Which instruction is used for subtraction with borrow?
SBB
SBB is a mnemonic that stands for ‘SuBtract with Borrow’ and ‘R’ stands for any of the following 7 registers, and also memory location M as pointed by HL register pair. This instruction is used to compute subtraction between contents of R register from the Accumulator’s content, along with the carry (borrow) value.
What is the subtraction with borrow operation How does it work?
The Subtract-with-Borrow (and, similarly, Add-with-Carry) instruction allows you to do subtraction on data larger than 8 bits by handling 8 bits at a time, and including a “borrow” from the previous 8-bit operation.
What does SBB do in assembly?
SBB means “subtract with borrow”. It subtracts the source from the destination in a way that takes the carry flag ( CF ) into account.
Which flag is affected by SBB instruction Mcq?
Explanation: The SBB instruction subtracts the source operand and the borrow flag from the destination operand. Explanation: If borrow exists in the subtraction operation performed then carry flag is set.
Which instruction is used to subtract Accumulator content borrow immediate data )?
In 8085 Instruction set, SUI is a mnemonic that stands for ‘SUbtract Immediate from Accumulator’ and here d8 stands for any 8-bit or 1-Byte data. This instruction is used to subtract 8-bit immediate data from the Accumulator.
Which flag is affected by SBB instruction?
The SF flag indicates the sign of the signed result. The SBB instruction is usually executed as part of a multibyte or multiword subtraction in which a SUB instruction is followed by a SBB instruction.
What is subtract in assembly?
Description. Subtracts operand1 from operand2 and stores the result in operand2. When an immediate byte value is subtracted from a word, the immediate value is sign-extended to the size of the word operand before the subtract operation is executed.
Which flag is affected by JBE?
Intel x86 JUMP quick reference
| Instruction | Description | Flags |
|---|---|---|
| JBE JNA | Jump if below or equal Jump if not above | CF = 1 or ZF = 1 |
| JA JNBE | Jump if above Jump if not below or equal | CF = 0 and ZF = 0 |
| JL JNGE | Jump if less Jump if not greater or equal | SF <> OF |
| JGE JNL | Jump if greater or equal Jump if not less | SF = OF |
Which flag acts as a borrow flag in the instruction SBB?
Discussion Forum
| Que. | The flag that acts as Borrow flag in the instruction, SBB is |
|---|---|
| b. | carry flag |
| c. | parity flag |
| d. | trap flag |
| Answer:carry flag |
Which instruction subtract the contents of memory location with Accumulator without carry or borrow?
JNC is used to jump if no borrow (3 Byte instruction) SUB is used to subtract two numbers where one number is in accumulator(1 Byte)
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