1 //===-- MipsInstPrinter.cpp - Convert Mips 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 Mips MCInst to a .s file.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #define DEBUG_TYPE "asm-printer"
15 #include "MipsInstPrinter.h"
16 #include "llvm/MC/MCExpr.h"
17 #include "llvm/MC/MCInst.h"
18 #include "llvm/Support/ErrorHandling.h"
19 #include "llvm/Support/raw_ostream.h"
20 #include "llvm/ADT/StringExtras.h"
21 using namespace llvm;
22
23 #define GET_INSTRUCTION_NAME
24 #include "MipsGenAsmWriter.inc"
25
MipsFCCToString(Mips::CondCode CC)26 const char* Mips::MipsFCCToString(Mips::CondCode CC) {
27 switch (CC) {
28 case FCOND_F:
29 case FCOND_T: return "f";
30 case FCOND_UN:
31 case FCOND_OR: return "un";
32 case FCOND_OEQ:
33 case FCOND_UNE: return "eq";
34 case FCOND_UEQ:
35 case FCOND_ONE: return "ueq";
36 case FCOND_OLT:
37 case FCOND_UGE: return "olt";
38 case FCOND_ULT:
39 case FCOND_OGE: return "ult";
40 case FCOND_OLE:
41 case FCOND_UGT: return "ole";
42 case FCOND_ULE:
43 case FCOND_OGT: return "ule";
44 case FCOND_SF:
45 case FCOND_ST: return "sf";
46 case FCOND_NGLE:
47 case FCOND_GLE: return "ngle";
48 case FCOND_SEQ:
49 case FCOND_SNE: return "seq";
50 case FCOND_NGL:
51 case FCOND_GL: return "ngl";
52 case FCOND_LT:
53 case FCOND_NLT: return "lt";
54 case FCOND_NGE:
55 case FCOND_GE: return "nge";
56 case FCOND_LE:
57 case FCOND_NLE: return "le";
58 case FCOND_NGT:
59 case FCOND_GT: return "ngt";
60 }
61 llvm_unreachable("Impossible condition code!");
62 }
63
getOpcodeName(unsigned Opcode) const64 StringRef MipsInstPrinter::getOpcodeName(unsigned Opcode) const {
65 return getInstructionName(Opcode);
66 }
67
printRegName(raw_ostream & OS,unsigned RegNo) const68 void MipsInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
69 OS << '$' << LowercaseString(getRegisterName(RegNo));
70 }
71
printInst(const MCInst * MI,raw_ostream & O)72 void MipsInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
73 printInstruction(MI, O);
74 }
75
printOperand(const MCInst * MI,unsigned OpNo,raw_ostream & O)76 void MipsInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
77 raw_ostream &O) {
78 const MCOperand &Op = MI->getOperand(OpNo);
79 if (Op.isReg()) {
80 printRegName(O, Op.getReg());
81 return;
82 }
83
84 if (Op.isImm()) {
85 O << Op.getImm();
86 return;
87 }
88
89 assert(Op.isExpr() && "unknown operand kind in printOperand");
90 O << *Op.getExpr();
91 }
92
printUnsignedImm(const MCInst * MI,int opNum,raw_ostream & O)93 void MipsInstPrinter::printUnsignedImm(const MCInst *MI, int opNum,
94 raw_ostream &O) {
95 const MCOperand &MO = MI->getOperand(opNum);
96 if (MO.isImm())
97 O << (unsigned short int)MO.getImm();
98 else
99 printOperand(MI, opNum, O);
100 }
101
102 void MipsInstPrinter::
printMemOperand(const MCInst * MI,int opNum,raw_ostream & O)103 printMemOperand(const MCInst *MI, int opNum, raw_ostream &O) {
104 // Load/Store memory operands -- imm($reg)
105 // If PIC target the target is loaded as the
106 // pattern lw $25,%call16($28)
107 printOperand(MI, opNum+1, O);
108 O << "(";
109 printOperand(MI, opNum, O);
110 O << ")";
111 }
112
113 void MipsInstPrinter::
printMemOperandEA(const MCInst * MI,int opNum,raw_ostream & O)114 printMemOperandEA(const MCInst *MI, int opNum, raw_ostream &O) {
115 // when using stack locations for not load/store instructions
116 // print the same way as all normal 3 operand instructions.
117 printOperand(MI, opNum, O);
118 O << ", ";
119 printOperand(MI, opNum+1, O);
120 return;
121 }
122
123 void MipsInstPrinter::
printFCCOperand(const MCInst * MI,int opNum,raw_ostream & O)124 printFCCOperand(const MCInst *MI, int opNum, raw_ostream &O) {
125 const MCOperand& MO = MI->getOperand(opNum);
126 O << MipsFCCToString((Mips::CondCode)MO.getImm());
127 }
128