Method: Voodoo::AMD64NasmGenerator#initialize

Defined in:
lib/voodoo/generators/amd64_nasm_generator.rb

#initialize(params = {}) ⇒ AMD64NasmGenerator

Returns a new instance of AMD64NasmGenerator.



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# File 'lib/voodoo/generators/amd64_nasm_generator.rb', line 64

def initialize params = {}
  # Number of bytes in a word
  @WORDSIZE_BITS = 3
  @WORDSIZE = 1 << @WORDSIZE_BITS
  # Word name in NASM lingo
  @WORD_NAME = 'qword'
  # Default alignment for code
  @CODE_ALIGNMENT = 0
  # Default alignment for data
  @DATA_ALIGNMENT = @WORDSIZE
  # Default alignment for functions
  @FUNCTION_ALIGNMENT = 16
  # Register used for return values
  @RETURN_REG = :rax
  # Stack alignment restrictions
  @STACK_ALIGNMENT_BITS = @WORDSIZE_BITS
  @STACK_ALIGNMENT = 1 << @STACK_ALIGNMENT_BITS
  @TEMPORARIES = [:r11]
  # Registers used for argument passing
  @ARG_REGS = [:rdi, :rsi, :rdx, :rcx, :r8, :r9]
  @NREG_ARGS = @ARG_REGS.length
  # Registers used to store locals
  @LOCAL_REGISTERS = [:r12, :r13, :r14, :r15]
  @NLOCAL_REGISTERS = @LOCAL_REGISTERS.length
  @LOCAL_REGISTERS_SET = Set.new @LOCAL_REGISTERS
  # Accumulator index
  @AX = :rax
  # Base index
  @BX = :rbx
  # Count index
  @CX = :rcx
  # Data index
  @DX = :rdx
  # Base pointer
  @BP = :rbp
  # Stack pointer
  @SP = :rsp
  @SAVE_FRAME_REGISTERS = [:rbx, :r12, :r13, :r14, :r15, :rsp, :rbp]
  @SAVED_FRAME_LAYOUT = {}
  @SAVE_FRAME_REGISTERS.each_with_index { |r,i| @SAVED_FRAME_LAYOUT[r] = i }
  super params
  @features.merge! \
    :'bits-per-word' => '64',
    :'byte-order' => 'little-endian',
    :'bytes-per-word' => '8'
  @saved_registers = []
  @function_end_label = nil
end