Move more stuff to hb-dsalgs.hh

1 files changed, 83 insertions, 0 deletions

diff --git a/src/hb-dsalgs.hh b/src/hb-dsalgs.hh
index 4eceeb2f..60cb0023 100644
--- a/src/hb-dsalgs.hh
+++ b/src/hb-dsalgs.hh
@@ -541,4 +541,87 @@ struct hb_bytes_t
 };
 
 
+struct HbOpOr
+{
+  static const bool passthru_left = true;
+  static const bool passthru_right = true;
+  template <typename T> static void process (T &o, const T &a, const T &b) { o = a | b; }
+};
+struct HbOpAnd
+{
+  static const bool passthru_left = false;
+  static const bool passthru_right = false;
+  template <typename T> static void process (T &o, const T &a, const T &b) { o = a & b; }
+};
+struct HbOpMinus
+{
+  static const bool passthru_left = true;
+  static const bool passthru_right = false;
+  template <typename T> static void process (T &o, const T &a, const T &b) { o = a & ~b; }
+};
+struct HbOpXor
+{
+  static const bool passthru_left = true;
+  static const bool passthru_right = true;
+  template <typename T> static void process (T &o, const T &a, const T &b) { o = a ^ b; }
+};
+
+
+/* Compiler-assisted vectorization. */
+
+/* Type behaving similar to vectorized vars defined using __attribute__((vector_size(...))),
+ * using vectorized operations if HB_VECTOR_SIZE is set to **bit** numbers (eg 128).
+ * Define that to 0 to disable. */
+template <typename elt_t, unsigned int byte_size>
+struct hb_vector_size_t
+{
+  elt_t& operator [] (unsigned int i) { return u.v[i]; }
+  const elt_t& operator [] (unsigned int i) const { return u.v[i]; }
+
+  template <class Op>
+  inline hb_vector_size_t process (const hb_vector_size_t &o) const
+  {
+    hb_vector_size_t r;
+#if HB_VECTOR_SIZE
+    if (HB_VECTOR_SIZE && 0 == (byte_size * 8) % HB_VECTOR_SIZE)
+      for (unsigned int i = 0; i < ARRAY_LENGTH (u.vec); i++)
+	Op::process (r.u.vec[i], u.vec[i], o.u.vec[i]);
+    else
+#endif
+      for (unsigned int i = 0; i < ARRAY_LENGTH (u.v); i++)
+	Op::process (r.u.v[i], u.v[i], o.u.v[i]);
+    return r;
+  }
+  inline hb_vector_size_t operator | (const hb_vector_size_t &o) const
+  { return process<HbOpOr> (o); }
+  inline hb_vector_size_t operator & (const hb_vector_size_t &o) const
+  { return process<HbOpAnd> (o); }
+  inline hb_vector_size_t operator ^ (const hb_vector_size_t &o) const
+  { return process<HbOpXor> (o); }
+  inline hb_vector_size_t operator ~ () const
+  {
+    hb_vector_size_t r;
+#if HB_VECTOR_SIZE && 0
+    if (HB_VECTOR_SIZE && 0 == (byte_size * 8) % HB_VECTOR_SIZE)
+      for (unsigned int i = 0; i < ARRAY_LENGTH (u.vec); i++)
+	r.u.vec[i] = ~u.vec[i];
+    else
+#endif
+    for (unsigned int i = 0; i < ARRAY_LENGTH (u.v); i++)
+      r.u.v[i] = ~u.v[i];
+    return r;
+  }
+
+  private:
+  static_assert (byte_size / sizeof (elt_t) * sizeof (elt_t) == byte_size, "");
+  union {
+    elt_t v[byte_size / sizeof (elt_t)];
+#if HB_VECTOR_SIZE
+    typedef unsigned long vec_t __attribute__((vector_size (HB_VECTOR_SIZE / 8)));
+    vec_t vec[byte_size / sizeof (vec_t)];
+#endif
+  } u;
+};
+
+
 #endif /* HB_DSALGS_HH */