Class: GBRb::InstructionSet::Instruction

Inherits:

Object

• Object
• GBRb::InstructionSet::Instruction

Defined in:

lib/gbrb/instruction_set/instruction.rb

Direct Known Subclasses

AddHl, AddSpR8, Arithmetic, Bit, Boolean, Call, Ccf, Cpl, Daa, Dec, DisableInterrupts, EnableInterrupts, Halt, Inc, Jump, Ld, LdD16, LdD8, Lda16a, Lda16sp, Ldaa16, Ldac, Ldahld, Ldahli, Ldann, Ldca, Ldh, LdhlD8, Ldhlda, Ldhlia, Ldhln, Ldhlsp, Ldnhl, Ldnna, Ldsphl, Pop, Push, Res, Ret, Rl, Rr, Rst, Scf, Set, Sla, Sra, Srl, Stop, Swap

Instance Attribute Summary

• #i ⇒ Object

  Returns the value of attribute i.

• #m ⇒ Object

  Returns the value of attribute m.

• #t ⇒ Object

  Returns the value of attribute t.

Instance Method Summary

• #call(r, mem) ⇒ Object
• #carry?(left, right, mask) ⇒ Boolean
• #immediate_count ⇒ Object
• #initialize(m = 1, t = 4, immediates = 0, *extra) ⇒ Instruction constructor

  A new instance of Instruction.

Constructor Details

#initialize(m = 1, t = 4, immediates = 0, *extra) ⇒ Instruction

Returns a new instance of Instruction.

# File 'lib/gbrb/instruction_set/instruction.rb', line 5

def initialize m=1, t=4, immediates=0, *extra
  @m = m
  @t = t
  @immediates = immediates
end

Instance Attribute Details

#i ⇒ Object

Returns the value of attribute i.

# File 'lib/gbrb/instruction_set/instruction.rb', line 3

def i
  @i
end

#m ⇒ Object

Returns the value of attribute m.

# File 'lib/gbrb/instruction_set/instruction.rb', line 3

def m
  @m
end

#t ⇒ Object

Returns the value of attribute t.

# File 'lib/gbrb/instruction_set/instruction.rb', line 3

def t
  @t
end

Instance Method Details

#call(r, mem) ⇒ Object

# File 'lib/gbrb/instruction_set/instruction.rb', line 15

def call r, mem
  nil
end

#carry?(left, right, mask) ⇒ Boolean

Returns:

• (Boolean)

# File 'lib/gbrb/instruction_set/instruction.rb', line 19

def carry? left, right, mask
  (mask-1 & left).public_send(@op, mask-1 & right) & mask == mask
end

#immediate_count ⇒ Object

# File 'lib/gbrb/instruction_set/instruction.rb', line 11

def immediate_count
  @immediates
end