#+build amd64 package simd_x86 import "base:intrinsics" cmpxchg16b :: #force_inline proc "c" (dst: ^u128, old, new: u128, $success, $failure: intrinsics.Atomic_Memory_Order) -> (val: u128) { return intrinsics.atomic_compare_exchange_strong_explicit(dst, old, new, success, failure) }