35.3.1.2. INTEGER ARITHMETICAL ON ALPHA

Alpha Operate Format
+-------------------------+------------------------+
| 31..26	Opcode	  | 31..26	Opcode	   |
| 25..21	Ra	  | 25..21	Ra	   |
| 20..16	Rb	  | 20..13	LIT        |
| 15..13	SBZ	  | 12		1          |
| 12		0	  | 11..5	Function   |	
| 11..5		Function  | 4..0	Rc         |
| 4..0		Rc        |                        |
+-------------------------+------------------------+


Longword Add
	ADDL	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	ADDL	Ra.rq,#b.ib,Rc.wq	!Operate Format

	Rc <- SEXT( (Rav + Rbv)<31:0>)

	/V	Integer Overflow Enable


Quadword Add
	ADDQ	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	ADDQ	Ra.rq,#b.ib,Rc.wq	!Operate Format

	Rc <- Rav + Rbv

	/V	Integer Overflow Enable



	ADDL	10.00
	ADDL/V	10.40
	ADDQ	10.20
	ADDQ/V	10.60

	// -----------------------------------------------------------------


Longword Subtract
	SUBL	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	SUBL	Ra.rq,#b.ib,Rc.wq	!Operate Format

	Rc <- SEXT((Rav - Rbv)<31:0>)

	/V	Integer Overflow Enable



Quadword Subtract
	SUBQ	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	SUBQ	Ra.rq,#b.ib,Rc.wq	!Operate Format

	Rc <- Rav - Rbv

	/V	Integer Overflow Enable

	
	SUBL	10.09
	SUBL/V	10.49
	SUBQ	10.29
	SUBQ/V	10.69

	// -----------------------------------------------------------------



Scaled Longword Add
	S4ADDL	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S4ADDL	Ra.rq,#b.ib,Rc.wq	!Operate Format
	S8ADDL	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S8ADDL	Ra.rq,#b.ib,Rc.wq	!Operate Format

	S4ADDL:
	Rc  <- SEXT (Rav * 4 + Rbv)<31:0>)
	
	S8ADDL:
	Rc  <- SEXT( (Rav * 8 + Rbv)<31:0>)



Scaled Longword Subtract
	S4SUBL	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S4SUBL	Ra.rq,#b.ib,Rc.wq	!Operate Format
	S8SUBL	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S8SUBL	Ra.rq,#b.ib,Rc.wq	!Operate Format

	S4SUBL:
	Rc  <- SEXT (Rav * 4 - Rbv)<31:0>)
	
	S8SUBL:
	Rc  <- SEXT( (Rav * 8 - Rbv)<31:0>)



Scaled Quadword Add
	S4ADDQ	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S4ADDQ	Ra.rq,#b.ib,Rc.wq	!Operate Format
	S8ADDQ	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S8ADDQ	Ra.rq,#b.ib,Rc.wq	!Operate Format

	S4ADDQ:
	Rc  <- Rav * 4 + Rbv
	
	S8ADDQ:
	Rc  <- Rav * 8 + Rbv


Scaled Quadword Subtract
	S4SUBQ	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S4SUBQ	Ra.rq,#b.ib,Rc.wq	!Operate Format
	S8SUBQ	Ra.rq,Rb.rq,Rc.wq	!Operate Format
	S8SUBQ	Ra.rq,#b.ib,Rc.wq	!Operate Format

	S4ADDQ:
	Rc  <- Rav * 4 - Rbv
	
	S8ADDQ:
	Rc  <- Rav * 8 - Rbv


	S4ADDL	10.02
	S4SUBL	10.0B
	S4ADDQ	10.22	
	S4SUBQ	10.2B

	S8ADDL	10.12
	S8SUBL	10.1B
	S8ADDQ	10.32
	S8SUBQ	10.3B

	// -----------------------------------------------------------------



Longword Multiply
	MULL	Ra.rq,Rb.rq,Rc.rq	!Operate Format
	MULL	Ra.Rq,#b.ib,Rc.wq	!Operate Format
	
	Rc <- SEXT((Rav*Rbv)<31:0>)



Quadword Multiply
	MULQ	Ra.rq,Rb.rq,Rc.rq	!Operate Format
	MULQ	Ra.Rq,#b.ib,Rc.wq	!Operate Format

	Rc <- Rav * Rbv (Signed)


Unsigned Quadword Multiply High
	UMULH	Ra.rq,Rb.rq,Rc.rq	!Operate Format
	UMULH	Ra.Rq,#b.ib,Rc.wq	!Operate Format

	Rc <- {Rav *U Rbv} <127:64>


	MULL	13.00
	MULL/V	13.40
	MULQ	12.20
	MULQ/V	13.60
	UMULH	13.30



OTHER OPERATION IMPLEMENTATION

	DIV not exits on Alpha and Realized as Library Functions.
It's because of High-Speed RISC Architecture..

		

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