1 //===-- SystemZAsmPrinter.cpp - SystemZ LLVM assembly printer -------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // Streams SystemZ assembly language and associated data, in the form of
11 // MCInsts and MCExprs respectively.
13 //===----------------------------------------------------------------------===//
15 #include "SystemZAsmPrinter.h"
16 #include "InstPrinter/SystemZInstPrinter.h"
17 #include "SystemZConstantPoolValue.h"
18 #include "SystemZMCInstLower.h"
19 #include "llvm/CodeGen/MachineModuleInfoImpls.h"
20 #include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
21 #include "llvm/IR/Mangler.h"
22 #include "llvm/MC/MCExpr.h"
23 #include "llvm/MC/MCInstBuilder.h"
24 #include "llvm/MC/MCStreamer.h"
25 #include "llvm/Support/TargetRegistry.h"
29 // Return an RI instruction like MI with opcode Opcode, but with the
30 // GR64 register operands turned into GR32s.
31 static MCInst lowerRILow(const MachineInstr *MI, unsigned Opcode) {
33 return MCInstBuilder(Opcode)
34 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(0).getReg()))
35 .addImm(MI->getOperand(1).getImm());
37 return MCInstBuilder(Opcode)
38 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(0).getReg()))
39 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(1).getReg()))
40 .addImm(MI->getOperand(2).getImm());
43 // Return an RI instruction like MI with opcode Opcode, but with the
44 // GR64 register operands turned into GRH32s.
45 static MCInst lowerRIHigh(const MachineInstr *MI, unsigned Opcode) {
47 return MCInstBuilder(Opcode)
48 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(0).getReg()))
49 .addImm(MI->getOperand(1).getImm());
51 return MCInstBuilder(Opcode)
52 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(0).getReg()))
53 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(1).getReg()))
54 .addImm(MI->getOperand(2).getImm());
57 // Return an RI instruction like MI with opcode Opcode, but with the
58 // R2 register turned into a GR64.
59 static MCInst lowerRIEfLow(const MachineInstr *MI, unsigned Opcode) {
60 return MCInstBuilder(Opcode)
61 .addReg(MI->getOperand(0).getReg())
62 .addReg(MI->getOperand(1).getReg())
63 .addReg(SystemZMC::getRegAsGR64(MI->getOperand(2).getReg()))
64 .addImm(MI->getOperand(3).getImm())
65 .addImm(MI->getOperand(4).getImm())
66 .addImm(MI->getOperand(5).getImm());
69 void SystemZAsmPrinter::EmitInstruction(const MachineInstr *MI) {
70 SystemZMCInstLower Lower(MF->getContext(), *this);
72 switch (MI->getOpcode()) {
74 LoweredMI = MCInstBuilder(SystemZ::BR).addReg(SystemZ::R14D);
77 case SystemZ::CallBRASL:
78 LoweredMI = MCInstBuilder(SystemZ::BRASL)
79 .addReg(SystemZ::R14D)
80 .addExpr(Lower.getExpr(MI->getOperand(0), MCSymbolRefExpr::VK_PLT));
83 case SystemZ::CallBASR:
84 LoweredMI = MCInstBuilder(SystemZ::BASR)
85 .addReg(SystemZ::R14D)
86 .addReg(MI->getOperand(0).getReg());
90 LoweredMI = MCInstBuilder(SystemZ::JG)
91 .addExpr(Lower.getExpr(MI->getOperand(0), MCSymbolRefExpr::VK_PLT));
95 LoweredMI = MCInstBuilder(SystemZ::BR).addReg(SystemZ::R1D);
99 LoweredMI = MCInstBuilder(SystemZ::IILF)
100 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(0).getReg()))
101 .addImm(MI->getOperand(2).getImm());
104 case SystemZ::IIHF64:
105 LoweredMI = MCInstBuilder(SystemZ::IIHF)
106 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(0).getReg()))
107 .addImm(MI->getOperand(2).getImm());
110 case SystemZ::RISBHH:
111 case SystemZ::RISBHL:
112 LoweredMI = lowerRIEfLow(MI, SystemZ::RISBHG);
115 case SystemZ::RISBLH:
116 case SystemZ::RISBLL:
117 LoweredMI = lowerRIEfLow(MI, SystemZ::RISBLG);
120 #define LOWER_LOW(NAME) \
121 case SystemZ::NAME##64: LoweredMI = lowerRILow(MI, SystemZ::NAME); break
137 #define LOWER_HIGH(NAME) \
138 case SystemZ::NAME##64: LoweredMI = lowerRIHigh(MI, SystemZ::NAME); break
154 case SystemZ::Serialize:
155 if (Subtarget->hasFastSerialization())
156 LoweredMI = MCInstBuilder(SystemZ::AsmBCR)
157 .addImm(14).addReg(SystemZ::R0D);
159 LoweredMI = MCInstBuilder(SystemZ::AsmBCR)
160 .addImm(15).addReg(SystemZ::R0D);
164 Lower.lower(MI, LoweredMI);
167 EmitToStreamer(OutStreamer, LoweredMI);
170 // Convert a SystemZ-specific constant pool modifier into the associated
171 // MCSymbolRefExpr variant kind.
172 static MCSymbolRefExpr::VariantKind
173 getModifierVariantKind(SystemZCP::SystemZCPModifier Modifier) {
175 case SystemZCP::NTPOFF: return MCSymbolRefExpr::VK_NTPOFF;
177 llvm_unreachable("Invalid SystemCPModifier!");
180 void SystemZAsmPrinter::
181 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
182 auto *ZCPV = static_cast<SystemZConstantPoolValue*>(MCPV);
185 MCSymbolRefExpr::Create(getSymbol(ZCPV->getGlobalValue()),
186 getModifierVariantKind(ZCPV->getModifier()),
189 TM.getSubtargetImpl()->getDataLayout()->getTypeAllocSize(ZCPV->getType());
191 OutStreamer.EmitValue(Expr, Size);
194 bool SystemZAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
197 const char *ExtraCode,
199 if (ExtraCode && *ExtraCode == 'n') {
200 if (!MI->getOperand(OpNo).isImm())
202 OS << -int64_t(MI->getOperand(OpNo).getImm());
204 SystemZMCInstLower Lower(MF->getContext(), *this);
205 MCOperand MO(Lower.lowerOperand(MI->getOperand(OpNo)));
206 SystemZInstPrinter::printOperand(MO, OS);
211 bool SystemZAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
214 const char *ExtraCode,
216 SystemZInstPrinter::printAddress(MI->getOperand(OpNo).getReg(),
217 MI->getOperand(OpNo + 1).getImm(),
218 MI->getOperand(OpNo + 2).getReg(), OS);
222 void SystemZAsmPrinter::EmitEndOfAsmFile(Module &M) {
223 if (Subtarget->isTargetELF()) {
225 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
227 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
229 // Output stubs for external and common global variables.
230 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
231 if (!Stubs.empty()) {
232 OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
233 const DataLayout *TD = TM.getSubtargetImpl()->getDataLayout();
235 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
236 OutStreamer.EmitLabel(Stubs[i].first);
237 OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
238 TD->getPointerSize(0));
245 // Force static initialization.
246 extern "C" void LLVMInitializeSystemZAsmPrinter() {
247 RegisterAsmPrinter<SystemZAsmPrinter> X(TheSystemZTarget);