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llvm-6502/lib/Target/ARM/InstPrinter/ARMInstPrinter.cpp
Jim Grosbach 93b3eff623 Thumb assembly parsing and encoding for LDM instruction. 
Fix base register type and canonicallize to the "ldm" spelling rather than
"ldmia." Add diagnostics for incorrect writeback token and out-of-range
registers.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137986 91177308-0d34-0410-b5e6-96231b3b80d8
2011-08-18 21:50:53 +00:00

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//===-- ARMInstPrinter.cpp - Convert ARM 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 ARM MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
#include "ARMInstPrinter.h"
#include "MCTargetDesc/ARMBaseInfo.h"
#include "MCTargetDesc/ARMAddressingModes.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
#define GET_INSTRUCTION_NAME
#include "ARMGenAsmWriter.inc"
/// translateShiftImm - Convert shift immediate from 0-31 to 1-32 for printing.
///
/// getSORegOffset returns an integer from 0-31, but '0' should actually be printed
/// 32 as the immediate shouldbe within the range 1-32.
static unsigned translateShiftImm(unsigned imm) {
if (imm == 0)
return 32;
return imm;
}
StringRef ARMInstPrinter::getOpcodeName(unsigned Opcode) const {
return getInstructionName(Opcode);
}
void ARMInstPrinter::printRegName(raw_ostream &OS, unsigned RegNo) const {
OS << getRegisterName(RegNo);
}
void ARMInstPrinter::printInst(const MCInst *MI, raw_ostream &O) {
unsigned Opcode = MI->getOpcode();
// Check for MOVs and print canonical forms, instead.
if (Opcode == ARM::MOVsr) {
// FIXME: Thumb variants?
const MCOperand &Dst = MI->getOperand(0);
const MCOperand &MO1 = MI->getOperand(1);
const MCOperand &MO2 = MI->getOperand(2);
const MCOperand &MO3 = MI->getOperand(3);
O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO3.getImm()));
printSBitModifierOperand(MI, 6, O);
printPredicateOperand(MI, 4, O);
O << '\t' << getRegisterName(Dst.getReg())
<< ", " << getRegisterName(MO1.getReg());
O << ", " << getRegisterName(MO2.getReg());
assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
return;
}
if (Opcode == ARM::MOVsi) {
// FIXME: Thumb variants?
const MCOperand &Dst = MI->getOperand(0);
const MCOperand &MO1 = MI->getOperand(1);
const MCOperand &MO2 = MI->getOperand(2);
O << '\t' << ARM_AM::getShiftOpcStr(ARM_AM::getSORegShOp(MO2.getImm()));
printSBitModifierOperand(MI, 5, O);
printPredicateOperand(MI, 3, O);
O << '\t' << getRegisterName(Dst.getReg())
<< ", " << getRegisterName(MO1.getReg());
if (ARM_AM::getSORegShOp(MO2.getImm()) == ARM_AM::rrx)
return;
O << ", #" << translateShiftImm(ARM_AM::getSORegOffset(MO2.getImm()));
return;
}
// A8.6.123 PUSH
if ((Opcode == ARM::STMDB_UPD || Opcode == ARM::t2STMDB_UPD) &&
MI->getOperand(0).getReg() == ARM::SP) {
O << '\t' << "push";
printPredicateOperand(MI, 2, O);
if (Opcode == ARM::t2STMDB_UPD)
O << ".w";
O << '\t';
printRegisterList(MI, 4, O);
return;
}
if (Opcode == ARM::STR_PRE_IMM && MI->getOperand(2).getReg() == ARM::SP &&
MI->getOperand(3).getImm() == -4) {
O << '\t' << "push";
printPredicateOperand(MI, 4, O);
O << "\t{" << getRegisterName(MI->getOperand(1).getReg()) << "}";
return;
}
// A8.6.122 POP
if ((Opcode == ARM::LDMIA_UPD || Opcode == ARM::t2LDMIA_UPD) &&
