area.c.svn-base

模拟多核状态下龙芯处理器的功能

	      if (i == iter_height)
		{
		  total_height =
		    2 * inter_height + data / blocks * multiplier +
		    fixed_tracks_external;
		  total_width =
		    2 * inter_width + data / (2 * blocks) * multiplier +
		    fixed_tracks_internal;}
	      else
		{
		  total_height =
		    2 * inter_height + data / blocks * multiplier +
		    fixed_tracks_internal;
		  total_width =
		    2 * inter_width + data / (2 * blocks) * multiplier +
		    fixed_tracks_internal;
		  inter_height = total_height;
		  inter_width = total_width;
		  multiplier = multiplier * 4;
		}
	    }
	}
      else
	{
	  htree_half = htree - 1;
	  iter_height = htree_half / 2;
	  for (i = 0; i <= iter_height; i++)
	    {
	      total_height =
		2 * inter_height + data / blocks * multiplier +
		fixed_tracks_internal;
	      total_width =
		2 * inter_width + data / (2 * blocks) * multiplier +
		fixed_tracks_internal;
	      inter_height = total_height;
	      inter_width = total_width;
	      multiplier = multiplier * 4;
	    }
	  total_width =
	    2 * inter_width + data / (2 * blocks) * multiplier +
	    fixed_tracks_external;
	}
    }

  dataarray_area.width = total_width;
  dataarray_area.height = total_height;

  temp.height = dataarray_area.width;
  temp.width = dataarray_area.height;

  temp_aspect =
    ((temp.height / temp.width) >
     1.0) ? (temp.height / temp.width) : 1.0 / (temp.height / temp.width);
  aspect_ratio_data =
    ((dataarray_area.height / dataarray_area.width) >
     1.0) ? (dataarray_area.height / dataarray_area.width) : 1.0 /
    (dataarray_area.height / dataarray_area.width);
  if (aspect_ratio_data > temp_aspect)
    {
      dataarray_area.height = temp.height;
      dataarray_area.width = temp.width;
    }

  aspect_ratio_data =
    ((dataarray_area.height / dataarray_area.width) >
     1.0) ? (dataarray_area.height / dataarray_area.width) : 1.0 /
    (dataarray_area.height / dataarray_area.width);

  return (dataarray_area);
}

area_type
tagsubarray (int baddr,int C,int B,int A,int Ndbl,int Ndwl,double Nspd,double NSubbanks,int RWP,int ERP,int EWP,int NSER,
	     double techscaling_factor)
{
  int conservative_NSER;
  area_type tagsubarray_area, tag_area, postdecode_area, colmux_area,
    precharge_area, senseamp_area, comp_area;

  conservative_NSER = 0;
  tag_area =
    subarraytag_area (baddr, C, B, A, Ndbl, Ndwl, Nspd, NSubbanks, RWP, ERP,
		      EWP, conservative_NSER, techscaling_factor);
  postdecode_area =
    decodetag_row (baddr, C, B, A, Ndbl, Nspd, Ndwl, NSubbanks, RWP, ERP,
		   EWP);
  colmux_area = colmux (Ndbl, Nspd, RWP, ERP, EWP, conservative_NSER);
  precharge_area = precharge (Ndbl, Nspd, RWP, ERP, EWP, conservative_NSER);
  senseamp_area = senseamp (Ndbl, Nspd, RWP, ERP, EWP, conservative_NSER);
  comp_area = comparatorbit (RWP, ERP, EWP);
  tagsubarray_area.height =
    tag_area.height + colmux_area.height + precharge_area.height +
    senseamp_area.height + comp_area.height;
  tagsubarray_area.width = tag_area.width + postdecode_area.width;

  return (tagsubarray_area);
}

area_type
tagsubblock (int baddr,int C,int B,int A,int Ndbl,int Ndwl,double Nspd,double NSubbanks,int SB,int RWP,int ERP,int EWP,
	     int NSER,double techscaling_factor)
{
  int N3to8, T;
  int SB_;
  //int colmuxtracks_rem, writeseltracks_rem;
  int colmuxtracks_rem;
  double tracks_h, tracks_w;
  area_type tagsubarray_area, tagsubblock_area;
  int conservative_NSER;

  conservative_NSER = 0;
  SB_ = SB;
  if (SB_ == 0)
    {
      SB_ = 1;
    }
  //v4.1: using integer casting below 
  //N3to8 =
    //ceil ((1.0 / 3.0) * logtwo_area ((double) (C / (B * A * Ndbl * Nspd))));
  N3to8 =
    (int) (ceil ((1.0 / 3.0) * logtwo_area ((double) (C / (B * A * Ndbl * Nspd)))));
  if (N3to8 == 0)
    {
      N3to8 = 1;
    }

