high performance, which is a much cleaner approach that has not
resulted in ISA poisoning such as that suffered by x86 (AVX).
-# Under investigation
-
-* [ETA-10](http://50.204.185.175/collections/catalog/102641713)
- an extremely rare Scalable Vector Architecture from 1986,
- similar to the CDC Cyber 205.
- Only 25 machines were ever delivered. Page 3-220 of its ISA
- shows that it had Predicate Masks and Horizontal Reduction.
- Appendix H-1 shows it is likely a Memory-to-Memory Vector
- Architecture, and overcame the penalties normally associated
- with this by adding an explicit "Vector operand forwarding/chaining"
- instruction (Page 3-69). It is however clearly Scalable, up to Vector
- elements of 2^16.
-
# Actual 3D GPU Architectures and ISAs (all SIMD)
All of these are not Vector ISAs, they are SIMD ISAs.
Mitch on direct contact with him. It is a different approach from the
others, which may be termed "Cray-Style Horizontal-First" Vectorisation.
66000 is a *Vertical-First* Vector ISA.
+* [ETA-10](http://50.204.185.175/collections/catalog/102641713)
+ an extremely rare Scalable Vector Architecture from 1986,
+ similar to the CDC Cyber 205.
+ Only 25 machines were ever delivered. Page 3-220 of its ISA
+ shows that it had Predicate Masks and Horizontal Reduction.
+ Appendix H-1 shows it is likely a Memory-to-Memory Vector
+ Architecture, and overcame the penalties normally associated
+ with this by adding an explicit "Vector operand forwarding/chaining"
+ instruction (Page 3-69). It is however clearly Scalable, up to Vector
+ elements of 2^16.
The term Horizontal or Vertical alludes to the Matrix "Row-First" or
"Column-First" technique, where: