UCT/IB/MLX5: Prevent compiler to use memmove

openucx · Feb 16, 2024 · 074160b · 074160b
1 parent 089203d
commit 074160b
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/src/uct/ib/mlx5/ib_mlx5.inl b/src/uct/ib/mlx5/ib_mlx5.inl
@@ -508,8 +508,9 @@ static UCS_F_ALWAYS_INLINE void uct_ib_mlx5_bf_copy_bb(void * restrict dst,
     UCS_WORD_COPY(__m128i, dst, __m128i, src, MLX5_SEND_WQE_BB);
 #elif defined(__ARM_NEON)
     vst4q_u64(dst, vld4q_u64(src));
-#else /* NO SIMD support */
-    UCS_WORD_COPY(uint64_t, dst, uint64_t, src, MLX5_SEND_WQE_BB);
+#else
+    /* Prevent the compiler to replace by memmove() */
+    *(uct_ib_mlx5_wqe_ctrl_seg_t *)dst = *(uct_ib_mlx5_wqe_ctrl_seg_t *)src;
 #endif
 }