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llvm/lib/Target/ARM/ARMBaseInfo.h
Bruno Cardoso Lopes a2b6e4151b Fix encoding and add parsing support for the arm/thumb CPS instruction: 
- Add custom operand matching for imod and iflags.
- Rename SplitMnemonicAndCC to SplitMnemonic since it splits more than CC
  from mnemonic.
- While adding ".w" as an operand, don't change "Head" to avoid passing the
  wrong mnemonic to ParseOperand.
- Add asm parser tests.
- Add disassembler tests just to make sure it can catch all cps versions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125489 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-14 13:09:44 +00:00

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//===-- ARMBaseInfo.h - Top level definitions for ARM -------- --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains small standalone helper functions and enum definitions for
// the ARM target useful for the compiler back-end and the MC libraries.
// As such, it deliberately does not include references to LLVM core
// code gen types, passes, etc..
//
//===----------------------------------------------------------------------===//
#ifndef ARMBASEINFO_H
#define ARMBASEINFO_H
#include "llvm/Support/ErrorHandling.h"
// Note that the following auto-generated files only defined enum types, and
// so are safe to include here.
// Defines symbolic names for ARM registers. This defines a mapping from
// register name to register number.
//
#include "ARMGenRegisterNames.inc"
// Defines symbolic names for the ARM instructions.
//
#include "ARMGenInstrNames.inc"
namespace llvm {
// Enums corresponding to ARM condition codes
namespace ARMCC {
// The CondCodes constants map directly to the 4-bit encoding of the
// condition field for predicated instructions.
enum CondCodes { // Meaning (integer) Meaning (floating-point)
EQ, // Equal Equal
NE, // Not equal Not equal, or unordered
HS, // Carry set >, ==, or unordered
LO, // Carry clear Less than
MI, // Minus, negative Less than
PL, // Plus, positive or zero >, ==, or unordered
VS, // Overflow Unordered
VC, // No overflow Not unordered
HI, // Unsigned higher Greater than, or unordered
LS, // Unsigned lower or same Less than or equal
GE, // Greater than or equal Greater than or equal
LT, // Less than Less than, or unordered
GT, // Greater than Greater than
LE, // Less than or equal <, ==, or unordered
AL // Always (unconditional) Always (unconditional)
};
inline static CondCodes getOppositeCondition(CondCodes CC) {
switch (CC) {
default: llvm_unreachable("Unknown condition code");
case EQ: return NE;
case NE: return EQ;
case HS: return LO;
case LO: return HS;
case MI: return PL;
case PL: return MI;
case VS: return VC;
case VC: return VS;
case HI: return LS;
case LS: return HI;
case GE: return LT;
case LT: return GE;
case GT: return LE;
case LE: return GT;
}
}
} // namespace ARMCC
inline static const char *ARMCondCodeToString(ARMCC::CondCodes CC) {
switch (CC) {
default: llvm_unreachable("Unknown condition code");
case ARMCC::EQ: return "eq";
case ARMCC::NE: return "ne";
case ARMCC::HS: return "hs";
case ARMCC::LO: return "lo";
case ARMCC::MI: return "mi";
case ARMCC::PL: return "pl";
case ARMCC::VS: return "vs";
case ARMCC::VC: return "vc";
case ARMCC::HI: return "hi";
case ARMCC::LS: return "ls";
case ARMCC::GE: return "ge";
case ARMCC::LT: return "lt";
case ARMCC::GT: return "gt";
case ARMCC::LE: return "le";
case ARMCC::AL: return "al";
}
}
namespace ARM_PROC {
enum IMod {
IE = 2,
ID = 3
};
enum IFlags {
F = 1,
I = 2,
A = 4
};
inline static const char *IFlagsToString(unsigned val) {
switch (val) {
default: llvm_unreachable("Unknown iflags operand");
case F: return "f";
case I: return "i";
case A: return "a";
}
}
inline static const char *IModToString(unsigned val) {
switch (val) {
default: llvm_unreachable("Unknown imod operand");
case IE: return "ie";
case ID: return "id";
}
}
}
namespace ARM_MB {
// The Memory Barrier Option constants map directly to the 4-bit encoding of
// the option field for memory barrier operations.
enum MemBOpt {
SY = 15,
ST = 14,
ISH = 11,
ISHST = 10,
NSH = 7,
NSHST = 6,
OSH = 3,
OSHST = 2
};
inline static const char *MemBOptToString(unsigned val) {
switch (val) {
default: llvm_unreachable("Unknown memory operation");
case SY: return "sy";
case ST: return "st";
case ISH: return "ish";
case ISHST: return "ishst";
case NSH: return "nsh";
case NSHST: return "nshst";
case OSH: return "osh";
case OSHST: return "oshst";
}
}
} // namespace ARM_MB
/// getARMRegisterNumbering - Given the enum value for some register, e.g.
