codeavr.c

Outputs messages to a 2line LCD

	else
  	if (stkptr && stpt->type == CLONG) {
		if (stkptr && stpt->storage == PUBLIC) {
         ot("lds\tr31,");
         outstr(stack[stkptr].name);
         outstr("+0\n");
         ot("lds\tr30,");
         outstr(stack[stkptr].name);
         outstr("+1\n");
         ot("lds\tr27,");
         outstr(stack[stkptr].name);
         outstr("+2\n");
         ot("lds\tr26,");
         outstr(stack[stkptr].name);
         outstr("+3\n");
         stkptr--;
         }
     	else {
      	if (stkptr) {
	      	ot("ldi\tr31,high(");
	         outstr(stack[stkptr].name);
	         outstr(")\n");
	         ot("ldi\tr30,low(");
	         outstr(stack[stkptr].name);
	         outstr(")\n");
	         stkptr--;
	         }
	      else {
	     		ol("ldd\tr26,z+3");
	      	ol("ldd\tr27,z+2");
	      	ol("ldd\tr0,z+1");
	      	ol("ldd\tr31,z+0");
	      	ol("mov\tr30,r0");
	         }
			}
 		return;
   	}

   if (stpt->cast && stpt->ident == POINTER)
   	error("Cannot cast a pointer");
   else {
   	if (stpt->cast == CLONG) {
      	if (stpt->type == CCHAR || stpt->type == UCCHAR) {
         	ot("lds\tr26,");
            NamePrefix();
            outstr(symtab[ptr].name);
            nl();
            if (stpt->type == UCCHAR)
            	gcall("ucharlong_ext", CINT);
            else
					gcall("charlong_ext", CINT);
            }
         else
         if (stpt->type == CINT) {
				ot("lds\tr27,");
				NamePrefix();
				outstr(symtab[ptr].name);
				nl();
				ot("lds\tr26,");
				NamePrefix();
				outstr(symtab[ptr].name);
				outstr("+1");
				nl();
				sign_extend_long(stpt);
            }
         else
            GetMemLong(ptr, stpt->offset);
			}
      else
      if (stpt->cast == CINT) {
      	if (stpt->type == CCHAR || stpt->type == UCCHAR) {
//         	GetMemChar(ptr, stpt->offset);
            sign_extend_int(stpt);
            stpt->type = CINT;
            }
         else
         if (stpt->type == CLONG) {
				ot("lds\tr31,");
				NamePrefix();
				outstr(symtab[ptr].name);
            outstr("+2");
				nl();
				ot("lds\tr30,");
				NamePrefix();
				outstr(symtab[ptr].name);
				outstr("+3");
				nl();
            }
         else
         	GetMemInt(ptr, stpt->offset);
        	}
      else
      if (stpt->cast == CCHAR) {
      	if (stpt->type == CLONG) {
				ot("lds\tr30,");
				NamePrefix();
				outstr(symtab[ptr].name);
				outstr("+3");
				nl();
            }
         else
         if (stpt->type == CINT) {
				ot("lds\tr30,");
				NamePrefix();
				outstr(symtab[ptr].name);
				outstr("+1");
				nl();
            }
         else
         	GetMemChar(ptr, stpt->offset);
         }
      }
}



void sign_extend_int(STATE *stpt) {
  	if (stpt->type == UCCHAR) {
   	if (InX)
   		ol("clr\tr27");
      else
      	ol("clr\tr31");
      }
   else {
   	if (InX)
			gcall("sextx", CINT);
      else
      	gcall("sextz", CINT);
      }
}


void sign_extend_long(STATE *stpt) {
  	if (stpt->type == UCINT)
   	gcall("uintlong_ext", CINT);
   else
		gcall("intlong_ext", CINT);
}


void char2long_sign_extend(STATE *stpt) {
	ol("mov\tr26,r30");
  	if (stpt->type == UCCHAR)
   	gcall("ucharlong_ext", CINT);
   else
		gcall("charlong_ext", CINT);
}



static GetMemChar(int ptr, int offset) {
	ot("lds\tr26,");
	NamePrefix();
	outstr(symtab[ptr].name);
   if (offset) {
     	outstr("+");
      onum(offset);
      }
	nl();
   ol("clr\tr27");
   InX = 1;
}


static GetMemInt(int ptr, int offset) {
	ot("lds\tr27,");
	NamePrefix();
	outstr(symtab[ptr].name);
   if (offset) {
     	outstr("+");
      onum(offset);
      }
	nl();
	ot("lds\tr26,");
	NamePrefix();
	outstr(symtab[ptr].name);
   if (offset) {
     	outstr("+");
      onum(offset);
      }
	outstr("+1");
	nl();
   InX = 1;
}


static GetMemLong(int ptr, int offset) {
	ot("llds\t");
	NamePrefix();
	outstr(symtab[ptr].name);
   if (offset) {
     	ot("+");
      onum(offset);
      }
	nl();
}


