Actually you have only found the instruction, so it’s not ending there from your spec. Write out the machine code for the MIPS instruction. In order to write the machine code for this instruction you need to look at MIPS reference sheet MIPS Reference sheet If you look at the sheet the lw has opcode 35 and for $1 is 17 , … Read more
Can you please tell me the difference between JUMP IF ABOVE AND JUMP IF GREATER in Assembly language? when do i use each of them? do they give me different results?
The dword ptr part is called a size directive. This page explains them, but it wasn’t possible to direct-link to the correct section. Basically, it means “the size of the target operand is 32 bits”, so this will bitwise-AND the 32-bit value at the address computed by taking the contents of the ebp register and … Read more
Shifting a number n bits left multiples the number by 2n. For example n << 3 = n*2³ = n*8. The corresponding instruction is To multiply any number you can split the number into sums of power of 2s. For example: n*10 = n*8 + n*2 = (n << 3) + (n << 1) SLL … Read more
Caller-saved registers (AKA volatile registers, or call-clobbered) are used to hold temporary quantities that need not be preserved across calls. For that reason, it is the caller’s responsibility to push these registers onto the stack or copy them somewhere else if it wants to restore this value after a procedure call. It’s normal to let … Read more
will jump out of the loop as soon as x equals 10. If you subtract 10 from x, you’ll get a negative value until x equals 10 (and the value is 0). So using skpcond000 would be wrong as it would jump out too soon. So skpcond400 is correct. Perhaps it is easier to understand … Read more
Have you tried int 21h service 2? DL is the character to print. To print the integer value, you’ll have to write a loop to decompose the integer to individual characters. If you’re okay with printing the value in hex, this is pretty trivial. If you can’t rely on DOS services, you might also be … Read more
There is a generic concept generally called a “handle” in the context of computer software APIs. In the comments you have probably found a link to the Wikipedia article on that subject. You are dealing with a specific implementation of a handle data type — the IBM PC/DOS file handles returned from the int 0x21 interface. If you … Read more
JE and JZ are just different names for exactly the same thing: a conditional jump when ZF (the “zero” flag) is equal to 1. (Similarly, JNE and JNZ are just different names for a conditional jump when ZF is equal to 0.) You could use them interchangeably, but you should use them depending on what you are doing: JZ/JNZ are more appropriate when you are explicitly testing for something being equal … Read more
This link explains how to print to the screen in a MIPS simulator like QTSPIM or MARS. As for the code, there were a few bugs. The line li $a0, 0 is overwriting the work done by the initial la $a0, Array instruction because the li is setting the base address of your array to 0. Instead, you should move the la instruction into the loop so … Read more