hi how can i write the following statement in assembly language.

Question

hi how can i write the following  statement in assembly language.

walters · Answer

while (n>1){
if ( n is even)

n : = n/2
else
n:=3*n+1
}

walters · Answer

@Opcode

anonymous · Answer

8086?
mips?

walters · Answer

yes pls help
@A.Avinash_Goutham

walters · Answer

8086

walters · Answer

@hartnn

espex · Answer

In MIPS, your code will look like this:

             .data
N:  .word  30
           
            .text
main:
      add $t0, $zero, N          # copy N into the register
      
WHILE:
     blt $t0, 1, END              # while (n > 1)
      sll $t1, $t0, 31              # shift out so only least sig bit remains
      beq $t1, 1, ODD            # else { ... }
      sra  $s0, $t0, 1              # n = n/2
      add $t0, $s0, $zero       # copy result back to temp register
      j WHILE

ODD:
      sla $s0, $t0, 1                # multiply by two
      add $s0, $t0, $zero        # add N
      add $s0, $zero, 1           # + 1
      add $t0, $s0, $zero        # copy result back into register
      j WHILE

END:
       sw $t0, N                       # write N to memory
       jr $ra

walters · Answer

@eSpeX what about 8086

walters · Answer

@artofspeed and @nubeer

espex · Answer

I do not have experience with the 8086 instruction set, it was my hope that you could take what you have learned and adapt the logic and instructions to match those that you are using.

walters · Answer

how to use modulus using assembly

espex · Answer

You won't really use modulus per se, you are dealing with binary, which is why I logically shifted the number to the left. Any 'odd' number will have to set the least significant bit, if it is a 0, then the number is even.

walters · Answer

so tell me wat is the deffrence between 8086 and mips

espex · Answer

They use a different instruction set, while they do basically the same thing, it is a difference in how the instruction is formed.

walters · Answer

so to run it i need to install  mips software or should i use MASM615

espex · Answer

If I recall correctly, the MASM assembler interprets only the 8086 instruction set, if you want to compile MIPS, try using the QtSPIM assembler. http://sourceforge.net/projects/spimsimulator/

espex · Answer

A cursory review of the x86 instructions show that they have some of the same instructions as MIPS, so it should be completely doable to convert the code I've given into instructions you can use with the 8086 assembler.