gcc-8.3/gcc/SET_TYPE_VECTOR_SUBPARTS()

参照元†

• gcc-8.3/gcc/make_vector_type()

説明†

• パス: gcc-8.3/gcc/tree.h

• FIXME: これは何？
  • 説明

引数†

• tree node
  • gcc-8.3/gcc/tree
• poly_uint64 subparts
  • gcc-8.3/gcc/poly_uint64

返り値†

• なし

参考†

実装†

/* Set the number of elements in VECTOR_TYPE NODE to SUBPARTS, which must
   satisfy valid_vector_subparts_p.  */

inline void
SET_TYPE_VECTOR_SUBPARTS (tree node, poly_uint64 subparts)
{
  STATIC_ASSERT (NUM_POLY_INT_COEFFS <= 2);
  unsigned HOST_WIDE_INT coeff0 = subparts.coeffs[0];
  int index = exact_log2 (coeff0);
  gcc_assert (index >= 0);

• • gcc-8.3/gcc/STATIC_ASSERT()
  • gcc-8.3/gcc/HOST_WIDE_INT
  • gcc-8.3/gcc/exact_log2()
  • gcc-8.3/gcc/gcc_assert()

  if (NUM_POLY_INT_COEFFS == 2)
    {
      unsigned HOST_WIDE_INT coeff1 = subparts.coeffs[1];
      gcc_assert (coeff1 == 0 || coeff1 == coeff0);
      VECTOR_TYPE_CHECK (node)->type_common.precision
	= index + (coeff1 != 0 ? 0x100 : 0);
    }
  else
    VECTOR_TYPE_CHECK (node)->type_common.precision = index;
}

• • gcc-8.3/gcc/VECTOR_TYPE_CHECK()

コメント†

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• katsuhiro

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