.intel_syntax noprefix

.text
.globl nub_memcpy
# func nub_memcpy(destination: ^u8, source: ^u8, count: u64): ^u8
nub_memcpy:
    mov rcx, rdx
    rep movsb

.text
.globl nub_memset
# func nub_memset(destination: ^u8, value: i8, count: u64): ^u8
nub_memset:
    push rdi
    mov rcx, rdx
    mov al, sil
    test rcx, rcx
    jz memset_done
memset_loop:
    mov BYTE PTR [rdi], al
    inc rdi
    dec rcx
    jnz memset_loop
memset_done:
    pop rax
    ret