In expmed.c: extract_bit_field_1() I see the following:
/* On big-endian machines, we count bits from the most significant.
If the bit field insn does not, we must invert. */
if (BITS_BIG_ENDIAN != BYTES_BIG_ENDIAN)
xbitpos = unit - bitsize - xbitpos;
This produces a negative value for xbitpos for BIG_ENDIAN code, despite
the fact that xbitpos is declared unsigned. The code in alpha/alpha.md
that it calls promptly converts the bit offset back to its original
value, and I have to do the same for my own BIG_ENDIAN port.
This smells like a bug, although I suspect changing it would break
existing ports.
Thoughts?
--jeff
