diff options
Diffstat (limited to 'contrib/llvm-project/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/contrib/llvm-project/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp b/contrib/llvm-project/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp new file mode 100644 index 000000000000..540f901fd479 --- /dev/null +++ b/contrib/llvm-project/llvm/lib/Target/CSKY/MCTargetDesc/CSKYMCCodeEmitter.cpp @@ -0,0 +1,335 @@ +//===-- CSKYMCCodeEmitter.cpp - CSKY Code Emitter interface ---------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file implements the CSKYMCCodeEmitter class. +// +//===----------------------------------------------------------------------===// + +#include "CSKYMCCodeEmitter.h" +#include "CSKYMCExpr.h" +#include "MCTargetDesc/CSKYMCTargetDesc.h" +#include "llvm/ADT/Statistic.h" +#include "llvm/MC/MCInstBuilder.h" +#include "llvm/MC/MCInstrInfo.h" +#include "llvm/MC/MCRegisterInfo.h" +#include "llvm/MC/MCSubtargetInfo.h" +#include "llvm/Support/Casting.h" +#include "llvm/Support/EndianStream.h" + +using namespace llvm; + +#define DEBUG_TYPE "csky-mccode-emitter" + +STATISTIC(MCNumEmitted, "Number of MC instructions emitted"); + +unsigned CSKYMCCodeEmitter::getOImmOpValue(const MCInst &MI, unsigned Idx, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + const MCOperand &MO = MI.getOperand(Idx); + assert(MO.isImm() && "Unexpected MO type."); + return MO.getImm() - 1; +} + +unsigned +CSKYMCCodeEmitter::getImmOpValueIDLY(const MCInst &MI, unsigned Idx, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + const MCOperand &MO = MI.getOperand(Idx); + assert(MO.isImm() && "Unexpected MO type."); + + auto V = (MO.getImm() <= 3) ? 4 : MO.getImm(); + return V - 1; +} + +unsigned +CSKYMCCodeEmitter::getImmOpValueMSBSize(const MCInst &MI, unsigned Idx, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + const MCOperand &MSB = MI.getOperand(Idx); + const MCOperand &LSB = MI.getOperand(Idx + 1); + assert(MSB.isImm() && LSB.isImm() && "Unexpected MO type."); + + return MSB.getImm() - LSB.getImm(); +} + +static void writeData(uint32_t Bin, unsigned Size, raw_ostream &OS) { + uint16_t LO16 = static_cast<uint16_t>(Bin); + uint16_t HI16 = static_cast<uint16_t>(Bin >> 16); + + if (Size == 4) + support::endian::write<uint16_t>(OS, HI16, support::little); + + support::endian::write<uint16_t>(OS, LO16, support::little); +} + +void CSKYMCCodeEmitter::expandJBTF(const MCInst &MI, raw_ostream &OS, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + + MCInst TmpInst; + + uint32_t Binary; + + TmpInst = + MCInstBuilder(MI.getOpcode() == CSKY::JBT_E ? CSKY::BF16 : CSKY::BT16) + .addOperand(MI.getOperand(0)) + .addImm(6); + Binary = getBinaryCodeForInstr(TmpInst, Fixups, STI); + writeData(Binary, 2, OS); + + if (!STI.getFeatureBits()[CSKY::Has2E3]) + TmpInst = MCInstBuilder(CSKY::BR32) + .addOperand(MI.getOperand(1)) + .addOperand(MI.getOperand(2)); + else + TmpInst = MCInstBuilder(CSKY::JMPI32).addOperand(MI.getOperand(2)); + Binary = getBinaryCodeForInstr(TmpInst, Fixups, STI); + Fixups[Fixups.size() - 1].setOffset(2); + writeData(Binary, 4, OS); +} + +void CSKYMCCodeEmitter::expandNEG(const MCInst &MI, raw_ostream &OS, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + + MCInst TmpInst; + uint32_t Binary; + unsigned Size = MI.getOpcode() == CSKY::NEG32 ? 4 : 2; + + TmpInst = MCInstBuilder(Size == 4 ? CSKY::NOT32 : CSKY::NOT16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)); + Binary = getBinaryCodeForInstr(TmpInst, Fixups, STI); + writeData(Binary, Size, OS); + + TmpInst = MCInstBuilder(Size == 4 ? CSKY::ADDI32 : CSKY::ADDI16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(0)) + .addImm(1); + Binary = getBinaryCodeForInstr(TmpInst, Fixups, STI); + writeData(Binary, Size, OS); +} + +void CSKYMCCodeEmitter::expandRSUBI(const MCInst &MI, raw_ostream &OS, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + + MCInst TmpInst; + uint32_t Binary; + unsigned Size = MI.getOpcode() == CSKY::RSUBI32 ? 4 : 2; + + TmpInst = MCInstBuilder(Size == 4 ? CSKY::NOT32 : CSKY::NOT16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)); + Binary = getBinaryCodeForInstr(TmpInst, Fixups, STI); + writeData(Binary, Size, OS); + + TmpInst = MCInstBuilder(Size == 4 ? CSKY::ADDI32 : CSKY::ADDI16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(0)) + .addImm(MI.getOperand(2).getImm() + 1); + Binary = getBinaryCodeForInstr(TmpInst, Fixups, STI); + writeData(Binary, Size, OS); +} + +void CSKYMCCodeEmitter::encodeInstruction(const MCInst &MI, raw_ostream &OS, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + const MCInstrDesc &Desc = MII.get(MI.getOpcode()); + unsigned Size = Desc.getSize(); + + MCInst TmpInst; + + switch (MI.getOpcode()) { + default: + TmpInst = MI; + break; + case CSKY::JBT_E: + case CSKY::JBF_E: + expandJBTF(MI, OS, Fixups, STI); + MCNumEmitted += 2; + return; + case CSKY::NEG32: + case CSKY::NEG16: + expandNEG(MI, OS, Fixups, STI); + MCNumEmitted += 2; + return; + case CSKY::RSUBI32: + case CSKY::RSUBI16: + expandRSUBI(MI, OS, Fixups, STI); + MCNumEmitted += 2; + return; + case CSKY::JBSR32: + TmpInst = MCInstBuilder(CSKY::BSR32).addOperand(MI.getOperand(0)); + break; + case CSKY::JBR16: + TmpInst = MCInstBuilder(CSKY::BR16).addOperand(MI.getOperand(0)); + break; + case CSKY::JBR32: + TmpInst = MCInstBuilder(CSKY::BR32).addOperand(MI.getOperand(0)); + break; + case CSKY::JBT16: + TmpInst = MCInstBuilder(CSKY::BT16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)); + break; + case CSKY::JBT32: + TmpInst = MCInstBuilder(CSKY::BT32) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)); + break; + case CSKY::JBF16: + TmpInst = MCInstBuilder(CSKY::BF16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)); + break; + case CSKY::JBF32: + TmpInst = MCInstBuilder(CSKY::BF32) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)); + break; + case CSKY::LRW32_Gen: + TmpInst = MCInstBuilder(CSKY::LRW32) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(2)); + break; + case CSKY::LRW16_Gen: + TmpInst = MCInstBuilder(CSKY::LRW16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(2)); + break; + case CSKY::CMPLEI32: + TmpInst = MCInstBuilder(CSKY::CMPLTI32) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)) + .addImm(MI.getOperand(2).getImm() + 1); + break; + case CSKY::CMPLEI16: + TmpInst = MCInstBuilder(CSKY::CMPLTI16) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)) + .addImm(MI.getOperand(2).getImm() + 1); + break; + case CSKY::ROTRI32: + TmpInst = MCInstBuilder(CSKY::ROTLI32) + .addOperand(MI.getOperand(0)) + .addOperand(MI.getOperand(1)) + .addImm(32 - MI.getOperand(2).getImm()); + break; + case CSKY::BGENI: + auto V = 1 << MI.getOperand(1).getImm(); + TmpInst = + MCInstBuilder(CSKY::MOVI32).addOperand(MI.getOperand(0)).addImm(V); + break; + } + + ++MCNumEmitted; + + uint32_t Bin = getBinaryCodeForInstr(TmpInst, Fixups, STI); + + uint16_t LO16 = static_cast<uint16_t>(Bin); + uint16_t HI16 = static_cast<uint16_t>(Bin >> 16); + + if (Size == 4) + support::endian::write<uint16_t>(OS, HI16, support::little); + + support::endian::write<uint16_t>(OS, LO16, support::little); +} + +unsigned +CSKYMCCodeEmitter::getMachineOpValue(const MCInst &MI, const MCOperand &MO, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + if (MO.isReg()) + return Ctx.getRegisterInfo()->getEncodingValue(MO.getReg()); + + if (MO.isImm()) + return static_cast<unsigned>(MO.getImm()); + + llvm_unreachable("Unhandled expression!"); + return 0; +} + +unsigned +CSKYMCCodeEmitter::getRegSeqImmOpValue(const MCInst &MI, unsigned Idx, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + assert(MI.getOperand(Idx).isReg() && "Unexpected MO type."); + assert(MI.getOperand(Idx + 1).isImm() && "Unexpected MO type."); + + unsigned Ry = MI.getOperand(Idx).getReg(); + unsigned Rz = MI.getOperand(Idx + 1).getImm(); + + unsigned Imm = Ctx.getRegisterInfo()->getEncodingValue(Rz) - + Ctx.getRegisterInfo()->getEncodingValue(Ry); + + return ((Ctx.getRegisterInfo()->getEncodingValue(Ry) << 5) | Imm); +} + +unsigned +CSKYMCCodeEmitter::getRegisterSeqOpValue(const MCInst &MI, unsigned Op, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + unsigned Reg1 = + Ctx.getRegisterInfo()->getEncodingValue(MI.getOperand(Op).getReg()); + unsigned Reg2 = + Ctx.getRegisterInfo()->getEncodingValue(MI.getOperand(Op + 1).getReg()); + + unsigned Binary = ((Reg1 & 0x1f) << 5) | (Reg2 - Reg1); + + return Binary; +} + +unsigned CSKYMCCodeEmitter::getImmJMPIX(const MCInst &MI, unsigned Idx, + SmallVectorImpl<MCFixup> &Fixups, + const MCSubtargetInfo &STI) const { + if (MI.getOperand(Idx).getImm() == 16) + return 0; + else if (MI.getOperand(Idx).getImm() == 24) + return 1; + else if (MI.getOperand(Idx).getImm() == 32) + return 2; + else if (MI.getOperand(Idx).getImm() == 40) + return 3; + else + assert(0); +} + +MCFixupKind CSKYMCCodeEmitter::getTargetFixup(const MCExpr *Expr) const { + const CSKYMCExpr *CSKYExpr = cast<CSKYMCExpr>(Expr); + + switch (CSKYExpr->getKind()) { + default: + llvm_unreachable("Unhandled fixup kind!"); + case CSKYMCExpr::VK_CSKY_ADDR: + return MCFixupKind(CSKY::fixup_csky_addr32); + case CSKYMCExpr::VK_CSKY_ADDR_HI16: + return MCFixupKind(CSKY::fixup_csky_addr_hi16); + case CSKYMCExpr::VK_CSKY_ADDR_LO16: + return MCFixupKind(CSKY::fixup_csky_addr_lo16); + case CSKYMCExpr::VK_CSKY_GOT: + return MCFixupKind(CSKY::fixup_csky_got32); + case CSKYMCExpr::VK_CSKY_GOTPC: + return MCFixupKind(CSKY::fixup_csky_gotpc); + case CSKYMCExpr::VK_CSKY_GOTOFF: + return MCFixupKind(CSKY::fixup_csky_gotoff); + case CSKYMCExpr::VK_CSKY_PLT: + return MCFixupKind(CSKY::fixup_csky_plt32); + case CSKYMCExpr::VK_CSKY_PLT_IMM18_BY4: + return MCFixupKind(CSKY::fixup_csky_plt_imm18_scale4); + case CSKYMCExpr::VK_CSKY_GOT_IMM18_BY4: + return MCFixupKind(CSKY::fixup_csky_got_imm18_scale4); + } +} + +MCCodeEmitter *llvm::createCSKYMCCodeEmitter(const MCInstrInfo &MCII, + MCContext &Ctx) { + return new CSKYMCCodeEmitter(Ctx, MCII); +} + +#include "CSKYGenMCCodeEmitter.inc" |