On 2/15/25 3:31 AM, Keith Packard wrote:
The SCMPU instruction doesn't change the C and Z flags when the
incoming length is zero, which means the insn will produce a
value based upon the existing flag values.
As a quick kludge, adjust these flags to ensure a zero result in this
case.
It's as reasonable as other methods such as turning it into a
define_expand and emitting a conditional branch around the sequence when
the count is zero.
Pushed to the trunk. It's not a regression, but it is a code
correctness issue..
Thanks!
jeff
