Rust 1.89 baseline

.github/workflows/tests.yml

@@ -12,8 +12,7 @@ jobs:
       matrix:
         os: [ubuntu-22.04-arm, ubuntu-24.04-arm, macos-14, macos-15, macos-26, macos-latest, windows-11-arm]
         rust-toolchain:
-          - "1.81" # minimum for this crate
-          - "1.89" # when AVX-512 VPCLMULQDQ was stabilized
+          - "1.89" # minimum for this crate, when AVX-512 VPCLMULQDQ was stabilized
           - "stable"
           - "nightly"
     runs-on: ${{ matrix.os }}
@@ -43,8 +42,7 @@ jobs:
       matrix:
         os: [ ubuntu-latest, ubuntu-22.04, ubuntu-24.04, macos-15-intel, windows-2022, windows-2025, windows-latest ]
         rust-toolchain:
-          - "1.81" # minimum for this crate
-          - "1.89" # when AVX-512 VPCLMULQDQ was stabilized
+          - "1.89" # minimum for this crate, when AVX-512 VPCLMULQDQ was stabilized
           - "stable"
           - "nightly"
     runs-on: ${{ matrix.os }}
@@ -75,8 +73,7 @@ jobs:
       matrix:
         target: [i586-unknown-linux-gnu, i686-unknown-linux-gnu]
         rust-toolchain:
-          - "1.81" # minimum for this crate
-          - "1.89" # when AVX-512 VPCLMULQDQ was stabilized
+          - "1.89" # minimum for this crate, when AVX-512 VPCLMULQDQ was stabilized
           - "stable"
           - "nightly"
     steps:
@@ -101,8 +98,7 @@ jobs:
       matrix:
         target: [powerpc-unknown-linux-gnu, powerpc64-unknown-linux-gnu]
         rust-toolchain:
-          - "1.81" # minimum for this crate
-          - "1.89" # when AVX-512 VPCLMULQDQ was stabilized
+          - "1.89" # minimum for this crate, when AVX-512 VPCLMULQDQ was stabilized
           - "stable"
           - "nightly"
     steps:

Cargo.toml

@@ -14,7 +14,7 @@ readme = "README.md"
 # 1.69.0 added VPCLMULQDQ x86 detection support
 # 1.70.0 added LLVM 16 which supports PMULL2 on Aarch64
 # 1.89.0 stabilized AVX-512 intrinsics, including VPCLMULQDQ
-rust-version = "1.81"
+rust-version = "1.89"
 
 [lib]
 name = "crc_fast"
@@ -25,12 +25,6 @@ bench = true
 crc = "3"
 digest = {  version = "0.10", features = ["alloc"] }
 
-# will be removed once Rust 1.89 is the minimum supported version
-rustversion = "1.0"
-
-# constrain indexmap (transitive) to a version compatible with Rust 1.81.0
-indexmap = { version = ">=2.11.0, <2.12.0", optional = true }
-
 [dev-dependencies]
 criterion = "0.7"
 cbindgen = "0.29"

src/arch/mod.rs

@@ -85,11 +85,10 @@ unsafe fn update_aarch64_aes_sha3(
     }
 }
 
-/// Main entry point for x86/x86_64 (Rust 1.89+ which supports AVX-512)
+/// Main entry point for x86/x86_64
 ///
 /// # Safety
 /// May use native CPU features
-#[rustversion::since(1.89)]
 #[inline(always)]
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 pub(crate) unsafe fn update(state: u64, bytes: &[u8], params: CrcParams) -> u64 {
@@ -117,26 +116,6 @@ pub(crate) unsafe fn update(state: u64, bytes: &[u8], params: CrcParams) -> u64
     }
 }
 
-/// Main entry point for x86/x86_64 (Rust < 1.89 with no AVX-512 support)
-///
-/// # Safety
-/// May use native CPU features
-#[rustversion::before(1.89)]
-#[inline(always)]
-#[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
-pub(crate) unsafe fn update(state: u64, bytes: &[u8], params: CrcParams) -> u64 {
-    use crate::feature_detection::{get_arch_ops, ArchOpsInstance};
-
-    match get_arch_ops() {
-        ArchOpsInstance::X86SsePclmulqdq(ops) => match params.width {
-            64 => algorithm::update::<_, Width64>(state, bytes, params, ops),
-            32 => algorithm::update::<_, Width32>(state as u32, bytes, params, ops) as u64,
-            _ => panic!("Unsupported CRC width: {}", params.width),
-        },
-        ArchOpsInstance::SoftwareFallback => crate::arch::software::update(state, bytes, params),
-    }
-}
-
 #[inline]
 #[cfg(all(
     not(target_arch = "x86"),