MI->getOperand(0).getReg() == ARM::SP) {
O << '\t' << "pop";
printPredicateOperand(MI, 2, O);
if (Opcode == ARM::t2LDMIA_UPD)
O << ".w";
O << '\t';
printRegisterList(MI, 4, O);
return;
}
if (Opcode == ARM::LDR_POST_IMM && MI->getOperand(2).getReg() == ARM::SP &&
MI->getOperand(4).getImm() == 4) {
O << '\t' << "pop";
printPredicateOperand(MI, 5, O);
O << "\t{" << getRegisterName(MI->getOperand(0).getReg()) << "}";
return;
}
// A8.6.355 VPUSH
if ((Opcode == ARM::VSTMSDB_UPD || Opcode == ARM::VSTMDDB_UPD) &&
MI->getOperand(0).getReg() == ARM::SP) {
O << '\t' << "vpush";
printPredicateOperand(MI, 2, O);
O << '\t';
printRegisterList(MI, 4, O);
return;
}
// A8.6.354 VPOP
if ((Opcode == ARM::VLDMSIA_UPD || Opcode == ARM::VLDMDIA_UPD) &&
MI->getOperand(0).getReg() == ARM::SP) {
O << '\t' << "vpop";
printPredicateOperand(MI, 2, O);
O << '\t';
printRegisterList(MI, 4, O);
return;
}
if (Opcode == ARM::tLDMIA || Opcode == ARM::tSTMIA) {
bool Writeback = true;
unsigned BaseReg = MI->getOperand(0).getReg();
for (unsigned i = 3; i < MI->getNumOperands(); ++i) {
if (MI->getOperand(i).getReg() == BaseReg)
Writeback = false;
}
if (Opcode == ARM::tLDMIA)
O << "\tldm";
else if (Opcode == ARM::tSTMIA)
O << "\tstm";
else
llvm_unreachable("Unknown opcode!");
printPredicateOperand(MI, 1, O);
O << '\t' << getRegisterName(BaseReg);
if (Writeback) O << "!";
O << ", ";
printRegisterList(MI, 3, O);
return;
}
printInstruction(MI, O);
}
void ARMInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNo);
if (Op.isReg()) {
unsigned Reg = Op.getReg();
O << getRegisterName(Reg);
} else if (Op.isImm()) {
O << '#' << Op.getImm();
} else {
assert(Op.isExpr() && "unknown operand kind in printOperand");
O << *Op.getExpr();
}
}
// so_reg is a 4-operand unit corresponding to register forms of the A5.1
// "Addressing Mode 1 - Data-processing operands" forms. This includes:
// REG 0 0 - e.g. R5
// REG REG 0,SH_OPC - e.g. R5, ROR R3
// REG 0 IMM,SH_OPC - e.g. R5, LSL #3
void ARMInstPrinter::printSORegRegOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
const MCOperand &MO3 = MI->getOperand(OpNum+2);
O << getRegisterName(MO1.getReg());
// Print the shift opc.
ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO3.getImm());
O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
if (ShOpc == ARM_AM::rrx)
return;
O << ' ' << getRegisterName(MO2.getReg());
assert(ARM_AM::getSORegOffset(MO3.getImm()) == 0);
}
void ARMInstPrinter::printSORegImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
O << getRegisterName(MO1.getReg());
// Print the shift opc.
ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO2.getImm());
O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
if (ShOpc == ARM_AM::rrx)
return;
O << " #" << translateShiftImm(ARM_AM::getSORegOffset(MO2.getImm()));
}
//===--------------------------------------------------------------------===//
// Addressing Mode #2
//===--------------------------------------------------------------------===//
void ARMInstPrinter::printAM2PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(Op);
const MCOperand &MO2 = MI->getOperand(Op+1);
const MCOperand &MO3 = MI->getOperand(Op+2);
O << "[" << getRegisterName(MO1.getReg());
if (!MO2.getReg()) {
if (ARM_AM::getAM2Offset(MO3.getImm())) // Don't print +0.
