sys/external/bsd/compiler_rt/dist/test/Unit/clzti2_test.c

   1 //===-- clzti2_test.c - Test __clzti2 -------------------------------------===//
   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 __clzti2 for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #if __x86_64
  15
  16 #include "int_lib.h"
  17 #include <stdio.h>
  18
  19 // Returns: the number of leading 0-bits
  20
  21 // Precondition: a != 0
  22
  23 si_int __clzti2(ti_int a);
  24
  25 int test__clzti2(ti_int a, si_int expected)
  26 {
  27     si_int x = __clzti2(a);
  28     if (x != expected)
  29     {
  30         twords at;
  31         at.all = a;
  32         printf("error in __clzti2(0x%llX%.16llX) = %d, expected %d\n",
  33                at.s.high, at.s.low, x, expected);
  34     }
  35     return x != expected;
  36 }
  37
  38 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  39
  40 #endif
  41
  42 int main()
  43 {
  44 #if __x86_64
  45     const int N = (int)(sizeof(ti_int) * CHAR_BIT);
  46
  47     if (test__clzti2(0x00000001, N-1))
  48         return 1;
  49     if (test__clzti2(0x00000002, N-2))
  50         return 1;
  51     if (test__clzti2(0x00000003, N-2))
  52         return 1;
  53     if (test__clzti2(0x00000004, N-3))
  54         return 1;
  55     if (test__clzti2(0x00000005, N-3))
  56         return 1;
  57     if (test__clzti2(0x0000000A, N-4))
  58         return 1;
  59     if (test__clzti2(0x1000000A, N*3/4+3))
  60         return 1;
  61     if (test__clzti2(0x2000000A, N*3/4+2))
  62         return 1;
  63     if (test__clzti2(0x6000000A, N*3/4+1))
  64         return 1;
  65     if (test__clzti2(0x8000000AuLL, N*3/4))
  66         return 1;
  67     if (test__clzti2(0x000005008000000AuLL, 85))
  68         return 1;
  69     if (test__clzti2(0x020005008000000AuLL, 70))
  70         return 1;
  71     if (test__clzti2(0x720005008000000AuLL, 65))
  72         return 1;
  73     if (test__clzti2(0x820005008000000AuLL, 64))
  74         return 1;
  75
  76     if (test__clzti2(make_ti(0x0000000080000000LL, 0x8000000800000000LL), 32))
  77         return 1;
  78     if (test__clzti2(make_ti(0x0000000100000000LL, 0x8000000800000000LL), 31))
  79         return 1;
  80     if (test__clzti2(make_ti(0x1000000100000000LL, 0x8000000800000000LL), 3))
  81         return 1;
  82     if (test__clzti2(make_ti(0x7000000100000000LL, 0x8000000800000000LL), 1))
  83         return 1;
  84     if (test__clzti2(make_ti(0x8000000100000000LL, 0x8000000800000000LL), 0))
  85         return 1;
  86 #else
  87     printf("skipped\n");
  88 #endif
  89    return 0;
  90 }