Texas Instruments MSP50C6xx manual Adds Add String, Clock , clk Words , w

Individual Instruction Descriptions

4.14.3 ADDS			Add String
Syntax
	[label]	name	dest, src, src1	Clock, clk	Words, w	With RPT, clk	Class
		ADDS	An[~], An, {adrs}	Table 4–46	Table 4–46	Table 4–46	1a
		ADDS	An[~], An[~], pma16	nS+4	2	N/R	2b
		ADDS	An[~], An~, An	nS+2	1	nR+2	3
		ADDS†	An[~], An[~], PH	1	1	1	3

†This instruction ignores the string count, executing only once but maintains the CF and ZF status of the previous multi- ply or shift operation as if the sequence was a single string. This instruction should immediately follow one of the fol- lowing class 1b instructions: MOVAPH, MULAPL, MULSPL, SHLTPL, SHLSPL, and SHLAPL. An interrupt should not occur between one of these instructions and ADDS. An interrupt may cause incorrect results. Interrupts must be explicitly disabled at least one instruction before the class 1b instruction. This special sequence is protected inside a BEGLOOP – ENDLOOP construct. In addition, single stepping is not allowed for this instruction. An in this instruc- tion should be the same as An in one of the listed class 1b instruction. Offsets are allowed. See Section 4.8 for more detail.

Execution	dest string ⇐			src string + src1 string
	PC ⇐ PC + w
Flags Affected	dest is An:						OF, SF, ZF, CF are set accordingly
	src1 is {adrs}:						TAG is set accordingly
Opcode
Instructions		16	15	14	13	12		11	10	9		8	7	6	5	4		3	2	1	0
ADDS An[~], An, {adrs}		0	0	0	0	~A		1	1		An						adrs
		x		dma16 (for direct) or offset16 (long relative) [see section 4.13]
ADDS An[~], An[~], pma16		1	1	1	0	0		1	1		An		0	0	0	0		0	1	A~	~A
		x										pma16
ADDS An[~], An~, An		1	1	1	0	0		1	1		An		0	0	1	0		1	0	A~	~A
ADDS An[~], An[~], PH		1	1	1	0	0		1	1		An		0	1	1	0		1	0	A~	~A
Description	Add value of src string to the value of src1 string and store resulting string in
	dest. String length minus two should be stored in STR before execution.
See Also	ADD, ADDB, SUB, SUBB, SUBS
Example 4.14.3.1	ADDS A0, A0~, *R2

Add data memory string beginning at address in R2 to accumulator string A0~, put result in accumulator string A0.

Example 4.14.3.2 ADDS A0, A0~, 0x1400

Add program memory string beginning at address 0x1400 to accumulator string A0~, put result in accumulator string A0.

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