v8/src/x64/assembler-x64.h

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#ifndef V8_X64_ASSEMBLER_X64_H_
#define V8_X64_ASSEMBLER_X64_H_

// TODO(x64): This is a temporary stub, we will need to implement this code.

namespace v8 { namespace internal {

struct Register {
  bool is_valid() const  { return 0 <= code_ && code_ < 8; }
  bool is(Register reg) const  { return code_ == reg.code_; }
  // eax, ebx, ecx and edx are byte registers, the rest are not.
  bool is_byte_register() const  { return code_ <= 3; }
  int code() const  {
    ASSERT(is_valid());
    return code_;
  }
  int bit() const  {
    ASSERT(is_valid());
    return 1 << code_;
  }

  // (unfortunately we can't make this private in a struct)
  int code_;
};

const int kNumRegisters = 8;
extern Register no_reg;

enum Condition {
  // any value < 0 is considered no_condition
  no_condition  = -1,

  overflow      =  0,
  no_overflow   =  1,
  below         =  2,
  above_equal   =  3,
  equal         =  4,
  not_equal     =  5,
  below_equal   =  6,
  above         =  7,
  negative      =  8,
  positive      =  9,
  parity_even   = 10,
  parity_odd    = 11,
  less          = 12,
  greater_equal = 13,
  less_equal    = 14,
  greater       = 15,

  // aliases
  carry         = below,
  not_carry     = above_equal,
  zero          = equal,
  not_zero      = not_equal,
  sign          = negative,
  not_sign      = positive
};

enum Hint {
  no_hint = 0,
  not_taken = 0x2e,
  taken = 0x3e
};

} }  // namespace v8::internal

#endif  // V8_X64_ASSEMBLER_X64_H_