ASS7

section .data
    nline       db      10,10
    nline_len   equ     $-nline

    space       db      " "

    ano         db  10,     "   Assignment no: 7",
                db  10,     " --------------------------------------------------- ",
                db  10,     " Block Transfer-Non overlapped with String instruction.",
                db  10,     " ---------------------------------------------------------", 10
    ano_len     equ $-ano

    bmsg        db  10,     "Before Transfer::"
    bmsg_len    equ $-bmsg

    amsg        db  10,     "After Transfer::"
    amsg_len    equ $-amsg

    smsg        db  10,     "   Source Block            :"
    smsg_len    equ $-smsg

    dmsg        db  10,     "   Destination Block       :"
    dmsg_len    equ $-dmsg

    sblock      db  11h, 22h, 33h, 44h, 55h
    dblock      times   5   db  0

;------------------------------------------------------------------------------
section .bss
    char_ans resB   2
;-----------------------------------------------------------------------------

%macro  Print   2
    MOV RAX,1
    MOV RDI,1
    MOV RSI,%1
    MOV RDX,%2
    syscall
%endmacro

%macro  Read    2
    MOV RAX, 0
    MOV RDI, 0
    MOV RSI, %1
    MOV RDX, %2
    syscall
%endmacro


%macro  Exit    0
    Print   nline, nline_len
    MOV RAX,60
    MOV RDI,0
    syscall
%endmacro
;---------------------------------------------------------------

section .text
    global _start

_start:
    Print   ano, ano_len

    Print   bmsg, bmsg_len

    Print   smsg, smsg_len
    mov     rsi, sblock
    call    disp_block

    Print   dmsg, dmsg_len
    mov     rsi, dblock-2
    call    disp_block

    call    BT_NO

    Print   amsg, amsg_len

    Print   smsg, smsg_len
    mov     rsi, sblock
    call    disp_block

    Print   dmsg, dmsg_len
    mov     rsi, dblock-2
    call    disp_block

Exit
;-----------------------------------------------------------------
BT_NO:
    mov rsi,sblock+4
    mov rdi,dblock+2
    mov rcx,5

    STD
    REP MOVSB
RET
;-----------------------------------------------------------------
disp_block:
    mov     rbp,5       ;counter as 5 values

next_num:
    mov     al,[rsi]
    push    rsi

    call    Disp_8
    Print   space,1

    pop rsi
    inc rsi

    dec rbp
    jnz next_num
RET
;---------------------------------------------------------------
Disp_8:
    MOV RSI,char_ans + 1
    MOV RCX,2       ;counter
    MOV RBX,16      ;Hex no

next_digit:
    XOR RDX,RDX
    DIV RBX

    CMP DL,9
    JBE add30
    ADD DL,07H

add30   :
    ADD DL,30H
    MOV [RSI],DL

    DEC RSI
    DEC RCX
    JNZ next_digit

    Print   char_ans,2
ret