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-rw-r--r--llvm/lib/Target/ARM/ARMInstrCDE.td1
-rw-r--r--llvm/lib/Target/ARM/ARMInstrMVE.td1
-rw-r--r--llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp101
3 files changed, 47 insertions, 56 deletions
diff --git a/llvm/lib/Target/ARM/ARMInstrCDE.td b/llvm/lib/Target/ARM/ARMInstrCDE.td
index 54e27a6..f4326de 100644
--- a/llvm/lib/Target/ARM/ARMInstrCDE.td
+++ b/llvm/lib/Target/ARM/ARMInstrCDE.td
@@ -268,6 +268,7 @@ class CDE_Vec_Instr<bit acc, dag oops, dag iops, string asm, string cstr,
!con(iops, (ins vpred:$vp)), asm,
!strconcat(cstr, vpred.vpred_constraint)>,
CDE_RequiresQReg {
+ bits<0> vp;
}
diff --git a/llvm/lib/Target/ARM/ARMInstrMVE.td b/llvm/lib/Target/ARM/ARMInstrMVE.td
index 9dffd94..e244134 100644
--- a/llvm/lib/Target/ARM/ARMInstrMVE.td
+++ b/llvm/lib/Target/ARM/ARMInstrMVE.td
@@ -409,6 +409,7 @@ class MVE_p<dag oops, dag iops, InstrItinClass itin, string iname,
!strconcat(iname, "${vp}",
!if(!eq(suffix, ""), "", !strconcat(".", suffix))),
ops, !strconcat(cstr, vpred.vpred_constraint), vecsize, pattern> {
+ bits<0> vp;
let Inst{31-29} = 0b111;
let Inst{27-26} = 0b11;
}
diff --git a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index d358913..e67db8e 100644
--- a/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/llvm/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -639,6 +639,43 @@ static DecodeStatus DecodeCCOutOperand(MCInst &Inst,
return MCDisassembler::Success;
}
+static DecodeStatus DecodeVpredNOperand(MCInst &Inst,
+ const MCDisassembler *Decoder) {
+ const auto *D = static_cast<const ARMDisassembler *>(Decoder);
+ unsigned VCC = D->VPTBlock.getVPTPred();
+ MCRegister CondReg = VCC == ARMVCC::None ? ARM::NoRegister : ARM::P0;
+
+ Inst.addOperand(MCOperand::createImm(VCC)); // $cond
+ Inst.addOperand(MCOperand::createReg(CondReg)); // $cond_reg
+ Inst.addOperand(MCOperand::createReg(ARM::NoRegister)); // $tp_reg
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeVpredROperand(MCInst &Inst,
+ const MCDisassembler *Decoder) {
+ const auto *D = static_cast<const ARMDisassembler *>(Decoder);
+ unsigned VCC = D->VPTBlock.getVPTPred();
+ MCRegister CondReg = VCC == ARMVCC::None ? ARM::NoRegister : ARM::P0;
+
+ Inst.addOperand(MCOperand::createImm(VCC)); // $cond
+ Inst.addOperand(MCOperand::createReg(CondReg)); // $cond_reg
+ Inst.addOperand(MCOperand::createReg(ARM::NoRegister)); // $tp_reg
+
+ // The last sub-operand ($inactive) is tied to an output operand.
+ // The output operand has already been decoded, so just copy it.
+ const MCInstrDesc &MCID = D->MCII->get(Inst.getOpcode());
+ unsigned InactiveOpIdx = Inst.getNumOperands();
+ int TiedOpIdx = MCID.getOperandConstraint(InactiveOpIdx, MCOI::TIED_TO);
+ assert(TiedOpIdx >= 0 &&
+ "Inactive register in vpred_r is not tied to an output!");
+
+ // Make a copy of the operand to ensure it is not invalidated when MI grows.
+ Inst.addOperand(MCOperand(Inst.getOperand(TiedOpIdx))); // $inactive
+
+ return MCDisassembler::Success;
+}
+
static DecodeStatus DecodeSORegImmOperand(MCInst &Inst, unsigned Val,
uint64_t Address,
const MCDisassembler *Decoder) {
@@ -2777,6 +2814,7 @@ static DecodeStatus DecodeMVEModImmInstruction(MCInst &Inst, unsigned Insn,
Inst.addOperand(MCOperand::createImm(imm));
+ Check(S, DecodeVpredROperand(Inst, Decoder));
return S;
}
@@ -2802,6 +2840,7 @@ static DecodeStatus DecodeMVEVADCInstruction(MCInst &Inst, unsigned Insn,
if (!fieldFromInstruction(Insn, 12, 1)) // I bit clear => need input FPSCR
Inst.addOperand(MCOperand::createReg(ARM::FPSCR_NZCV));
+ Check(S, DecodeVpredROperand(Inst, Decoder));
return S;
}
@@ -5466,30 +5505,6 @@ static DecodeStatus DecodeVPTMaskOperand(MCInst &Inst, unsigned Val,
return S;
}
-static DecodeStatus DecodeVpredROperand(MCInst &Inst, unsigned RegNo,
- uint64_t Address,
- const MCDisassembler *Decoder) {
- // The vpred_r operand type includes an MQPR register field derived
- // from the encoding. But we don't actually want to add an operand
- // to the MCInst at this stage, because AddThumbPredicate will do it
- // later, and will infer the register number from the TIED_TO
- // constraint. So this is a deliberately empty decoder method that
- // will inhibit the auto-generated disassembly code from adding an
- // operand at all.