  //v4.1: Fixing double->int type conversion problems. EPSILON is added below to make sure
  //the final int value is the correct one 
  //T =
    //baddr - logtwo_area ((double) (C)) + logtwo_area ((double) (A)) + 2 -
    //logtwo_area ((double) (NSubbanks));
  T =
    (int) (baddr - logtwo_area ((double) (C)) + logtwo_area ((double) (A)) + 2 -
    logtwo_area ((double) (NSubbanks)) + EPSILON);

  colmuxtracks_rem =
    (Ndbl * Nspd >
     tracks_precharge_p) ? (Ndbl * Nspd - tracks_precharge_p) : 0;
  /*writeseltracks_rem = ((2*B*A)/(b0) > tracks_precharge_nx2) ? ((2*B*A)/(b0)-tracks_precharge_nx2) : 0; */

  tracks_h =
    Widthtrack * (N3to8 * 8 * (RWP + ERP + EWP) +
		  (RWP + EWP) * colmuxtracks_rem + Ndbl * Nspd * ERP + (RWP +
									ERP +
									EWP) *
		  T / SB_ + (ERP + RWP) * A);
  tracks_w = Widthtrack * (N3to8 * 8) * (RWP + ERP + EWP);
  tagsubarray_area =
    tagsubarray (baddr, C, B, A, Ndbl, Ndwl, Nspd, NSubbanks, RWP, ERP, EWP,
		 conservative_NSER, techscaling_factor);
  tagsubblock_area.height = 2 * tagsubarray_area.height + tracks_h;
  tagsubblock_area.width = 2 * tagsubarray_area.width + tracks_w;

  return (tagsubblock_area);
}

area_type
tagarray (int baddr,int C,int B,int A,int Ndbl,int Ndwl,double Nspd,double NSubbanks,int RWP,int ERP,int EWP,int NSER,
	  double techscaling_factor)
{
  //int SB, CSB, N3to8, T;
  int SB, N3to8, T;
  area_type tagarray_area, tagsubarray_area, tagsubblock_area;
  area_type temp;
  double temp_aspect;
  int conservative_NSER;

  double fixed_tracks_internal, fixed_tracks_external, variable_tracks;
  double tag, assoc, colmux, predecode, addresslines;
  int blocks, htree, htree_half, i, multiplier, iter_height;
  double inter_height, inter_width, total_height, total_width;

  conservative_NSER = 0;
  SB = Ndwl * Ndbl / 4;
  
  //v4.1: using integer casting below 
  //N3to8 =
    //ceil ((1.0 / 3.0) * logtwo_area ((double) (C / (B * A * Ndbl * Nspd))));
  N3to8 =
    (int) (ceil ((1.0 / 3.0) * logtwo_area ((double) (C / (B * A * Ndbl * Nspd)))));
  if (N3to8 == 0)
    {
      N3to8 = 1;
    }

  //Added by Shyam to make area model sensitive to "change tag" feature
   //v4.1: Fixing double->int type conversion problems. EPSILON is added below to make sure
  //the final int value is the correct one 
  if(!force_tag) {
		//T = ADDRESS_BITS + EXTRA_TAG_BITS-(int)logtwo((double)C)+(int)logtwo((double)A)-(int)(logtwo(NSubbanks));
		T = (int) (ADDRESS_BITS + EXTRA_TAG_BITS-(int)logtwo((double)C)+(int)logtwo((double)A)-(int)(logtwo(NSubbanks)) + EPSILON);
	}
  else {
	    T = force_tag_size;
	}
 
  //Commented by Shyam   T =
    //baddr - logtwo_area ((double) (C)) + logtwo_area ((double) (A)) + 2 -
    //logtwo_area ((double) (NSubbanks));

  tag = T * (RWP + ERP + EWP) * Widthtrack;
  assoc = (RWP + ERP) * A * Widthtrack;
  colmux = Ndbl * Nspd * (RWP + EWP + ERP) * Widthtrack;
  predecode = (RWP + ERP + EWP) * N3to8 * 8 * Widthtrack;
  addresslines = ADDRESS_BITS * (RWP + ERP + EWP) * Widthtrack;

  tagsubarray_area =
    tagsubarray (baddr, C, B, A, Ndbl, Ndwl, Nspd, NSubbanks, RWP, ERP, EWP,
		 conservative_NSER, techscaling_factor);
  tagsubblock_area =
    tagsubblock (baddr, C, B, A, Ndbl, Ndwl, Nspd, NSubbanks, SB, RWP, ERP,
		 EWP, conservative_NSER, techscaling_factor);
  //area_all_tagsubarrays =
    //Ndbl * Ndwl * calculate_area (tagsubarray_area,
				  //techscaling_factor) * CONVERT_TO_MMSQUARE;
  area_all_tagsubarrays = Ndbl * Ndwl * tagsubarray_area.height * tagsubarray_area.width * CONVERT_TO_MMSQUARE;


  fixed_tracks_internal = colmux + predecode + assoc;
  fixed_tracks_external = colmux + assoc + addresslines;
  variable_tracks = tag;

