================
@@ -1047,6 +1072,56 @@ bool AArch64InstPrinter::printSysAlias(const MCInst *MI,
return true;
}
+bool AArch64InstPrinter::printSyslAlias(const MCInst *MI,
+ const MCSubtargetInfo &STI,
+ raw_ostream &O) {
+#ifndef NDEBUG
+ unsigned Opcode = MI->getOpcode();
+ assert(Opcode == AArch64::SYSLxt && "Invalid opcode for SYSL alias!");
+#endif
+
+ StringRef Reg = getRegisterName(MI->getOperand(0).getReg());
+ const MCOperand &Op1 = MI->getOperand(1);
+ const MCOperand &Cn = MI->getOperand(2);
+ const MCOperand &Cm = MI->getOperand(3);
+ const MCOperand &Op2 = MI->getOperand(4);
+
+ unsigned Op1Val = Op1.getImm();
+ unsigned CnVal = Cn.getImm();
+ unsigned CmVal = Cm.getImm();
+ unsigned Op2Val = Op2.getImm();
+
+ uint16_t Encoding = Op2Val;
+ Encoding |= CmVal << 3;
+ Encoding |= CnVal << 7;
+ Encoding |= Op1Val << 11;
+
+ std::string Ins;
+ std::string Name;
+
+ if (CnVal == 12) {
+ if (CmVal == 3) {
+ // GICR aliases
+ const AArch64GICR::GICR *GICR =
+ AArch64GICR::lookupGICRByEncoding(Encoding);
+ if (!GICR || !GICR->haveFeatures(STI.getFeatureBits()))
+ return false;
+
+ Ins = "gicr";
+ Name = std::string(GICR->Name);
+ } else
+ return false;
+ } else
+ return false;
+
+ std::string Str;
+ llvm::transform(Name, Name.begin(), ::tolower);
+
----------------
jthackray wrote:
Yes, true. There are very few `SYSL` and `SYSP` instructions compared with
`SYS`, where there is complicated logic. As noted, this defaulted to printing,
which was the correct behaviour. I've removed `NeedsReg` now.
https://github.com/llvm/llvm-project/pull/163159
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