Add new constant data structure.

[thirdparty/gcc.git] / gcc / config / rs6000 / rs6000-protos.h

diff --git a/gcc/config/rs6000/rs6000-protos.h b/gcc/config/rs6000/rs6000-protos.h
index c01ae005d0bef91cf10ee655bdc0cbb2cfbc413f..81345d80952885aedd9ef8e86d33a36e969ec5eb 100644 (file)
--- a/gcc/config/rs6000/rs6000-protos.h
+++ b/gcc/config/rs6000/rs6000-protos.h
@@ -222,6 +222,34 @@ address_is_prefixed (rtx addr,
   return (iform == INSN_FORM_PREFIXED_NUMERIC
          || iform == INSN_FORM_PCREL_LOCAL);
 }
+
+/* Functions and data structures relating to 128-bit constants that are
+   converted to byte, half-word, word, and double-word values.  All fields are
+   kept in big endian order.  We also convert scalar values to 128-bits if they
+   are going to be loaded into vector registers.  */
+#define VECTOR_128BIT_BITS             128
+#define VECTOR_128BIT_BYTES            (128 / 8)
+#define VECTOR_128BIT_HALF_WORDS       (128 / 16)
+#define VECTOR_128BIT_WORDS            (128 / 32)
+#define VECTOR_128BIT_DOUBLE_WORDS     (128 / 64)
+
+typedef struct {
+  /* Constant as various sized items.  */
+  unsigned HOST_WIDE_INT double_words[VECTOR_128BIT_DOUBLE_WORDS];
+  unsigned int words[VECTOR_128BIT_WORDS];
+  unsigned short half_words[VECTOR_128BIT_HALF_WORDS];
+  unsigned char bytes[VECTOR_128BIT_BYTES];
+
+  unsigned original_size;              /* Constant size before splat.  */
+  bool fp_constant_p;                  /* Is the constant floating point?  */
+  bool all_double_words_same;          /* Are the double words all equal?  */
+  bool all_words_same;                 /* Are the words all equal?  */
+  bool all_half_words_same;            /* Are the half words all equal?  */
+  bool all_bytes_same;                 /* Are the bytes all equal?  */
+} vec_const_128bit_type;
+
+extern bool vec_const_128bit_to_bytes (rtx, machine_mode,
+                                      vec_const_128bit_type *);
 #endif /* RTX_CODE */
 
 #ifdef TREE_CODE