Switch Functions

Empty Function

void increment(short *array, short num) {
    for (int x = 0; x < num; x++) {
        array[x]++;
    }
}

int main(void) {
    short numbers[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
    increment(numbers, 9);

    return 1;
}

This generates the following assembly:

increment:
    push    rbp
    mov    rbp, rsp
    mov    QWORD PTR [rbp-24], rdi
    mov    eax, esi
    mov    WORD PTR [rbp-28], ax
    mov    DWORD PTR [rbp-4], 0
    jmp    .L2
.L3:
    mov    eax, DWORD PTR [rbp-4]
    cdqe
    lea    rdx, [rax+rax]
    mov    rax, QWORD PTR [rbp-24]
    add    rax, rdx
    movzx    edx, WORD PTR [rax]
    add    edx, 1
    mov    WORD PTR [rax], dx
    add    DWORD PTR [rbp-4], 1
.L2:
    movsx    eax, WORD PTR [rbp-28]
    cmp    eax, DWORD PTR [rbp-4]
    jg    .L3
    nop
    pop    rbp
    ret
    .size    increment, .-increment
    .globl    main
    .type    main, @function
main:
    push    rbp
    mov    rbp, rsp
    sub    rsp, 32
    mov    WORD PTR [rbp-32], 0
    mov    WORD PTR [rbp-30], 1
    mov    WORD PTR [rbp-28], 2
    mov    WORD PTR [rbp-26], 3
    mov    WORD PTR [rbp-24], 4
    mov    WORD PTR [rbp-22], 5
    mov    WORD PTR [rbp-20], 6
    mov    WORD PTR [rbp-18], 7
    mov    WORD PTR [rbp-16], 8
    lea    rax, [rbp-32]
    mov    esi, 9
    mov    rdi, rax
    call    increment
    mov    eax, 1
    leave
    ret