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The Intel Model-Specific Registers (MSRs) are described in-depth in the Intel® 64 and IA-32 Architectures Software Developer’s Manual, Volume 4; the link to the Intel reference manuals (PDFs) download page (which includes Vol 4):
IA-64 (Intel Itanium architecture) is the instruction set architecture (ISA) of the discontinued Itanium family of 64-bit Intel microprocessors. The basic ISA specification originated at Hewlett-Packard (HP), and was subsequently implemented by Intel in collaboration with HP. The first Itanium processor, codenamed Merced, was released in 2001.
Intel's second generation of 32-bit x86 processors, introduced built-in floating point unit (FPU), 8 KB on-chip L1 cache, and pipelining. Faster per MHz than the 386. Small number of new instructions. P5 original Pentium microprocessors, first x86 processor with super-scalar architecture and branch prediction. P6
An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.
Intel Atom Oak Trail 2-way simultaneous multithreading, in-order, burst mode, 512 KB L2 cache Intel Atom Bonnell: 2008 SMT Intel Atom Silvermont: 2013 Out-of-order execution Intel Atom Goldmont: 2016 Multi-core, out-of-order execution, 3-wide superscalar pipeline, L2 cache Intel Atom Goldmont Plus: 2017 Multi-core Intel Atom Tremont: 2019
SSSE3 contains 16 new discrete instructions. Each instruction can act on 64-bit MMX or 128-bit XMM registers. Therefore, Intel's materials refer to 32 new instructions. They include: [1] Twelve instructions that perform horizontal addition or subtraction operations. Six instructions that evaluate absolute values.
Pentium II processor with MMX technology. MMX defines eight processor registers, named MM0 through MM7, and operations that operate on them.Each register is 64 bits wide and can be used to hold either 64-bit integers, or multiple smaller integers in a "packed" format: one instruction can then be applied to two 32-bit integers, four 16-bit integers, or eight 8-bit integers at once.
Intel® Architecture Software Developer's Manual, Volume 3: System Programming Guide Archived 2009-02-16 at the Wayback Machine. Intel 64 and IA-32 Architectures Software Developer’s Manual, Volume 3A:System Programming Guide, Part 1 (see CHAPTER 6, INTERRUPT AND EXCEPTION HANDLING and CHAPTER 10, ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER)]