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/*
* Copyright (c) 2004 Deva Seetharam deva@alum.mit.edu
* All rights reserved.
* Copyright (c) 1996 Tommaso Cucinotta, Alessandro Evangelista, Luigi Rizzo
* All rights reserved.
*
* Dip. di Ingegneria dell'Informazione, Universita of Pisa,
* via Diotisalvi 2 -- 56126 Pisa.
* email: simulpic@iet.unipi.it
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by
* Tommaso Cucinotta, Alessandro Evangelista and Luigi Rizzo
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
*
* Project: SimulPIC
* FileName: tprogmem.cc
*
*/
#include "tprogmem.h"
unsigned int TProgram_Memory::Index(TProgram_Address Address)
{
return(Address & (PROGMEM_SIZE -1) ); // Address & 0000.0011.1111.1111
};
TOp_Code TProgram_Memory::Read(TProgram_Address addr)
{
return Memory[Index(addr)];
}
void TProgram_Memory::Write(TProgram_Address addr, TOp_Code opc)
{
Memory[Index(addr)]=opc;
}
TDestination TProgram_Memory::Get_Destination(TProgram_Address addr)
{
return ((Read(addr) & 0x0080)==0x0080) ? (_f) : (_W);
}
TData_Address TProgram_Memory::Get_Data_Address(TProgram_Address addr)
{
return Read(addr) & 0x007F;
}
TBit_Address TProgram_Memory::Get_Bit_Address(TProgram_Address addr)
{
return (Read(addr) >> 7) & 0x0003;
}
TRegister TProgram_Memory::Get_Literal(TProgram_Address addr)
{
return Read(addr) & 0x00FF;
}
TProgram_Address TProgram_Memory::Get_Literal_Address(TProgram_Address addr)
{
return Read(addr) & 0x07FF;
}
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