1 #include <stdio.h>

     2 #include <stdlib.h>

     3 #include <stdint.h>

     4 #include "sys.h"

     5 

     6 extern inline int cris_lz(int x)

     7 {

     8 	int r;

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

    10 	return r;

    11 }

    12 

    13 void check_lz(void)

    14 {

    15 	int i;

    16 

    17 	if (cris_lz(0) != 32)

    18 		err();

    19 	if (cris_lz(1) != 31)

    20 		err();

    21 	if (cris_lz(2) != 30)

    22 		err();

    23 	if (cris_lz(4) != 29)

    24 		err();

    25 	if (cris_lz(8) != 28)

    26 		err();

    27 

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

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

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

    31 			err();

    32 	}

    33 

    34 	/* try all positions with all bits.  */

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

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

    37 		uint32_t val;

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

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

    40 			err();

    41 	}

    42 }

    43 

    44 int main(void)

    45 {

    46 	check_lz();

    47 	pass();

    48 	exit(0);

    49 }