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Diffstat (limited to 'llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp')
-rw-r--r--llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp159
1 files changed, 158 insertions, 1 deletions
diff --git a/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp b/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
index 694aee818f7c..8e7251a74dfd 100644
--- a/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
+++ b/llvm/lib/Target/AVR/Disassembler/AVRDisassembler.cpp
@@ -57,23 +57,180 @@ extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializeAVRDisassembler() {
createAVRDisassembler);
}
+static const uint16_t GPRDecoderTable[] = {
+ AVR::R0, AVR::R1, AVR::R2, AVR::R3,
+ AVR::R4, AVR::R5, AVR::R6, AVR::R7,
+ AVR::R8, AVR::R9, AVR::R10, AVR::R11,
+ AVR::R12, AVR::R13, AVR::R14, AVR::R15,
+ AVR::R16, AVR::R17, AVR::R18, AVR::R19,
+ AVR::R20, AVR::R21, AVR::R22, AVR::R23,
+ AVR::R24, AVR::R25, AVR::R26, AVR::R27,
+ AVR::R28, AVR::R29, AVR::R30, AVR::R31,
+};
+
static DecodeStatus DecodeGPR8RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Register = GPRDecoderTable[RegNo];
+ Inst.addOperand(MCOperand::createReg(Register));
return MCDisassembler::Success;
}
static DecodeStatus DecodeLD8RegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
+ if (RegNo > 15)
+ return MCDisassembler::Fail;
+
+ unsigned Register = GPRDecoderTable[RegNo+16];
+ Inst.addOperand(MCOperand::createReg(Register));
return MCDisassembler::Success;
}
static DecodeStatus DecodePTRREGSRegisterClass(MCInst &Inst, unsigned RegNo,
uint64_t Address, const void *Decoder) {
+ // Note: this function must be defined but does not seem to be called.
+ assert(false && "unimplemented: PTRREGS register class");
return MCDisassembler::Success;
}
+static DecodeStatus decodeFIOARr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFIORdA(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFIOBIT(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeCallTarget(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFRd(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFLPMX(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFFMULRdRr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFMOVWRdRr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFWRdK(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus decodeFMUL2RdRr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
#include "AVRGenDisassemblerTables.inc"
+static DecodeStatus decodeFIOARr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned addr = 0;
+ addr |= fieldFromInstruction(Insn, 0, 4);
+ addr |= fieldFromInstruction(Insn, 9, 2) << 4;
+ unsigned reg = fieldFromInstruction(Insn, 4, 5);
+ Inst.addOperand(MCOperand::createImm(addr));
+ if (DecodeGPR8RegisterClass(Inst, reg, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFIORdA(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned addr = 0;
+ addr |= fieldFromInstruction(Insn, 0, 4);
+ addr |= fieldFromInstruction(Insn, 9, 2) << 4;
+ unsigned reg = fieldFromInstruction(Insn, 4, 5);
+ if (DecodeGPR8RegisterClass(Inst, reg, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::createImm(addr));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFIOBIT(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned addr = fieldFromInstruction(Insn, 3, 5);
+ unsigned b = fieldFromInstruction(Insn, 0, 3);
+ Inst.addOperand(MCOperand::createImm(addr));
+ Inst.addOperand(MCOperand::createImm(b));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeCallTarget(MCInst &Inst, unsigned Field,
+ uint64_t Address, const void *Decoder) {
+ // Call targets need to be shifted left by one so this needs a custom
+ // decoder.
+ Inst.addOperand(MCOperand::createImm(Field << 1));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFRd(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned d = fieldFromInstruction(Insn, 4, 5);
+ if (DecodeGPR8RegisterClass(Inst, d, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFLPMX(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ if (decodeFRd(Inst, Insn, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::createReg(AVR::R31R30));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFFMULRdRr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned d = fieldFromInstruction(Insn, 4, 3) + 16;
+ unsigned r = fieldFromInstruction(Insn, 0, 3) + 16;
+ if (DecodeGPR8RegisterClass(Inst, d, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ if (DecodeGPR8RegisterClass(Inst, r, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFMOVWRdRr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned r = fieldFromInstruction(Insn, 4, 4) * 2;
+ unsigned d = fieldFromInstruction(Insn, 0, 4) * 2;
+ if (DecodeGPR8RegisterClass(Inst, r, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ if (DecodeGPR8RegisterClass(Inst, d, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFWRdK(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned d = fieldFromInstruction(Insn, 4, 2) * 2 + 24; // starts at r24:r25
+ unsigned k = 0;
+ k |= fieldFromInstruction(Insn, 0, 4);
+ k |= fieldFromInstruction(Insn, 6, 2) << 4;
+ if (DecodeGPR8RegisterClass(Inst, d, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ if (DecodeGPR8RegisterClass(Inst, d, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::createImm(k));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus decodeFMUL2RdRr(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ unsigned rd = fieldFromInstruction(Insn, 4, 4) + 16;
+ unsigned rr = fieldFromInstruction(Insn, 0, 4) + 16;
+ if (DecodeGPR8RegisterClass(Inst, rd, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ if (DecodeGPR8RegisterClass(Inst, rr, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ return MCDisassembler::Success;
+}
+
static DecodeStatus readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
uint64_t &Size, uint32_t &Insn) {
if (Bytes.size() < 2) {
@@ -96,7 +253,7 @@ static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
}
Size = 4;
- Insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) | (Bytes[3] << 24);
+ Insn = (Bytes[0] << 16) | (Bytes[1] << 24) | (Bytes[2] << 0) | (Bytes[3] << 8);
return MCDisassembler::Success;
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-04 13:24:27 +0000