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//==-- SystemZTargetStreamer.cpp - SystemZ Target Streamer Methods ----------=//
//
// 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
//
//===----------------------------------------------------------------------===//
///
/// \file
/// This file defines SystemZ-specific target streamer classes.
/// These are for implementing support for target-specific assembly directives.
///
//===----------------------------------------------------------------------===//
#include "SystemZTargetStreamer.h"
#include "SystemZHLASMAsmStreamer.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCObjectFileInfo.h"
using namespace llvm;
void SystemZTargetStreamer::emitConstantPools() {
// Emit EXRL target instructions.
if (EXRLTargets2Sym.empty())
return;
// Switch to the .text section.
const MCObjectFileInfo &OFI = *Streamer.getContext().getObjectFileInfo();
Streamer.switchSection(OFI.getTextSection());
for (auto &I : EXRLTargets2Sym) {
Streamer.emitLabel(I.second);
const MCInstSTIPair &MCI_STI = I.first;
Streamer.emitInstruction(MCI_STI.first, *MCI_STI.second);
}
EXRLTargets2Sym.clear();
}
SystemZHLASMAsmStreamer &SystemZTargetHLASMStreamer::getHLASMStreamer() {
return static_cast<SystemZHLASMAsmStreamer &>(getStreamer());
}
void SystemZTargetHLASMStreamer::emitExtern(StringRef Sym) {
getStreamer().emitRawText(Twine(" EXTRN ") + Twine(Sym));
}
void SystemZTargetHLASMStreamer::emitEnd() { getHLASMStreamer().emitEnd(); }
// HLASM statements can only perform a single operation at a time
const MCExpr *SystemZTargetHLASMStreamer::createWordDiffExpr(
MCContext &Ctx, const MCSymbol *Hi, const MCSymbol *Lo) {
assert(Hi && Lo && "Symbols required to calculate expression");
MCSymbol *Temp = Ctx.createTempSymbol();
OS << Temp->getName() << " EQU ";
const MCBinaryExpr *TempExpr = MCBinaryExpr::createSub(
MCSymbolRefExpr::create(Hi, Ctx), MCSymbolRefExpr::create(Lo, Ctx), Ctx);
Ctx.getAsmInfo()->printExpr(OS, *TempExpr);
OS << "\n";
return MCBinaryExpr::createLShr(MCSymbolRefExpr::create(Temp, Ctx),
MCConstantExpr::create(1, Ctx), Ctx);
}
const MCExpr *SystemZTargetGOFFStreamer::createWordDiffExpr(
MCContext &Ctx, const MCSymbol *Hi, const MCSymbol *Lo) {
assert(Hi && Lo && "Symbols required to calculate expression");
return MCBinaryExpr::createLShr(
MCBinaryExpr::createSub(MCSymbolRefExpr::create(Hi, Ctx),
MCSymbolRefExpr::create(Lo, Ctx), Ctx),
MCConstantExpr::create(1, Ctx), Ctx);
}
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