Table of Contents
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Paragraph
Number
1.1
1.2
1.2.1
1.2.2
1.2.2.1
1.2.2.2
1.2.2.3
1.2.2.4
1.2.2.4.1
1.2.2.4.2
1.2.2.4.3
1.2.2.4.4
1.2.3
1.2.4
1.2.5
1.2.6
1.2.7
1.2.8
1.2.9
1.3
1.4
1.5
1.5.1
1.5.2
Contents
CONTENTS
Title
Page
Number
Audience ............................................................................................................ xxix
Organization ....................................................................................................... xxix
Suggested Reading ............................................................................................... xxx
Conventions ..................................................................................................... xxxiii
Acronyms and Abbreviations .......................................................................... xxxiv
Terminology Conventions .............................................................................. xxxvii
Chapter 1
MPC750 Microprocessor Overview .................................................................... 1-1
MPC750 Microprocessor Features ...................................................................... 1-4
Overview of the MPC750 Microprocessor Features ....................................... 1-4
Instruction Flow ............................................................................................... 1-7
Instruction Queue and Dispatch Unit .......................................................... 1-8
Branch Processing Unit (BPU) .................................................................... 1-8
Completion Unit .......................................................................................... 1-9
Independent Execution Units ..................................................................... 1-10
Integer Units (IUs) ................................................................................. 1-10
Floating-Point Unit (FPU) ..................................................................... 1-10
Load/Store Unit (LSU) .......................................................................... 1-11
System Register Unit (SRU) .................................................................. 1-11
Memory Management Units (MMUs) ........................................................... 1-12
On-Chip Instruction and Data Caches ........................................................... 1-13
L2 Cache Implementation (Not Supported in the MPC740) ......................... 1-14
System InterfacelBus Interface Unit (BIU) ................................................... 1-15
Signals ............................................................................................................ 1-16
Signal Configuration ...................................................................................... 1-17
Clocking ......................................................................................................... 1-19
MPC750 Microprocessor: Implementation ........................................................ 1-19
PowerPC Registers and Programming Model ................................................... 1-21
Instruction Set .................................................................................................... 1-26
PowerPC Instruction Set ................................................................................ 1-27
MPC750 Microprocessor Instruction Set ...................................................... 1-28
iii
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