1 //===-- MipsTargetStreamer.cpp - Mips Target Streamer Methods -------------===//
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 // This file provides Mips specific target streamer methods.
12 //===----------------------------------------------------------------------===//
14 #include "InstPrinter/MipsInstPrinter.h"
15 #include "MipsTargetStreamer.h"
16 #include "MipsMCTargetDesc.h"
17 #include "llvm/MC/MCELF.h"
18 #include "llvm/MC/MCSymbol.h"
19 #include "llvm/MC/MCSubtargetInfo.h"
20 #include "llvm/Support/CommandLine.h"
21 #include "llvm/Support/ELF.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/FormattedStream.h"
27 // Pin vtable to this file.
28 void MipsTargetStreamer::anchor() {}
30 MipsTargetStreamer::MipsTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
32 MipsTargetAsmStreamer::MipsTargetAsmStreamer(MCStreamer &S,
33 formatted_raw_ostream &OS)
34 : MipsTargetStreamer(S), OS(OS) {}
36 void MipsTargetAsmStreamer::emitDirectiveSetMicroMips() {
37 OS << "\t.set\tmicromips\n";
40 void MipsTargetAsmStreamer::emitDirectiveSetNoMicroMips() {
41 OS << "\t.set\tnomicromips\n";
44 void MipsTargetAsmStreamer::emitDirectiveSetMips16() {
45 OS << "\t.set\tmips16\n";
48 void MipsTargetAsmStreamer::emitDirectiveSetNoMips16() {
49 OS << "\t.set\tnomips16\n";
52 void MipsTargetAsmStreamer::emitDirectiveSetReorder() {
53 OS << "\t.set\treorder\n";
56 void MipsTargetAsmStreamer::emitDirectiveSetNoReorder() {
57 OS << "\t.set\tnoreorder\n";
60 void MipsTargetAsmStreamer::emitDirectiveSetMacro() {
61 OS << "\t.set\tmacro\n";
64 void MipsTargetAsmStreamer::emitDirectiveSetNoMacro() {
65 OS << "\t.set\tnomacro\n";
68 void MipsTargetAsmStreamer::emitDirectiveSetAt() {
72 void MipsTargetAsmStreamer::emitDirectiveSetNoAt() {
73 OS << "\t.set\tnoat\n";
76 void MipsTargetAsmStreamer::emitDirectiveEnd(StringRef Name) {
77 OS << "\t.end\t" << Name << '\n';
80 void MipsTargetAsmStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
81 OS << "\t.ent\t" << Symbol.getName() << '\n';
84 void MipsTargetAsmStreamer::emitDirectiveAbiCalls() { OS << "\t.abicalls\n"; }
85 void MipsTargetAsmStreamer::emitDirectiveOptionPic0() {
86 OS << "\t.option\tpic0\n";
89 void MipsTargetAsmStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
92 << StringRef(MipsInstPrinter::getRegisterName(StackReg)).lower() << ","
94 << StringRef(MipsInstPrinter::getRegisterName(ReturnReg)).lower() << '\n';
97 // Print a 32 bit hex number with all numbers.
98 static void printHex32(unsigned Value, raw_ostream &OS) {
100 for (int i = 7; i >= 0; i--)
101 OS.write_hex((Value & (0xF << (i*4))) >> (i*4));
104 void MipsTargetAsmStreamer::emitMask(unsigned CPUBitmask,
105 int CPUTopSavedRegOff) {
107 printHex32(CPUBitmask, OS);
108 OS << ',' << CPUTopSavedRegOff << '\n';
111 void MipsTargetAsmStreamer::emitFMask(unsigned FPUBitmask,
112 int FPUTopSavedRegOff) {
114 printHex32(FPUBitmask, OS);
115 OS << "," << FPUTopSavedRegOff << '\n';
118 // This part is for ELF object output.
119 MipsTargetELFStreamer::MipsTargetELFStreamer(MCStreamer &S,
120 const MCSubtargetInfo &STI)
121 : MipsTargetStreamer(S), MicroMipsEnabled(false) {
122 MCAssembler &MCA = getStreamer().getAssembler();
123 uint64_t Features = STI.getFeatureBits();
124 Triple T(STI.getTargetTriple());
126 // Update e_header flags
130 if (Features & Mips::FeatureMips64r2)
131 EFlags |= ELF::EF_MIPS_ARCH_64R2;
132 else if (Features & Mips::FeatureMips64)
133 EFlags |= ELF::EF_MIPS_ARCH_64;
134 else if (Features & Mips::FeatureMips32r2)
135 EFlags |= ELF::EF_MIPS_ARCH_32R2;
136 else if (Features & Mips::FeatureMips32)
137 EFlags |= ELF::EF_MIPS_ARCH_32;
139 if (T.isArch64Bit()) {
140 if (Features & Mips::FeatureN32)
141 EFlags |= ELF::EF_MIPS_ABI2;
142 else if (Features & Mips::FeatureO32) {
143 EFlags |= ELF::EF_MIPS_ABI_O32;
144 EFlags |= ELF::EF_MIPS_32BITMODE; /* Compatibility Mode */
146 // No need to set any bit for N64 which is the default ABI at the moment
147 // for 64-bit Mips architectures.
