The Unabridged Pentium 4 IA32 Processor Genealogy

The Foundation

Refer to Table 56-1 on page 1322. From a software perspective, the Pentium® 4 processor is the sum of all of the IA32 software architectural features that have been introduced since the 386 processor.

Table 56-1. The Elements of the Software Architecture

Element

Refer to

The instruction set

The IA32 instruction set has grown over the years. A description of the instructions (in order of introduction) can be found in: The 386 instruction set can be found in “Instruction Set Evolution” on page 115 on the CD. The 486 instruction set additions and/or changes are described in “Instruction Set Changes” on page 456. The Pentium® instruction set additions and/or changes are described in “Instruction Set Changes” on page 517. The Pentium® Pro ...