https://gcc.gnu.org/bugzilla/show_bug.cgi?id=128381
Bug ID: 128381
Summary: powerpc64le: scalar saturating subtract
(subwus/subdus) not exposed via ussub<mode>3, so
.SAT_SUB is never formed
Product: gcc
Version: 17.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jskumari at gcc dot gnu.org
Target Milestone: ---
Currently for powerpc, we have the *subfus<mode>3_<code> insn for
TARGET_FUTURE. It emits subwus or subdus by matching a raw RTL if_then_else of
the form (gtu|geu a b) ? (minus a b) : 0. It does not define the standard optab
ussub<mode>3 for the GPR modes SImode and DImode.
As a result, GCC's middle end never forms .SAT_SUB on this target.