O << ", #"
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
<< ARM_AM::getAM2Offset(MO3.getImm());
O << "]";
return;
}
O << ", "
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
<< getRegisterName(MO2.getReg());
if (unsigned ShImm = ARM_AM::getAM2Offset(MO3.getImm()))
O << ", "
<< ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO3.getImm()))
<< " #" << ShImm;
O << "]";
}
void ARMInstPrinter::printAM2PostIndexOp(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(Op);
const MCOperand &MO2 = MI->getOperand(Op+1);
const MCOperand &MO3 = MI->getOperand(Op+2);
O << "[" << getRegisterName(MO1.getReg()) << "], ";
if (!MO2.getReg()) {
unsigned ImmOffs = ARM_AM::getAM2Offset(MO3.getImm());
O << '#'
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
<< ImmOffs;
return;
}
O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO3.getImm()))
<< getRegisterName(MO2.getReg());
if (unsigned ShImm = ARM_AM::getAM2Offset(MO3.getImm()))
O << ", "
<< ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO3.getImm()))
<< " #" << ShImm;
}
void ARMInstPrinter::printAddrMode2Operand(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(Op);
if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
printOperand(MI, Op, O);
return;
}
const MCOperand &MO3 = MI->getOperand(Op+2);
unsigned IdxMode = ARM_AM::getAM2IdxMode(MO3.getImm());
if (IdxMode == ARMII::IndexModePost) {
printAM2PostIndexOp(MI, Op, O);
return;
}
printAM2PreOrOffsetIndexOp(MI, Op, O);
}
void ARMInstPrinter::printAddrMode2OffsetOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
if (!MO1.getReg()) {
unsigned ImmOffs = ARM_AM::getAM2Offset(MO2.getImm());
O << '#'
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
<< ImmOffs;
return;
}
O << ARM_AM::getAddrOpcStr(ARM_AM::getAM2Op(MO2.getImm()))
<< getRegisterName(MO1.getReg());
if (unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm()))
O << ", "
<< ARM_AM::getShiftOpcStr(ARM_AM::getAM2ShiftOpc(MO2.getImm()))
<< " #" << ShImm;
}
//===--------------------------------------------------------------------===//
// Addressing Mode #3
//===--------------------------------------------------------------------===//
void ARMInstPrinter::printAM3PostIndexOp(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(Op);
const MCOperand &MO2 = MI->getOperand(Op+1);
const MCOperand &MO3 = MI->getOperand(Op+2);
O << "[" << getRegisterName(MO1.getReg()) << "], ";
if (MO2.getReg()) {
O << (char)ARM_AM::getAM3Op(MO3.getImm())
<< getRegisterName(MO2.getReg());
return;
}
unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm());
O << '#'
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
<< ImmOffs;
}
void ARMInstPrinter::printAM3PreOrOffsetIndexOp(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(Op);
const MCOperand &MO2 = MI->getOperand(Op+1);
const MCOperand &MO3 = MI->getOperand(Op+2);
O << '[' << getRegisterName(MO1.getReg());
if (MO2.getReg()) {
O << ", " << getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
<< getRegisterName(MO2.getReg()) << ']';
return;
}
if (unsigned ImmOffs = ARM_AM::getAM3Offset(MO3.getImm()))
O << ", #"
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO3.getImm()))
<< ImmOffs;
O << ']';
}
void ARMInstPrinter::printAddrMode3Operand(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO3 = MI->getOperand(Op+2);
unsigned IdxMode = ARM_AM::getAM3IdxMode(MO3.getImm());
if (IdxMode == ARMII::IndexModePost) {
printAM3PostIndexOp(MI, Op, O);
return;
}
printAM3PreOrOffsetIndexOp(MI, Op, O);
}
void ARMInstPrinter::printAddrMode3OffsetOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
if (MO1.getReg()) {
O << getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()))
<< getRegisterName(MO1.getReg());
return;
}
unsigned ImmOffs = ARM_AM::getAM3Offset(MO2.getImm());
O << '#'
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM3Op(MO2.getImm()))
<< ImmOffs;
}
void ARMInstPrinter::printPostIdxImm8Operand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
unsigned Imm = MO.getImm();
O << '#' << ((Imm & 256) ? "" : "-") << (Imm & 0xff);
}
void ARMInstPrinter::printPostIdxRegOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
O << (MO2.getImm() ? "" : "-") << getRegisterName(MO1.getReg());
}
void ARMInstPrinter::printPostIdxImm8s4Operand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
unsigned Imm = MO.getImm();
O << '#' << ((Imm & 256) ? "" : "-") << ((Imm & 0xff) << 2);
}
void ARMInstPrinter::printLdStmModeOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
ARM_AM::AMSubMode Mode = ARM_AM::getAM4SubMode(MI->getOperand(OpNum)
.getImm());
O << ARM_AM::getAMSubModeStr(Mode);
}
void ARMInstPrinter::printAddrMode5Operand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
printOperand(MI, OpNum, O);
return;
}
O << "[" << getRegisterName(MO1.getReg());
if (unsigned ImmOffs = ARM_AM::getAM5Offset(MO2.getImm())) {
O << ", #"
<< ARM_AM::getAddrOpcStr(ARM_AM::getAM5Op(MO2.getImm()))
<< ImmOffs * 4;
}
O << "]";
}
void ARMInstPrinter::printAddrMode6Operand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
O << "[" << getRegisterName(MO1.getReg());
if (MO2.getImm()) {
// FIXME: Both darwin as and GNU as violate ARM docs here.
