Intel 8XC196NP, 80C196NU, Microcontroller manual Shrl Logical Right Shift DOUBLE-WORD, Skip

INSTRUCTION SET REFERENCE

Table A-6. Instruction Set (Continued)

Mnemonic				Operation							Instruction Format
SHRL	LOGICAL RIGHT SHIFT DOUBLE-WORD.
	Shifts the destination double-word operand to									SHRL	lreg,#count
	the right as many times as specified by the
										(00001100) (count) (lreg)
	count operand. The count may be specified
										or
	either as an immediate value in the range of 0
	to 15 (0FH), inclusive, or as the content of									SHRL	lreg,breg
	any register (10H – 0FFH) with a value in the
										(00001100) (breg) (lreg)
	range of 0 to 31 (1FH), inclusive. The left bits
	of the result are filled with zeros. The last bit
	shifted out is saved in the carry flag.									NOTES:	This instruction clears the
	Temp ← (COUNT)
											sticky bit flag at the beginning
	do while Temp ≠			0							of the instruction. If at any time
	C ← Low order bit of (DEST)										during the shift a “1” is shifted
	(DEST) ← (DEST)/2)										into the carry flag and another
	Temp ← Temp – 1										shift cycle occurs, the instruc-
	end_while										tion sets the sticky bit flag.
											In this operation, DEST/2 rep-
			PSW Flag Settings
											resents unsigned division.
		Z	N			C	V	VT	ST
		✓	0			✓	0	—	✓
SJMP	SHORT JUMP. Adds to the program counter
	the offset between the end of this instruction									SJMP	cadd
	and the target label, effecting the jump. The
										(00100xxx) (disp-low)
	offset must be in the range of –1024 to
	+1023, inclusive.
	PC ← PC + 11-bit disp									NOTE:	The displacement (disp) is sign-
											extended to 16 bits in the 64-
			PSW Flag Settings								Kbyte addressing mode and to 24
											bits in the 1-Mbyte addressing
		Z	N			C	V	VT	ST
											mode. This displacement may
		—	—		—	—	—	—
											cause the program counter to
											cross a page boundary in 1-Mbyte
											mode.
SKIP	TWO BYTE NO-OPERATION. Does nothing.
	Control passes to the next sequential									SKIP	breg
	instruction. This is actually a two-byte NOP in
										(00000000) (breg)
	which the second byte can be any value and
	is simply ignored.
			PSW Flag Settings
		Z	N			C	V	VT	ST
		—	—		—	—	—	—

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