__may_alias__ Class — pytorch Architecture

Source Code

aten/src/ATen/cpu/vec/vec256/vsx/vec256_float_vsx.h lines 16–66

template <>
class Vectorized<float> {
 private:
  union {
    struct {
      vfloat32 _vec0;
      vfloat32 _vec1;
    };
    struct {
      vbool32 _vecb0;
      vbool32 _vecb1;
    };

  } __attribute__((__may_alias__));

 public:
  using value_type = float;
  using vec_internal_type = vfloat32;
  using vec_internal_mask_type = vbool32;
  using size_type = int;

  static constexpr size_type size() {
    return 8;
  }
  Vectorized() {}

  C10_ALWAYS_INLINE Vectorized(vfloat32 v) : _vec0{v}, _vec1{v} {}
  C10_ALWAYS_INLINE Vectorized(vbool32 vmask) : _vecb0{vmask}, _vecb1{vmask} {}
  C10_ALWAYS_INLINE Vectorized(vfloat32 v1, vfloat32 v2)
      : _vec0{v1}, _vec1{v2} {}
  C10_ALWAYS_INLINE Vectorized(vbool32 v1, vbool32 v2)
      : _vecb0{v1}, _vecb1{v2} {}
  C10_ALWAYS_INLINE Vectorized(float scalar)
      : _vec0{vec_splats(scalar)}, _vec1{vec_splats(scalar)} {}
  C10_ALWAYS_INLINE Vectorized(
      float scalar1,
      float scalar2,
      float scalar3,
      float scalar4,
      float scalar5,
      float scalar6,
      float scalar7,
      float scalar8)
      : _vec0{vfloat32{scalar1, scalar2, scalar3, scalar4}},
        _vec1{vfloat32{scalar5, scalar6, scalar7, scalar8}} {}
  C10_ALWAYS_INLINE const vec_internal_type& vec0() const {
    return _vec0;
  }
  C10_ALWAYS_INLINE const vec_internal_type& vec1() const {
    return _vec1;
  }