O << ", :" << (MO2.getImm() << 3);
}
O << "]";
}
void ARMInstPrinter::printAddrMode7Operand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
O << "[" << getRegisterName(MO1.getReg()) << "]";
}
void ARMInstPrinter::printAddrMode6OffsetOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
if (MO.getReg() == 0)
O << "!";
else
O << ", " << getRegisterName(MO.getReg());
}
void ARMInstPrinter::printBitfieldInvMaskImmOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
uint32_t v = ~MO.getImm();
int32_t lsb = CountTrailingZeros_32(v);
int32_t width = (32 - CountLeadingZeros_32 (v)) - lsb;
assert(MO.isImm() && "Not a valid bf_inv_mask_imm value!");
O << '#' << lsb << ", #" << width;
}
void ARMInstPrinter::printMemBOption(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned val = MI->getOperand(OpNum).getImm();
O << ARM_MB::MemBOptToString(val);
}
void ARMInstPrinter::printShiftImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned ShiftOp = MI->getOperand(OpNum).getImm();
bool isASR = (ShiftOp & (1 << 5)) != 0;
unsigned Amt = ShiftOp & 0x1f;
if (isASR)
O << ", asr #" << (Amt == 0 ? 32 : Amt);
else if (Amt)
O << ", lsl #" << Amt;
}
void ARMInstPrinter::printPKHLSLShiftImm(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNum).getImm();
if (Imm == 0)
return;
assert(Imm > 0 && Imm < 32 && "Invalid PKH shift immediate value!");
O << ", lsl #" << Imm;
}
void ARMInstPrinter::printPKHASRShiftImm(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNum).getImm();
// A shift amount of 32 is encoded as 0.
if (Imm == 0)
Imm = 32;
assert(Imm > 0 && Imm <= 32 && "Invalid PKH shift immediate value!");
O << ", asr #" << Imm;
}
void ARMInstPrinter::printRegisterList(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
O << "{";
for (unsigned i = OpNum, e = MI->getNumOperands(); i != e; ++i) {
if (i != OpNum) O << ", ";
O << getRegisterName(MI->getOperand(i).getReg());
}
O << "}";
}
void ARMInstPrinter::printSetendOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNum);
if (Op.getImm())
O << "be";
else
O << "le";
}
void ARMInstPrinter::printCPSIMod(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNum);
O << ARM_PROC::IModToString(Op.getImm());
}
void ARMInstPrinter::printCPSIFlag(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNum);
unsigned IFlags = Op.getImm();
for (int i=2; i >= 0; --i)
if (IFlags & (1 << i))
O << ARM_PROC::IFlagsToString(1 << i);
}
void ARMInstPrinter::printMSRMaskOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &Op = MI->getOperand(OpNum);
unsigned SpecRegRBit = Op.getImm() >> 4;
unsigned Mask = Op.getImm() & 0xf;
// As special cases, CPSR_f, CPSR_s and CPSR_fs prefer printing as
// APSR_nzcvq, APSR_g and APSRnzcvqg, respectively.
