Texas Instruments MSP50C614 manual Zero or be set equal to the sign bit Xsgm dependent

Instruction Classification

Table 4±20. Class 3 Instruction Description (Continued)

		C3			Mnemonic	Description
0	1	0	0	0	XOR An[~], An~, An [, next A]	Logically exclusive OR accumulator with offset
					XORS An[~], An~, An	accumulator and store the results in accumulator (~A=0 or
						1). ALU status is modified.
0	1	0	0	1	OR An[~], An~, An [, next A]	Logically OR accumulator with offset accumulator and
					ORS An[~], An~, An	store results into accumulator (~A=0 or 1). ALU status is
						modified.
0	1	0	1	0	AND An[~], An~, An [, next A]	Logically AND accumulator with offset accumulator and
					ANDS An[~], An~, An	store result(s) into accumulator (~A=0 or 1). ALU status is
						modified.
0	1	0	1	1	SHRAC An[~], An[~] [, next A]	Shift accumulator or offset accumulator right 1 bit and
					SHRACS An[~], An[~]	store result in accumulator (~A=0 or 1). MSB will be set to
						zero or be set equal to the sign bit (XSGM dependent).
						ALU status is modified.
0	1	1	0	0	SUB An[~], An[~], PH [, next A]	Subtract product high register from accumulator (A~=0) or
					SUBS An[~], An[~], PH	from offset accumulator (A~=1) and store the result into
					²	accumulator (~A=0) or into the offset accumulator (~A=1).
						ALU status is modified. String bit causes subtract with
						carry status (CF).
0	1	1	0	1	ADD An[~], An[~], PH [, next A]	Add product high register to accumulator or to offset
					ADDS An[~], An[~], PH	accumulator and store the result into accumulator (~A=0
					²	or 1). ALU status is modified. The string bit causes an add
						with carry status (CF).
0	1	1	1	0	MOV An[~], PH [, next A]	Transfer product high register to accumulator (~A=0) or
					MOVS An[~], PH	offset accumulator (~A=1). ALU status is modified. String
					²	bit will cause stringing with current ZF status bit.
0	1	1	1	1	EXTSGN An[~] [, next A]	Copy SF bit in status register to all 16 bits of the
					EXTSGNS An[~]	accumulator or offset accumulator. On strings, the
					²	accumulator address is preincremented causing the sign
						of the addressed accumulator to be extended into the next
						accumulator address.
1	0	0	0	0	CMP An~, An [, next A]	Subtract offset accumulator from accumulator(A~=0) or
					CMP An, An~ [, next A]	subtract accumulator from offset accumulator (A~=1) and
					CMPS An~, An	store the status of the result into ALU status. Accumulator
					CMPS An, An~	or offset accumulator original value remains unchanged.
1	0	0	0	1	reserved	N/A
1	0	0	1	0	reserved	N/A
1	0	0	1	1	reserved	N/A

²These instructions have a special 1 word string operations when string mode is selected. The instructions ignore the string count, executing only once, but maintain the carry and comparison to zero operation of the previous arithmetic operation as if the sequence of the previous string instruction and current instruction were part of a larger string operation.

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