On 29/04/16 12:58, Andrew Burgess wrote:
* config/arc/arc.md (*loadqi_update): Replace use of 'rI'
constraint with 'rCm2' constraints to limit possible immediate
size.
(*load_zeroextendqisi_update): Likewise.
(*load_signextendqisi_update): Likewise.
* Joern Wolfgang Rennecke [2016-04-28 18:06:42 +0100]:
> On 21/04/16 12:39, Andrew Burgess wrote:
> >
> > * config/arc/arc.md (*loadqi_update): Replace use of 'rI'
> > constraint with separate 'r' and 'Cm2' constraints.
> >
> Why don't you use simply rCm2 ?
You are absolutely correc
On 21/04/16 12:39, Andrew Burgess wrote:
* config/arc/arc.md (*loadqi_update): Replace use of 'rI'
constraint with separate 'r' and 'Cm2' constraints.
Why don't you use simply rCm2 ?
In the load*_update instructions the constraint 'rI' was being used,
which would accept either a register or a signed 12 bit constant. The
problem is that the 32-bit form of ld with update only takes a signed
9-bit immediate. As such, some ld instructions could be generated that
would, when assem
