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[/] [ssbcc/] [trunk/] [core/] [9x8/] [macros/] [outport.py] - Blame information for rev 5

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1 3 sinclairrf
# Copyright 2014, Sinclair R.F., Inc.
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def outport(ad):
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  """
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  Built-in macro to write the top of the data stack to the specified output
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  port.\n
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  Usage:
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    .outport(O_name[,op])
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  where
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    O_name      is the name of the output port
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    op          is an optional argument to override the default "drop"
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                instruction\n
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  The effect is:  Write T to the specified output port.\n
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  ( u - )
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  """
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  # Add the macro to the list of recognized macros.
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  ad.AddMacro('.outport', 3, [
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                               ['','symbol'],
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                               ['drop','instruction','singlemacro','singlevalue','symbol']
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                             ]);
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  # Define the macro functionality.
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  def emitFunction(ad,fp,argument):
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    outportName = argument[0]['value'];
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    if not ad.IsOutport(outportName):
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      raise asmDef.AsmException('Symbol "%s" is either not an output port or is a strobe-only outport at %s' % (outportName,argument[0]['loc']));
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    ad.EmitPush(fp,ad.OutportAddress(outportName) & 0xFF,outportName);
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    ad.EmitOpcode(fp,ad.InstructionOpcode('outport'),'outport');
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    ad.EmitOptArg(fp,argument[1]);
31 5 sinclairrf
 
32 3 sinclairrf
  ad.EmitFunction['.outport'] = emitFunction;

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