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/MC/MCExpr.h"
22 #include "llvm/MC/MCInstBuilder.h"
23 #include "llvm/MC/MCStreamer.h"
24 #include "llvm/Support/TargetRegistry.h"
25 #include "llvm/Target/Mangler.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) {
32 return MCInstBuilder(Opcode)
33 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(0).getReg()))
34 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(1).getReg()))
35 .addImm(MI->getOperand(2).getImm());
38 // Return an RI instruction like MI with opcode Opcode, but with the
39 // GR64 register operands turned into GRH32s.
40 static MCInst lowerRIHigh(const MachineInstr *MI, unsigned Opcode) {
41 return MCInstBuilder(Opcode)
42 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(0).getReg()))
43 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(1).getReg()))
44 .addImm(MI->getOperand(2).getImm());
47 // Return an RI instruction like MI with opcode Opcode, but with the
48 // R2 register turned into a GR64.
49 static MCInst lowerRIEfLow(const MachineInstr *MI, unsigned Opcode) {
50 return MCInstBuilder(Opcode)
51 .addReg(MI->getOperand(0).getReg())
52 .addReg(MI->getOperand(1).getReg())
53 .addReg(SystemZMC::getRegAsGR64(MI->getOperand(2).getReg()))
54 .addImm(MI->getOperand(3).getImm())
55 .addImm(MI->getOperand(4).getImm())
56 .addImm(MI->getOperand(5).getImm());
59 void SystemZAsmPrinter::EmitInstruction(const MachineInstr *MI) {
60 SystemZMCInstLower Lower(Mang, MF->getContext(), *this);
62 switch (MI->getOpcode()) {
64 LoweredMI = MCInstBuilder(SystemZ::BR).addReg(SystemZ::R14D);
67 case SystemZ::CallBRASL:
68 LoweredMI = MCInstBuilder(SystemZ::BRASL)
69 .addReg(SystemZ::R14D)
70 .addExpr(Lower.getExpr(MI->getOperand(0), MCSymbolRefExpr::VK_PLT));
73 case SystemZ::CallBASR:
74 LoweredMI = MCInstBuilder(SystemZ::BASR)
75 .addReg(SystemZ::R14D)
76 .addReg(MI->getOperand(0).getReg());
80 LoweredMI = MCInstBuilder(SystemZ::JG)
81 .addExpr(Lower.getExpr(MI->getOperand(0), MCSymbolRefExpr::VK_PLT));
85 LoweredMI = MCInstBuilder(SystemZ::BR).addReg(SystemZ::R1D);
89 LoweredMI = MCInstBuilder(SystemZ::IILF)
90 .addReg(SystemZMC::getRegAsGR32(MI->getOperand(0).getReg()))
91 .addImm(MI->getOperand(2).getImm());
95 LoweredMI = MCInstBuilder(SystemZ::IIHF)
96 .addReg(SystemZMC::getRegAsGRH32(MI->getOperand(0).getReg()))
97 .addImm(MI->getOperand(2).getImm());
100 case SystemZ::RISBHH:
101 case SystemZ::RISBHL:
102 LoweredMI = lowerRIEfLow(MI, SystemZ::RISBHG);
105 case SystemZ::RISBLH:
106 case SystemZ::RISBLL:
107 LoweredMI = lowerRIEfLow(MI, SystemZ::RISBLG);
110 #define LOWER_LOW(NAME) \
111 case SystemZ::NAME##64: LoweredMI = lowerRILow(MI, SystemZ::NAME); break
125 #define LOWER_HIGH(NAME) \
126 case SystemZ::NAME##64: LoweredMI = lowerRIHigh(MI, SystemZ::NAME); break
134 Lower.lower(MI, LoweredMI);
137 OutStreamer.EmitInstruction(LoweredMI);
140 // Convert a SystemZ-specific constant pool modifier into the associated
141 // MCSymbolRefExpr variant kind.
142 static MCSymbolRefExpr::VariantKind
143 getModifierVariantKind(SystemZCP::SystemZCPModifier Modifier) {
145 case SystemZCP::NTPOFF: return MCSymbolRefExpr::VK_NTPOFF;
147 llvm_unreachable("Invalid SystemCPModifier!");
150 void SystemZAsmPrinter::
151 EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
152 SystemZConstantPoolValue *ZCPV =
153 static_cast<SystemZConstantPoolValue*>(MCPV);
156 MCSymbolRefExpr::Create(Mang->getSymbol(ZCPV->getGlobalValue()),
157 getModifierVariantKind(ZCPV->getModifier()),
159 uint64_t Size = TM.getDataLayout()->getTypeAllocSize(ZCPV->getType());
161 OutStreamer.EmitValue(Expr, Size);
164 bool SystemZAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
167 const char *ExtraCode,
169 if (ExtraCode && *ExtraCode == 'n') {
170 if (!MI->getOperand(OpNo).isImm())
172 OS << -int64_t(MI->getOperand(OpNo).getImm());
174 SystemZMCInstLower Lower(Mang, MF->getContext(), *this);
175 MCOperand MO(Lower.lowerOperand(MI->getOperand(OpNo)));
176 SystemZInstPrinter::printOperand(MO, OS);
181 bool SystemZAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
184 const char *ExtraCode,
186 SystemZInstPrinter::printAddress(MI->getOperand(OpNo).getReg(),
187 MI->getOperand(OpNo + 1).getImm(),
188 MI->getOperand(OpNo + 2).getReg(), OS);
192 void SystemZAsmPrinter::EmitEndOfAsmFile(Module &M) {
193 if (Subtarget->isTargetELF()) {
194 const TargetLoweringObjectFileELF &TLOFELF =
195 static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
197 MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
199 // Output stubs for external and common global variables.
200 MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
201 if (!Stubs.empty()) {
202 OutStreamer.SwitchSection(TLOFELF.getDataRelSection());
203 const DataLayout *TD = TM.getDataLayout();
205 for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
206 OutStreamer.EmitLabel(Stubs[i].first);
207 OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(),
208 TD->getPointerSize(0));
215 // Force static initialization.
216 extern "C" void LLVMInitializeSystemZAsmPrinter() {
217 RegisterAsmPrinter<SystemZAsmPrinter> X(TheSystemZTarget);