memory_access_balljugglery_part2

format ELF64
public copy_aligned
public copy_unaligned
public copy_aligned_nontemporal
public copy_naive

section '.text' executable align 16

;RDI = dest
;RSI = source
;RDX = bytes

copy_aligned:

mov rcx, rdx
shr rcx, 4

align 16
copy_aligned_loop:

movaps xmm0, [rsi]
movaps [rdi], xmm0
add rsi, 16
add rdi, 16

loop copy_aligned_loop
ret


copy_aligned_nontemporal:

mov rcx, rdx
shr rcx, 4

align 16
copy_aligned_nontemporal_loop:

movaps xmm0, [rsi]
movntps [rdi], xmm0
add rsi, 16
add rdi, 16

loop copy_aligned_nontemporal_loop
ret


copy_unaligned:

mov rcx, rdx
shr rcx, 4

align 16
copy_unaligned_loop:

movups xmm0, [rsi]
movups [rdi], xmm0
add rsi, 16
add rdi, 16

loop copy_unaligned_loop
ret


copy_naive:

mov rcx, rdx

rep movsb
ret