if (!SpecRegRBit && (Mask == 8 || Mask == 4 || Mask == 12)) {
O << "APSR_";
switch (Mask) {
default: assert(0);
case 4: O << "g"; return;
case 8: O << "nzcvq"; return;
case 12: O << "nzcvqg"; return;
}
llvm_unreachable("Unexpected mask value!");
}
if (SpecRegRBit)
O << "SPSR";
else
O << "CPSR";
if (Mask) {
O << '_';
if (Mask & 8) O << 'f';
if (Mask & 4) O << 's';
if (Mask & 2) O << 'x';
if (Mask & 1) O << 'c';
}
}
void ARMInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
if (CC != ARMCC::AL)
O << ARMCondCodeToString(CC);
}
void ARMInstPrinter::printMandatoryPredicateOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
ARMCC::CondCodes CC = (ARMCC::CondCodes)MI->getOperand(OpNum).getImm();
O << ARMCondCodeToString(CC);
}
void ARMInstPrinter::printSBitModifierOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
if (MI->getOperand(OpNum).getReg()) {
assert(MI->getOperand(OpNum).getReg() == ARM::CPSR &&
"Expect ARM CPSR register!");
O << 's';
}
}
void ARMInstPrinter::printNoHashImmediate(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
O << MI->getOperand(OpNum).getImm();
}
void ARMInstPrinter::printPImmediate(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
O << "p" << MI->getOperand(OpNum).getImm();
}
void ARMInstPrinter::printCImmediate(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
O << "c" << MI->getOperand(OpNum).getImm();
}
void ARMInstPrinter::printPCLabel(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
llvm_unreachable("Unhandled PC-relative pseudo-instruction!");
}
void ARMInstPrinter::printThumbS4ImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
O << "#" << MI->getOperand(OpNum).getImm() * 4;
}
void ARMInstPrinter::printThumbSRImm(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNum).getImm();
O << "#" << (Imm == 0 ? 32 : Imm);
}
void ARMInstPrinter::printThumbITMask(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
// (3 - the number of trailing zeros) is the number of then / else.
unsigned Mask = MI->getOperand(OpNum).getImm();
unsigned CondBit0 = Mask >> 4 & 1;
unsigned NumTZ = CountTrailingZeros_32(Mask);
assert(NumTZ <= 3 && "Invalid IT mask!");
for (unsigned Pos = 3, e = NumTZ; Pos > e; --Pos) {
bool T = ((Mask >> Pos) & 1) == CondBit0;
if (T)
O << 't';
else
O << 'e';
}
}
void ARMInstPrinter::printThumbAddrModeRROperand(const MCInst *MI, unsigned Op,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(Op);
const MCOperand &MO2 = MI->getOperand(Op + 1);
if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
printOperand(MI, Op, O);
return;
}
O << "[" << getRegisterName(MO1.getReg());
if (unsigned RegNum = MO2.getReg())
O << ", " << getRegisterName(RegNum);
O << "]";
}
void ARMInstPrinter::printThumbAddrModeImm5SOperand(const MCInst *MI,
unsigned Op,
raw_ostream &O,
unsigned Scale) {
const MCOperand &MO1 = MI->getOperand(Op);
const MCOperand &MO2 = MI->getOperand(Op + 1);
if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
printOperand(MI, Op, O);
return;
}
O << "[" << getRegisterName(MO1.getReg());
if (unsigned ImmOffs = MO2.getImm())
O << ", #" << ImmOffs * Scale;
O << "]";
}
void ARMInstPrinter::printThumbAddrModeImm5S1Operand(const MCInst *MI,
unsigned Op,
raw_ostream &O) {
printThumbAddrModeImm5SOperand(MI, Op, O, 1);
}
void ARMInstPrinter::printThumbAddrModeImm5S2Operand(const MCInst *MI,
unsigned Op,
raw_ostream &O) {
printThumbAddrModeImm5SOperand(MI, Op, O, 2);
}
void ARMInstPrinter::printThumbAddrModeImm5S4Operand(const MCInst *MI,
unsigned Op,
raw_ostream &O) {
printThumbAddrModeImm5SOperand(MI, Op, O, 4);
}
void ARMInstPrinter::printThumbAddrModeSPOperand(const MCInst *MI, unsigned Op,
raw_ostream &O) {
printThumbAddrModeImm5SOperand(MI, Op, O, 4);
}
// Constant shifts t2_so_reg is a 2-operand unit corresponding to the Thumb2
// register with shift forms.
