dart::compiler::Operand Class Reference

#include <assembler_arm.h>

Inheritance diagram for dart::compiler::Operand:

Public Types
enum	OperandType {   Shifted , Extended , Immediate , BitfieldImm ,   Unknown }

Public Member Functions
	Operand ()
	Operand (const Operand &other)
Operand &	operator= (const Operand &other)
	Operand (uint32_t immediate)
	Operand (uint32_t rotate, uint32_t immed8)
	Operand (Register rm)
	Operand (Register rm, Shift shift, uint32_t shift_imm)
	Operand (Register rm, Shift shift, Register rs)
	Operand ()
	Operand (const Operand &other)
Operand &	operator= (const Operand &other)
	Operand (Register rm)
	Operand (Register rm, Shift shift, int32_t imm)
	Operand (Register rm, Shift shift, Register r)
	Operand (Register rm, Extend extend, int32_t imm)
	Operand (Register rm, Extend extend, Register r)
	Operand (int32_t imm)
	Operand (uint8_t n, int8_t imm_s, int8_t imm_r)
uint8_t	mod () const
Register	rm () const
ScaleFactor	scale () const
Register	index () const
Register	base () const
int8_t	disp8 () const
int32_t	disp32 () const
	Operand (const Operand &other)
Operand &	operator= (const Operand &other)
bool	Equals (const Operand &other) const
uint8_t	rex () const
uint8_t	mod () const
Register	rm () const
ScaleFactor	scale () const
Register	index () const
Register	base () const
int8_t	disp8 () const
int32_t	disp32 () const
	Operand (const Operand &other)
Operand &	operator= (const Operand &other)
bool	Equals (const Operand &other) const
Public Member Functions inherited from dart::ValueObject
	ValueObject ()
	~ValueObject ()

Static Public Member Functions
static bool	CanHold (uint32_t immediate, Operand *o)
static bool	IsImmLogical (uint64_t value, uint8_t width, Operand *imm_op)
static OperandType	CanHold (int64_t imm, uint8_t sz, Operand *op)

Protected Member Functions
	Operand ()
void	SetModRM (int mod, Register rm)
void	SetSIB (ScaleFactor scale, Register index, Register base)
void	SetDisp8 (int8_t disp)
void	SetDisp32 (int32_t disp)
	Operand ()
void	SetModRM (int mod, Register rm)
void	SetSIB (ScaleFactor scale, Register index, Register base)
void	SetDisp8 (int8_t disp)
void	SetDisp32 (int32_t disp)

Friends
class	Assembler
class	Address

Detailed Description

Definition at line 129 of file assembler_arm.h.

Member Enumeration Documentation

OperandType

enum dart::compiler::Operand::OperandType

Enumerator
Shifted
Extended
Immediate
BitfieldImm
Unknown

Definition at line 349 of file assembler_arm64.h.

                   {
    Shifted,
    Extended,
    Immediate,
    BitfieldImm,
    Unknown,
  };

Constructor & Destructor Documentation

Operand() [1/20]

dart::compiler::Operand::Operand ( )

inline

Definition at line 132 of file assembler_arm.h.

: type_(-1), encoding_(-1) {}

Operand() [2/20]

dart::compiler::Operand::Operand ( const Operand &  other )

inline

Definition at line 135 of file assembler_arm.h.

      : ValueObject(), type_(other.type_), encoding_(other.encoding_) {}

Operand() [3/20]

dart::compiler::Operand::Operand ( uint32_t  immediate )

inlineexplicit

Definition at line 146 of file assembler_arm.h.

                                       {
    ASSERT(immediate < (1 << kImmed8Bits));
    type_ = 1;
    encoding_ = immediate;
  }

Operand() [4/20]

dart::compiler::Operand::Operand ( uint32_t  rotate, uint32_t  immed8  )

inline

Definition at line 153 of file assembler_arm.h.

                                            {
    ASSERT((rotate < (1 << kRotateBits)) && (immed8 < (1 << kImmed8Bits)));
    type_ = 1;
    encoding_ = (rotate << kRotateShift) | (immed8 << kImmed8Shift);
  }

Operand() [5/20]

dart::compiler::Operand::Operand ( Register  rm )

inlineexplicit

Definition at line 160 of file assembler_arm.h.

