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//===-- SPUAsmPrinter.cpp - Print machine instrs to Cell SPU assembly -------=//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains a printer that converts from our internal representation
// of machine-dependent LLVM code to Cell SPU assembly language. This printer
// is the output mechanism used by `llc'.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asmprinter"
#include "SPU.h"
#include "SPUTargetMachine.h"
#include "llvm/Constants.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/Mangler.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetRegistry.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
namespace {
class SPUAsmPrinter : public AsmPrinter {
public:
explicit SPUAsmPrinter(TargetMachine &TM, MCStreamer &Streamer) :
AsmPrinter(TM, Streamer) {}
virtual const char *getPassName() const {
return "STI CBEA SPU Assembly Printer";
}
SPUTargetMachine &getTM() {
return static_cast<SPUTargetMachine&>(TM);
}
/// printInstruction - This method is automatically generated by tablegen
/// from the instruction set description.
void printInstruction(const MachineInstr *MI, raw_ostream &OS);
static const char *getRegisterName(unsigned RegNo);
void EmitInstruction(const MachineInstr *MI) {
SmallString<128> Str;
raw_svector_ostream OS(Str);
printInstruction(MI, OS);
OutStreamer.EmitRawText(OS.str());
}
void printOp(const MachineOperand &MO, raw_ostream &OS);
/// printRegister - Print register according to target requirements.
///
void printRegister(const MachineOperand &MO, bool R0AsZero, raw_ostream &O){
unsigned RegNo = MO.getReg();
assert(TargetRegisterInfo::isPhysicalRegister(RegNo) &&
"Not physreg??");
O << getRegisterName(RegNo);
}
void printOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
const MachineOperand &MO = MI->getOperand(OpNo);
if (MO.isReg()) {
O << getRegisterName(MO.getReg());
} else if (MO.isImm()) {
O << MO.getImm();
} else {
printOp(MO, O);
}
}
bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O);
bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant, const char *ExtraCode,
raw_ostream &O);
void
printS7ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
int value = MI->getOperand(OpNo).getImm();
value = (value << (32 - 7)) >> (32 - 7);
assert((value >= -(1 << 8) && value <= (1 << 7) - 1)
&& "Invalid s7 argument");
O << value;
}
void
printU7ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
unsigned int value = MI->getOperand(OpNo).getImm();
assert(value < (1 << 8) && "Invalid u7 argument");
O << value;
}
void
printShufAddr(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
char value = MI->getOperand(OpNo).getImm();
O << (int) value;
O << "(";
printOperand(MI, OpNo+1, O);
O << ")";
}
void
printS16ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
O << (short) MI->getOperand(OpNo).getImm();
}
void
printU16ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
O << (unsigned short)MI->getOperand(OpNo).getImm();
}
void
printU32ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
O << (unsigned)MI->getOperand(OpNo).getImm();
}
void
printMemRegReg(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
// When used as the base register, r0 reads constant zero rather than
// the value contained in the register. For this reason, the darwin
// assembler requires that we print r0 as 0 (no r) when used as the base.
const MachineOperand &MO = MI->getOperand(OpNo);
O << getRegisterName(MO.getReg()) << ", ";
printOperand(MI, OpNo+1, O);
}
void
printU18ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
unsigned int value = MI->getOperand(OpNo).getImm();
assert(value <= (1 << 19) - 1 && "Invalid u18 argument");
O << value;
}
void
printS10ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
short value = (short) (((int) MI->getOperand(OpNo).getImm() << 16)
>> 16);
assert((value >= -(1 << 9) && value <= (1 << 9) - 1)
&& "Invalid s10 argument");
O << value;
}
void
printU10ImmOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
short value = (short) (((int) MI->getOperand(OpNo).getImm() << 16)
>> 16);
assert((value <= (1 << 10) - 1) && "Invalid u10 argument");
O << value;
}
void
printDFormAddr(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
assert(MI->getOperand(OpNo).isImm() &&
"printDFormAddr first operand is not immediate");
int64_t value = int64_t(MI->getOperand(OpNo).getImm());
int16_t value16 = int16_t(value);
assert((value16 >= -(1 << (9+4)) && value16 <= (1 << (9+4)) - 1)
&& "Invalid dform s10 offset argument");
O << (value16 & ~0xf) << "(";
printOperand(MI, OpNo+1, O);
O << ")";
}
void
printAddr256K(const MachineInstr *MI, unsigned OpNo, raw_ostream &O)
{
/* Note: operand 1 is an offset or symbol name. */
if (MI->getOperand(OpNo).isImm()) {
printS16ImmOperand(MI, OpNo, O);
} else {
printOp(MI->getOperand(OpNo), O);
if (MI->getOperand(OpNo+1).isImm()) {
int displ = int(MI->getOperand(OpNo+1).getImm());
if (displ > 0)
O << "+" << displ;
else if (displ < 0)
O << displ;
}
}
}
void printCallOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
printOp(MI->getOperand(OpNo), O);
}
void printPCRelativeOperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
// Used to generate a ".-<target>", but it turns out that the assembler
// really wants the target.
