altfp_add_sub

i'm so sorry for my poor english

i use the method PIO to test the bloc altfp_add_sub in quartus all steps are al right in quatus when i want to execute this bloc altfp _add_sub in niosII with fpga 2S60ES

the results in the console of niosII is 0.000 i don't khnow where is my pb

the programme that i use is here:

# include <math.h>

# include <stdio.h>

# include <string.h>

# include <stdlib.h>

# include "system.h"

# include "alt_types.h"

# include <time.h>

# include <unistd.h>

# include <sys/alt_timestamp.h>

# include "sys/alt_irq.h"

# include "altera_avalon_pio_regs.h"

void main( void)

{

float val=1.1;

int i;

IOWR_ALTERA_AVALON_PIO_DATA(PIO_3_BASE, 0);// aclr pin

IOWR_ALTERA_AVALON_PIO_DATA(PIO_3_BASE, 1);//aclr pin

//

IOWR_ALTERA_AVALON_PIO_DATA(PIO_2_BASE, 0);//clk-en

IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, 1.2);//

IOWR_ALTERA_AVALON_PIO_DATA(PIO_1_BASE, 2.3);

for(i=0;i<6400;i++)

{

val=IORD_ALTERA_AVALON_PIO_DATA(PIO_5_BASE);

}

}

please help me and so sorry for my poor english