gistfile1.asm

global _main
extern _printf
extern _exit
extern _pthread_create
extern _pthread_exit
extern _pthread_join

%define WORKERS 4

worker:
    and rsp, ~15
    mov rax, rdi
    .loop:
        add rdi, WORKERS
        cmp rdi, 100000000
        jg .end
        add rax, rdi
        jmp .loop
    .end
    mov rdi, rax
    call _pthread_exit

fmt: db "%ld", 10, 0

_main:
    and rsp, ~15

    xor rbx, rbx
    .spawn_workers:
        mov rdi, rbx
        sal rdi, 4
        mov rsi, threads
        add rdi, rsi
        xor rsi, rsi
        mov rdx, worker
        mov rcx, rbx
        call _pthread_create
        inc rbx
        cmp rbx, WORKERS
        jl .spawn_workers
    
    xor rbx, rbx
    .join_workers:
        mov rdi, rbx
        sal rdi, 4
        mov rsi, threads
        add rdi, rsi
        mov rsi, rdi
        add rsi, 8
        mov rbp, rsi
        mov rdi, [rdi]
        call _pthread_join
        mov rax, [rbp]
        mov rsi, sum
        add [rsi], rax
        inc rbx
        cmp rbx, WORKERS
        jl .join_workers

    mov rdi, fmt
    mov rsi, sum
    mov rsi, [rsi]
    call _printf

    xor rdi, rdi
    call _exit

section .data
    sum: dq 0
    tmp: dq 0
    threads:
        times (WORKERS * 2) dq 0