Sf zf cf

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August undefined, 2024

WebNote: The mask column in the table is the AND bitmask (as hexadecimal value) to query the flag(s) within FLAGS register value.. Usage. All FLAGS registers contain the condition … Web1. Where indicated, write down the values of the Carry, Sign, Zero, and overflow flags after each instruction is executed Verify your solution by running the program using the 8086 emulator. You must include the screen shot of your program to receive credit. ax, 7FF0h mov al, 10h add SF CF ZF OF ah, 1 add CF SF ZF OF add SF 2 CF ax ZF OF

ZF, SF, PF, and AF Flags - DocsLib

Web若运算结果为0，则zf的值为1，否则其值为0，在判断运算结果是否为0时，可以使用此标志。 xor eax,eax //异或运算：相同为0，不同为1 ；所以zf的值为1 （5）.符号标志sf（sign flag）:符号标志sf用来反映运算结果的符号位，它与运算结果的最高位相同。 mov al,7f WebOperation SF:ZF:xx:AF:xx:PF:xx:CF -> AH Description Transfers the low byte of the flags word to the AH register. The bits (lsb to msb) are: sign, zero, indeterminate, auxiliary carry, indeterminate, parity, indeterminate, and carry. Example Transfer the flags word into the AH register: lahf Store AH into Flags (sahf) sahf Operation reason for an enlarged spleen

Arithmetic Flags and Instructions - Carleton University

WebOF DF IF TF SF ZF AF PF CF; 如上图所示，1,3,5,12,13,14,15位没有使用，没有任何意义，而其他几位都有不同的含义。 ZF标志. ZF(Zero Flag)位于flag第6位，零标志位，功能是记录相关指令执行后结果是否为0，如果结果为0，则ZF=1，否则ZF=0。如： Web31 Jul 2015 · CARRY FLAG(CF): The Carry flag is set to 1 whenever there is a carry from MSB or borrow to MSB. ... it is considered as arithmetically negative. Hence the SF=1. So … WebAH -> SF:ZF:xx:AF:xx:PF:xx:CF . Description. Loads flags (sign, zero, indeterminate, auxiliary carry, indeterminate, parity, indeterminate, and carry) with values from the AH register. … reason for an r rating

Register content and Flag status after Instructions

Sf zf cf

6.) Give the difference and the flag settings for SF, Chegg.com

Web25 Mar 2024 · According to the result, the status flags SF, ZF and PF will be set. It should be noted that the TEST instruction doesn’t make any changes to the operands used with the … http://www.electricmonk.org.uk/2012/03/13/lahf-and-shaf-cpu-instructions/

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WebQuestion: Determine content of the destination operand & the status flags for the following instructions. Note: series of instructions would be executed in sequence. Destination operand SF ZF PF CF AF OF 1. MOV AL.01 MOV BL23 2 AND BL.AL [Choose > OR BL.AL [Choose ] < NOT BL [Choose ] XOR BL.AL [Choose ] > TEST AL.BL [ Choose ] < SHL … Web13 Feb 2024 · AF, OF, SF, ZF, PF, and CF are updated by the CMP instruction. Types of operands supported Instruction Operands ----- CMP REG, memory memory, REG REG, REG memory, immediate REG, immediate result is not stored anywhere, flags are set (OF, SF, ZF, AF, PF, CF) according to the result. Sample Code. CMP CX,BX If you compare CX with BX. ...

http://saodiseng.mengmianren.com/post/tag119665t236t1681092005.html WebThe lower eight bits of flag register includes SF, ZF, AF, PF and CF flags. It does not require any operand. 12. SAHF. The SAHF instruction stores the 8-bit data of AH register into the …

Webcf: 进位标志位。在无符号运算时，记录了运算结果的最高有效位向更高位的进位值或从更高位借位，产生进位或借位时cf = 1 ，否则cf = 0 ； zf: 零标志位。相关指令执行后结果为 0 那么zf = 1, 结果不为 0 则zf = 0 ； sf: 符号标志位。相关指令执行后结果为负那么sf = 1 ，结果非负数则sf = 0 ； of: 溢出 ... WebFind the flag settings for SF, ZF, CF, OF, and PF after adding 62A0 to each of the following values: (a) 1234 (b) 4321 (c) CFA0 (d) 9D60 5. Write an instruction using based indexed …

WebGive the difference and the flag settings for SF, ZF, CF, OF, and PF after subtracting 4AE0 from each of the following: (a) 1234 (b) 5D90 (c) 9090 (d) EA04 7 Use the examples in Ser …

Web7 Mar 2024 · 实验二算术逻辑运算及移位操作一．实验任务 1.实验程序段及结果表格如表：标志位 cf zf sf of pf af 程序段 1： 0 0 0 0 0 0 mov ax, 1018h 0 0 0 0 0 0 mov si, 230ah 0 0 0 0 0 0 add ax, si 0 0 0 0 1 1 add al, 30h 0 0 0 0 0 0 mov dx, 3ffh 0 0 0 0 0 0 add ax，bx 0 0 0 0 0 0 mov [20h], 1000h 0 0 0 0 0 0 add [20h], ax 0 0 0 0 0 0 push ax 0 0 0 0 0 0 pop bx 0 0 0 ... reason for anna faris and chris pratt divorceWebflag寄存器（标志寄存器）是一个十六位寄存器，flag寄存器的1、2、3、12、13、14、15位没有任何含义。其余各位分别代表不同的意义ZF标志指令执行后，其结果是否为0，若结果为0，那么ZF=1；如果不为0，那么ZF=0。PF标志指令执行后，其结果的二进制表示中1的个数是否为偶数，若1的个数为偶数，PF=1 ... reason for applying as a policehttp://service.scs.carleton.ca/sivarama/asm_book_web/student_copies/ch6_arithmetic.pdf reason for applying scholarship sample letterWebZF (Zero Flag): 1 (result is zero) 0 (otherwise) • CF (Carry Flag) – If the sum of two numbers is one bit longer than the operands, the extra 1 is a carry (or carry out ) ÆCF=1 • A 1 carried into the highest-order (sign, leftmost) bit position during addition is called a “ carry in” – CF=1 for borrow (or no carry) in subtraction. reason for applying for support workerWebCF, PF, SF, ZF, OF AF undefined OF undefined if count . ≠ . 1 . SAR : Shift arithmetic right : SAR D, Count : Shift the (D) right by the number of bit positions equal to Count and fill the vacated bits positions on the left with original most … reason for applying with thbsWeb1.) It is a control transfer instructions that jumps if the value of the ZF=1. a.) JC b.) JNE c.) JE d.) JNC 2.) What is the content of the destination operand and the condition of the … reason for arnott take medicaidWeb25 Mar 2024 · [SF] [ZF] [0] [AF] [0] [PF] [1] [CF] Now if you want to check the flags and take appropriate action in response to status of these flags, it is better to use "Conditional … reason for armpit pain