File: ffssi2_test.c

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (46 lines) | stat: -rw-r--r-- 1,137 bytes parent folder | download | duplicates (26) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
 
// RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_ffssi2

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

// Returns: the index of the least significant 1-bit in a, or
// the value zero if a is zero. The least significant bit is index one.

COMPILER_RT_ABI int __ffssi2(si_int a);

int test__ffssi2(si_int a, int expected)
{
    int x = __ffssi2(a);
    if (x != expected)
        printf("error in __ffssi2(0x%X) = %d, expected %d\n", a, x, expected);
    return x != expected;
}

int main()
{
    if (test__ffssi2(0x00000000, 0))
        return 1;
    if (test__ffssi2(0x00000001, 1))
        return 1;
    if (test__ffssi2(0x00000002, 2))
        return 1;
    if (test__ffssi2(0x00000003, 1))
        return 1;
    if (test__ffssi2(0x00000004, 3))
        return 1;
    if (test__ffssi2(0x00000005, 1))
        return 1;
    if (test__ffssi2(0x0000000A, 2))
        return 1;
    if (test__ffssi2(0x10000000, 29))
        return 1;
    if (test__ffssi2(0x20000000, 30))
        return 1;
    if (test__ffssi2(0x60000000, 30))
        return 1;
    if (test__ffssi2(0x80000000u, 32))
        return 1;

   return 0;
}