Texas Instruments MSP50C6xx SUB Subtract, Dest, src , src1 , next a, An ~ , An , adrs , next a

Individual Instruction Descriptions

4.14.80 SUB				Subtract
Syntax
	[label]	name		dest, src, src1, [next A]]			Clock, clk	Word, w		With RPT, clk	Class
		SUB		An[~], An, {adrs} [, next A]			Table 4–46			Table 4–46	1a
		SUB		An[~], An[~], imm16 [, next A]			2		2	N/R	2b
		SUB		An[~], An[~], PH [, next A]			1		1	nR+3	3
		SUB		An[~], An, An~ [, next A]			1		1	nR+3	3
		SUB		An[~], An~, An [, next A]			1		1	nR+3	3
		SUB		Rx, imm16			2		2	N/R	4c
		SUB		Rx, R5			1		1	N/R	4d
Execution			[premodify AP if mod specified]
			dest ⇐		dest – src1	(for two operands)
			dest ⇐		src – src1	(for three operands)

PC ⇐ PC + w

Flags Affected	dest is An:
	dest is Rx:
	src1 is {adrs}:
Opcode

OF, SF, ZF, CF are set accordingly RCF, RZF are set accordingly TAG bit is set accordingly

Instructions		16		15	14		13		12		11	10		9		8	7	6	5	4		3		2	1	0
SUB An[~], An, {adrs} [, next A]		0		0	0		0		~A		next A				An						adrs
		x				dma16 (for direct) or offset16 (long relative) [see section 4.13]
SUB An[~], An[~], imm16 [, next A]		1		1	1		0		0		next A				An		0	1	0	0		0		1	A~	~A
SUB An[~], An[~], PH [, next A]		1		1	1		0		0		next A				An		0	1	1	0		0		0	A~	~A
SUB An[~], An, An~ [, next A]		1		1	1		0		0		next A				An		0	0	1	0		0		0	0	~A
SUB An[~], An~, An [, next A]		1		1	1		0		0		next A				An		0	0	1	0		0		0	1	~A
SUB Rx, imm16		1		1	1		1		1		1		1	0		0	0	0	1			Rx			0	0
SUB Rx, R5		1		1	1		1		1		1		1	0		0	1	0	1			Rx			0	0
Description	Subtract value of src from value of dest and store result in dest. If three
	operands are specified, then subtract value of src1 from value of src (i.e.,
	src-src1) and store result in dest string. Premodification of accumulator
	pointers		is allowed					with		some			operand				types. Note			that			subtraction is

performed in 2’s complement and therefore the CF (carry flag) may get set even when subtracting a smaller value from a larger value.

4-176