src/aarch32/constants-aarch32.h

// Copyright 2015, VIXL authors
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#ifndef VIXL_CONSTANTS_AARCH32_H_
#define VIXL_CONSTANTS_AARCH32_H_

extern "C" {
#include <stdint.h>
}

namespace vixl {
namespace aarch32 {

const unsigned kRegSizeInBits = 32;
const unsigned kRegSizeInBytes = kRegSizeInBits / 8;
const unsigned kSRegSizeInBits = 32;
const unsigned kSRegSizeInBytes = kSRegSizeInBits / 8;
const unsigned kDRegSizeInBits = 64;
const unsigned kDRegSizeInBytes = kDRegSizeInBits / 8;
const unsigned kQRegSizeInBits = 128;
const unsigned kQRegSizeInBytes = kQRegSizeInBits / 8;

const unsigned kNumberOfRegisters = 16;
const unsigned kNumberOfSRegisters = 32;
const unsigned kMaxNumberOfDRegisters = 32;
const unsigned kNumberOfQRegisters = 16;
const unsigned kNumberOfT32LowRegisters = 8;

const unsigned kIpCode = 12;
const unsigned kSpCode = 13;
const unsigned kLrCode = 14;
const unsigned kPcCode = 15;

const unsigned kT32PcDelta = 4;
const unsigned kA32PcDelta = 8;

const unsigned kRRXEncodedValue = 3;

const unsigned kCoprocMask = 0xe;
const unsigned kInvalidCoprocMask = 0xa;

const unsigned kLowestT32_32Opcode = 0xe8000000;

const uint32_t kUnknownValue = 0xdeadbeef;

const uint32_t kMaxInstructionSizeInBytes = 4;
const uint32_t kA32InstructionSizeInBytes = 4;
const uint32_t k32BitT32InstructionSizeInBytes = 4;
const uint32_t k16BitT32InstructionSizeInBytes = 2;

// Maximum size emitted by a single T32 unconditional macro-instruction.
const uint32_t kMaxT32MacroInstructionSizeInBytes = 32;

const uint32_t kCallerSavedRegistersMask = 0x500f;

enum SystemFunctionsOpcodes { kPrintfCode };

}  // namespace aarch32
}  // namespace vixl

#endif  // VIXL_CONSTANTS_AARCH32_H_