UM0434 datasheet(21/390 Pages) STMICROELECTRONICS

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UM0434

Conventions

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Conventions

This document uses the following notational conventions:

2.1

Terminology conventions

Table 1 lists certain terms used in this manual that differ from the architecture terminology

conventions.

cleared/set

When a bit takes the value zero, it is said to be cleared; when it takes a value of one, it

is said to be set.

mnemonics

Instruction mnemonics are shown in lowercase bold.

italics

Italics indicate variable command parameters, for example, bcctr

Book titles in text are set in italics.

Internal signals are set in italics, for example,

qual BG.

0x0

Prefix to denote hexadecimal number

0b0

Prefix to denote binary number

rA, rB

Instruction syntax used to identify a source GPR

Instruction syntax used to identify a destination GPR

REG[FIELD]

Abbreviations for registers are shown in uppercase text. Specific bits, fields, or ranges

appear in brackets. For example, MSR[LE] refers to the little-endian mode enable bit

in the machine state register.

In some contexts, such as signal encodings, an unitalicized x indicates a don’t care.

An italicized

x indicates an alphanumeric variable.

An italicized

n indicates a numeric variable.

NOT logical operator

AND logical operator

OR logical operator

Table 1.

Terminology conventions

Architecture specification

This manual

Change bit

Changed bit

Extended mnemonics

Simplified mnemonics

Out of order memory accesses

Speculative memory accesses

Privileged mode (or privileged state)

Supervisor level

Problem mode (or problem state)

User level

Reference bit

Referenced bit

Relocation

Translation

Storage (locations)

Memory

Storage (the act of)

Access

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