1 //===-- MachineCodeEmitter.cpp - Implement the MachineCodeEmitter itf -----===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the MachineCodeEmitter interface.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/MachineCodeEmitter.h"
15 #include "llvm/CodeGen/MachineFunction.h"
16 #include "llvm/Function.h"
23 struct DebugMachineCodeEmitter : public MachineCodeEmitter {
24 void startFunction(MachineFunction &F) {
25 std::cout << "\n**** Writing machine code for function: "
26 << F.getFunction()->getName() << "\n";
28 void finishFunction(MachineFunction &F) {
31 void startFunctionStub(unsigned StubSize) {
32 std::cout << "\n--- Function stub:\n";
34 void *finishFunctionStub(const Function *F) {
35 std::cout << "\n--- End of stub for Function\n";
39 void emitByte(unsigned char B) {
40 std::cout << "0x" << std::hex << (unsigned int)B << std::dec << " ";
42 void emitWord(unsigned W) {
43 std::cout << "0x" << std::hex << W << std::dec << " ";
45 void emitWordAt(unsigned W, unsigned *Ptr) {
46 std::cout << "0x" << std::hex << W << std::dec << " (at "
47 << (void*) Ptr << ") ";
50 void addRelocation(const MachineRelocation &MR) {
51 std::cout << "<relocation> ";
54 virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment)
57 uint64_t getConstantPoolEntryAddress(unsigned Num) { return 0; }
58 uint64_t getCurrentPCValue() { return 0; }
59 uint64_t getCurrentPCOffset() { return 0; }
62 class FilePrinterEmitter : public MachineCodeEmitter {
65 MachineCodeEmitter &MCE;
70 FilePrinterEmitter(MachineCodeEmitter &M, std::ostream &os)
71 : o(os), MCE(M), counter(0) {
75 ~FilePrinterEmitter() {
81 actual.open("lli.actual.obj");
83 std::cerr << "Cannot open 'lli.actual.obj' for writing\n";
88 void startFunction(MachineFunction &F) {
89 // resolve any outstanding calls
92 void finishFunction(MachineFunction &F) {
93 MCE.finishFunction(F);
96 void emitConstantPool(MachineConstantPool *MCP) {
97 MCE.emitConstantPool(MCP);
100 void startFunctionStub(unsigned StubSize) {
101 MCE.startFunctionStub(StubSize);
104 void *finishFunctionStub(const Function *F) {
105 return MCE.finishFunctionStub(F);
108 void emitByte(unsigned char B) {
110 actual << B; actual.flush();
112 values[counter] = (unsigned int) B;
113 if (++counter % 4 == 0 && counter != 0) {
115 for (unsigned i=0; i<4; ++i) {
116 if (values[i] < 16) o << "0";
117 o << values[i] << " ";
120 o << std::dec << "\t";
121 for (unsigned i=0; i<4; ++i) {
122 for (int j=7; j>=0; --j) {
123 o << ((values[i] >> j) & 1);
131 for (unsigned i=0; i<4; ++i)
132 instr |= values[i] << (i*8);
134 o << "--- * --- * --- * --- * ---\n";
139 void emitWord(unsigned W) {
142 void emitWordAt(unsigned W, unsigned *Ptr) {
143 MCE.emitWordAt(W, Ptr);
145 uint64_t getConstantPoolEntryAddress(unsigned Num) {
146 return MCE.getConstantPoolEntryAddress(Num);
149 virtual unsigned char* allocateGlobal(unsigned size, unsigned alignment)
150 { return MCE.allocateGlobal(size, alignment); }
152 uint64_t getCurrentPCValue() {
153 return MCE.getCurrentPCValue();
155 uint64_t getCurrentPCOffset() {
156 return MCE.getCurrentPCOffset();
158 void addRelocation(const MachineRelocation &MR) {
159 return MCE.addRelocation(MR);
164 /// createDebugMachineCodeEmitter - Return a dynamically allocated machine
165 /// code emitter, which just prints the opcodes and fields out the cout. This
166 /// can be used for debugging users of the MachineCodeEmitter interface.
169 MachineCodeEmitter::createDebugEmitter() {
170 return new DebugMachineCodeEmitter();
174 MachineCodeEmitter::createFilePrinterEmitter(MachineCodeEmitter &MCE) {
175 return new FilePrinterEmitter(MCE, std::cerr);