total_bits = GET_MODE_BITSIZE (mode);
+ /* Make sure bitpos is valid for the chosen mode. Adjust BITPOS to
+ be be in the range 0 to total_bits-1, and put any excess bytes in
+ OFFSET. */
+ if (bitpos >= total_bits)
+ {
+ offset += (bitpos / total_bits) * (total_bits / BITS_PER_UNIT);
+ bitpos -= ((bitpos / total_bits) * (total_bits / BITS_PER_UNIT)
+ * BITS_PER_UNIT);
+ }
+
/* Get ref to an aligned byte, halfword, or word containing the field.
Adjust BITPOS to be position within a word,
and OFFSET to be the offset of that word.