================
@@ -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);
----------------
JonPsson1 wrote:
I tried Promote but ended up with an f32 operation that was not handled
further. Did not find anything like "promote and expand/re-visit",
unfortunately, so I did a manual "custom-promotion" and then common-code
revisited the new f32 node.
As there is no support for these libcalls for f16, it seems only the
corresponding llvm intrinsics need to be handled, I would assume. I started
with this, but not quite sure if this is the right way or how many of these
(all?) should be handled here.
https://github.com/llvm/llvm-project/pull/109164
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