1 //===-- XCoreInstPrinter.cpp - Convert XCore MCInst to assembly syntax ----===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This class prints an XCore MCInst to a .s file.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "XCoreInstPrinter.h"
15 #include "llvm/ADT/StringExtras.h"
16 #include "llvm/MC/MCExpr.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/MC/MCInstrInfo.h"
19 #include "llvm/MC/MCSymbol.h"
20 #include "llvm/Support/ErrorHandling.h"
21 #include "llvm/Support/raw_ostream.h"
22 using namespace llvm;
23
24 #define DEBUG_TYPE "asm-printer"
25
26 #include "XCoreGenAsmWriter.inc"
27
printRegName(raw_ostream & OS,unsigned RegNo) const28 void XCoreInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
29 OS << StringRef(getRegisterName(RegNo)).lower();
30 }
31
printInst(const MCInst * MI,raw_ostream & O,StringRef Annot,const MCSubtargetInfo & STI)32 void XCoreInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
33 StringRef Annot, const MCSubtargetInfo &STI) {
34 printInstruction(MI, O);
35 printAnnotation(O, Annot);
36 }
37
38 void XCoreInstPrinter::
printInlineJT(const MCInst * MI,int opNum,raw_ostream & O)39 printInlineJT(const MCInst *MI, int opNum, raw_ostream &O) {
40 report_fatal_error("can't handle InlineJT");
41 }
42
43 void XCoreInstPrinter::
printInlineJT32(const MCInst * MI,int opNum,raw_ostream & O)44 printInlineJT32(const MCInst *MI, int opNum, raw_ostream &O) {
45 report_fatal_error("can't handle InlineJT32");
46 }
47
printExpr(const MCExpr * Expr,const MCAsmInfo * MAI,raw_ostream & OS)48 static void printExpr(const MCExpr *Expr, const MCAsmInfo *MAI,
49 raw_ostream &OS) {
50 int Offset = 0;
51 const MCSymbolRefExpr *SRE;
52
53 if (const MCBinaryExpr *BE = dyn_cast<MCBinaryExpr>(Expr)) {
54 SRE = dyn_cast<MCSymbolRefExpr>(BE->getLHS());
55 const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(BE->getRHS());
56 assert(SRE && CE && "Binary expression must be sym+const.");
57 Offset = CE->getValue();
58 } else {
59 SRE = dyn_cast<MCSymbolRefExpr>(Expr);
60 assert(SRE && "Unexpected MCExpr type.");
61 }
62 assert(SRE->getKind() == MCSymbolRefExpr::VK_None);
63
64 SRE->getSymbol().print(OS, MAI);
65
66 if (Offset) {
67 if (Offset > 0)
68 OS << '+';
69 OS << Offset;
70 }
71 }
72
73 void XCoreInstPrinter::
printOperand(const MCInst * MI,unsigned OpNo,raw_ostream & O)74 printOperand(const MCInst *MI, unsigned OpNo, raw_ostream &O) {
75 const MCOperand &Op = MI->getOperand(OpNo);
76 if (Op.isReg()) {
77 printRegName(O, Op.getReg());
78 return;
79 }
80
81 if (Op.isImm()) {
82 O << Op.getImm();
83 return;
84 }
85
86 assert(Op.isExpr() && "unknown operand kind in printOperand");
87 printExpr(Op.getExpr(), &MAI, O);
88 }
89