// fetch the address of the specified symbol into the primary register

void getloc(STATE *stpt) {
	int k, ptr;
	
	ptr = stpt->ptr;
	if (symtab[ptr].storage == LSTATIC) {
		immed(stpt);
		printlabel(glint(ptr));
		nl();
		}
	else {
   	if (stpt->type == CLONG) {
			ol("mov\tr30,r28");
			ol("mov\tr31,r29");
			k = glint(ptr) - stkp;
	      if (k < 0)
	      	error("Internal error - negative variable offset");
			if (k) {
				ot("adiw\tr30,");
				outdec(k);
				nl();
				}
	      InX = 0;
			}
   	else {
      	if (PointerFlag) {
         	ol("mov\tr30,r28");
            ol("mov\tr31,r29");
            InX = 0;
            }
         else {
				ol("mov\tr26,r28");
				ol("mov\tr27,r29");
            InX = 1;
            }
			k = glint(ptr) - stkp;
	      if (k < 0)
	      	error("Internal error - negative variable offset");
         if (stpt->funcpar)
         	k++;
			if (k) {
         	if (PointerFlag)
					ot("adiw\tr30,");
            else
            	ot("adiw\tr26,");
				outdec(k);
				nl();
				}
	      if (PointerFlag)
        		InX = 0;
         else
	      	InX = 1;
			}
   	}
}



// Store the correct register into the specified static memory cell.
// If the SubFlag is TRUE, then store the secondary register, else
// store the primary.

void putmem(STATE *stpt) {
	char ttt[100], *pt;

	strcpy(ttt, symtab[stpt->ptr].name);
	pt = ttt + strlen(ttt) - 1;
	while ((*pt == '\t') || (*pt == ' '))
		*pt-- = '\0';

	if (symtab[stpt->ptr].ident != POINTER && (symtab[stpt->ptr].type == CCHAR || symtab[stpt->ptr].type == UCCHAR)) {
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
 		if (InX)
   		outstr(",r26");
      else
      	outstr(",r30");
		} 
	else
   if (symtab[stpt->ptr].ident != POINTER && symtab[stpt->ptr].type == CLONG) {
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
      outstr(",r31");
		nl();
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
      outstr("+1,r30");
      nl();
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
      outstr("+2,r27");
		nl();
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
      outstr("+3,r26");
      }
   else
   if (stpt->ident == ARRAY) {
      if (stpt->type == CCHAR || stpt->type == UCCHAR) {
      	ot("st\tx,r30");
         }
      else {
      	ol("st\t-x,r30");
         ot("st\t-x,r31");
         }
      }
   else {
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
      if (InX)
      	outstr(",r27\n");
      else
      	outstr(",r31\n");
		ot("sts\t");
		NamePrefix();
		outstr(ttt);
      if (InX)
      	outstr("+1,r26");
      else
      	outstr("+1,r30");
		}
	nl();
}


// Store a register variable

void putreg(STATE *stpt) {
	int reg;

	reg = symtab[stpt->ptr].reg & ~CONSTANT;
   if (stpt->ident == POINTER || stpt->type == CINT || stpt->type == UCINT) {
      ot("mov\tr");
      onum(reg);
      if (InX)
      	outstr(",r27\n");
      else
      	outstr(",r31\n");
      ot("mov\tr");
      onum(reg - 1);
      if (InX)
      	outstr(",r26\n");
      else
      	outstr(",r30\n");
      }
   else
	if (stpt->type == CCHAR || stpt->type == UCCHAR) {
     	ot("mov\tr");
     	onum(reg);
     	outstr(",r30\n");
      }
   else
   if (stpt->type == CLONG) {
      ot("mov\tr");
      onum(reg);
      outstr(",r31");
      nl();
      ot("mov\tr");
      onum(reg - 1);
      outstr(",r30");
      nl();
      ot("mov\tr");
      onum(reg - 2);
      outstr(",r27");
      nl();
      ot("mov\tr");
      onum(reg - 3);
      outstr(",r26");
      nl();
      }
}


// load a register variable into primary

void getreg(STATE *stpt) {
	int reg;

	reg = symtab[stpt->ptr].reg & ~CONSTANT;

