Solution of assembly language code to arrange set of 32 bit data stored from memory location 0x1FFFF104 in ascending order, No. of data elements is stored on memory location 0x1FFFF100.

Solution:

;code prepared by PAILLA RAGHAVENDRA REDDY

        TTL ascending
        AREA Myprog, CODE, READONLY
ENTRY
        EXPORT main
main
        LDR R7,=0x1FFFF100     ; initialize base address to register r7
        LDR R6,=0x00000000     ; inner loop shift value register r6
        LDR R5,=0x00000000    ; outer loop shift value register r5
       
        LDR R1,[R7,R6]        ; fetch first value for loop to the R1
        ADDS R7,R7,#0x04    ; Shift base address
        LSLS R1,R1,#0x02
        SUBS R1,R1,#0x04
       
LAB2    LDR R2, [R7,R5]
        ADDS R6,R6,#0x04
NEXT    LDR R3, [R7,R6]
        CMP R3,R2
        BLO LAB1
        STR R3,[R7,R5]
        STR R2,[R7,R6]
        LDR R2,[R7,R5]
        LDR R3,[R7,R6]
LAB1    ADDS R6,R6,#0x04
        CMP R6,R1
        BLS NEXT
        ADDS R5,R5,#0x04
        MOV R6,R5
        CMP R1,R6
        BEQ done
        CMP R5,R1
        BNE LAB2
done
        SWI &11
        END

Input:

Result: