main.c

ADS环境下软中断实现64位整数加法 运行于arm920T

#include <stdio.h>
#include "swi.h"

unsigned *swi_vec = (unsigned *)0x08;

extern void SWI_Handler(void);


unsigned Install_Handler( unsigned routine, unsigned *vector )
{
    unsigned vec, old_vec;

    vec = (routine - (unsigned)vector - 8) >> 2;
    if (vec & 0xff000000)
    {
        printf("Handler greater than 32MBytes from vector");
    }
    vec = 0xea000000 | vec;     /* OR in 'branch always' code */

    old_vec = *vector;
    *vector = vec;
    return (old_vec);
}

int main( void )
{
    unsigned long long input1,input2;
    unsigned int firstL,firstH,secondL,secondH;
    void * resultPtr;
    
    printf("Please input the first 64 bits integer numbers:");
    scanf("%lld",&input1);
    printf("Please input the second 64 bits integer numbers:");
    scanf("%lld",&input2);
   	firstL = (unsigned int)input1;
   	firstH = (unsigned int)(input1>>32);
   	secondL = (unsigned int)input2;
   	secondH = (unsigned int)(input2>>32);
   	
   	Install_Handler( (unsigned) SWI_Handler, swi_vec );
   	resultPtr = add_64( firstL,firstH,secondL,secondH );
    printf("The sum is: %llu",((unsigned long long *)resultPtr)[0]);
    return 0;
}