/// ARM::LR, return the number that it corresponds to (e.g. 14).
inline static unsigned getARMRegisterNumbering(unsigned Reg) {
using namespace ARM;
switch (Reg) {
default:
llvm_unreachable("Unknown ARM register!");
case R0: case S0: case D0: case Q0: return 0;
case R1: case S1: case D1: case Q1: return 1;
case R2: case S2: case D2: case Q2: return 2;
case R3: case S3: case D3: case Q3: return 3;
case R4: case S4: case D4: case Q4: return 4;
case R5: case S5: case D5: case Q5: return 5;
case R6: case S6: case D6: case Q6: return 6;
case R7: case S7: case D7: case Q7: return 7;
case R8: case S8: case D8: case Q8: return 8;
case R9: case S9: case D9: case Q9: return 9;
case R10: case S10: case D10: case Q10: return 10;
case R11: case S11: case D11: case Q11: return 11;
case R12: case S12: case D12: case Q12: return 12;
case SP: case S13: case D13: case Q13: return 13;
case LR: case S14: case D14: case Q14: return 14;
case PC: case S15: case D15: case Q15: return 15;
case S16: case D16: return 16;
case S17: case D17: return 17;
case S18: case D18: return 18;
case S19: case D19: return 19;
case S20: case D20: return 20;
case S21: case D21: return 21;
case S22: case D22: return 22;
case S23: case D23: return 23;
case S24: case D24: return 24;
case S25: case D25: return 25;
case S26: case D26: return 26;
case S27: case D27: return 27;
case S28: case D28: return 28;
case S29: case D29: return 29;
case S30: case D30: return 30;
case S31: case D31: return 31;
}
}
namespace ARMII {
/// Target Operand Flag enum.
enum TOF {
//===------------------------------------------------------------------===//
// ARM Specific MachineOperand flags.
MO_NO_FLAG,
/// MO_LO16 - On a symbol operand, this represents a relocation containing
/// lower 16 bit of the address. Used only via movw instruction.
MO_LO16,
/// MO_HI16 - On a symbol operand, this represents a relocation containing
/// higher 16 bit of the address. Used only via movt instruction.
MO_HI16,
/// MO_LO16_NONLAZY - On a symbol operand "FOO", this represents a
/// relocation containing lower 16 bit of the non-lazy-ptr indirect symbol,
/// i.e. "FOO$non_lazy_ptr".
/// Used only via movw instruction.
MO_LO16_NONLAZY,
/// MO_HI16_NONLAZY - On a symbol operand "FOO", this represents a
/// relocation containing lower 16 bit of the non-lazy-ptr indirect symbol,
/// i.e. "FOO$non_lazy_ptr". Used only via movt instruction.
MO_HI16_NONLAZY,
/// MO_LO16_NONLAZY_PIC - On a symbol operand "FOO", this represents a
/// relocation containing lower 16 bit of the PC relative address of the
/// non-lazy-ptr indirect symbol, i.e. "FOO$non_lazy_ptr - LABEL".
/// Used only via movw instruction.
MO_LO16_NONLAZY_PIC,
/// MO_HI16_NONLAZY_PIC - On a symbol operand "FOO", this represents a
/// relocation containing lower 16 bit of the PC relative address of the
/// non-lazy-ptr indirect symbol, i.e. "FOO$non_lazy_ptr - LABEL".
/// Used only via movt instruction.
MO_HI16_NONLAZY_PIC,
/// MO_PLT - On a symbol operand, this represents an ELF PLT reference on a
/// call operand.
MO_PLT
};
} // end namespace ARMII
} // end namespace llvm;
#endif
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