On Fri, Sep 03, 2004 at 08:05:15AM +0100, Richard Sandiford wrote:
> However, on some machines, such as the 80386 and the 680x0, truncation
> only applies to shift operations and not the (real or pretended)
> bit-field operations. Define @code{SHIFT_COUNT_TRUNCATED} to be zero on
> such machines. Instead, add patterns to the @file{md} file that include
> the implied truncation of the shift instructions.
>
> I was deliberately trying to avoid this fuzziness with the new target hook.
Hmm. I suppose we could pass the shift operation in there;
ASHIFT, LSHIFT, ZERO_EXTRACT, SIGN_EXTRACT.
r~
