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1.5.1 PowerPC Instruction Set
The PowerPC instructions are divided into the following categories:
Integer instructions-These include computational and logical instructions.
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Integer arithmetic instructions
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Integer compare instructions
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Integer logical instructions
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Integer rotate and shift instructions
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Floating-point instructions--These include floating-point computational
instructions, as well as instructions that affect the FPSCR.
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Floating-point arithmetic instructions
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Floating-point multiply/add instructions
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Floating-point rounding and conversion instructions
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Floating-point compare instructions
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Floating-point status and control instructions
Load/store instructions-These include integer and floating-point load and store
instructions.
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Integer load and store instructions
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Integer load and store multiple instructions
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Floating-point load and store
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Primitives used to construct atomic memory operations (lwarx and stwcx.
instructions)
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Flow control instructions-These include branching instructions, condition register
logical instructions, trap instructions, and other instructions that affect the
instruction flow.
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Branch and trap instructions
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Condition register logical instructions
Processor control instructions-These instructions are used for synchronizing
memory accesses and management of caches, TLBs, and the segment registers.
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Move to/from SPR instructions
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Move to/from MSR
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Synchronize
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Instruction synchronize
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Order loads and stores
Chapter 1. Overview
1-27
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