+investigate https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6879380/#!po=19.6429