                                {
    type_ = 0;
    encoding_ = static_cast<uint32_t>(rm);
  }

Operand() [6/20]

dart::compiler::Operand::Operand ( Register  rm, Shift  shift, uint32_t  shift_imm  )

inline

Definition at line 166 of file assembler_arm.h.

                                                        {
    ASSERT(shift_imm < (1 << kShiftImmBits));
    type_ = 0;
    encoding_ = shift_imm << kShiftImmShift |
                static_cast<uint32_t>(shift) << kShiftShift |
                static_cast<uint32_t>(rm);
  }

Operand() [7/20]

dart::compiler::Operand::Operand ( Register  rm, Shift  shift, Register  rs  )

inline

Definition at line 175 of file assembler_arm.h.

                                                 {
    type_ = 0;
    encoding_ = static_cast<uint32_t>(rs) << kShiftRegisterShift |
                static_cast<uint32_t>(shift) << kShiftShift | (1 << 4) |
                static_cast<uint32_t>(rm);
  }

Operand() [8/20]

dart::compiler::Operand::Operand ( )

inline

Definition at line 358 of file assembler_arm64.h.

: encoding_(-1), type_(Unknown) {}

Operand() [9/20]

dart::compiler::Operand::Operand ( const Operand &  other )

inline

Definition at line 361 of file assembler_arm64.h.

      : ValueObject(), encoding_(other.encoding_), type_(other.type_) {}

Operand() [10/20]

dart::compiler::Operand::Operand ( Register  rm )

inlineexplicit

Definition at line 370 of file assembler_arm64.h.

                                {
    ASSERT((rm != R31) && (rm != CSP));
    encoding_ = Arm64Encode::Rm(rm);
    type_ = Shifted;
  }

Operand() [11/20]

dart::compiler::Operand::Operand ( Register  rm, Shift  shift, int32_t  imm  )

inline

Definition at line 376 of file assembler_arm64.h.

                                                 {
    ASSERT(Utils::IsUint(6, imm));
    ASSERT((rm != R31) && (rm != CSP));
    encoding_ = (imm << kImm6Shift) | Arm64Encode::Rm(rm) |
                (static_cast<int32_t>(shift) << kShiftTypeShift);
    type_ = Shifted;
  }

Operand() [12/20]

dart::compiler::Operand::Operand	(	Register	rm,
		Shift	shift,
		Register	r
	)

Operand() [13/20]

dart::compiler::Operand::Operand ( Register  rm, Extend  extend, int32_t  imm  )

inline

Definition at line 387 of file assembler_arm64.h.

                                                   {
    ASSERT(Utils::IsUint(3, imm));
    ASSERT((rm != R31) && (rm != CSP));
    encoding_ = B21 | Arm64Encode::Rm(rm) |
                (static_cast<int32_t>(extend) << kExtendTypeShift) |
                ((imm & 0x7) << kImm3Shift);
    type_ = Extended;
  }

Operand() [14/20]

dart::compiler::Operand::Operand	(	Register	rm,
		Extend	extend,
		Register	r
	)

Operand() [15/20]

dart::compiler::Operand::Operand ( int32_t  imm )

inlineexplicit

Definition at line 399 of file assembler_arm64.h.

                                {
    if (Utils::IsUint(12, imm)) {
      encoding_ = imm << kImm12Shift;
    } else {
      // imm only has bits in [12, 24) set.
      ASSERT(((imm & 0xfff) == 0) && (Utils::IsUint(12, imm >> 12)));
      encoding_ = B22 | ((imm >> 12) << kImm12Shift);
    }
    type_ = Immediate;
  }

Operand() [16/20]

dart::compiler::Operand::Operand ( uint8_t  n, int8_t  imm_s, int8_t  imm_r  )

inline

Definition at line 415 of file assembler_arm64.h.

                                                 {
    ASSERT((n == 1) || (n == 0));
    ASSERT(Utils::IsUint(6, imm_s) && Utils::IsUint(6, imm_r));
    type_ = BitfieldImm;
    encoding_ = (static_cast<int32_t>(n) << kNShift) |
                (static_cast<int32_t>(imm_s) << kImmSShift) |
                (static_cast<int32_t>(imm_r) << kImmRShift);
  }

Operand() [17/20]

dart::compiler::Operand::Operand ( const Operand &  other )

inline

Definition at line 75 of file assembler_ia32.h.

