1 //===- AArch64TargetStreamer.cpp - AArch64TargetStreamer class ------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file implements the AArch64TargetStreamer class. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "AArch64TargetStreamer.h" 14 #include "llvm/MC/ConstantPools.h" 15 #include "llvm/MC/MCSection.h" 16 #include "llvm/MC/MCSubtargetInfo.h" 17 18 using namespace llvm; 19 20 // 21 // AArch64TargetStreamer Implemenation 22 // 23 AArch64TargetStreamer::AArch64TargetStreamer(MCStreamer &S) 24 : MCTargetStreamer(S), ConstantPools(new AssemblerConstantPools()) {} 25 26 AArch64TargetStreamer::~AArch64TargetStreamer() = default; 27 28 // The constant pool handling is shared by all AArch64TargetStreamer 29 // implementations. 30 const MCExpr *AArch64TargetStreamer::addConstantPoolEntry(const MCExpr *Expr, 31 unsigned Size, 32 SMLoc Loc) { 33 return ConstantPools->addEntry(Streamer, Expr, Size, Loc); 34 } 35 36 void AArch64TargetStreamer::emitCurrentConstantPool() { 37 ConstantPools->emitForCurrentSection(Streamer); 38 } 39 40 // finish() - write out any non-empty assembler constant pools. 41 void AArch64TargetStreamer::finish() { ConstantPools->emitAll(Streamer); } 42 43 void AArch64TargetStreamer::emitInst(uint32_t Inst) { 44 char Buffer[4]; 45 46 // We can't just use EmitIntValue here, as that will swap the 47 // endianness on big-endian systems (instructions are always 48 // little-endian). 49 for (unsigned I = 0; I < 4; ++I) { 50 Buffer[I] = uint8_t(Inst); 51 Inst >>= 8; 52 } 53 54 getStreamer().EmitBytes(StringRef(Buffer, 4)); 55 } 56 57 namespace llvm { 58 59 MCTargetStreamer * 60 createAArch64ObjectTargetStreamer(MCStreamer &S, const MCSubtargetInfo &STI) { 61 const Triple &TT = STI.getTargetTriple(); 62 if (TT.isOSBinFormatELF()) 63 return new AArch64TargetELFStreamer(S); 64 if (TT.isOSBinFormatCOFF()) 65 return new AArch64TargetWinCOFFStreamer(S); 66 return nullptr; 67 } 68 69 } // end namespace llvm 70