message: core(SIMD): fix MSA build - add v_reduce_min/max for u8/s8
diff: @@ -1000,6 +1000,22 @@ OPENCV_HAL_IMPL_MSA_REDUCE_OP_4(v_int32x4, int, min, std::min)
  OPENCV_HAL_IMPL_MSA_REDUCE_OP_4(v_float32x4, float, max, std::max)
  OPENCV_HAL_IMPL_MSA_REDUCE_OP_4(v_float32x4, float, min, std::min)
  +
  +#define OPENCV_HAL_IMPL_MSA_REDUCE_OP_16(_Tpvec, scalartype, _Tpvec2, func) \
  +inline scalartype v_reduce_##func(const _Tpvec& a) \
  +{ \
  + _Tpvec2 a1, a2; \
  + v_expand(a, a1, a2); \
  + return (scalartype)v_reduce_##func(v_##func(a1, a2)); \
  +}
  +
  +OPENCV_HAL_IMPL_MSA_REDUCE_OP_16(v_uint8x16, uchar, v_uint16x8, min)
  +OPENCV_HAL_IMPL_MSA_REDUCE_OP_16(v_uint8x16, uchar, v_uint16x8, max)
  +OPENCV_HAL_IMPL_MSA_REDUCE_OP_16(v_int8x16, char, v_int16x8, min)
  +OPENCV_HAL_IMPL_MSA_REDUCE_OP_16(v_int8x16, char, v_int16x8, max)
  +
  +
  +
  #define OPENCV_HAL_IMPL_MSA_REDUCE_SUM(_Tpvec, scalartype, suffix) \
  inline scalartype v_reduce_sum(const _Tpvec& a) \
  { \
  