                                : ValueObject(), length_(other.length_) {
    memmove(&encoding_[0], &other.encoding_[0], other.length_);
  }

Operand() [18/20]

dart::compiler::Operand::Operand ( )

inlineprotected

Definition at line 94 of file assembler_ia32.h.

: length_(0) {}  // Needed by subclass Address.

Operand() [19/20]

dart::compiler::Operand::Operand ( const Operand &  other )

inline

Definition at line 92 of file assembler_x64.h.

      : ValueObject(), length_(other.length_), rex_(other.rex_) {
    memmove(&encoding_[0], &other.encoding_[0], other.length_);
  }

Operand() [20/20]

dart::compiler::Operand::Operand ( )

inlineprotected

Definition at line 114 of file assembler_x64.h.

: length_(0), rex_(REX_NONE) {}  // Needed by subclass Address.

Member Function Documentation

base() [1/2]

Register dart::compiler::Operand::base ( ) const

inline

Definition at line 63 of file assembler_ia32.h.

{ return static_cast<Register>(encoding_at(1) & 7); }

base() [2/2]

Register dart::compiler::Operand::base ( ) const

inline

Definition at line 77 of file assembler_x64.h.

                        {
    int base_rex = (rex_ & REX_B) << 3;
    return static_cast<Register>(base_rex + (encoding_at(1) & 7));
  }

CanHold() [1/2]

static OperandType dart::compiler::Operand::CanHold ( int64_t  imm, uint8_t  sz, Operand *  op  )

inlinestatic

Definition at line 438 of file assembler_arm64.h.

                                                                   {
    ASSERT(op != nullptr);
    ASSERT((sz == kXRegSizeInBits) || (sz == kWRegSizeInBits));
    if (Utils::IsUint(12, imm)) {
      op->encoding_ = imm << kImm12Shift;
      op->type_ = Immediate;
    } else if (((imm & 0xfff) == 0) && (Utils::IsUint(12, imm >> 12))) {
      op->encoding_ = B22 | ((imm >> 12) << kImm12Shift);
      op->type_ = Immediate;
    } else if (IsImmLogical(imm, sz, op)) {
      op->type_ = BitfieldImm;
    } else {
      op->encoding_ = 0;
      op->type_ = Unknown;
    }
    return op->type_;
  }

CanHold() [2/2]

static bool dart::compiler::Operand::CanHold ( uint32_t  immediate, Operand *  o  )

inlinestatic

Definition at line 182 of file assembler_arm.h.

                                                      {
    // Avoid the more expensive test for frequent small immediate values.
    if (immediate < (1 << kImmed8Bits)) {
      o->type_ = 1;
      o->encoding_ = (0 << kRotateShift) | (immediate << kImmed8Shift);
      return true;
    }
    // Note that immediate must be unsigned for the test to work correctly.
    for (int rot = 0; rot < 16; rot++) {
      uint32_t imm8 = Utils::RotateLeft(immediate, 2 * rot);
      if (imm8 < (1 << kImmed8Bits)) {
        o->type_ = 1;
        o->encoding_ = (rot << kRotateShift) | (imm8 << kImmed8Shift);
        return true;
      }
    }
    return false;
  }

disp32() [1/2]

int32_t dart::compiler::Operand::disp32 ( ) const

inline

Definition at line 70 of file assembler_ia32.h.

                         {
    ASSERT(length_ >= 5);
    return bit_copy<int32_t>(encoding_[length_ - 4]);
  }

disp32() [2/2]

int32_t dart::compiler::Operand::disp32 ( ) const

inline

Definition at line 87 of file assembler_x64.h.

                         {
    ASSERT(length_ >= 5);
    return bit_copy<int32_t>(encoding_[length_ - 4]);
  }

disp8() [1/2]

int8_t dart::compiler::Operand::disp8 ( ) const

inline

Definition at line 65 of file assembler_ia32.h.

                       {
    ASSERT(length_ >= 2);
    return static_cast<int8_t>(encoding_[length_ - 1]);
  }

disp8() [2/2]

int8_t dart::compiler::Operand::disp8 ( ) const

inline

Definition at line 82 of file assembler_x64.h.

                       {
    ASSERT(length_ >= 2);
    return static_cast<int8_t>(encoding_[length_ - 1]);
  }

Equals() [1/2]

bool dart::compiler::Operand::Equals ( const Operand &  other ) const

inline

Definition at line 85 of file assembler_ia32.h.

                                          {
    if (length_ != other.length_) return false;
    for (uint8_t i = 0; i < length_; i++) {
      if (encoding_[i] != other.encoding_[i]) return false;
    }
    return true;
  }

Equals() [2/2]

bool dart::compiler::Operand::Equals ( const Operand &  other ) const

inline

Definition at line 104 of file assembler_x64.h.

                                          {
    if (length_ != other.length_) return false;
    if (rex_ != other.rex_) return false;
    for (uint8_t i = 0; i < length_; i++) {
      if (encoding_[i] != other.encoding_[i]) return false;
    }
    return true;
  }

index() [1/2]

Register dart::compiler::Operand::index ( ) const

inline

Definition at line 59 of file assembler_ia32.h.

                         {
    return static_cast<Register>((encoding_at(1) >> 3) & 7);
  }

index() [2/2]

Register dart::compiler::Operand::index ( ) const

inline

Definition at line 72 of file assembler_x64.h.

                         {
    int index_rex = (rex_ & REX_X) << 2;
    return static_cast<Register>(index_rex + ((encoding_at(1) >> 3) & 7));
  }

IsImmLogical()

static bool dart::compiler::Operand::IsImmLogical ( uint64_t  value, uint8_t  width, Operand *  imm_op  )

static

mod() [1/2]

uint8_t dart::compiler::Operand::mod ( ) const

inline

Definition at line 51 of file assembler_ia32.h.

{ return (encoding_at(0) >> 6) & 3; }

mod() [2/2]

uint8_t dart::compiler::Operand::mod ( ) const

inline

Definition at line 61 of file assembler_x64.h.

{ return (encoding_at(0) >> 6) & 3; }

operator=() [1/4]

Operand & dart::compiler::Operand::operator= ( const Operand &  other )

inline

Definition at line 139 of file assembler_arm.h.

                                           {
    type_ = other.type_;
    encoding_ = other.encoding_;
    return *this;
  }

operator=() [2/4]

Operand & dart::compiler::Operand::operator= ( const Operand &  other )

inline

Definition at line 364 of file assembler_arm64.h.

                                           {
    type_ = other.type_;
    encoding_ = other.encoding_;
    return *this;
  }

operator=() [3/4]

Operand & dart::compiler::Operand::operator= ( const Operand &  other )

inline

Definition at line 79 of file assembler_ia32.h.

                                           {
    length_ = other.length_;
    memmove(&encoding_[0], &other.encoding_[0], other.length_);
    return *this;
  }

operator=() [4/4]

Operand & dart::compiler::Operand::operator= ( const Operand &  other )

inline

Definition at line 97 of file assembler_x64.h.

                                           {
    length_ = other.length_;
    rex_ = other.rex_;
    memmove(&encoding_[0], &other.encoding_[0], other.length_);
    return *this;
  }

rex()

uint8_t dart::compiler::Operand::rex ( ) const

inline

Definition at line 59 of file assembler_x64.h.

{ return rex_; }

rm() [1/2]

Register dart::compiler::Operand::rm ( ) const

inline

Definition at line 53 of file assembler_ia32.h.

{ return static_cast<Register>(encoding_at(0) & 7); }

rm() [2/2]

Register dart::compiler::Operand::rm ( ) const

inline

Definition at line 63 of file assembler_x64.h.

                      {
    int rm_rex = (rex_ & REX_B) << 3;
    return static_cast<Register>(rm_rex + (encoding_at(0) & 7));
  }

scale() [1/2]

ScaleFactor dart::compiler::Operand::scale ( ) const

inline

Definition at line 55 of file assembler_ia32.h.

