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9.0

Need help with translating C code to mips assembly

Asked by errang in Assembly Programming Language, C Programming Language

Tags: mips assembly, c

Hey,

I need some help with translating C code to mips assembly.

A few things I'm unsure about the mips code I wrote are:

Not exactly sure how to test or use arguments.

True or False, I'm assuming True is 1, and False is 0.

How to do return statements.

Appreciate any help on this.

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             bool singleton(int value) {  
  //Check if value = 0
  if (value == 0) return false;
	
  //This just implements the trick given in project description
  int compare = value-1;
  bool truth = value & compare;
  if (truth == 0) 
    return true;
  else 
    return false;
}
 
value = t1;
compare = t2;
t3 = value - 1;
 
 
singleton:
 
  beq $t1, $0, end
  sub $t3, $t1, 1
  lw $t2, $t3
 
  and $t4, $t1, $t2 //Truth statement
 
  bne $t4, $0, end
 
  lw $t5, 1 //True
 
end:
 
  lw $t5, 0 //False
 
**********************************************************************************************************
 
int get_singleton(int value) {
  int position = 0;
  bool found = false;
  // There's only one set bit so we continue shifting right until we find it.
  // We find it by shifting right and ANDing with 1 where 1 is 0x01.
  // Every time it's not found we increment position.
  while(!found){     
    found = 1 & value;
    value = value >> 1;
    position++; 
  }
  return position;
}
 
position = t1;
found = t2;
value = s1;
 
get_singleton:
 
	lw $t1, $0
	lw $t2, $0
	
	loop:
	
		and $t3, $t1, $s1
		srl $s1, $s1, 1
		addi $t1, $t1, 1
	
	bne $t2, $0, loop
	
	jr $ra

           
         

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Need help with translating C code to mips assembly

Asked by errang in Assembly Programming Language, C Programming Language

Tags: mips assembly, c

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