28 lines
454 B
NASM
28 lines
454 B
NASM
section .text
|
|
bits 64
|
|
|
|
; Performs compare and swap
|
|
; ARGS:
|
|
; 1 int32*: target ptr
|
|
; 2 int32: old value
|
|
; 3 int32: new value
|
|
; RETURNS uint32 value read
|
|
global cmp_swp_32
|
|
cmp_swp_32:
|
|
mov eax, esi
|
|
lock cmpxchg dword [rdi], edx
|
|
ret
|
|
|
|
; Performs fetch and add
|
|
; ARGS:
|
|
; 1 int32*: target ptr
|
|
; 2 int32: increment value
|
|
; 3 int32: new value
|
|
; RETURNS uint32 value read
|
|
global fetch_add_32:
|
|
fetch_add_32:
|
|
lock xadd dword [rdi], esi
|
|
xor rax, rax
|
|
mov eax, esi
|
|
ret
|