src/compiler-rt/test/builtins/Unit/fixunsdfti_test.c

   1 //===-- fixunsdfti_test.c - Test __fixunsdfti -----------------------------===//
   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 __fixunsdfti 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 //             tu_int is a 64 bit integral type
  22 //             value in double is representable in tu_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 #ifdef CRT_HAS_128BIT
  28
  29 COMPILER_RT_ABI tu_int __fixunsdfti(double a);
  30
  31 int test__fixunsdfti(double a, tu_int expected)
  32 {
  33     tu_int x = __fixunsdfti(a);
  34     if (x != expected)
  35     {
  36         utwords xt;
  37         xt.all = x;
  38         utwords expectedt;
  39         expectedt.all = expected;
  40         printf("error in __fixunsdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  41                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  42     }
  43     return x != expected;
  44 }
  45
  46 char assumption_1[sizeof(tu_int) == 2*sizeof(du_int)] = {0};
  47 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  48 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  49
  50 #endif
  51
  52 int main()
  53 {
  54 #ifdef CRT_HAS_128BIT
  55     if (test__fixunsdfti(0.0, 0))
  56         return 1;
  57
  58     if (test__fixunsdfti(0.5, 0))
  59         return 1;
  60     if (test__fixunsdfti(0.99, 0))
  61         return 1;
  62     if (test__fixunsdfti(1.0, 1))
  63         return 1;
  64     if (test__fixunsdfti(1.5, 1))
  65         return 1;
  66     if (test__fixunsdfti(1.99, 1))
  67         return 1;
  68     if (test__fixunsdfti(2.0, 2))
  69         return 1;
  70     if (test__fixunsdfti(2.01, 2))
  71         return 1;
  72     if (test__fixunsdfti(-0.5, 0))
  73         return 1;
  74     if (test__fixunsdfti(-0.99, 0))
  75         return 1;
  76 #if !TARGET_LIBGCC
  77     if (test__fixunsdfti(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  78         return 1;
  79     if (test__fixunsdfti(-1.5, 0))
  80         return 1;
  81     if (test__fixunsdfti(-1.99, 0))
  82         return 1;
  83     if (test__fixunsdfti(-2.0, 0))
  84         return 1;
  85     if (test__fixunsdfti(-2.01, 0))
  86         return 1;
  87 #endif
  88
  89     if (test__fixunsdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  90         return 1;
  91     if (test__fixunsdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  92         return 1;
  93
  94 #if !TARGET_LIBGCC
  95     if (test__fixunsdfti(-0x1.FFFFFEp+62, 0))
  96         return 1;
  97     if (test__fixunsdfti(-0x1.FFFFFCp+62, 0))
  98         return 1;
  99 #endif
 100
 101     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
 102         return 1;
 103     if (test__fixunsdfti(0x1.0000000000000p+63, 0x8000000000000000LL))
 104         return 1;
 105     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
 106         return 1;
 107     if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
 108         return 1;
 109
 110     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+127, make_ti(0xFFFFFFFFFFFFF800LL, 0)))
 111         return 1;
 112     if (test__fixunsdfti(0x1.0000000000000p+127, make_ti(0x8000000000000000LL, 0)))
 113         return 1;
 114     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00LL, 0)))
 115         return 1;
 116     if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800LL, 0)))
 117         return 1;
 118     if (test__fixunsdfti(0x1.0000000000000p+128, make_ti(0xFFFFFFFFFFFFFFFFLL,
 119                                                          0xFFFFFFFFFFFFFFFFLL)))
 120         return 1;
 121
 122 #if !TARGET_LIBGCC
 123     if (test__fixunsdfti(-0x1.FFFFFFFFFFFFFp+62, 0))
 124         return 1;
 125     if (test__fixunsdfti(-0x1.FFFFFFFFFFFFEp+62, 0))
 126         return 1;
 127 #endif
 128
 129 #endif
 130    return 0;
 131 }