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How does an if statement work in assembly?
This form of the IF statement uses the TEST instruction to check the specified register to see if it is zero. If the register is not zero (true), then the program jumps around the statements after the THEN clause with a JNZ instruction.
How do you explain an if statement?
The IF statement is a decision-making statement that guides a program to make decisions based on specified criteria. The IF statement executes one set of code if a specified condition is met (TRUE) or another set of code evaluates to FALSE.
How do you check if a number is even or odd in assembly language?
The AND Instruction If you need to clear the high-order bits to zero, you AND it with 0FH. Let’s take up another example. If you want to check whether a given number is odd or even, a simple test would be to check the least significant bit of the number. If this is 1, the number is odd, else the number is even.
How do you compare Assembly?
In assembly, all branching is done using two types of instruction:
- A compare instruction, like “cmp”, compares two values. Internally, it does this by subtracting them.
- A conditional jump instruction, like “je” (jump-if-equal), does a goto somewhere if the two values satisfy the right condition.
How do you jump in assembly?
Sr.No. This is performed by the JMP instruction….Conditional Jump.
| Instruction | Description | Flags tested |
|---|---|---|
| JNE/JNZ | Jump not Equal or Jump Not Zero | ZF |
| JA/JNBE | Jump Above or Jump Not Below/Equal | CF, ZF |
| JAE/JNB | Jump Above/Equal or Jump Not Below | CF |
| JB/JNAE | Jump Below or Jump Not Above/Equal | CF |
What does XOR do in assembly?
The XOR instruction performs a bit wise Exclusive OR operation between corresponding bits in the two operands and places the result in the first operand. reg, mem, and immed can be 8, 16, or 32 bits. The XOR instruction can be used to reverse selected bits in an operand while preserving the remaining bits.
What is assembly language examples?
Typical examples of large assembly language programs from this time are IBM PC DOS operating systems, the Turbo Pascal compiler and early applications such as the spreadsheet program Lotus 1-2-3.