1 //===-- SPUAsmPrinter.cpp - Print machine instrs to Cell SPU assembly -------=//
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 contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to Cell SPU assembly language. This printer
12 // is the output mechanism used by `llc'.
14 //===----------------------------------------------------------------------===//
16 #define DEBUG_TYPE "asmprinter"
18 #include "SPUTargetMachine.h"
19 #include "llvm/Constants.h"
20 #include "llvm/DerivedTypes.h"
21 #include "llvm/Module.h"
22 #include "llvm/CodeGen/AsmPrinter.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/MC/MCStreamer.h"
25 #include "llvm/MC/MCAsmInfo.h"
26 #include "llvm/MC/MCSymbol.h"
27 #include "llvm/Target/Mangler.h"
28 #include "llvm/Target/TargetLoweringObjectFile.h"
29 #include "llvm/Target/TargetInstrInfo.h"
30 #include "llvm/Target/TargetOptions.h"
31 #include "llvm/Target/TargetRegisterInfo.h"
32 #include "llvm/ADT/SmallString.h"
33 #include "llvm/ADT/StringExtras.h"
34 #include "llvm/Support/ErrorHandling.h"
35 #include "llvm/Support/TargetRegistry.h"
36 #include "llvm/Support/raw_ostream.h"
40 class SPUAsmPrinter : public AsmPrinter {
42 explicit SPUAsmPrinter(TargetMachine &TM, MCStreamer &Streamer) :
43 AsmPrinter(TM, Streamer) {}
45 virtual const char *getPassName() const {
46 return "STI CBEA SPU Assembly Printer";
49 /// printInstruction - This method is automatically generated by tablegen
50 /// from the instruction set description.
51 void printInstruction(const MachineInstr *MI, raw_ostream &OS);
52 static const char *getRegisterName(unsigned RegNo);
55 void EmitInstruction(const MachineInstr *MI) {
57 raw_svector_ostream OS(Str);
58 printInstruction(MI, OS);
59 OutStreamer.EmitRawText(OS.str());
61 void printOp(const MachineOperand &MO, raw_ostream &OS);
63 void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
64 const MachineOperand &MO = MI->getOperand(OpNo);
66 O << getRegisterName(MO.getReg());
67 } else if (MO.isImm()) {
74 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
75 unsigned AsmVariant, const char *ExtraCode,
77 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
78 unsigned AsmVariant, const char *ExtraCode,
83 printU7ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
85 unsigned int value = MI->getOperand(OpNo).getImm();
86 assert(value < (1 << 8) && "Invalid u7 argument");
91 printShufAddr(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
93 char value = MI->getOperand(OpNo).getImm();
96 printOperand(MI, OpNo+1, O);
101 printS16ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
103 O << (short) MI->getOperand(OpNo).getImm();
107 printU16ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
109 O << (unsigned short)MI->getOperand(OpNo).getImm();
113 printMemRegReg(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
114 // When used as the base register, r0 reads constant zero rather than
115 // the value contained in the register. For this reason, the darwin
116 // assembler requires that we print r0 as 0 (no r) when used as the base.
117 const MachineOperand &MO = MI->getOperand(OpNo);
118 O << getRegisterName(MO.getReg()) << ", ";
119 printOperand(MI, OpNo+1, O);
123 printU18ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
125 unsigned int value = MI->getOperand(OpNo).getImm();
126 assert(value <= (1 << 19) - 1 && "Invalid u18 argument");
131 printS10ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
133 short value = (short) (((int) MI->getOperand(OpNo).getImm() << 16)
135 assert((value >= -(1 << 9) && value <= (1 << 9) - 1)
136 && "Invalid s10 argument");
141 printU10ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
143 short value = (short) (((int) MI->getOperand(OpNo).getImm() << 16)
145 assert((value <= (1 << 10) - 1) && "Invalid u10 argument");
150 printDFormAddr(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
152 assert(MI->getOperand(OpNo).isImm() &&
153 "printDFormAddr first operand is not immediate");
154 int64_t value = int64_t(MI->getOperand(OpNo).getImm());
155 int16_t value16 = int16_t(value);
156 assert((value16 >= -(1 << (9+4)) && value16 <= (1 << (9+4)) - 1)
157 && "Invalid dform s10 offset argument");
158 O << (value16 & ~0xf) << "(";
159 printOperand(MI, OpNo+1, O);
164 printAddr256K(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
166 /* Note: operand 1 is an offset or symbol name. */
167 if (MI->getOperand(OpNo).isImm()) {
168 printS16ImmOperand(MI, OpNo, O);
170 printOp(MI->getOperand(OpNo), O);
171 if (MI->getOperand(OpNo+1).isImm()) {
172 int displ = int(MI->getOperand(OpNo+1).getImm());
181 void printCallOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
182 printOp(MI->getOperand(OpNo), O);
185 void printHBROperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
186 printOp(MI->getOperand(OpNo), O);
189 void printPCRelativeOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
190 // Used to generate a ".-<target>", but it turns out that the assembler
191 // really wants the target.
