aes: use core::arch::aarch64::vst1q_u8 intrinsic on armv8 (#280)

It previously wasn't mapped, but it is now:

https://doc.rust-lang.org/core/arch/aarch64/fn.vst1q_u8.html

aes/src/armv8.rs

@@ -172,17 +172,9 @@ define_aes_impl!(Aes128, Aes128Enc, Aes128Dec, U16, 11, "AES-128");
 define_aes_impl!(Aes192, Aes192Enc, Aes192Dec, U24, 13, "AES-192");
 define_aes_impl!(Aes256, Aes256Enc, Aes256Dec, U32, 15, "AES-256");
 
-// TODO(tarcieri): use `stdarch` intrinsic for this when it becomes available
-#[inline(always)]
-unsafe fn vst1q_u8(dst: *mut u8, src: uint8x16_t) {
-    dst.copy_from_nonoverlapping(&src as *const _ as *const u8, 16);
-}
-
 #[cfg(test)]
 mod tests {
-    use super::{
-        decrypt, decrypt8, encrypt, encrypt8, expand_key, inv_expanded_keys, vst1q_u8, ParBlocks,
-    };
+    use super::{decrypt, decrypt8, encrypt, encrypt8, expand_key, inv_expanded_keys, ParBlocks};
     use core::{arch::aarch64::*, convert::TryInto};
     use hex_literal::hex;
 

aes/src/armv8/decrypt.rs

@@ -1,6 +1,5 @@
 //! AES decryption support.
 
-use super::vst1q_u8;
 use crate::{Block, ParBlocks};
 use core::arch::aarch64::*;
 

aes/src/armv8/encrypt.rs

@@ -1,6 +1,5 @@
 //! AES encryption support
 
-use super::vst1q_u8;
 use crate::{Block, ParBlocks};
 use core::arch::aarch64::*;
 

aes/src/armv8/hazmat.rs

@@ -4,7 +4,6 @@
 //! implementations in this crate, but instead provides raw AES-NI accelerated
 //! access to the AES round function gated under the `hazmat` crate feature.
 
-use super::vst1q_u8;
 use crate::{Block, ParBlocks};
 use core::arch::aarch64::*;