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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsdfti
   3 // REQUIRES: int128
   4
   5 #include "int_lib.h"
   6 #include <stdio.h>
   7
   8 // Returns: convert a to a unsigned long long, rounding toward zero.
   9 //          Negative values all become zero.
  10
  11 // Assumption: double is a IEEE 64 bit floating point type
  12 //             tu_int is a 64 bit integral type
  13 //             value in double is representable in tu_int or is negative
  14 //                 (no range checking performed)
  15
  16 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  17
  18 #ifdef CRT_HAS_128BIT
  19
  20 COMPILER_RT_ABI tu_int __fixunsdfti(double a);
  21
  22 int test__fixunsdfti(double a, tu_int expected)
  23 {
  24     tu_int x = __fixunsdfti(a);
  25     if (x != expected)
  26     {
  27         utwords xt;
  28         xt.all = x;
  29         utwords expectedt;
  30         expectedt.all = expected;
  31         printf("error in __fixunsdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  32                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  33     }
  34     return x != expected;
  35 }
  36
  37 char assumption_1[sizeof(tu_int) == 2*sizeof(du_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 #endif
  42
  43 int main()
  44 {
  45 #ifdef CRT_HAS_128BIT
  46     if (test__fixunsdfti(0.0, 0))
  47         return 1;
  48
  49     if (test__fixunsdfti(0.5, 0))
  50         return 1;
  51     if (test__fixunsdfti(0.99, 0))
  52         return 1;
  53     if (test__fixunsdfti(1.0, 1))
  54         return 1;
  55     if (test__fixunsdfti(1.5, 1))
  56         return 1;
  57     if (test__fixunsdfti(1.99, 1))
  58         return 1;
  59     if (test__fixunsdfti(2.0, 2))
  60         return 1;
  61     if (test__fixunsdfti(2.01, 2))
  62         return 1;
  63     if (test__fixunsdfti(-0.5, 0))
  64         return 1;
  65     if (test__fixunsdfti(-0.99, 0))
  66         return 1;
  67 #if !TARGET_LIBGCC
  68     if (test__fixunsdfti(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  69         return 1;
  70     if (test__fixunsdfti(-1.5, 0))
  71         return 1;
  72     if (test__fixunsdfti(-1.99, 0))
  73         return 1;
  74     if (test__fixunsdfti(-2.0, 0))
  75         return 1;
  76     if (test__fixunsdfti(-2.01, 0))
  77         return 1;
  78 #endif
  79
  80     if (test__fixunsdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  81         return 1;
  82     if (test__fixunsdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  83         return 1;
  84
  85 #if !TARGET_LIBGCC
  86     if (test__fixunsdfti(-0x1.FFFFFEp+62, 0))
  87         return 1;
  88     if (test__fixunsdfti(-0x1.FFFFFCp+62, 0))
  89         return 1;
  90 #endif
  91
  92     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800ULL))
  93         return 1;
  94     if (test__fixunsdfti(0x1.0000000000000p+63, 0x8000000000000000ULL))
  95         return 1;
  96     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00ULL))
  97         return 1;
  98     if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800ULL))
  99         return 1;
 100
 101     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+127, make_ti(0xFFFFFFFFFFFFF800ULL, 0)))
 102         return 1;
 103     if (test__fixunsdfti(0x1.0000000000000p+127, make_ti(0x8000000000000000ULL, 0)))
 104         return 1;
 105     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00ULL, 0)))
 106         return 1;
 107     if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800ULL, 0)))
 108         return 1;
 109     if (test__fixunsdfti(0x1.0000000000000p+128, make_ti(0xFFFFFFFFFFFFFFFFULL,
 110                                                          0xFFFFFFFFFFFFFFFFULL)))
 111         return 1;
 112
 113 #if !TARGET_LIBGCC
 114     if (test__fixunsdfti(-0x1.FFFFFFFFFFFFFp+62, 0))
 115         return 1;
 116     if (test__fixunsdfti(-0x1.FFFFFFFFFFFFEp+62, 0))
 117         return 1;
 118 #endif
 119
 120 #endif
 121    return 0;
 122 }