diff --git a/Cargo.lock b/Cargo.lock
index 733d92a45..a1b45678d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,7 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+version = 3
+
 [[package]]
 name = "blake2"
 version = "0.9.1"
@@ -239,9 +241,9 @@ dependencies = [
 
 [[package]]
 name = "sha1-asm"
-version = "0.4.4"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9dae2289dd5f5dc67fb0f341a5676c5c197415c51ce7345ae1bd0d36a6cbbfc"
+checksum = "563d4f7100bc3fce234e5f37bbf63dc2752558964505ba6ac3f7204bdc59eaac"
 dependencies = [
  "cc",
 ]
diff --git a/sha1/Cargo.toml b/sha1/Cargo.toml
index fc4d2f51f..fd34ee35b 100644
--- a/sha1/Cargo.toml
+++ b/sha1/Cargo.toml
@@ -19,9 +19,9 @@ digest = "0.9"
 block-buffer = "0.9"
 opaque-debug = "0.3"
 cfg-if = "1.0"
-sha1-asm = { version = "0.4", optional = true }
+sha1-asm = { version = "0.5", optional = true }
 
-[target.'cfg(any(target_arch = "aarch64", target_arch = "x86_64", target_arch = "x86"))'.dependencies]
+[target.'cfg(any(target_arch = "aarch64", target_arch = "x86", target_arch = "x86_64"))'.dependencies]
 cpufeatures = "0.1.5"
 
 [dev-dependencies]
diff --git a/sha1/src/compress.rs b/sha1/src/compress.rs
index 09f24f1f0..b45f87bc2 100644
--- a/sha1/src/compress.rs
+++ b/sha1/src/compress.rs
@@ -15,9 +15,7 @@ cfg_if::cfg_if! {
         #[cfg(feature = "asm")]
         mod soft {
             pub(crate) fn compress(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
-                for block in blocks {
-                    sha1_asm::compress(state, block);
-                }
+                sha1_asm::compress(state, blocks)
             }
         }
         mod x86;
diff --git a/sha1/src/compress/aarch64.rs b/sha1/src/compress/aarch64.rs
index 4edd588ef..5952d1f62 100644
--- a/sha1/src/compress/aarch64.rs
+++ b/sha1/src/compress/aarch64.rs
@@ -1,19 +1,17 @@
 //! SHA-1 `aarch64` backend.
 
-/// Per rustc target feature docs for `aarch64-unknown-linux-gnu` and
-/// `aarch64-apple-darwin` platforms, the `sha2` target feature enables
-/// SHA-1 as well:
-///
-/// > Enable SHA1 and SHA256 support.
-cpufeatures::new!(sha2_hwcap, "sha2");
+// Per rustc target feature docs for `aarch64-unknown-linux-gnu` and
+// `aarch64-apple-darwin` platforms, the `sha2` target feature enables
+// SHA-1 as well:
+//
+// > Enable SHA1 and SHA256 support.
+cpufeatures::new!(sha1_hwcap, "sha2");
 
-pub fn compress(state: &mut [u32; 5], blocks: &[u8; 64]) {
+pub fn compress(state: &mut [u32; 5], blocks: &[[u8; 64]]) {
     // TODO: Replace with https://github.com/rust-lang/rfcs/pull/2725
     // after stabilization
-    if sha2_hwcap::get() {
-        for block in blocks {
-            sha1_asm::compress(state, block);
-        }
+    if sha1_hwcap::get() {
+        sha1_asm::compress(state, blocks);
     } else {
         super::soft::compress(state, blocks);
     }
diff --git a/sha1/src/consts.rs b/sha1/src/consts.rs
index 277576ac9..c227df3a9 100644
--- a/sha1/src/consts.rs
+++ b/sha1/src/consts.rs
@@ -1,17 +1,12 @@
-#![allow(clippy::unreadable_literal)]
+#![allow(clippy::unreadable_literal, dead_code)]
 
 pub const STATE_LEN: usize = 5;
 
-#[cfg(any(not(feature = "asm"), feature = "asm-aarch64"))]
 pub const BLOCK_LEN: usize = 16;
 
-#[cfg(any(not(feature = "asm"), feature = "asm-aarch64"))]
 pub const K0: u32 = 0x5A827999u32;
-#[cfg(any(not(feature = "asm"), feature = "asm-aarch64"))]
 pub const K1: u32 = 0x6ED9EBA1u32;
-#[cfg(any(not(feature = "asm"), feature = "asm-aarch64"))]
 pub const K2: u32 = 0x8F1BBCDCu32;
-#[cfg(any(not(feature = "asm"), feature = "asm-aarch64"))]
 pub const K3: u32 = 0xCA62C1D6u32;
 
 pub const H: [u32; STATE_LEN] = [0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0];