EPIC (Explicitly Parallel Instruction Computing)
(EPIC also stand for Electronic Privacy Information Center.)
EPIC (Explicitly Parallel Instruction Computing) is a 64-bit microprocessor instruction set,
jointly defined and designed by Hewlett Packard and Intel, that provides up to 128 general and floating point
unit registers
and uses speculative loading, predication, and explicit parallelism to
accomplish its computing tasks. By comparison, current 32-bit CISC
and RISC
microprocessor architectures depend on 32-bit registers, branch prediction, memory latency, and
implicit parallelism, which are considered a less efficient approach in microarchitecture
design.
IA-64 (Intel Architecture-64), Intel's first 64-bit CPU microarchitecture, is based on EPIC.
Intel's first implementation, long expected and well-known as Merced (its code name), was
christened with the Itanium brand name in
October, 1999. It is expected that Itanium-based systems will be compatible with versions of
existing and future operating systems including HP-UX, 64-bit Windows, IA-64 Linux, Project
Monterey, and Novell Modesto.
This was last updated in January 2006
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