INTEL 64 AND IA 32 ARCHITECTURES SOFTWARE DEVELOPERS MANUAL
IA-32 - Wikipedia
IA-32 (short for "Intel Architecture, 32-bit", sometimes also called i386) is the 32-bit version of the x86 instruction set architecture, designed by Intel and first implemented in the 80386 microprocessor in 1985. IA-32 is the first incarnation of x86 that supports 32-bit computing; as a result, the "IA-32" term may be used as a metonym to refer to all x86 versions that support 32-bit computing.
IA-64 - Wikipedia
IA-64 (also called Intel Itanium architecture) is the instruction set architecture (ISA) of the Itanium family of 64-bit Intel microprocessors basic ISA specification originated at Hewlett-Packard (HP), and was evolved and then implemented in a new processor microarchitecture by Intel with HP's continued partnership and expertise on the underlying EPIC design concepts.
Resource & Design Center for Development with Intel
Technical Library Find the technical documentation, software, tools, and support you need to design and build with Intel® products.[PDF]
Intel(R) 64 Architecture x2APIC Specification
2-1 LOCAL X2APIC ARCHITECTURE CHAPTER 2 LOCAL X2APIC ARCHITECTURE 2.1 X2APIC ENHANCEMENTS The key enhancements provided by the x2 APIC architecture over xAPIC are the following: • Support for two modes of operation to pr ovide backward compatibility and exten- sibility for future platform innovations:
Itanium-Architektur – Wikipedia
Translate this pageItanium ist eine 64‑Bit-Architektur mit EPIC-Befehlssatz, die gemeinsam von Hewlett-Packard und Intel für den gleichnamigen Itanium-Prozessor (Codename Merced) entwickelt wurde. Ende der 1990er Jahre wurde die Befehlssatzarchitektur auch unter der Bezeichnung englisch Intel Architecture 64‑Bit, kurz IA-64, eingeführt, weil sie die damals 32‑Bit-x86-Architektur IA‑32 vollständig
history - Why does x86 represent 32bit when x64 represents
Probably because the x86 line became synonymous with 32 bit processors for quite some time, while x64 was specifically a designation for 64 bit as applications and operating systems were transitioned over, and now there are software applications that require the 64 bit designation in order to run (like some VM software).
Intel® MPI Library for Linux* OS Installation Guide
Setting up the environment. Add the following PATH and/or LD_LIBRARY_PATH settings to your c or rc files so that the settings are visible on all nodes in your cluster: