Try double

.github/workflows/build.yml

@@ -79,23 +79,3 @@ jobs:
         shell: cmd
       - if: ${{ failure() }}
         run: cat regression.diffs
-  i386:
-    runs-on: ubuntu-latest
-    container:
-      image: debian:11
-      options: --platform linux/386
-    steps:
-      - run: apt-get update && apt-get install -y build-essential git libipc-run-perl postgresql-13 postgresql-server-dev-13 sudo
-      - run: service postgresql start
-      - run: |
-          git clone https://github.com/${{ github.repository }}.git pgvector
-          cd pgvector
-          git fetch origin ${{ github.ref }}
-          git reset --hard FETCH_HEAD
-          make
-          make install
-          chown -R postgres .
-          sudo -u postgres make installcheck
-          sudo -u postgres make prove_installcheck
-        env:
-          PG_CFLAGS: -Wall -Wextra -Werror -Wno-unused-parameter -Wno-sign-compare

src/vector.c

@@ -755,7 +755,6 @@ normalize_l2(PG_FUNCTION_ARGS)
 	Vector	   *a = PG_GETARG_VECTOR_P(0);
 	float	   *ax = a->x;
 	double		norm = 0.0;
-	float		normf;
 	Vector	   *result;
 	float	   *rx;
 
@@ -767,13 +766,12 @@ normalize_l2(PG_FUNCTION_ARGS)
 		norm += (double) ax[i] * (double) ax[i];
 
 	norm = sqrt(norm);
-	normf = (float) norm;
 
-	if (normf > 0)
+	if (norm > 0)
 	{
 		/* Auto-vectorized */
 		for (int i = 0, imax = a->dim; i < imax; i++)
-			rx[i] = ax[i] / normf;
+			rx[i] = ax[i] / norm;
 
 		/* Check for overflow */
 		for (int i = 0, imax = a->dim; i < imax; i++)