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

   1 //===-- fixunsdfdi_test.c - Test __fixunsdfdi -----------------------------===//
   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 __fixunsdfdi for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 // Returns: convert a to a unsigned long long, rounding toward zero.
  18 //          Negative values all become zero.
  19
  20 // Assumption: double is a IEEE 64 bit floating point type
  21 //             du_int is a 64 bit integral type
  22 //             value in double is representable in du_int or is negative
  23 //                 (no range checking performed)
  24
  25 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  26
  27 du_int __fixunsdfdi(double a);
  28
  29 int test__fixunsdfdi(double a, du_int expected)
  30 {
  31     du_int x = __fixunsdfdi(a);
  32     if (x != expected)
  33         printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected);
  34     return x != expected;
  35 }
  36
  37 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
  38 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  39 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  40
  41 int main()
  42 {
  43     if (test__fixunsdfdi(0.0, 0))
  44         return 1;
  45
  46     if (test__fixunsdfdi(0.5, 0))
  47         return 1;
  48     if (test__fixunsdfdi(0.99, 0))
  49         return 1;
  50     if (test__fixunsdfdi(1.0, 1))
  51         return 1;
  52     if (test__fixunsdfdi(1.5, 1))
  53         return 1;
  54     if (test__fixunsdfdi(1.99, 1))
  55         return 1;
  56     if (test__fixunsdfdi(2.0, 2))
  57         return 1;
  58     if (test__fixunsdfdi(2.01, 2))
  59         return 1;
  60     if (test__fixunsdfdi(-0.5, 0))
  61         return 1;
  62     if (test__fixunsdfdi(-0.99, 0))
  63         return 1;
  64 #if !TARGET_LIBGCC
  65     if (test__fixunsdfdi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  66         return 1;
  67     if (test__fixunsdfdi(-1.5, 0))
  68         return 1;
  69     if (test__fixunsdfdi(-1.99, 0))
  70         return 1;
  71     if (test__fixunsdfdi(-2.0, 0))
  72         return 1;
  73     if (test__fixunsdfdi(-2.01, 0))
  74         return 1;
  75 #endif
  76
  77     if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  78         return 1;
  79     if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  80         return 1;
  81
  82 #if !TARGET_LIBGCC
  83     if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0))
  84         return 1;
  85     if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0))
  86         return 1;
  87 #endif
  88
  89     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
  90         return 1;
  91     if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL))
  92         return 1;
  93     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  94         return 1;
  95     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  96         return 1;
  97
  98 #if !TARGET_LIBGCC
  99     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
 100         return 1;
 101     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
 102         return 1;
 103 #endif
 104
 105    return 0;
 106 }