   if (stpt->cast == 0) {
		if (stpt->ident == POINTER || stpt->type == CINT || stpt->type == UCINT) {
	      ot("mov\tr31,r");
	      onum(reg);
	      nl();
	      ot("mov\tr30,r");
	      onum(reg - 1);
	      nl();
         InX = 0;
	      }
	   else
		if (stpt->type == CCHAR || stpt->type == UCCHAR) {
	      ot("mov\tr30,r");
	      onum(reg);
	      nl();
         if (IfFlag || Indexing || CallFunction)
         	sign_extend_int(stpt);
	      }
	   else
	   if (stpt->type == CLONG) {
	      ot("mov\tr31,r");
	      onum(reg);
	      nl();
	      ot("mov\tr30,r");
	      onum(reg - 1);
	      nl();
	      ot("mov\tr27,r");
	      onum(reg - 2);
	      nl();
	      ot("mov\tr26,r");
	      onum(reg - 3);
	      nl();
	     	}
      }
 	else
   if (stpt->ident == POINTER)
     	error("Cannot cast a pointer");
   else {
     	if (stpt->cast == CLONG) {
        	if (stpt->type == CCHAR) {
         	ot("mov\tr26,r");
            onum(reg);
            nl();
            gcall("charlong_ext", CINT);
            }
         else
         if (stpt->type == CINT) {
         	ot("mov\tr26,r");
            onum(reg - 1);
            nl();
            ot("mov\tr27,r");
            onum(reg);
            nl();
            sign_extend_long(stpt);
            }
		   else
		   if (stpt->type == CLONG) {
		      ot("mov\tr31,r");
		      onum(reg);
		      nl();
		      ot("mov\tr30,r");
		      onum(reg - 1);
		      nl();
		      ot("mov\tr27,r");
		      onum(reg - 2);
		      nl();
		      ot("mov\tr26,r");
		      onum(reg - 3);
		      nl();
		     	}
        	stpt->type = CLONG;
         }
      else
      if (stpt->cast == CINT) {
       	if (stpt->type == CCHAR) {
				ot("mov\tr30,r");
            onum(reg);
            nl();
            sign_extend_int(stpt);
            }
         else
         if (stpt->type == CLONG) {
				ot("mov\tr30,r");
            onum(reg - 3);
            nl();
            ot("mov\tr31,r");
            onum(reg - 2);
            nl();
            }
         else
         if (stpt->type == CINT) {
         	ot("mov\tr31,r");
            onum(reg);
            nl();
            ot("mov\tr30,r");
            onum(reg - 1);
            nl();
            }
         stpt->type = CINT;
         }
      else
      if (stpt->cast == CCHAR) {
      	if (stpt->type == CINT || stpt->type == UCINT) {
         	ot("mov\tr30,r");
            onum(reg - 1);
            nl();
            }
         else
         if (stpt->type == CLONG) {
         	ot("mov\tr30,r");
         	onum(reg - 3);
         	nl();
            }
         else
        	if (stpt->type == CCHAR || stpt->type == UCCHAR) {
         	ot("mov\tr30,r");
            onum(reg);
            nl();
            }
         stpt->type = CCHAR;
         }
      stpt->cast = 0;
      }
 	InX = 0;
}


// Long variable sign extend

void long_sign_extend(STATE *stpt) {
   if (!InX) {
   	ol("mov\tr26,r30");
   	ol("mov\tr27,r31");
      }
	sign_extend_long(stpt);
}


// Int variable sign extend

void int_sign_extend(STATE *stpt) {
   sign_extend_int(stpt);
}


// Convert a long to int

void long2int(STATE *st2pt) {
   x2z();
}


void x2z(void) {
   ol("mov\tr30,r26");
   ol("mov\tr31,r27");
}


// store the specified object type in the primary register
// at the address on the top of the stack

void putstk(STATE *stpt, int flag) {

   if (stpt->ident == POINTER && !flag) {
      if (stkptr) {
      	ot("sts\t");
         outstr(stack[stkptr].name);
         if (InX)
         	outstr(",r27\n");
         else
         	outstr(",r31\n");
         ot("sts\t");
         outstr(stack[stkptr].name);
         if (InX)
         	outstr("+1,r26\n");
         else
         	outstr("+1,r30\n");
         stkptr--;
      	}
      else {
   		if (InX)
   			gcall("putstk_i_x", CINT);
			else
   			gcall("putstk_i_z", CINT);
   		stkp += INTSIZE;
         }
		}
   else
	if (stpt->type == CCHAR || stpt->type == UCCHAR) {
      if (stkptr) {
      	ot("sts\t");
         outstr(stack[stkptr].name);
         if (InX)
         	outstr(",r26\n");
         else
         	outstr(",r30\n");
         stkptr--;
      	}
      else {
      	if (InX) {
         	ol("mov\tr30,r26");
            if (symtab[osymptr].type == CINT)
            	ol("mov\tr31,r27");
            InX = 0;
            }
  			gpop(CINT);
//         if (stpt->funcpar)
//         	ol("adiw\tr26,1")
//			if (InX)
//				ol("st\tz,r26");
//			else
				ol("st\tx,r30");					// pchar code
         InX = 0;								// actual value is now in Z
         }
		}
	else
   if (stpt->type == CLONG) {
      if (stkptr) {
      	ot("sts\t");
         outstr(stack[stkptr].name);
        	outstr("+0,r31\n");
      	ot("sts\t");
         outstr(stack[stkptr].name);
        	outstr("+1,r30\n");
      	ot("sts\t");
         outstr(stack[stkptr].name);