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Rcl instruction example

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MessagePosté le: Mar 2 Jan - 07:48 (2018)    Sujet du message: Rcl instruction example Répondre en citant

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rcr example

ror instruction in 8086 microprocessor

rol instruction example

ror instruction example

rotate instruction ror

rcr instruction example

rotate instruction in 8086 with example

rcl instruction in 8086

42. RCL and RCR, Rotate With Carry. RCL Instruction. RCR Instruction. <<< ROL and ROR, Rotate Without Carry · Index · EQU directive >>>
RCL and RCR Instructions. Rotate and Carry Left/Right. Syntax: same as for shift instructions. Example: AL = 10101111b RCL AL, 1 ; AL = , CF = RCR AL, 3 ; AL = , CF =
Opcode. Instruction. Description. D0 /2. RCL r/m8,1. Rotate 9 bits (CF,r/m8) left once. D2 /2. RCL r/m8,CL. Rotate 9 bits (CF,r/m8) left CL times. C0 /2 ib. RCL r/m8,imm8. Rotate 9 bits (CF,r/m8) left imm8 times. D1 /2. RCL r/m16,1. Rotate 17 bits (CF,r/m16) left once. D3 /2. RCL r/m16,CL. Rotate 17 bits (CF,r/m16) left CL times.
RCL - Rotate Through Carry Left. Usage: RCL dest,count. Modifies Flags: CF OF. Rotates the bits in Repeats execution of string instructions while CX != 0. After each string operation, CX is decremented and the Zero Flag is the 386 may result in errors if an interrupt occurs before CX=0. Look at example, how to avoid it.
5. Rotate Instructions. • Rotate Through Carry. The rcl (Rotate through Carry Left) and rcr (Rotate through Carry. Right) instruction include the carry flag in the rotation process. – rcl AL, 1 ; [rcl destination, count]. – rcr BL, 1 ; [rcl destination, count]. Rotate Instructions. Examples
Rotate With Carry Left (rcl). rcl{bwl} imm8, r/m[8|16|32] rcl{bwl} %cl, r/m[8|16|32]. Operation. r/m high-order bit -> CF. CF -> r/m low-order bit. r/m -> ShiftLeft. Description. The left rotate instruction shifts all bits in the register or memory operand specified. The carry flag (CF) is included in the rotation. The most significant bit is
12 Feb 2011 Rotates are required for bit shifts across multiple words. When you SHL the lower word, the high-order bit spills out into the carry. To complete the operation, you need to shift the higher word(s) while bringing in the carry to the low-order bit. RCL is the instruction that accomplishes this. High word Low word
Example – Recovery a Carry Flag Bit. • RCL can recover a bit that has previously been shifted into the Carry flag: .data testval. BYTE. 01101010b .code shr testval, 1. ; shift LSB into CF jc quit. ; exit if Carry. ; Flag set rcl testval, 1. ; else restore the. ; number. RCR Instruction. • The RCR (Rotate and Carry Right) instruction
The instruction rcl shifts bits to the left; The msb is shifted into cf; cf is shifted into the rightmost bit. Rotate through Carry Right. rcr rotates bits to the right; The rightmost bit is shifted into cf; cf is shifted into the msb. See SHIFT.ASM for an example. Multiplication by 5. ;Assume AX contains a number N to be multiplied by 5.
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