contrib/llvm/lib/Target/AArch64/MCTargetDesc/AArch64TargetStreamer.cpp

   1 //===- AArch64TargetStreamer.cpp - AArch64TargetStreamer class ------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file implements the AArch64TargetStreamer class.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "AArch64TargetStreamer.h"
  15 #include "llvm/MC/ConstantPools.h"
  16
  17 using namespace llvm;
  18
  19 //
  20 // AArch64TargetStreamer Implemenation
  21 //
  22 AArch64TargetStreamer::AArch64TargetStreamer(MCStreamer &S)
  23     : MCTargetStreamer(S), ConstantPools(new AssemblerConstantPools()) {}
  24
  25 AArch64TargetStreamer::~AArch64TargetStreamer() = default;
  26
  27 // The constant pool handling is shared by all AArch64TargetStreamer
  28 // implementations.
  29 const MCExpr *AArch64TargetStreamer::addConstantPoolEntry(const MCExpr *Expr,
  30                                                           unsigned Size,
  31                                                           SMLoc Loc) {
  32   return ConstantPools->addEntry(Streamer, Expr, Size, Loc);
  33 }
  34
  35 void AArch64TargetStreamer::emitCurrentConstantPool() {
  36   ConstantPools->emitForCurrentSection(Streamer);
  37 }
  38
  39 // finish() - write out any non-empty assembler constant pools.
  40 void AArch64TargetStreamer::finish() { ConstantPools->emitAll(Streamer); }
  41
  42 void AArch64TargetStreamer::emitInst(uint32_t Inst) {
  43   char Buffer[4];
  44
  45   // We can't just use EmitIntValue here, as that will swap the
  46   // endianness on big-endian systems (instructions are always
  47   // little-endian).
  48   for (unsigned I = 0; I < 4; ++I) {
  49     Buffer[I] = uint8_t(Inst);
  50     Inst >>= 8;
  51   }
  52
  53   getStreamer().EmitBytes(StringRef(Buffer, 4));
  54 }