1. Comparison of AMD64, IA-32e extensions and the Itanium architecture
Matthew Makai
Elizabeth Rommel
Michael Parrill
David Winfield

2. Introduction Advanced Micro Devices AMD64 extensions
Intel IA-32e extensions
Intel Itanium architecture
Comparison of the three
Pay attention to this symbol

3. AMD64 Architecture
AMD64 Architecture extends x86 architecture, which has been the industry standard since 1978, to support 64-bit registers
AMD64 is backwards compatible with 32-bit x86 applications
It achieves this task by running in two modes, Legacy mode and Long mode

4. AMD64 Architecture

5. Intel IA-32e 64-bit extensions
Intel’s response to AMD64
2 main reasons for implementation
Limit of 32-bit memory addressing
Pressure from tier one vendors
Goal of IA-32e: Maintain legacy support while extending the x86 architecture

6. Intel IA-32e 64-bit extensions
IA-32e adds support for:
Maximum memory address of 16 exabytes
New register opcode prefixes
Additional 64-bit registers
64-bit instruction pointer (IP)
New interrupt priority control mechanism

7. Intel Itanium Processor
Original problems with the processor
Not backwards compatible
Remedies
Porting techniques

8. Different Cache Levels

9. AMD 64 Itanium IA-32e fast floating point processing
will use NX bit to stop security breaches
Have the speed to complete enterprise tasks
faster transaction and enterprise application performance
better for cinematic applications
mobile chip
better for database and other high-end enterprise applications
HyperTransport Technology
64 bit memory address
More scalable
integer processing
can work with growing data
on-chip reliability
scalability enablers
allows code for 64-bit processing to access more memory
best for workgroup, workstation, and Web
Always saves the FP state
provide full native 32-bit performance
IA-32e

10. Basic Feature Comparison
Name
GPR
Clock Speed
Bus Speed
Price
IA-32e (Pentium 4) 16
3+ GHz
800+ MHz
<$1000
Itanium
128
1.5 GHz
400 MHz
$5200
AMD64
2+ GHz
1600 MHz
<$800

11. Conclusion
The purpose of a 64-bit architecture is a maximum theoretical memory support of 16 exabytes
AMD64 is backwards compatible by running in two modes: Legacy mode and Long mode
Goal of IA-32e: Maintain legacy support while extending the x86 architecture
One of the original problems with the Itanium processor was its lack of backwards compatibility
The AMD64 can appropriately serve in a workstation or server environment

12. Questions?