#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); }