Subversion Repositories ssbcc

# Copyright 2014, Sinclair R.F., Inc.

def fetchram(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 = variable\n

  ( u_addr - u_mem )

  """

  # 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;