Slide 12.7: .WHILE directive

.WHILE Directive

The .WHILE directive tests the condition before executing the loop.

 .WHILE  condition
    statements
 .ENDW

Finding the Min and Max in an Array

 INCLUDE Irvine32.inc
 .data
   array    WORD  50, 70, 20, 10, 80
   prompt1  BYTE  "Minimum is ", 0
   prompt2  BYTE  "Maximum is ", 0

 .code
 main PROC
   mov    esi, OFFSET array
   mov    ecx, LENGTHOF array - 1
   movzx  eax, WORD PTR [esi]         ; EAX: minimum
   movzx  ebx, WORD PTR [esi]         ; EBX: maximum

   .WHILE ( ecx > 0 )
     add  esi, 2   
    
     
       
     
     
    
    
     
    
     
     
    
          mov  ax, [esi]
     .ELSEIF ( WORD PTR [esi] > bx )
       mov  bx, [esi]
     .ENDIF
     dec  ecx
   .ENDW

   mov    edx, OFFSET prompt1         ; print the minimum
   call   WriteString
   call   WriteDec
   call   Crlf

   mov    edx, OFFSET prompt2         ; print the maximum
   call   WriteString
   movzx  eax, bx
   call   WriteDec
   exit
 main ENDP
 END main