c2nasm with -O0 and -O3

----------------------------------------------------------
C:
----------------------------------------------------------
//-Wall -Wextra -Wpedantic -Wshadow -Wconversion
#include <stdio.h>
#include <stdlib.h>
#include <time.h>

int main()
{
    srand((unsigned int)time(NULL));
    int r_1 = rand();
    printf("(1a) %d\n", r_1);
    int last_two_1 = abs(r_1 % 100);
    printf("(1b) %02d\n", last_two_1);
    int r_2 = rand();
    printf("(2a) %d\n", r_2);
    int last_two_2 = abs(r_2 % 100);
    printf("(2b) %02d\n", last_two_2);

    int limit = (last_two_1 > last_two_2) ? last_two_2 : last_two_1;

    int line_length = 0;

    for (int i = 1; i <= limit; ++i)
    {
        int printed = printf("%d ", i);
        line_length += printed;

        if (line_length >= 80)
        {
            printf("\n");
            line_length = 0;
        }
    }

    putchar('\n');

    return 0;
}

----------------------------------------------------------
c2nasm -O0
----------------------------------------------------------
default rel

global main

extern putchar
extern printf
extern rand
extern srand
extern time


SECTION .text    exec

main:
        endbr64
        push    rbp
        mov     rbp, rsp
        sub     rsp, 32
        mov     edi, 0
        call    time
        mov     edi, eax
        call    srand
        call    rand
        mov     dword [rbp-18H], eax
        mov     eax, dword [rbp-18H]
        mov     esi, eax
        lea     rax, [rel L_004]
        mov     rdi, rax
        mov     eax, 0
        call    printf
        mov     edx, dword [rbp-18H]
        movsxd  rax, edx
        imul    rax, rax, 1374389535
        shr     rax, 32
        sar     eax, 5
        mov     ecx, edx
        sar     ecx, 31
        sub     eax, ecx
        imul    ecx, eax, 100
        mov     eax, edx
        sub     eax, ecx
        mov     edx, eax
        neg     edx
        cmovns  eax, edx
        mov     dword [rbp-14H], eax
        mov     eax, dword [rbp-14H]
        mov     esi, eax
        lea     rax, [rel L_005]
        mov     rdi, rax
        mov     eax, 0
        call    printf
        call    rand
        mov     dword [rbp-10H], eax
        mov     eax, dword [rbp-10H]
        mov     esi, eax
        lea     rax, [rel L_006]
        mov     rdi, rax
        mov     eax, 0
        call    printf
        mov     edx, dword [rbp-10H]
        movsxd  rax, edx
        imul    rax, rax, 1374389535
        shr     rax, 32
        sar     eax, 5
        mov     ecx, edx
        sar     ecx, 31
        sub     eax, ecx
        imul    ecx, eax, 100
        mov     eax, edx
        sub     eax, ecx
        mov     edx, eax
        neg     edx
        cmovns  eax, edx
        mov     dword [rbp-0CH], eax
        mov     eax, dword [rbp-0CH]
        mov     esi, eax
        lea     rax, [rel L_007]
        mov     rdi, rax
        mov     eax, 0
        call    printf
        mov     edx, dword [rbp-14H]
        mov     eax, dword [rbp-0CH]
        cmp     edx, eax
        cmovle  eax, edx
        mov     dword [rbp-8H], eax
        mov     dword [rbp-20H], 0
        mov     dword [rbp-1CH], 1
        jmp     L_003

L_001:  mov     eax, dword [rbp-1CH]
        mov     esi, eax
        lea     rax, [rel L_008]
        mov     rdi, rax
        mov     eax, 0
        call    printf
        mov     dword [rbp-4H], eax
        mov     eax, dword [rbp-4H]
        add     dword [rbp-20H], eax
        cmp     dword [rbp-20H], 79
        jle     L_002
        mov     edi, 10
        call    putchar
        mov     dword [rbp-20H], 0
L_002:  add     dword [rbp-1CH], 1
L_003:  mov     eax, dword [rbp-1CH]
        cmp     eax, dword [rbp-8H]
        jle     L_001
        mov     edi, 10
        call    putchar
        mov     eax, 0
        leave
        ret

SECTION .data    noexec


SECTION .bss     noexec


SECTION .rodata  noexec

L_004:
        db 28H, 31H, 61H, 29H, 20H, 25H, 64H, 0AH
        db 00H

L_005:
        db 28H, 31H, 62H, 29H, 20H, 25H, 30H, 32H
        db 64H, 0AH, 00H

