rectangles_in_asm

.code64
.text
.globl main
    .type   main, @function

write:
    pushq   %rcx
    movl    %eax,%esi
    movq    $format_out, %rdi
    xorq    %rax,%rax
    call    printf
    popq    %rcx
    ret

read:   movq    $8,%rcx

read1:
    movq    $format_in,%rdi

    movq    $Y2,%rsi
    movq    %rcx,%rax
    subq    $1,%rax
    movq    $4,%rdx
    mulq    %rdx
    addq    %rax,%rsi
    xorq    %rax,%rax

    pushq   %rcx
    call    scanf
    popq    %rcx
    loopl   read1
    ret

abs:
    cmpl    $0,%eax
    jge abs_end
    negl    %eax
abs_end:
    ret

max:
    pushq   %rbp
    movq    %rsp,%rbp
    movl    16(%rsp),%eax
    movl    24(%rsp),%ebx
    cmpl    %eax,%ebx
    jle max_a
    movl    %ebx,%eax
max_a:
    popq    %rbp
    ret

min:
    pushq   %rbp
    movq    %rsp,%rbp
    movl    16(%rsp),%eax
    movl    24(%rsp),%ebx
    cmpl    %eax,%ebx
    jge min_a
    movl    %ebx,%eax
min_a:
    popq    %rbp
    ret

square:
    movl    x2,%eax
    movl    x1,%ebx
    subl    %ebx,%eax
    call    abs
    pushq   %rax
    movl    y2,%eax
    movl    y1,%ebx
    subl    %ebx,%eax
    call    abs
    movl    %eax,%ebx
    popq    %rax
    mull    %ebx
    ret

Ix:
    movl    x2,%eax
    pushq   %rax
    movl    X2,%eax
    pushq   %rax
    call    min
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    X1,%eax
    pushq   %rax
    call    min
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    x1,%eax
    pushq   %rax
    call    min
    popq    %rdx
    popq    %rdx
    pushq   %rax

    movl    x2,%eax
    pushq   %rax
    movl    X2,%eax
    pushq   %rax
    call    max
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    X1,%eax
    pushq   %rax
    call    max
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    x1,%eax
    pushq   %rax
    call    max
    popq    %rdx
    popq    %rdx

    movl    %eax,%ebx
    popq    %rax
    subl    %ebx,%eax
    call    abs
    pushq   %rax

    movl    x2,%ebx
    movl    x1,%eax
    subl    %ebx,%eax
    call    abs

    movl    %eax,%ebx
    popq    %rax
    subl    %eax,%ebx
    pushq   %rbx

    movl    X2,%ebx
    movl    X1,%eax
    subl    %ebx,%eax
    call    abs
    popq    %rbx
    addl    %ebx,%eax
    ret

Iy:
    movl    y2,%eax
    pushq   %rax
    movl    Y2,%eax
    pushq   %rax
    call    min
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    Y1,%eax
    pushq   %rax
    call    min
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    y1,%eax
    pushq   %rax
    call    min
    popq    %rdx
    popq    %rdx
    pushq   %rax

    movl    y2,%eax
    pushq   %rax
    movl    Y2,%eax
    pushq   %rax
    call    max
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    Y1,%eax
    pushq   %rax
    call    max
    popq    %rdx
    popq    %rdx
    pushq   %rax
    movl    y1,%eax
    pushq   %rax
    call    max
    popq    %rdx
    popq    %rdx

    movl    %eax,%ebx
    popq    %rax
    subl    %ebx,%eax
    call    abs
    pushq   %rax

    movl    y2,%ebx
    movl    y1,%eax
    subl    %ebx,%eax
    call    abs

    movl    %eax,%ebx
    popq    %rax
    subl    %eax,%ebx
    pushq   %rbx

    movl    Y2,%ebx
    movl    Y1,%eax
    subl    %ebx,%eax
    call    abs
    popq    %rbx
    addl    %ebx,%eax
    ret
main:
    call    read
    call    Ix

    pushq   %rax
    cmpl    $0,%eax
    jle non_sub
    call    Iy
    cmpl    $0,%eax
    jle non_sub
    popq    %rbx

    mull    %ebx
    pushq   %rax
    call    square
    popq    %rbx
    subl    %ebx,%eax
    jmp end_main
non_sub:
    call    square

end_main:
    call    write
    movl    $0, %eax
    mov $1,%eax
    int $0x80
.data
format_out:
    .string "%d\n"
format_in:
    .string "%d"
Y2: .long   0
X2: .long   0
Y1: .long   0
X1: .long   0
y2: .long   0
x2: .long   0
y1: .long   0
x1: .long   0
ans:    .long   0