- return MCDisassembler::Success;
-}
-
-[[maybe_unused]] static DecodeStatus
-DecodeVpredNOperand(MCInst &Inst, unsigned RegNo, uint64_t Address,
- const MCDisassembler *Decoder) {
- // Similar to above, we want to ensure that no operands are added for the
- // vpred operands. (This is marked "maybe_unused" for the moment; because
- // DecoderEmitter currently (wrongly) omits operands with no instruction bits,
- // the decoder doesn't actually call it yet. That will be addressed in a
- // future change.)
- return MCDisassembler::Success;
-}
-
static DecodeStatus
DecodeRestrictedIPredicateOperand(MCInst &Inst, unsigned Val, uint64_t Address,
const MCDisassembler *Decoder) {
@@ -5668,6 +5683,7 @@ DecodeMVE_MEM_pre(MCInst &Inst, unsigned Val, uint64_t Address,
if (!Check(S, AddrDecoder(Inst, addr, Address, Decoder)))
return MCDisassembler::Fail;
+ Check(S, DecodeVpredNOperand(Inst, Decoder));
return S;
}
@@ -5871,7 +5887,7 @@ static DecodeStatus DecodeMVEVCVTt1fp(MCInst &Inst, unsigned Insn,
return MCDisassembler::Fail;
if (!Check(S, DecodeVCVTImmOperand(Inst, imm6, Address, Decoder)))
return MCDisassembler::Fail;
-
+ Check(S, DecodeVpredROperand(Inst, Decoder));
return S;
}
@@ -5906,6 +5922,7 @@ static DecodeStatus DecodeMVEVCMP(MCInst &Inst, unsigned Insn, uint64_t Address,
if (!Check(S, predicate_decoder(Inst, fc, Address, Decoder)))
return MCDisassembler::Fail;
+ Check(S, DecodeVpredNOperand(Inst, Decoder));
return S;
}
@@ -5916,6 +5933,7 @@ static DecodeStatus DecodeMveVCTP(MCInst &Inst, unsigned Insn, uint64_t Address,
unsigned Rn = fieldFromInstruction(Insn, 16, 4);
if (!Check(S, DecoderGPRRegisterClass(Inst, Rn, Address, Decoder)))
return MCDisassembler::Fail;
+ Check(S, DecodeVpredNOperand(Inst, Decoder));
return S;
}
@@ -5925,6 +5943,7 @@ static DecodeStatus DecodeMVEVPNOT(MCInst &Inst, unsigned Insn,
DecodeStatus S = MCDisassembler::Success;
Inst.addOperand(MCOperand::createReg(ARM::VPR));
Inst.addOperand(MCOperand::createReg(ARM::VPR));
+ Check(S, DecodeVpredNOperand(Inst, Decoder));
return S;
}
@@ -6199,15 +6218,13 @@ ARMDisassembler::AddThumbPredicate(MCInst &MI) const {
(isVectorPredicable(MI) && ITBlock.instrInITBlock()))
S = SoftFail;
- // If we're in an IT/VPT block, base the predicate on that. Otherwise,
+ // If we're in an IT block, base the predicate on that. Otherwise,
// assume a predicate of AL.
unsigned CC = ARMCC::AL;
- unsigned VCC = ARMVCC::None;
if (ITBlock.instrInITBlock()) {
CC = ITBlock.getITCC();
ITBlock.advanceITState();
} else if (VPTBlock.instrInVPTBlock()) {
- VCC = VPTBlock.getVPTPred();
VPTBlock.advanceVPTState();
}
@@ -6230,34 +6247,6 @@ ARMDisassembler::AddThumbPredicate(MCInst &MI) const {
Check(S, SoftFail);
}
- MCInst::iterator VCCI = MI.begin();
- unsigned VCCPos;
- for (VCCPos = 0; VCCPos < MCID.NumOperands; ++VCCPos, ++VCCI) {
- if (ARM::isVpred(MCID.operands()[VCCPos].OperandType) || VCCI == MI.end())
- break;
- }
-
- if (isVectorPredicable(MI)) {
- VCCI = MI.insert(VCCI, MCOperand::createImm(VCC));
- ++VCCI;
- if (VCC == ARMVCC::None)
- VCCI = MI.insert(VCCI, MCOperand::createReg(0));
- else
- VCCI = MI.insert(VCCI, MCOperand::createReg(ARM::P0));
- ++VCCI;
- VCCI = MI.insert(VCCI, MCOperand::createReg(0));
- ++VCCI;
- if (MCID.operands()[VCCPos].OperandType == ARM::OPERAND_VPRED_R) {
- int TiedOp = MCID.getOperandConstraint(VCCPos + 3, MCOI::TIED_TO);
- assert(TiedOp >= 0 &&
- "Inactive register in vpred_r is not tied to an output!");
- // Copy the operand to ensure it's not invalidated when MI grows.
- MI.insert(VCCI, MCOperand(MI.getOperand(TiedOp)));
- }
- } else if (VCC != ARMVCC::None) {
- Check(S, SoftFail);
- }
-
return S;
}
generated by cgit v1.1 at 2025-10-05 22:17:16 +0000