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UCT/IB/MLX5: Prevent compiler to use memmove - v1.16.x #9705

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Feb 21, 2024
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UCT/IB/MLX5: Prevent compiler to use memmove - v1.16.x #9705

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11 changes: 9 additions & 2 deletions src/uct/ib/mlx5/ib_mlx5.inl
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Original file line number Diff line number Diff line change
Expand Up @@ -508,8 +508,15 @@ 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)
UCS_WORD_COPY(int16x8_t, dst, int16x8_t, src, MLX5_SEND_WQE_BB);
#else /* NO SIMD support */
UCS_WORD_COPY(uint64_t, dst, uint64_t, src, MLX5_SEND_WQE_BB);
#else
typedef struct {
uint8_t data[MLX5_SEND_WQE_BB];
} UCS_S_PACKED uct_ib_mlx5_send_wqe_bb_t;

/* Prevent the compiler to replace by memmove() */
UCS_WORD_COPY(uct_ib_mlx5_send_wqe_bb_t, dst,
uct_ib_mlx5_send_wqe_bb_t, src,
MLX5_SEND_WQE_BB);
#endif
}

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