IntroductionToComputing/count1s.s at main · azizosharke/IntroductionToComputing · GitHub

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  .syntax unified
  .cpu cortex-m4
  .thumb
  .global  Main

Main:


  @
  @ write your program here
  @
MOV R0 , #0                              @ value =0
MOV R3 , #0                              @ result = 0 ;
MOV R4 , #0                              @ onesRow = 0 ;
MOV R5 , #32                             @ b = 32
MOV R6 , #1

For :                                    @ for ( result = 0 ; result < 32 ; result ++)
CMP R3 , R5
BHS EndFor
MOVS R1 ,R1, LSL R6                     @ ( shift the bits to the left )
BCC ElseIf                              @ { if ( BSS) {
ADD R4, R4, R6                          @ onesRow = onesRow + 1

ElseIf :                                @ else if {
BCS EndIf                               @ if ( onesRow > value )
CMP R4, R0
BLE EndIf2
MOV R0 , #0                             @ value = 0 ;
ADD R0, R0, R4                          @ value = value + onesRow
EndIf2 :
MOV R4, #0                              @ onesRow = 0 ;
EndIf :
ADD R3, R6                              @ result = result + 1 ;
B For
EndFor :
CMP R4, R0                              @ if ( onesRow > value )
BLE End
MOV R0 ,#0                              @ value = 0 ;
ADD R0,R0, R4                           @ value = value + onesRow
End :

  @ End of program ... check your result

End_Main:
  BX    lr

.end