  if (SB == 0)
    {
      if (Ndbl * Ndwl == 1)
	{
	  total_height =
	    tagsubarray_area.height + fixed_tracks_external + tag;
	  total_width = tagsubarray_area.width + predecode;
	}
      else
	{
	  total_height =
	    2 * tagsubarray_area.height + fixed_tracks_external + tag;
	  total_width = tagsubarray_area.width + predecode;
	}
    }
  if (SB == 1)
    {
      total_height = tagsubblock_area.height;
      total_width = tagsubblock_area.width;
    }
  if (SB == 2)
    {
      total_height = tagsubblock_area.height;
      total_width = 2 * tagsubblock_area.width + fixed_tracks_external + tag;
    }
  if (SB == 4)
    {
      total_height =
	2 * tagsubblock_area.height + fixed_tracks_external + tag;
      total_width =
	2 * tagsubblock_area.width + fixed_tracks_internal +
	variable_tracks / 2;
    }
  if (SB == 8)
    {
      total_height =
	2 * tagsubblock_area.height + fixed_tracks_internal +
	variable_tracks / 2;
      total_width =
	2 * (2 * tagsubblock_area.width + variable_tracks / 4) +
	fixed_tracks_external + tag;
    }
  if (SB > 8)
    {
      blocks = SB / 4;
	  //v4.1: Fixing double->int type conversion problems. EPSILON is added below to make sure
      //the final int value is the correct one 
      //htree = (int) (logtwo_area ((double) (blocks)));
	  htree = (int) (logtwo_area ((double) (blocks)) + EPSILON);
      inter_height = tagsubblock_area.height;
      inter_width = tagsubblock_area.width;
      multiplier = 1;

      if (htree % 2 == 0)
	{
	  iter_height = htree / 2;
	}

      if (htree % 2 == 0)
	{
	  for (i = 0; i <= iter_height; i++)
	    {
	      if (i == iter_height)
		{
		  total_height =
		    2 * inter_height + tag / blocks * multiplier +
		    fixed_tracks_external;
		  total_width =
		    2 * inter_width + tag / (2 * blocks) * multiplier +
		    fixed_tracks_internal;}
	      else
		{
		  total_height =
		    2 * inter_height + tag / blocks * multiplier +
		    fixed_tracks_internal;
		  total_width =
		    2 * inter_width + tag / (2 * blocks) * multiplier +
		    fixed_tracks_internal;
		  inter_height = total_height;
		  inter_width = total_width;
		  multiplier = multiplier * 4;
		}
	    }
	}
      else
	{
	  htree_half = htree - 1;
	  iter_height = htree_half / 2;
	  for (i = 0; i <= iter_height; i++)
	    {
	      total_height =
		2 * inter_height + tag / blocks * multiplier +
		fixed_tracks_internal;
	      total_width =
		2 * inter_width + tag / (2 * blocks) * multiplier +
		fixed_tracks_internal;
	      inter_height = total_height;
	      inter_width = total_width;
	      multiplier = multiplier * 4;
	    }
	  total_width =
	    2 * inter_width + tag / (2 * blocks) * multiplier +
	    fixed_tracks_external;
	}
    }

  tagarray_area.width = total_width;
  tagarray_area.height = total_height;

  temp.height = tagarray_area.width;
  temp.width = tagarray_area.height;
  temp_aspect =
    ((temp.height / temp.width) >
     1.0) ? (temp.height / temp.width) : 1.0 / (temp.height / temp.width);
  aspect_ratio_tag =
    ((tagarray_area.height / tagarray_area.width) >
     1.0) ? (tagarray_area.height / tagarray_area.width) : 1.0 /
    (tagarray_area.height / tagarray_area.width);
  if (aspect_ratio_tag > temp_aspect)
    {
      tagarray_area.height = temp.height;
      tagarray_area.width = temp.width;
    }

  aspect_ratio_tag =
    ((tagarray_area.height / tagarray_area.width) >
     1.0) ? (tagarray_area.height / tagarray_area.width) : 1.0 /
    (tagarray_area.height / tagarray_area.width);

  return (tagarray_area);
}

void
area (int baddr,int b0,int Ndbl,int Ndwl,double Nspd,int Ntbl,int Ntwl,int Ntspd,double NSubbanks,parameter_type *parameters,
      arearesult_type *result)
{
  int rows_datasubarray;
  //v4.1. Making colns_datasubarray double datatype since it is dependent on Nspd 
  //which is double. Note that based on its usage below colns_datasubarray is a misnomer. 
  //colns_datasubarray is actually the degree of output muxing. 
  double colns_datasubarray;
  int rows_tagsubarray, colns_tagsubarray;

  rows_datasubarray =
    (parameters->cache_size /
     ((parameters->block_size) * (parameters->data_associativity) * Ndbl * Nspd));
  colns_datasubarray = (Ndbl * Nspd);
  rows_tagsubarray =
    (parameters->cache_size /
     ((parameters->block_size) * (parameters->tag_associativity) * Ntbl * Ntspd));
  colns_tagsubarray = (Ntbl * Ntspd);

  result->dataarray_area =
    dataarray (parameters->cache_size, parameters->block_size,
	       parameters->data_associativity, Ndbl, Ndwl, Nspd, b0,
	       parameters->num_readwrite_ports, parameters->num_read_ports,
	       parameters->num_write_ports,
	       parameters->num_single_ended_read_ports,
	       parameters->fudgefactor);