diff options
Diffstat (limited to 'backend/lib/Target/RISCV/RISCVMCCodeEmitter.cpp')
| -rw-r--r-- | backend/lib/Target/RISCV/RISCVMCCodeEmitter.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/backend/lib/Target/RISCV/RISCVMCCodeEmitter.cpp b/backend/lib/Target/RISCV/RISCVMCCodeEmitter.cpp index 15a0c2d..339d817 100644 --- a/backend/lib/Target/RISCV/RISCVMCCodeEmitter.cpp +++ b/backend/lib/Target/RISCV/RISCVMCCodeEmitter.cpp @@ -88,6 +88,20 @@ namespace { return *Encoding - 8U; } +[[nodiscard]] Expected<std::uint32_t> savedRegisterEncoding(const mc::MCInst &Instruction, + std::size_t Index, + const TargetDescription &Target) { + auto Encoding = registerEncoding(Instruction, Index, Target); + if (!Encoding) + return std::unexpected(Encoding.error()); + if (*Encoding == 8 || *Encoding == 9) + return *Encoding - 8U; + if (*Encoding >= 18 && *Encoding <= 23) + return *Encoding - 16U; + return makeUnexpected(ErrorCode::InstructionEncodingFailed, + "Zcmp move requires an s0-s7 register"); +} + [[nodiscard]] bool fitsSigned(std::int64_t Value, unsigned Bits) noexcept { const std::int64_t Minimum = -(std::int64_t{1} << (Bits - 1U)); const std::int64_t Maximum = (std::int64_t{1} << (Bits - 1U)) - 1; @@ -649,6 +663,20 @@ namespace { return immediateOrFixup(Instruction, Index, Kind, PCRelative, Result); }; + if (Opcode == InstructionOpcode::CM_MVA01S || Opcode == InstructionOpcode::CM_MVSA01) { + auto Count = requireOperandCount(Instruction, 2); + if (!Count) + return std::unexpected(Count.error()); + auto First = savedRegisterEncoding(Instruction, 0, Target); + auto Second = savedRegisterEncoding(Instruction, 1, Target); + if (!First) + return std::unexpected(First.error()); + if (!Second) + return std::unexpected(Second.error()); + return static_cast<std::uint16_t>((Encoding & ~std::uint16_t{0x039c}) | *First << 7U | + *Second << 2U); + } + if (Opcode == InstructionOpcode::C_ADDI4SPN) { auto Count = requireOperandCount(Instruction, 2); if (!Count) |