Instruction Set And Addressing Modes; Powerpc Instruction Set And Addressing Modes - Freescale Semiconductor MPC8313E Family Reference Manual

e300 Processor Core Overview
7.3.2

Instruction Set and Addressing Modes

The following sections describe the PowerPC instruction set and addressing modes in general.
7.3.2.1

PowerPC Instruction Set and Addressing Modes

All PowerPC instructions are encoded as single-word (32-bit) opcodes. Instruction formats are consistent
among all instruction types, permitting efficient decoding to occur in parallel with operand accesses. This
fixed instruction length and consistent format simplifies instruction pipelining.
The PowerPC instructions are divided into the following categories:
• Integer instructions—These include computational and logical instructions.
— Integer arithmetic instructions
— Integer compare instructions
— Integer logical instructions
— Integer rotate and shift instructions
• Floating-point instructions—These include floating-point computational instructions, as well as
instructions that affect the FPSCR.
— Floating-point arithmetic instructions
— Floating-point multiply/add instructions
— Floating-point rounding and conversion instructions
— Floating-point compare instructions
— Floating-point status and control instructions
• Load/store instructions—These include integer and floating-point load and store instructions.
— Integer load and store instructions
— Integer load and store multiple instructions
— Floating-point load and store
— Primitives used to construct atomic memory operations (lwarx and stwcx. instructions)
• Flow control instructions—These include branching instructions, condition register logical
instructions, trap instructions, and other instructions that affect the instruction flow.
— Branch and trap instructions
— Condition register logical instructions
• Processor control instructions—These instructions are used for synchronizing memory accesses
and management of caches, TLBs, and the segment registers.
— Move to/from SPR instructions
— Move to/from MSR
— Move to/from PMR
— Synchronize
— Instruction synchronize
MPC8313E PowerQUICC II Pro Integrated Processor Family Reference Manual, Rev. 3
7-26 Freescale Semiconductor