Analog Devices ADSP-21020 manual Notation Meaning, Italics, Name Description

ADSP-21020

IMMEDIATE MOVE INSTRUCTIONS

14a. DM(<addr32>) = ureg ; PM(<addr24>)

14b. ureg =	DM(<addr32>)	;
	PM(<addr24>)

15a. DM(<data32>, Ia) = ureg; PM(< data24>, Ic)

15b. ureg =	DM(<data32>, Ia)	;
	PM(<data24>, Ic)

16.DM(Ia, Mb) = <data32>; PM(Ic, Md)

17.ureg = <data32>;

MISCELLANEOUS INSTRUCTIONS
18.	BIT		SET	sreg <data32>;
			CLR
			TGL
			TST
			XOR
19a. MODIFY			(Ia, <data32>)		;
			(Ic, <data32>)
19b. BITREV			(Ia, <data32>)			;
20.		PUSH	LOOP	,			PUSH	STS ;
		POP					POP

21.NOP ;

22.IDLE ;

Table I. Syntax Notation Conventions

Notation	Meaning
UPPERCASE	Explicit syntax—assembler keyword (nota-
	tion only; assembler is not case-sensitive
	and lowercase is the preferred programming
	convention)
;	Instruction terminator
,	Separates parallel operations in an
	instruction
italics	Optional part of instruction
between lines	List of options (choose one)
<datan>	n-bit immediate data value
<addrn>	n-bit immediate address value
<reladdrn>	n-bit immediate PC-relative address value
compute	ALU, multiplier, shifter or multifunction
	operation (from Tables IV-VII)
shiftimm	Shifter immediate operation
	(from Table VI)
condition	Status condition (from Table II)
termination	Termination condition (from Table II)
ureg	Universal register (from Table III)
sreg	System register (from Table III)
dreg	R15-R0, F15-F0; register file location
Ia	I7-I0; DAG1 index register
Mb	M7-M0; DAG1 modify register
Ic	I15-I8; DAG2 index register
Md	M15-M8; DAG2 modify register

Table II. Condition and Termination Codes
Name	Description
eq	ALU equal to zero
ne	ALU not equal to zero
ge	ALU greater than or equal to zero
lt	ALU less than zero
le	ALU less than or equal to zero
gt	ALU greater than zero
ac	ALU carry
not ac	Not ALU carry
av	ALU overflow
not av	Not ALU overflow
mv	Multiplier overflow
not mv	Not multiplier overflow
ms	Multiplier sign
not ms	Not multiplier sign
sv	Shifter overflow
not sv	Not shifter overflow
sz	Shifter zero
not sz	Not shifter zero
flag0_in	Flag 0
not flag0_in	Not Flag 0
flag1_in	Flag 1
not flag1_in	Not Flag l
flag2_in	Flag 2
not flag2_in	Not Flag 2
flag3_in	Flag 3
not flag3_in	Not Flag 3
tf	Bit test flag
not tf	Not bit test flag
lce	Loop counter expired (DO UNTIL)
not lce	Loop counter not expired (IF)
forever	Always False (DO UNTIL)
true	Always True (IF)

In a conditional instruction, the execution of the entire instruction is based on the specified condition.

–8– REV. C