149 if (Features & Mips::FeatureMips64r2 || Features & Mips::FeatureMips64)
150 EFlags |= ELF::EF_MIPS_32BITMODE;
153 EFlags |= ELF::EF_MIPS_ABI_O32;
156 MCA.setELFHeaderEFlags(EFlags);
159 void MipsTargetELFStreamer::emitLabel(MCSymbol *Symbol) {
160 if (!isMicroMipsEnabled())
162 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(Symbol);
163 uint8_t Type = MCELF::GetType(Data);
164 if (Type != ELF::STT_FUNC)
167 // The "other" values are stored in the last 6 bits of the second byte
168 // The traditional defines for STO values assume the full byte and thus
169 // the shift to pack it.
170 MCELF::setOther(Data, ELF::STO_MIPS_MICROMIPS >> 2);
173 MCELFStreamer &MipsTargetELFStreamer::getStreamer() {
174 return static_cast<MCELFStreamer &>(Streamer);
177 void MipsTargetELFStreamer::emitDirectiveSetMicroMips() {
178 MicroMipsEnabled = true;
180 MCAssembler &MCA = getStreamer().getAssembler();
181 unsigned Flags = MCA.getELFHeaderEFlags();
182 Flags |= ELF::EF_MIPS_MICROMIPS;
183 MCA.setELFHeaderEFlags(Flags);
186 void MipsTargetELFStreamer::emitDirectiveSetNoMicroMips() {
187 MicroMipsEnabled = false;
190 void MipsTargetELFStreamer::emitDirectiveSetMips16() {
191 MCAssembler &MCA = getStreamer().getAssembler();
192 unsigned Flags = MCA.getELFHeaderEFlags();
193 Flags |= ELF::EF_MIPS_ARCH_ASE_M16;
194 MCA.setELFHeaderEFlags(Flags);
197 void MipsTargetELFStreamer::emitDirectiveSetNoMips16() {
201 void MipsTargetELFStreamer::emitDirectiveSetReorder() {
205 void MipsTargetELFStreamer::emitDirectiveSetNoReorder() {
206 MCAssembler &MCA = getStreamer().getAssembler();
207 unsigned Flags = MCA.getELFHeaderEFlags();
208 Flags |= ELF::EF_MIPS_NOREORDER;
209 MCA.setELFHeaderEFlags(Flags);
212 void MipsTargetELFStreamer::emitDirectiveSetMacro() {
216 void MipsTargetELFStreamer::emitDirectiveSetNoMacro() {
220 void MipsTargetELFStreamer::emitDirectiveSetAt() {
224 void MipsTargetELFStreamer::emitDirectiveSetNoAt() {
228 void MipsTargetELFStreamer::emitDirectiveEnd(StringRef Name) {
232 void MipsTargetELFStreamer::emitDirectiveEnt(const MCSymbol &Symbol) {
236 void MipsTargetELFStreamer::emitDirectiveAbiCalls() {
237 MCAssembler &MCA = getStreamer().getAssembler();
238 unsigned Flags = MCA.getELFHeaderEFlags();
239 Flags |= ELF::EF_MIPS_CPIC | ELF::EF_MIPS_PIC;
240 MCA.setELFHeaderEFlags(Flags);
242 void MipsTargetELFStreamer::emitDirectiveOptionPic0() {
243 MCAssembler &MCA = getStreamer().getAssembler();
244 unsigned Flags = MCA.getELFHeaderEFlags();
245 Flags &= ~ELF::EF_MIPS_PIC;
246 MCA.setELFHeaderEFlags(Flags);
249 void MipsTargetELFStreamer::emitFrame(unsigned StackReg, unsigned StackSize,
250 unsigned ReturnReg) {
254 void MipsTargetELFStreamer::emitMask(unsigned CPUBitmask,
255 int CPUTopSavedRegOff) {
259 void MipsTargetELFStreamer::emitFMask(unsigned FPUBitmask,
260 int FPUTopSavedRegOff) {