Subversion Repositories ssbcc

# Copyright 2014, Sinclair R.F., Inc.
 
def fetchramminus(ad):
  """
  Built-in macro for the fetch- instruction where the memory is specified by
  the variable name instead of the memory name.\n
  Usage:
    .fetchram-(variable)
  where
    variable    is a variable\n
  The effect is:  T = T-1
                  N = variable\n
  ( u_addr - u_mem u_addr-1 )
  """
 
  # Add the macro to the list of recognized macros.
  ad.AddMacro('.fetchram-', 1, [ ['','symbol'] ]);
 
  # Define the macro functionality.
  def emitFunction(ad,fp,argument):
    (addr,ixBank,bankName) = ad.Emit_GetAddrAndBank(argument[0]);
    emitString = 'fetch-(%s) -- %s' % (bankName,argument[0]['value'],);
    ad.EmitOpcode(fp,ad.specialInstructions['fetch-'] | ixBank,emitString);
 
  ad.EmitFunction['.fetchram-'] = emitFunction;