                            {
    return static_cast<ScaleFactor>((encoding_at(1) >> 6) & 3);
  }

scale() [2/2]

ScaleFactor dart::compiler::Operand::scale ( ) const

inline

Definition at line 68 of file assembler_x64.h.

                            {
    return static_cast<ScaleFactor>((encoding_at(1) >> 6) & 3);
  }

SetDisp32() [1/2]

void dart::compiler::Operand::SetDisp32 ( int32_t  disp )

inlineprotected

Definition at line 114 of file assembler_ia32.h.

                               {
    ASSERT(length_ == 1 || length_ == 2);
    intptr_t disp_size = sizeof(disp);
    memmove(&encoding_[length_], &disp, disp_size);
    length_ += disp_size;
  }

SetDisp32() [2/2]

void dart::compiler::Operand::SetDisp32 ( int32_t  disp )

inlineprotected

Definition at line 142 of file assembler_x64.h.

                               {
    ASSERT(length_ == 1 || length_ == 2);
    memmove(&encoding_[length_], &disp, sizeof(disp));
    length_ += sizeof(disp);
  }

SetDisp8() [1/2]

void dart::compiler::Operand::SetDisp8 ( int8_t  disp )

inlineprotected

Definition at line 109 of file assembler_ia32.h.

                             {
    ASSERT(length_ == 1 || length_ == 2);
    encoding_[length_++] = static_cast<uint8_t>(disp);
  }

SetDisp8() [2/2]

void dart::compiler::Operand::SetDisp8 ( int8_t  disp )

inlineprotected

Definition at line 137 of file assembler_x64.h.

                             {
    ASSERT(length_ == 1 || length_ == 2);
    encoding_[length_++] = static_cast<uint8_t>(disp);
  }

SetModRM() [1/2]

void dart::compiler::Operand::SetModRM ( int  mod, Register  rm  )

inlineprotected

Definition at line 96 of file assembler_ia32.h.

                                      {
    ASSERT((mod & ~3) == 0);
    encoding_[0] = (mod << 6) | rm;
    length_ = 1;
  }

SetModRM() [2/2]

void dart::compiler::Operand::SetModRM ( int  mod, Register  rm  )

inlineprotected

Definition at line 116 of file assembler_x64.h.

                                      {
    ASSERT((mod & ~3) == 0);
    if ((rm > 7) && !((rm == R12) && (mod != 3))) {
      rex_ |= REX_B;
    }
    encoding_[0] = (mod << 6) | (rm & 7);
    length_ = 1;
  }

SetSIB() [1/2]

void dart::compiler::Operand::SetSIB ( ScaleFactor  scale, Register  index, Register  base  )

inlineprotected

Definition at line 102 of file assembler_ia32.h.

                                                                {
    ASSERT(length_ == 1);
    ASSERT((scale & ~3) == 0);
    encoding_[1] = (scale << 6) | (index << 3) | base;
    length_ = 2;
  }

SetSIB() [2/2]

void dart::compiler::Operand::SetSIB ( ScaleFactor  scale, Register  index, Register  base  )

inlineprotected

Definition at line 125 of file assembler_x64.h.

                                                                {
    ASSERT(length_ == 1);
    ASSERT((scale & ~3) == 0);
    if (base > 7) {
      ASSERT((rex_ & REX_B) == 0);  // Must not have REX.B already set.
      rex_ |= REX_B;
    }
    if (index > 7) rex_ |= REX_X;
    encoding_[1] = (scale << 6) | ((index & 7) << 3) | (base & 7);
    length_ = 2;
  }

Friends And Related Symbol Documentation

Address

friend class Address

friend

Definition at line 218 of file assembler_arm.h.

Assembler

Assembler

friend

Definition at line 217 of file assembler_arm.h.

---

The documentation for this class was generated from the following files:

• third_party/dart-lang/sdk/runtime/vm/compiler/assembler/assembler_arm.h
• third_party/dart-lang/sdk/runtime/vm/compiler/assembler/assembler_arm64.h
• third_party/dart-lang/sdk/runtime/vm/compiler/assembler/assembler_ia32.h
• third_party/dart-lang/sdk/runtime/vm/compiler/assembler/assembler_x64.h