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@@ -7,16 +7,33 @@ edit history:
 
 * 25mar2021 first revision
 
+to be sent to:
+
+* OPF Board board@openpowerfoundation.org
+* Tim Ansell blog@mithis.com
+* Toshaan Bharvani
+* James Kulina
+* Mendy
+* cc Alain Williams
+* cc David Calderwood
+* cc Paul Mackerras
+
 # Contents
 
 Dear OPF Board,
 
 As you know the LibreSOC team have been working for over 3 years on a massive conceptual upgrade to the OpenPOWER ISA, based on Cray-Style Vectors, which will modernise it for today's 3D and VPU workloads, with an incidental side-effect of upgrading it for future supercomputing needs.  RISC-V has RVV, ARM has SVE2, x86 has AVX512, whilst OpenPOWER has an out-of-date SIMD ISA. It goes without saying that over the decades, SIMD has been demonstrated to be harmful.
+
 https://www.sigarch.org/simd-instructions-considered-harmful/
 
 Normally, such huge ISA development efforts would be instigated, organised and funded through either Academia or an extremely large Corporation, or a Consortium combining multiple such entities.  It is therefore without precedent across the Computing Industry for something of this magnitude of effort to come not only from a Libre background but from a Libre background that is funded by a Charitable Foundation with a mandate to fund "Works for the Public Good".
 
-From reading the PowerISA v3.0C sections we have learned and taken on board that a "Sandbox" opcode exists (EXT22) which is intended for "small private extensions" to the OpenPOWER ISA.  Our Bitmanipulation Extension, needed for Audio/Video and cryptographic workloads, struggles to fit into that space, and we have not yet added Custom 3D opcodes or the IEEE754 Transcendentals (SIN, COS) 
+From reading the PowerISA v3.0C sections we have learned and taken on board that a "Sandbox" opcode exists (EXT22) which is intended for "small private extensions" to the OpenPOWER ISA.  Our Bitmanipulation Extension alone, needed for Audio/Video and cryptographic workloads, struggles to fit into that space, and we have not yet added Custom 3D opcodes or the IEEE754 Transcendentals (SIN, COS).
+
+http://libre-soc.org/openpower/bitmanip
+
+More than that, these are all "general-purpose" opcodes with uses far beyond LibreSOC's use-case: notwithstanding LibreSOC's use-case itself being by definition general-purpose.  The instructions in the PowerISA v3.0C document therefore *require* us to contact the OpenPOWER Foundation, to initiae the process of including our opcodes, and SVP64, in the OpenPOWER ISA.
+
 
 In speaking with various people (Toshaan, Paul and Hugh) we have pieced together the way that the Op