What registers are affected by MUL and Imul instructions?
The MUL instruction multiplies unsigned numbers. IMUL multiplies signed numbers. For both instructions, one factor must be in the accumulator register (AL for 8-bit numbers, AX for 16-bit numbers, EAX for 32-bit numbers).
What are the flags affected by the multiplication process?
The six flags are the zero flag (ZF), carry flag (CF), overflow flag (OF), sign flag (SF), auxiliary flag (AF), and parity flag (PF). These six flags are referred to as the status flags.
Which flag is affected after execution of test instruction?
CMP and TEST instructions affect flags only and do not store a result (these instruction are used to make decisions during program execution). These instructions affect these flags only: CF, ZF, SF, OF, PF, AF.
Which group of instructions affect the flags?
Flags are affected by the branch instructions.
Which flag is not updated by INR?
The result of increment will be stored in R updating its previous content. All flags, except Cy flag, are affected depending on the result thus produced.
Does INR affect carry flag?
INR operation doesn’t affect Carry flag(CY).
What is the difference between INR and INX?
INR instruction increases the result of a designated register by 1. IXR instruction increases the result of the whole register pair by 1. For example, in the HL register, INX H will increase the value of the location being pointed by whole HL pair by 1.
Does DCX affect zero flag?
DCX is another mnemonic used to decrement the content of register – pair by 1 . However NO flags are affected by DCX .
What does the instruction dad H stand for?
Here, DAD is a mnemonic, which stands for Double ADd and also rp stands for any one of the following register pairs as mentioned below. rp = BC, DE, or HL. As rp can have any of the three values, there are three opcodes for this type of instruction. It occupies only 1-Byte in memory. Mnemonics, Operand.
What is Father instruction for?
In 8085 Instruction set, DAD SP instruction is a special case of DAD rp instruction. In this instruction contents of HL and SP will get added and sum thus produced will get stored onto HL register pair. It occupies only 1-Byte in memory.
What is the full form of Dad?
DAD
| Definition | : | Duplicate Address Detection |
|---|---|---|
| Category | : | Computing ยป Networking |
| Country/ Region | : | Worldwide |
| Popularity | : |
What is true about program counter?
A program counter is a register in a computer processor that contains the address (location) of the instruction being executed at the current time. As each instruction gets fetched, the program counter increases its stored value by 1.
What is the purpose of program counter?
PROGRAM COUNTER. The program counter, PC, is a special-purpose register that is used by the processor to hold the address of the next instruction to be executed. The PLA automatically updates the PC to point to the next instruction during the op-code decode cycle.
What is RA in MIPS?
On function entry, ra holds the return address where our caller wants us to jump when we’re done. The function preamble saves it to the stack because the function body uses jal to make function calls.