35.2.1.8. УСЛОВНЫЕ ПЕРЕСЫЛКИ И УСТАНОВКИ

  
  Conditional Move 
 
  


	if (Condition)
	{
		Destination = Source
	}


Условное присваивание - очень мощная команда, которая минимизирует число
ветвлений в программах.

  



 -------------------------------------------------------------------------------
o	Conditional MOVE

	x86	CMOVxx		RR	RI?
	---------------------------------------
	Alpha	CMOVEQ	64	RRR	RRI
		CMOVGE	64	RRR	RRI	
		CMOVGT	64	RRR	RRI
		CMOVLBC	64	RRR	RRI
		CMOVLBS	64	RRR	RRI
		CMOVLE	64	RRR	RRI
		CMOVLT	64	RRR	RRI
		CMOVNE	64	RRR	RRI
	----------------------------------------
	PPC
	----------------------------------------
	MIPS	MOVN	32/64	RRR			(!=0)
		MOVZ	32/64	RRR			(=0)
	----------------------------------------
	SPARC	MOVA	max	RRR	RRI
		MOVN	max	RRR	RRI
		MOVNE	max	RRR	RRI
		MOVE	max	RRR	RRI
		MOVG	max	RRR	RRI
		MOVGE	max	RRR	RRI
		MOVLE	max	RRR	RRI
		MOVL	max	RRR	RRI
		MOVGU	max	RRR	RRI
		MOVLEU	max	RRR	RRI
		MOVPOS	max	RRR	RRI
		MOVNEG	max	RRR	RRI
		MOVVC	max	RRR	RRI
		MOVVS	max	RRR	RRI
	-----------------------------------------		


				V9
	----------------------------------------
	68K
	----------------------------------------
	z80	
	----------------------------------------
	ARM	MOVcc	32	RR
				RI



  
  Conditional Set 
 

  



 -------------------------------------------------------------------------------
o	Conditional SET

	x86	SETxx		R
	----------------------------------------
	Alpha
	----------------------------------------
	PPC
	----------------------------------------
	MIPS	STL		RRR			(set if Less:Signed)
		STLI		RRI			(Signed Immediate)
		SLTIU		RRI			(Unsigned)
		SLTU		RRR				
	----------------------------------------
	SPARC	(*) via conditional moves
	----------------------------------------
	68K	Sxx		R			(A-,D- regs)
	----------------------------------------
	z80	
 -------------------------------------------------------------------------------