================
@@ -513,11 +514,37 @@ SystemZTargetLowering::SystemZTargetLowering(const
TargetMachine &TM,
}
// Handle floating-point types.
+ // Promote all f16 operations to float, with some exceptions below.
+ for (unsigned Opc = 0; Opc < ISD::BUILTIN_OP_END; ++Opc)
+ setOperationAction(Opc, MVT::f16, Promote);
+ setOperationAction(ISD::ConstantFP, MVT::f16, Expand);
+ for (MVT VT : {MVT::f32, MVT::f64, MVT::f128}) {
+ setLoadExtAction(ISD::EXTLOAD, VT, MVT::f16, Expand);
+ setTruncStoreAction(VT, MVT::f16, Expand);
+ }
+ setOperationAction(ISD::LOAD, MVT::f16, Custom);
+ setOperationAction(ISD::ATOMIC_LOAD, MVT::f16, Custom);
+ setOperationAction(ISD::STORE, MVT::f16, Custom);
+ setOperationAction(ISD::ATOMIC_STORE, MVT::f16, Custom);
+ setOperationAction(ISD::FP_ROUND, MVT::f16, Custom);
+ setOperationAction(ISD::FP_EXTEND, MVT::f32, Custom);
+ setOperationAction(ISD::FP_EXTEND, MVT::f64, Custom);
+ setOperationAction(ISD::FP_EXTEND, MVT::f128, Custom);
+
for (unsigned I = MVT::FIRST_FP_VALUETYPE;
I <= MVT::LAST_FP_VALUETYPE;
++I) {
MVT VT = MVT::SimpleValueType(I);
if (isTypeLegal(VT)) {
+ // No special instructions for these.
+ setOperationAction(ISD::FSIN, VT, Expand);
+ setOperationAction(ISD::FCOS, VT, Expand);
+ setOperationAction(ISD::FSINCOS, VT, Expand);
+ setOperationAction(ISD::FREM, VT, Expand);
+ setOperationAction(ISD::FPOW, VT, Expand);
----------------
tgross35 wrote:
Just crosslinking that there is an effort to add f16 libcalls
https://github.com/llvm/llvm-project/issues/95250 but I have no clue what the
plan is as far as lowering to them.
https://github.com/llvm/llvm-project/pull/109164
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