cmov v0.4.5

cmov/CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 0.4.5 (2026-01-15)
+### Changed
+- Introduce small ARM32 `asm!` optimization which also guarantees constant-time operation ([#1336], [#1346])
+
+[#1336]: https://github.com/RustCrypto/utils/pull/1336
+[#1346]: https://github.com/RustCrypto/utils/pull/1346
+
 ## 0.4.4 (2026-01-14)
 ### Security
 - Fix non-constant-time assembly being emitted from portable backend on `thumbv6m-none-eabi` ([#1332])

cmov/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cmov"
-version = "0.4.4"
+version = "0.4.5"
 authors = ["RustCrypto Developers"]
 edition = "2024"
 rust-version = "1.85"
@@ -11,9 +11,9 @@ license = "Apache-2.0 OR MIT"
 keywords = ["constant-time", "crypto", "intrinsics"]
 categories = ["cryptography", "hardware-support", "no-std"]
 description = """
-Conditional move CPU intrinsics which are guaranteed on major platforms to execute in constant-time
-and not be rewritten as branches by the compiler. Provides wrappers for the CMOV family of
-instructions on x86/x86_64 and CSEL on AArch64, along with a portable "best-effort" fallback.
+Conditional move CPU intrinsics which are guaranteed on major platforms (ARM32/ARM64, x86/x86_64) to execute in
+constant-time and not be rewritten as branches by the compiler. Provides wrappers for the CMOV family of
+instructions on x86/x86_64 and CSEL on AArch64, along with a portable "best-effort" pure Rust fallback.
 """
 
 [dev-dependencies]

cmov/src/portable.rs

@@ -156,7 +156,7 @@ fn masknz32(condition: u32) -> u32 {
 fn masknz64(condition: u64) -> u64 {
     let lo = masknz32((condition & 0xFFFF_FFFF) as u32);
     let hi = masknz32((condition >> 32) as u32);
-    let mask = (lo | hi) as u64;
+    let mask = u64::from(lo | hi);
     mask | mask << 32
 }