#include <p32xxxx.h>
#include "db_utils.h"
#include "registers.h"

int i, j;
int n;
int a[10];

int main()
{
    /* Hello World */
     char name[80];
     DBPRINTF("\n\nBasic Starter Kit Lab (" __DATE__ ", " __TIME__")\n\n");
     DBPRINTF("What is your name?\n");
     i = 0;		/* name not reinitialized between runs */
     while (i++<=25) name[i] = '\0';
     DBGETS(name,24);
     DBPRINTF("Hello, %s!\n", name);

n = Initialize_Globals();
	DBPRINTF("\nExpect three and four from Initialize_Globals:\n");
	DBPRINTF("Value of i = %d and j = %d\n", i, j);
	DBPRINTF("\nInitalize_Globals returns five:\n");
	DBPRINTF("Returned n = %d\n", n);

	DBPRINTF("\nReturn_7 should return seven:\n");
	DBPRINTF("Return_7 VALUE = %d\n", Return_7());
/* ------------------------------------------------ */
	Global_Array();	
/* -------------------------------------------------- */

	DBPRINTF("\nAn array of 10 values has been generated:\n");

	i=-1;

	while (++i < 10)
		DBPRINTF("a[%d] = %d\n", i, a[i]);

	DBPRINTF("\nSum of array = %d\n", j);

	n = PassParameters(5, 10, 15, 20, 25);
	DBPRINTF("\nPassParameters returned: %d\n", n);

	n = Calculate(50.3, 100.0, 250);
	DBPRINTF("\nCalculate returned: %d\n", n);

	DBPUTS("\nProgram terminated. \n");
	DBPUTS("Click HALT=F5 and then RESET=F6 to stop the microcontroller.\n");

	return 0;

}   /* >>>>>>>>>>>>>>>End Main<<<<<<<<<<<<<<< */


int Initialize_Globals()		/* Write-Only Parameters */
{
	asm("	ori %0, $0, 3 ; ori %1, $0, 4	“
	           : "=r" (i), "=r" (j)
       );		
	return 5;
}


int Return_7()                    /* Read-Only Parameters */
{
	asm("ori $v0, $0, %0" :: "n" (7));
}

void Global_Array()	         /* Read and Write Parameters */
{	asm("   .set noreorder 			;\
			addiu	$sp, $sp, -12		;\
			sw	$t0, 0($sp)		;\
			sw	$t1, 4($sp)		;\
			sw	$t2, 8($sp)		;\
			ori	$t0, $0, 0		;\
			or	$t1, $0, %2		;\
			or	$t2, $0, %1		;\
			add	$t2, $t2, $t1		;\
		1:  	addiu	$t2, $t2, -4		;\
			sw	$t1, 0($t2)		;\
			add	$t0, $t0, $t1		;\
			addiu	$t1, $t1 ,-4		;\
			bnez	$t1, 1b			;\
			or	%0, $0, $t0		;\
			lw	$t2, 8($sp)		;\
			lw	$t1, 4($sp)		;\
			lw	$t0, 0($sp)		;\
			addiu	$sp, $sp, 12		;\
		   .set reorder				;\
	      "						\
		:	"=r" (j) 			\
		:	"r" (a), "n" (40) 		\
	/*	:	"$8", "$9", "$10" */ /*defines fail!*/	\
	     );
}

int PassParameters(int x, int y, int z, int s, int t)
{
	asm("lw $v0,8($sp)"); /* returns x not t */
}

int Calculate(double p, double q, int r)
{
	asm("lw $v0,24($sp)"); /* returns r! */
}