L_006:
        db 28H, 32H, 61H, 29H, 20H, 25H, 64H, 0AH
        db 00H

L_007:
        db 28H, 32H, 62H, 29H, 20H, 25H, 30H, 32H
        db 64H, 0AH, 00H

L_008:
        db 25H, 64H, 20H, 00H


SECTION .note.gnu.property  noexec

        db 04H, 00H, 00H, 00H, 10H, 00H, 00H, 00H
        db 05H, 00H, 00H, 00H, 47H, 4EH, 55H, 00H
        db 02H, 00H, 00H, 0C0H, 04H, 00H, 00H, 00H
        db 03H, 00H, 00H, 00H, 00H, 00H, 00H, 00H

----------------------------------------------------------
c2nasm -O3
----------------------------------------------------------
default rel

global main

extern putc
extern stdout
extern putchar
extern __printf_chk
extern rand
extern srand
extern time


SECTION .text    exec


SECTION .data    noexec


SECTION .bss     noexec


SECTION .rodata.str1.1  noexec

.LC0:
        db 28H, 31H, 61H, 29H, 20H, 25H, 64H, 0AH
        db 00H

.LC1:
        db 28H, 31H, 62H, 29H, 20H, 25H, 30H, 32H
        db 64H, 0AH, 00H

.LC2:
        db 28H, 32H, 61H, 29H, 20H, 25H, 64H, 0AH
        db 00H

.LC3:
        db 28H, 32H, 62H, 29H, 20H, 25H, 30H, 32H
        db 64H, 0AH, 00H

.LC4:
        db 25H, 64H, 20H, 00H


SECTION .text.startup  exec

main:
        endbr64
        push    r13
        xor     edi, edi
        push    r12
        push    rbp
        push    rbx
        sub     rsp, 8
        call    time
        mov     edi, eax
        call    srand
        call    rand
        lea     rsi, [rel .LC0]
        mov     edi, 2
        mov     ebx, eax
        mov     edx, eax
        xor     eax, eax
        call    __printf_chk
        movsxd  rax, ebx
        mov     edx, ebx
        mov     edi, 2
        imul    rax, rax, 1374389535
        sar     edx, 31
        lea     rsi, [rel .LC1]
        sar     rax, 37
        sub     eax, edx
        imul    eax, eax, 100
        sub     ebx, eax
        mov     r12d, ebx
        neg     r12d
        cmovs   r12d, ebx
        xor     eax, eax
        mov     edx, r12d
        call    __printf_chk
        call    rand
        lea     rsi, [rel .LC2]
        mov     edi, 2
        mov     ebx, eax
        mov     edx, eax
        xor     eax, eax
        call    __printf_chk
        movsxd  rax, ebx
        mov     edx, ebx
        mov     edi, 2
        imul    rax, rax, 1374389535
        sar     edx, 31
        lea     rsi, [rel .LC3]
        sar     rax, 37
        sub     eax, edx
        imul    eax, eax, 100
        sub     ebx, eax
        mov     eax, ebx
        neg     eax
        cmovns  ebx, eax
        xor     eax, eax
        mov     edx, ebx
        call    __printf_chk
        cmp     r12d, ebx
        cmovg   r12d, ebx
        test    r12d, r12d
        jz      L_003
        add     r12d, 1
        mov     ebx, 1
        xor     ebp, ebp
        lea     r13, [rel .LC4]
        jmp     L_002

ALIGN   8
L_001:  add     ebx, 1
        cmp     ebx, r12d
        jz      L_003
L_002:  mov     edx, ebx
        mov     rsi, r13
        mov     edi, 2
        xor     eax, eax
        call    __printf_chk
        add     ebp, eax
        cmp     ebp, 79
        jle     L_001
        mov     edi, 10
        add     ebx, 1
        xor     ebp, ebp
        call    putchar
        cmp     ebx, r12d
        jnz     L_002
L_003:  mov     rsi, qword [rel stdout]
        mov     edi, 10
        call    putc
        add     rsp, 8
        xor     eax, eax
        pop     rbx
        pop     rbp
        pop     r12
        pop     r13
        ret



SECTION .note.gnu.property  noexec

        db 04H, 00H, 00H, 00H, 10H, 00H, 00H, 00H
        db 05H, 00H, 00H, 00H, 47H, 4EH, 55H, 00H
        db 02H, 00H, 00H, 0C0H, 04H, 00H, 00H, 00H
        db 03H, 00H, 00H, 00H, 00H, 00H, 00H, 00H

----------------------------------------------------------
Changes to compile -O3 with NASM
----------------------------------------------------------
.LC0: -> main.LC0:
.LC1: -> main.LC1:
.LC2: -> main.LC2:
.LC3: -> main.LC3:
.LC4: -> main.LC4: