From 46462cc99c24e9eb5d4abbcb3abc6e459e2a836b Mon Sep 17 00:00:00 2001
From: Darin Morrison <darinmorrison@gmail.com>
Date: Mon, 12 Feb 2024 10:41:14 -0700
Subject: [PATCH] Fix kuznyechik 32bit build (#406)

---
 .github/workflows/kuznyechik.yml | 32 ++++++++++++++++++++++++++++++++
 kuznyechik/src/sse2/backends.rs  |  4 ++++
 2 files changed, 36 insertions(+)

diff --git a/.github/workflows/kuznyechik.yml b/.github/workflows/kuznyechik.yml
index 00b97ba7..a77983ec 100644
--- a/.github/workflows/kuznyechik.yml
+++ b/.github/workflows/kuznyechik.yml
@@ -45,6 +45,38 @@ jobs:
     with:
         working-directory: ${{ github.workflow }}
 
+  sse2:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        rust:
+          - 1.65.0 # MSRV
+          - stable
+        target:
+          - i686-unknown-linux-gnu
+          - x86_64-unknown-linux-gnu
+        include:
+          - target: i686-unknown-linux-gnu
+            deps: sudo apt update && sudo apt install gcc-multilib
+    steps:
+      - uses: actions/checkout@v3
+      - uses: RustCrypto/actions/cargo-cache@master
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: ${{ matrix.rust }}
+          targets: ${{ matrix.target }}
+      - run: ${{ matrix.deps }}
+      - env:
+          RUSTFLAGS: "-Dwarnings -C target-feature=+sse2"
+        run: |
+          cargo test --target ${{ matrix.target }}
+          cargo test --target ${{ matrix.target }} --all-features
+      - env:
+          RUSTFLAGS: "-Dwarnings -C target-feature=+sse2 --cfg kuznyechik_force_soft"
+        run: |
+          cargo test --target ${{ matrix.target }}
+          cargo test --target ${{ matrix.target }} --all-features
+
   test:
     runs-on: ubuntu-latest
     strategy:
diff --git a/kuznyechik/src/sse2/backends.rs b/kuznyechik/src/sse2/backends.rs
index 541fdece..091c3691 100644
--- a/kuznyechik/src/sse2/backends.rs
+++ b/kuznyechik/src/sse2/backends.rs
@@ -9,6 +9,10 @@ use cipher::{
     typenum::Unsigned,
     BlockBackend, BlockSizeUser, ParBlocks, ParBlocksSizeUser,
 };
+
+#[cfg(target_arch = "x86")]
+use core::arch::x86::*;
+#[cfg(target_arch = "x86_64")]
 use core::arch::x86_64::*;
 
 pub(super) type RoundKeys = [__m128i; 10];