Chapter 16AppendixExtension Instruction Specification XVI - 39■ Extension InstructionsDescription of symbolsSymbols used for description of extension instructions are listed below...Refer to “@ Addressing Modes” for more information on indirect addressing...OP : Instruction operationAm, An : Address register (m, n=3 to 0)Dm, Dn : Data register (m, n=3 to 0 )SP : Stack pointerimm : Immediate (used in a general sense)imm8 : 8-bit immediateimm16 : 16-bit immediateimm32 : 32-bit immediated8 : 8-bit displacementd16 : 16-bit displacementd32 : 32-bit displacementabs16 : 16-bit absoluteabs32 : 32-bit absoluteMDR : Multiply-divide register (built into core)MDRQ : High-speed multiply register (built into extension arith-metic unit)MCRL : Multiply and accumulate register (built into extensionarithmetic unit)MCRH : Multiply and accumulate register (built into extensionarithmetic unit)MCVF : Multiply and accumulate flag (built into extension arith-metic unit)LIR : Loop instruction registerLAR : Loop address registerPSW : Processor status wordPC : Program counter( ) : Indirect addressingregs : Multiple registers specification0x.... : Hexadecimal number (number following “0x” representshexadecimal number)