// REG 0 0 - e.g. R5
// REG IMM, SH_OPC - e.g. R5, LSL #3
void ARMInstPrinter::printT2SOOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
unsigned Reg = MO1.getReg();
O << getRegisterName(Reg);
// Print the shift opc.
assert(MO2.isImm() && "Not a valid t2_so_reg value!");
ARM_AM::ShiftOpc ShOpc = ARM_AM::getSORegShOp(MO2.getImm());
O << ", " << ARM_AM::getShiftOpcStr(ShOpc);
if (ShOpc != ARM_AM::rrx)
O << " #" << translateShiftImm(ARM_AM::getSORegOffset(MO2.getImm()));
}
void ARMInstPrinter::printAddrModeImm12Operand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
if (!MO1.isReg()) { // FIXME: This is for CP entries, but isn't right.
printOperand(MI, OpNum, O);
return;
}
O << "[" << getRegisterName(MO1.getReg());
int32_t OffImm = (int32_t)MO2.getImm();
bool isSub = OffImm < 0;
// Special value for #-0. All others are normal.
if (OffImm == INT32_MIN)
OffImm = 0;
if (isSub)
O << ", #-" << -OffImm;
else if (OffImm > 0)
O << ", #" << OffImm;
O << "]";
}
void ARMInstPrinter::printT2AddrModeImm8Operand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
O << "[" << getRegisterName(MO1.getReg());
int32_t OffImm = (int32_t)MO2.getImm();
// Don't print +0.
if (OffImm < 0)
O << ", #-" << -OffImm;
else if (OffImm > 0)
O << ", #" << OffImm;
O << "]";
}
void ARMInstPrinter::printT2AddrModeImm8s4Operand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
O << "[" << getRegisterName(MO1.getReg());
int32_t OffImm = (int32_t)MO2.getImm() / 4;
// Don't print +0.
if (OffImm < 0)
O << ", #-" << -OffImm * 4;
else if (OffImm > 0)
O << ", #" << OffImm * 4;
O << "]";
}
void ARMInstPrinter::printT2AddrModeImm8OffsetOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
int32_t OffImm = (int32_t)MO1.getImm();
// Don't print +0.
if (OffImm < 0)
O << "#-" << -OffImm;
else if (OffImm > 0)
O << "#" << OffImm;
}
void ARMInstPrinter::printT2AddrModeImm8s4OffsetOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
int32_t OffImm = (int32_t)MO1.getImm() / 4;
// Don't print +0.
if (OffImm < 0)
O << "#-" << -OffImm * 4;
else if (OffImm > 0)
O << "#" << OffImm * 4;
}
void ARMInstPrinter::printT2AddrModeSoRegOperand(const MCInst *MI,
unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO1 = MI->getOperand(OpNum);
const MCOperand &MO2 = MI->getOperand(OpNum+1);
const MCOperand &MO3 = MI->getOperand(OpNum+2);
O << "[" << getRegisterName(MO1.getReg());
assert(MO2.getReg() && "Invalid so_reg load / store address!");
O << ", " << getRegisterName(MO2.getReg());
unsigned ShAmt = MO3.getImm();
if (ShAmt) {
assert(ShAmt <= 3 && "Not a valid Thumb2 addressing mode!");
O << ", lsl #" << ShAmt;
}
O << "]";
}
void ARMInstPrinter::printVFPf32ImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
O << '#';
if (MO.isFPImm()) {
O << (float)MO.getFPImm();
} else {
union {
uint32_t I;
float F;
} FPUnion;
FPUnion.I = MO.getImm();
O << FPUnion.F;
}
}
void ARMInstPrinter::printVFPf64ImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
const MCOperand &MO = MI->getOperand(OpNum);
O << '#';
if (MO.isFPImm()) {
O << MO.getFPImm();
} else {
// We expect the binary encoding of a floating point number here.
union {
uint64_t I;
double D;
} FPUnion;
FPUnion.I = MO.getImm();
O << FPUnion.D;
}
}
void ARMInstPrinter::printNEONModImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned EncodedImm = MI->getOperand(OpNum).getImm();
unsigned EltBits;
uint64_t Val = ARM_AM::decodeNEONModImm(EncodedImm, EltBits);
O << "#0x" << utohexstr(Val);
}
void ARMInstPrinter::printImmPlusOneOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNum).getImm();
O << "#" << Imm + 1;
}
void ARMInstPrinter::printRotImmOperand(const MCInst *MI, unsigned OpNum,
raw_ostream &O) {
unsigned Imm = MI->getOperand(OpNum).getImm();
if (Imm == 0)
return;
O << ", ror #";
switch (Imm) {
default: assert (0 && "illegal ror immediate!");
case 1: O << "8"; break;
case 2: O << "16"; break;
case 3: O << "24"; break;
}
}
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