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Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles
book

Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles

by James S. Evans - Lawrence University, Gregory L. Trimper - viika
April 2003
Intermediate to advanced content levelIntermediate to advanced
576 pages
15h 13m
English
Pearson
Content preview from Itanium® Architecture for Programmers: Understanding 64-Bit Processors and EPIC Principles

2.5. Itanium Information Units and Data Types

The basic information unit for the Itanium architecture is the 8-bit byte. Individual bytes are given 64-bit addresses, but it is also important to understand that groups of adjacent bytes have addresses, as shown in Figure 2-5. These multibyte units include the 16-bit word (2 bytes), the 32-bit double word (4 bytes), and the 64-bit quad word (8 bytes). For little-endian systems, such units are addressed by the low-order byte of the group. Similarly, the addresses of the higher-order bytes within the larger information units take on successive values beyond the address of the lowest-order byte.

Figure 2-5. Itanium information units

In the convention that has been used by Intel and Digital Equipment ...

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Publisher Resources

ISBN: 0131013726Purchase book