193 // N.B.: This operand is used for call targets. Branch hints are another
195 printOp(MI->getOperand(OpNo), O);
198 void printSymbolHi(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
199 if (MI->getOperand(OpNo).isImm()) {
200 printS16ImmOperand(MI, OpNo, O);
202 printOp(MI->getOperand(OpNo), O);
207 void printSymbolLo(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
208 if (MI->getOperand(OpNo).isImm()) {
209 printS16ImmOperand(MI, OpNo, O);
211 printOp(MI->getOperand(OpNo), O);
216 /// Print local store address
217 void printSymbolLSA(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
218 printOp(MI->getOperand(OpNo), O);
221 void printROTHNeg7Imm(const MachineInstr *MI, unsigned OpNo,
223 if (MI->getOperand(OpNo).isImm()) {
224 int value = (int) MI->getOperand(OpNo).getImm();
225 assert((value >= 0 && value < 16)
226 && "Invalid negated immediate rotate 7-bit argument");
229 llvm_unreachable("Invalid/non-immediate rotate amount in printRotateNeg7Imm");
233 void printROTNeg7Imm(const MachineInstr *MI, unsigned OpNo, raw_ostream &O){
234 assert(MI->getOperand(OpNo).isImm() &&
235 "Invalid/non-immediate rotate amount in printRotateNeg7Imm");
236 int value = (int) MI->getOperand(OpNo).getImm();
237 assert((value >= 0 && value <= 32)
238 && "Invalid negated immediate rotate 7-bit argument");
242 } // end of anonymous namespace
244 // Include the auto-generated portion of the assembly writer
245 #include "SPUGenAsmWriter.inc"
247 void SPUAsmPrinter::printOp(const MachineOperand &MO, raw_ostream &O) {
248 switch (MO.getType()) {
249 case MachineOperand::MO_Immediate:
250 report_fatal_error("printOp() does not handle immediate values");
253 case MachineOperand::MO_MachineBasicBlock:
254 O << *MO.getMBB()->getSymbol();
256 case MachineOperand::MO_JumpTableIndex:
257 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
258 << '_' << MO.getIndex();
260 case MachineOperand::MO_ConstantPoolIndex:
261 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
262 << '_' << MO.getIndex();
264 case MachineOperand::MO_ExternalSymbol:
265 // Computing the address of an external symbol, not calling it.
266 if (TM.getRelocationModel() != Reloc::Static) {
267 O << "L" << MAI->getGlobalPrefix() << MO.getSymbolName()
271 O << *GetExternalSymbolSymbol(MO.getSymbolName());
273 case MachineOperand::MO_GlobalAddress:
274 // External or weakly linked global variables need non-lazily-resolved
276 if (TM.getRelocationModel() != Reloc::Static) {
277 const GlobalValue *GV = MO.getGlobal();
278 if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
279 GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
280 O << *GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
284 O << *Mang->getSymbol(MO.getGlobal());
286 case MachineOperand::MO_MCSymbol:
287 O << *(MO.getMCSymbol());
290 O << "<unknown operand type: " << MO.getType() << ">";
295 /// PrintAsmOperand - Print out an operand for an inline asm expression.
297 bool SPUAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
299 const char *ExtraCode, raw_ostream &O) {
300 // Does this asm operand have a single letter operand modifier?
301 if (ExtraCode && ExtraCode[0]) {
302 if (ExtraCode[1] != 0) return true; // Unknown modifier.
304 switch (ExtraCode[0]) {
305 default: return true; // Unknown modifier.
306 case 'L': // Write second word of DImode reference.
307 // Verify that this operand has two consecutive registers.
308 if (!MI->getOperand(OpNo).isReg() ||
309 OpNo+1 == MI->getNumOperands() ||
310 !MI->getOperand(OpNo+1).isReg())
312 ++OpNo; // Return the high-part.
317 printOperand(MI, OpNo, O);
321 bool SPUAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
322 unsigned OpNo, unsigned AsmVariant,
323 const char *ExtraCode,
325 if (ExtraCode && ExtraCode[0])
326 return true; // Unknown modifier.
327 printMemRegReg(MI, OpNo, O);
331 // Force static initialization.
332 extern "C" void LLVMInitializeCellSPUAsmPrinter() {
333 RegisterAsmPrinter<SPUAsmPrinter> X(TheCellSPUTarget);