================
@@ -729,6 +729,25 @@ GCNTTIImpl::instCombineIntrinsic(InstCombiner &IC,
IntrinsicInst &II) const {
break;
}
+ case Intrinsic::amdgcn_cvt_off_f32_i4: {
+ Value* Arg = II.getArgOperand(0);
+ Type *Ty = II.getType();
+
+ if (isa<PoisonValue>(Arg))
+ return IC.replaceInstUsesWith(II, PoisonValue::get(Ty));
+
+ if(IC.getSimplifyQuery().isUndefValue(Arg))
+ return IC.replaceInstUsesWith(II, Constant::getNullValue(Ty));
+
+ ConstantInt *CArg = dyn_cast<ConstantInt>(II.getArgOperand(0));
+ if (!CArg)
+ break;
+
+ int CArg4BitAsInt = CArg->getValue().trunc(4).getSExtValue();
+ float ResVal = 0.0625 * CArg4BitAsInt;
----------------
jmmartinez wrote:
I tabulated the results to avoid any fp operations.
https://github.com/llvm/llvm-project/pull/133741
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