Very Long Instruction Word definition language, architecture
(VLIW) Used to describe a machine code instruction set
implemented using horizontal microcode
. A horizontally encoded instruction word which encodes four or more operations might be considered "very long".
VLIW architectures are sometimes classified as a type of static superscalar
architecture. They are static in the sense that which units operate in parallel is determined by the instruction rather than by dynamic scheduling at run time
Producing code for VLIW machines is difficult; trace scheduling
is a helpful compiler technique.
The most famous VLIW machine was built by (the late) Multiflow Computer, Inc.