From 220c9cd426ec0590f6a43550b28fb344d8dfd8fd Mon Sep 17 00:00:00 2001 From: Richard-Qin-X Date: Sat, 15 Aug 2026 19:04:08 +0800 Subject: [RISCV][GlobalISel] Legalize floating-point to integer conversions --- backend/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) (limited to 'backend/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp') diff --git a/backend/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp b/backend/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp index 06eea7b..864aca5 100644 --- a/backend/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp +++ b/backend/lib/Target/RISCV/GISel/RISCVLegalizerInfo.cpp @@ -861,6 +861,25 @@ Expected RISCVLegalizerInfo::legalizeCustom(LegalizerHelper &Helper, Helper.Observer.changedInstr(Instruction); return {}; } + if (Instruction.opcode() == opcode(GenericOpcode::G_FPTOSI) || + Instruction.opcode() == opcode(GenericOpcode::G_FPTOUI)) { + auto XLenType = LowLevelType::makeCategoryNeutralScalar(64); + if (!XLenType) + return std::unexpected(XLenType.error()); + + Helper.Observer.changingInstr(Instruction); + if (auto Widened = Helper.widenScalarDst(Instruction, *XLenType); !Widened) + return std::unexpected(Widened.error()); + auto WordOpcode = getRISCVWOpcode(static_cast(Instruction.opcode().value())); + if (!WordOpcode) + return std::unexpected(WordOpcode.error()); + if (auto Changed = Instruction.setOpcode(*WordOpcode); !Changed) + return std::unexpected(Changed.error()); + if (auto RoundingMode = Instruction.addOperand(MachineOperand::immediate(1)); !RoundingMode) + return std::unexpected(RoundingMode.error()); + Helper.Observer.changedInstr(Instruction); + return {}; + } if (Instruction.opcode() == opcode(GenericOpcode::G_ANYEXT) || Instruction.opcode() == opcode(GenericOpcode::G_SEXT) || Instruction.opcode() == opcode(GenericOpcode::G_ZEXT)) { -- cgit v1.2.3