Rcr-rcl-logic instruction-microprocessor, Assembly Language

RCR: Rotate Right through Carry:- This instruction rotates the contents  bit-wise of the destination operand right by the specified count through carry flag (CF). For each operation, the carry flag is pushed into the MSB of the operand and the LSB is pushed into carry flag.  Remaining bits are shifted right by the specified count positions. The PF, SF, ZF are not changed. The operand can be or memory location or a register. Given figure explains this operation.

1974_RCR.jpg

                                                Figure: Execution of RCR Instruction

 

RCL: Rotate Left through Carry:- This instruction rotates bit-wise the contents of the destination operand left by the specified count through the carry flag (CF). For each operation, the carry flag is pushed into LSB, and the MSB is pushed into the carry flag. Remaining bits are shifted left by the mention positions. The PF, SF, ZF are left operation. The operand can be memory location or a register. Given figure explains the operation.

1112_RCL.jpg

                                              Figure: Execution of RCL Instruction

The count for shifting or rotation is either 1 or is specified by using register CL, in case of all of the rotate and shift instructions.

 

Posted Date: 10/12/2012 3:12:40 AM | Location : United States







Related Discussions:- Rcr-rcl-logic instruction-microprocessor, Assignment Help, Ask Question on Rcr-rcl-logic instruction-microprocessor, Get Answer, Expert's Help, Rcr-rcl-logic instruction-microprocessor Discussions

Write discussion on Rcr-rcl-logic instruction-microprocessor
Your posts are moderated
Related Questions
Hold Response Sequence The HOLD pin is examined at leading edge of each clock pulse. If it is received active line by the processor before T4 of the earlier cycle/during the T1

The Alpha : The development of the Alpha chip start in the year 1988 The new chip used 64 bit technology, let users to pack  more  complexity  into  their  programs  than  exis

IInd Generation Microprocessor : The second generation microprocessor by using n MOS technology seemed in the market in 1973.   The Intel  8080, of nMOS  technology

LENGTH : Byte Length of a Label: This directive is not available in MASM. This is used to mention to the length of a data array or a string. MOV CX. LENGTH ARRAY This sta

move a byte string ,16 bytes long from the offset 0200H to 0300H in the segment 7000H..

I need to estimate the value of a definite integral using Riemann Sums and For our estimation let f(x) = x2 ,a=0, b=10 and n=5. Where a is the lower bound, b is the upper bound and

;StrNCpyAsm - copy zero terminated string2 to zero terminated string1, ; but copy no more than count (parameter) characters ; or the length of string2, whi

SEG : Segment of a Label:- The SEG operator is which is used to decide the segment address of the, variable, label or procedure and substitutes the segment base address in plac

PTR : Pointer:- The pointer operator which is used to declare the type of a variable, label or memory operand. The operator PTR is prefixed by either WORD or BYTE. If the prefi

There are 3 kinds of OCWs. The command word OCWI is utilized for masking the interrupt requests; when the mask bit corresponding to an interrupt request is value 1, then the requ