diff options
Diffstat (limited to 'lib/Target/Mips/Disassembler/MipsDisassembler.cpp')
-rw-r--r-- | lib/Target/Mips/Disassembler/MipsDisassembler.cpp | 52 |
1 files changed, 51 insertions, 1 deletions
diff --git a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp index a543840132..fc3b922602 100644 --- a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp +++ b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp @@ -263,6 +263,11 @@ static DecodeStatus DecodeExtSize(MCInst &Inst, uint64_t Address, const void *Decoder); +/// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't +/// handle. +template <typename InsnType> +static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address, + const void *Decoder); namespace llvm { extern Target TheMipselTarget, TheMipsTarget, TheMips64Target, TheMips64elTarget; @@ -304,9 +309,54 @@ extern "C" void LLVMInitializeMipsDisassembler() { createMips64elDisassembler); } - #include "MipsGenDisassemblerTables.inc" +template <typename InsnType> +static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address, + const void *Decoder) { + typedef DecodeStatus (*DecodeFN)(MCInst &, unsigned, uint64_t, const void *); + // The size of the n field depends on the element size + // The register class also depends on this. + InsnType tmp = fieldFromInstruction(insn, 17, 5); + unsigned NSize = 0; + DecodeFN RegDecoder = nullptr; + if ((tmp & 0x18) == 0x00) { // INSVE_B + NSize = 4; + RegDecoder = DecodeMSA128BRegisterClass; + } else if ((tmp & 0x1c) == 0x10) { // INSVE_H + NSize = 3; + RegDecoder = DecodeMSA128HRegisterClass; + } else if ((tmp & 0x1e) == 0x18) { // INSVE_W + NSize = 2; + RegDecoder = DecodeMSA128WRegisterClass; + } else if ((tmp & 0x1f) == 0x1c) { // INSVE_D + NSize = 1; + RegDecoder = DecodeMSA128DRegisterClass; + } else + llvm_unreachable("Invalid encoding"); + + assert(NSize != 0 && RegDecoder != nullptr); + + // $wd + tmp = fieldFromInstruction(insn, 6, 5); + if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail) + return MCDisassembler::Fail; + // $wd_in + if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail) + return MCDisassembler::Fail; + // $n + tmp = fieldFromInstruction(insn, 16, NSize); + MI.addOperand(MCOperand::CreateImm(tmp)); + // $ws + tmp = fieldFromInstruction(insn, 11, 5); + if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail) + return MCDisassembler::Fail; + // $n2 + MI.addOperand(MCOperand::CreateImm(0)); + + return MCDisassembler::Success; +} + /// readInstruction - read four bytes from the MemoryObject /// and return 32 bit word sorted according to the given endianess static DecodeStatus readInstruction32(const MemoryObject ®ion, |