//
// N.B.: This operand is used for call targets. Branch hints are another
// animal entirely.
printOp(MI->getOperand(OpNo), O);
}
void printHBROperand(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
// HBR operands are generated in front of branches, hence, the
// program counter plus the target.
O << ".+";
printOp(MI->getOperand(OpNo), O);
}
void printSymbolHi(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
if (MI->getOperand(OpNo).isImm()) {
printS16ImmOperand(MI, OpNo, O);
} else {
printOp(MI->getOperand(OpNo), O);
O << "@h";
}
}
void printSymbolLo(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
if (MI->getOperand(OpNo).isImm()) {
printS16ImmOperand(MI, OpNo, O);
} else {
printOp(MI->getOperand(OpNo), O);
O << "@l";
}
}
/// Print local store address
void printSymbolLSA(const MachineInstr *MI, unsigned OpNo, raw_ostream &O) {
printOp(MI->getOperand(OpNo), O);
}
void printROTHNeg7Imm(const MachineInstr *MI, unsigned OpNo,
raw_ostream &O) {
if (MI->getOperand(OpNo).isImm()) {
int value = (int) MI->getOperand(OpNo).getImm();
assert((value >= 0 && value < 16)
&& "Invalid negated immediate rotate 7-bit argument");
O << -value;
} else {
llvm_unreachable("Invalid/non-immediate rotate amount in printRotateNeg7Imm");
}
}
void printROTNeg7Imm(const MachineInstr *MI, unsigned OpNo, raw_ostream &O){
assert(MI->getOperand(OpNo).isImm() &&
"Invalid/non-immediate rotate amount in printRotateNeg7Imm");
int value = (int) MI->getOperand(OpNo).getImm();
assert((value >= 0 && value <= 32)
&& "Invalid negated immediate rotate 7-bit argument");
O << -value;
}
};
} // end of anonymous namespace
// Include the auto-generated portion of the assembly writer
#include "SPUGenAsmWriter.inc"
void SPUAsmPrinter::printOp(const MachineOperand &MO, raw_ostream &O) {
switch (MO.getType()) {
case MachineOperand::MO_Immediate:
report_fatal_error("printOp() does not handle immediate values");
return;
case MachineOperand::MO_MachineBasicBlock:
O << *MO.getMBB()->getSymbol();
return;
case MachineOperand::MO_JumpTableIndex:
O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
<< '_' << MO.getIndex();
return;
case MachineOperand::MO_ConstantPoolIndex:
O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber()
<< '_' << MO.getIndex();
return;
case MachineOperand::MO_ExternalSymbol:
// Computing the address of an external symbol, not calling it.
if (TM.getRelocationModel() != Reloc::Static) {
O << "L" << MAI->getGlobalPrefix() << MO.getSymbolName()
<< "$non_lazy_ptr";
return;
}
O << *GetExternalSymbolSymbol(MO.getSymbolName());
return;
case MachineOperand::MO_GlobalAddress:
// External or weakly linked global variables need non-lazily-resolved
// stubs
if (TM.getRelocationModel() != Reloc::Static) {
GlobalValue *GV = MO.getGlobal();
if (((GV->isDeclaration() || GV->hasWeakLinkage() ||
GV->hasLinkOnceLinkage() || GV->hasCommonLinkage()))) {
O << *GetSymbolWithGlobalValueBase(GV, "$non_lazy_ptr");
return;
}
}
O << *Mang->getSymbol(MO.getGlobal());
return;
default:
O << "<unknown operand type: " << MO.getType() << ">";
return;
}
}
/// PrintAsmOperand - Print out an operand for an inline asm expression.
///
bool SPUAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
unsigned AsmVariant,
const char *ExtraCode, raw_ostream &O) {
// Does this asm operand have a single letter operand modifier?
if (ExtraCode && ExtraCode[0]) {
if (ExtraCode[1] != 0) return true; // Unknown modifier.
switch (ExtraCode[0]) {
default: return true; // Unknown modifier.
case 'L': // Write second word of DImode reference.
// Verify that this operand has two consecutive registers.
if (!MI->getOperand(OpNo).isReg() ||
OpNo+1 == MI->getNumOperands() ||
!MI->getOperand(OpNo+1).isReg())
return true;
++OpNo; // Return the high-part.
break;
}
}
printOperand(MI, OpNo, O);
return false;
}
bool SPUAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
unsigned OpNo, unsigned AsmVariant,
const char *ExtraCode,
raw_ostream &O) {
if (ExtraCode && ExtraCode[0])
return true; // Unknown modifier.
printMemRegReg(MI, OpNo, O);
return false;
}
// Force static initialization.
extern "C" void LLVMInitializeCellSPUAsmPrinter() {
RegisterAsmPrinter<SPUAsmPrinter> X(TheCellSPUTarget);
}
|