sys/external/bsd/compiler_rt/dist/test/Unit/clzdi2_test.c

   1 //===-- clzdi2_test.c - Test __clzdi2 -------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file tests __clzdi2 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 // Returns: the number of leading 0-bits
  18
  19 // Precondition: a != 0
  20
  21 si_int __clzdi2(di_int a);
  22
  23 int test__clzdi2(di_int a, si_int expected)
  24 {
  25     si_int x = __clzdi2(a);
  26     if (x != expected)
  27         printf("error in __clzdi2(0x%llX) = %d, expected %d\n", a, x, expected);
  28     return x != expected;
  29 }
  30
  31 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  32
  33 int main()
  34 {
  35     const int N = (int)(sizeof(di_int) * CHAR_BIT);
  36 //    if (test__clzdi2(0x00000000, N))  // undefined
  37 //        return 1;
  38     if (test__clzdi2(0x00000001, N-1))
  39         return 1;
  40     if (test__clzdi2(0x00000002, N-2))
  41         return 1;
  42     if (test__clzdi2(0x00000003, N-2))
  43         return 1;
  44     if (test__clzdi2(0x00000004, N-3))
  45         return 1;
  46     if (test__clzdi2(0x00000005, N-3))
  47         return 1;
  48     if (test__clzdi2(0x0000000A, N-4))
  49         return 1;
  50     if (test__clzdi2(0x1000000A, N/2+3))
  51         return 1;
  52     if (test__clzdi2(0x2000000A, N/2+2))
  53         return 1;
  54     if (test__clzdi2(0x6000000A, N/2+1))
  55         return 1;
  56     if (test__clzdi2(0x8000000AuLL, N/2))
  57         return 1;
  58     if (test__clzdi2(0x000005008000000AuLL, 21))
  59         return 1;
  60     if (test__clzdi2(0x020005008000000AuLL, 6))
  61         return 1;
  62     if (test__clzdi2(0x720005008000000AuLL, 1))
  63         return 1;
  64     if (test__clzdi2(0x820005008000000AuLL, 0))
  65         return 1;
  66
  67    return 0;
  68 }