From: Pan Li <[email protected]>
This patch would like to combine the vec_duplicate + vmadd.vv to the
vmadd.vx. From example as below code. The related pattern will depend
on the cost of vec_duplicate from GR2VR. Then the late-combine will
take action if the cost of GR2VR is zero, and reject the combination
if the GR2VR cost is greater than zero.
Heh, the diff is a bit misleading because the nmsac and macc patterns are
almost identical.
In principle LGTM but why the renaming to mul_then_plus? Does it refer
to one of the overwriting variants? But the pattern matches both vmacc and
vmadd?
--
Regards
Robin
