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Instruction Descriptions 4–1
Chapter 4
Instruction Descriptions
4.1 Instruction Set Overview
This chapter describes the instructions implemented by the Alpha architecture. The instruction
set is divided into the following sections:
Within each major section, closely related instructions are combined into groups and described
together.
The instruction group description is composed of the following:
• The group name
• The format of each instruction in the group, which includes the name, access type, and
data type of each instruction operand
• The operation of the instruction
• Exceptions specific to the instruction
• The instruction mnemonic and name of each instruction in the group
Instruction Type Section
Integer load and store 4.2
Integer control 4.3
Integer arithmetic 4.4
Logical and shift 4.5
Byte manipulation 4.6
Floating-point load and store 4.7
Floating-point control 4.8
Floating-point branch 4.9
Floating-point operate 4.10
Miscellaneous 4.11
VAX compatibility 4.12
Multimedia (graphics and video) 4.13