https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101022
Bug ID: 101022
Summary: rs6000: __builtin_altivec_vcmpequt expands to wrong
pattern
Product: gcc
Version: 12.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: wschmidt at gcc dot gnu.org
Target Milestone: ---
This line appears in a recent patch committed this week:
+BU_P10V_AV_2 (VCMPEQUT, "vcmpequt", CONST, eqvv1ti3)
This builtin should expand to the ISA 3.1 vcmpequq instruction, but this
definition causes it to expand to bitwise equivalence (not-XOR). That violates
the definition of vec_cmpeq, which must return all 0s or all 1s for each lane
element. For this type, that means all 0s or all 1s in the entire register.
