/*---------------------------------------------------------*\
    Ficheiro:     MATCHROM.C
    Alteração:    03-05-96
    ALterado por: A.Esteves
\*---------------------------------------------------------*/

#include "datadef.h"

/*    INSTRUÇÕES DE MATCH     */

void match (void)   /* MD0 | MD1 | ZERO,CY_IN */
{    
        /* tag = alu_output( match )  */

  tag[0] = ms[0] & md0[0] & md1[0]; 
  tag[1] = ms[1] & md0[1] & md1[1];

        /* cy = alu_output( or_match ) */

  switch (linhas)            
   {
     case 111 : /* MD0 MD1 CY_IN // usado em or_match() */
                cy[0] = cy[0] | tag[0];
                cy[1] = cy[1] | tag[1];
                break;

     case 114: /* MD0 MD1 ZERO // usado em match() */
                cy[0] = tag[0];
                cy[1] = tag[1];
                break;
     default :  erro("\nERRO na funcao match() \n"); break;
    }
}

/*################################################################*/

void tag_match (void)       /* MD0 | MD1,TAG_IN | DCARE */
{
  /* tag = alu_output( match )  */
  switch(linhas)
  {
    case  112 : /* MD0 MD1 DCARE // usado em tag_match() */
                tag[0] = ms[0] & md0[0] & md1[0];
                tag[1] = ms[1] & md0[1] & md1[1];
                break;
    case  142 : /* MD0 TAG_IN DCARE // usado em clear_not_subset() */
                tag[0] = ms[0] & md0[0] & tag[0];
                tag[1] = ms[1] & md0[1] & tag[1];
                break;
    default         : erro("\nERRO na funcao tag_match() \n"); break;
  }
}

/*################################################################*/

void cy_match (void)        /* MD0 | MD1 | ZERO */
{
   /* cy = alu_output( or_match ) */

  switch(linhas)
  {
    case  114 : /* MD0 MD1 ZERO // usado em tag_match() */
        cy[0] = ms[0] & md0[0] & md1[0];
        cy[1] = ms[1] & md0[1] & md1[1];
        break;

    default : erro("\nERRO na funcao cy_match() \n"); break;
  }
}

/*################################################################*/

void and_match (void)       /* NOT_MD0 | TAG_IN,NOT_MD1 | CY_IN,ZERO */
{
  /* cy = alu_output ( cy_out ) */

  ms[0]=msbak[0];   /* Hold ms */
  ms[1]=msbak[1];
  switch(linhas)
  {
    case 341 : /* NOT_MD0  TAG_IN CY_IN */
          cy[0]=(((~md0[0])^tag[0])&cy[0])|((~md0[0])&tag[0]);
          cy[1]=(((~md0[1])^tag[1])&cy[1])|((~md0[1])&tag[1]);
          break;
/*
    case 344 : NOT_MD0 TAG_IN ZERO
          cy[0]=((~md0[0])&tag[0]);
          cy[1]=((~md0[1])&tag[1]);
          break;

    case 331 : NOT_MD0 NOT_MD1 CY_IN
          cy[0]=(((~md0[0])^(~md1[0]))&cy[0])|((~md0[0])&(~md1[0]));
          cy[1]=(((~md0[1])^(~md1[1]))&cy[1])|((~md0[1])&(~md1[1]));
          break;
*/
    case 334 : /* NOT_MD0 NOT_MD1 ZERO */
          cy[0]=((~md0[0])&(~md1[0]));
          cy[1]=((~md0[1])&~(md1[1]));
          break;

    default  : erro("\nERRO na funcao and_match() \n"); break;
  }
  
}

/*################################################################*/