Archipelago » qemu

#include <stdio.h>

#include <stdlib.h>

#include <stdint.h>

#include "sys.h"

extern inline int cris_lz(int x)

{

        int r;

        asm ("lz\t%1, %0\n" : "=r" (r) : "r" (x));

        return r;

}

void check_lz(void)

{

        int i;

        if (cris_lz(0) != 32)

                err();

        if (cris_lz(1) != 31)

                err();

        if (cris_lz(2) != 30)

                err();

        if (cris_lz(4) != 29)

                err();

        if (cris_lz(8) != 28)

                err();

        /* try all positions with a single bit.  */

        for (i = 1; i < 32; i++) {

                if (cris_lz(1 << (i-1)) != (32 - i))

                        err();

        }

        /* try all positions with all bits.  */

        for (i = 1; i < 32; i++) {

                /* split up this computation to clarify it.  */

                uint32_t val;

                val = (unsigned int)-1 >> (32 - i);

                if (cris_lz(val) != (32 - i))

                        err();

        }

}

int main(void)

{

        check_lz();

        pass();

        exit(0);

}