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//===-- MipsInstPrinter.cpp - Convert Mips MCInst to assembly syntax ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class prints an Mips MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
#include "MipsInstPrinter.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
#include "MipsGenAsmWriter.inc"
const char* Mips::MipsFCCToString(Mips::CondCode CC) {
switch (CC) {
case FCOND_F:
case FCOND_T: return "f";
case FCOND_UN:
case FCOND_OR: return "un";
case FCOND_OEQ:
case FCOND_UNE: return "eq";
case FCOND_UEQ:
case FCOND_ONE: return "ueq";
case FCOND_OLT:
case FCOND_UGE: return "olt";
case FCOND_ULT:
case FCOND_OGE: return "ult";
case FCOND_OLE:
case FCOND_UGT: return "ole";
case FCOND_ULE:
case FCOND_OGT: return "ule";
case FCOND_SF:
case FCOND_ST: return "sf";
case FCOND_NGLE:
case FCOND_GLE: return "ngle";
case FCOND_SEQ:
case FCOND_SNE: return "seq";
case FCOND_NGL:
case FCOND_GL: return "ngl";
case FCOND_LT:
case FCOND_NLT: return "lt";
case FCOND_NGE:
case FCOND_GE: return "nge";
case FCOND_LE:
case FCOND_NLE: return "le";
case FCOND_NGT:
case FCOND_GT: return "ngt";
}
llvm_unreachable("Impossible condition code!");
}
void MipsInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
OS << '$' << StringRef(getRegisterName(RegNo)).lower();
}
void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
StringRef Annot) {
printInstruction(MI, O);
printAnnotation(O, Annot);
}
static void printExpr(const MCExpr *Expr, raw_ostream &OS) {
int Offset = 0;
const MCSymbolRefExpr *SRE;
if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
assert(SRE && CE && "Binary expression must be sym+const.");
Offset = CE->getValue();
}
else if (!(SRE = dyn_cast<MCSymbolRefExpr>(Expr)))
assert(false && "Unexpected MCExpr type.");
MCSymbolRefExpr::VariantKind Kind = SRE->getKind();
switch (Kind) {
default: llvm_unreachable("Invalid kind!");
case MCSymbolRefExpr::VK_None: break;
case MCSymbolRefExpr::VK_Mips_GPREL: OS << "%gp_rel("; break;
case MCSymbolRefExpr::VK_Mips_GOT_CALL: OS << "%call16("; break;
case MCSymbolRefExpr::VK_Mips_GOT16: OS << "%got("; break;
case MCSymbolRefExpr::VK_Mips_GOT: OS << "%got("; break;
case MCSymbolRefExpr::VK_Mips_ABS_HI: OS << "%hi("; break;
case MCSymbolRefExpr::VK_Mips_ABS_LO: OS << "%lo("; break;
case MCSymbolRefExpr::VK_Mips_TLSGD: OS << "%tlsgd("; break;
case MCSymbolRefExpr::VK_Mips_TLSLDM: OS << "%tlsldm("; break;
case MCSymbolRefExpr::VK_Mips_DTPREL_HI: OS << "%dtprel_hi("; break;
case MCSymbolRefExpr::VK_Mips_DTPREL_LO: OS << "%dtprel_lo("; break;
case MCSymbolRefExpr::VK_Mips_GOTTPREL: OS << "%gottprel("; break;
case MCSymbolRefExpr::VK_Mips_TPREL_HI: OS << "%tprel_hi("; break;
case MCSymbolRefExpr::VK_Mips_TPREL_LO: OS << "%tprel_lo("; break;
case MCSymbolRefExpr::VK_Mips_GPOFF_HI: OS << "%hi(%neg(%gp_rel("; break;
case MCSymbolRefExpr::VK_Mips_GPOFF_LO: OS << "%lo(%neg(%gp_rel("; break;
case MCSymbolRefExpr::VK_Mips_GOT_DISP: OS << "%got_disp("; break;
case MCSymbolRefExpr::VK_Mips_GOT_PAGE: OS << "%got_page("; break;
case MCSymbolRefExpr::VK_Mips_GOT_OFST: OS << "%got_ofst("; break;
}
OS << SRE->getSymbol();
if (Offset) {
if (Offset > 0)
OS << '+';
OS << Offset;
}
if ((Kind == MCSymbolRefExpr::VK_Mips_GPOFF_HI) ||
(Kind == MCSymbolRefExpr::VK_Mips_GPOFF_LO))
OS << ")))";
else if (Kind != MCSymbolRefExpr::VK_None)
OS << ')';
}
void MipsInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNo);
if (Op.isReg()) {
printRegName(O, Op.getReg());
return;
}
if (Op.isImm()) {
O << Op.getImm();
return;
}
assert(Op.isExpr() && "unknown operand kind in printOperand");
printExpr(Op.getExpr(), O);
}
void MipsInstPrinter::printUnsignedImm(const MCInst *MI, int opNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(opNum);
if (MO.isImm())
O << (unsigned short int)MO.getImm();
else
printOperand(MI, opNum, O);
}
void MipsInstPrinter::
printMemOperand(const MCInst *MI, int opNum, raw_ostream &O) {
// Load/Store memory operands -- imm($reg)
// If PIC target the target is loaded as the
// pattern lw $25,%call16($28)
printOperand(MI, opNum+1, O);
O << "(";
printOperand(MI, opNum, O);
O << ")";
}
void MipsInstPrinter::
printMemOperandEA(const MCInst *MI, int opNum, raw_ostream &O) {
// when using stack locations for not load/store instructions
// print the same way as all normal 3 operand instructions.
printOperand(MI, opNum, O);
O << ", ";
printOperand(MI, opNum+1, O);
return;
}
void MipsInstPrinter::
printFCCOperand(const MCInst *MI, int opNum, raw_ostream &O) {
const MCOperand& MO = MI->getOperand(opNum);
O << MipsFCCToString((Mips::CondCode)MO.getImm());
}
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