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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsdfdi
   3
   4 #include "int_lib.h"
   5 #include <stdio.h>
   6
   7 // Returns: convert a to a unsigned long long, rounding toward zero.
   8 //          Negative values all become zero.
   9
  10 // Assumption: double is a IEEE 64 bit floating point type
  11 //             du_int is a 64 bit integral type
  12 //             value in double is representable in du_int or is negative
  13 //                 (no range checking performed)
  14
  15 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  16
  17 COMPILER_RT_ABI du_int __fixunsdfdi(double a);
  18
  19 int test__fixunsdfdi(double a, du_int expected)
  20 {
  21     du_int x = __fixunsdfdi(a);
  22     if (x != expected)
  23         printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected);
  24     return x != expected;
  25 }
  26
  27 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
  28 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  29 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  30
  31 int main()
  32 {
  33     if (test__fixunsdfdi(0.0, 0))
  34         return 1;
  35
  36     if (test__fixunsdfdi(0.5, 0))
  37         return 1;
  38     if (test__fixunsdfdi(0.99, 0))
  39         return 1;
  40     if (test__fixunsdfdi(1.0, 1))
  41         return 1;
  42     if (test__fixunsdfdi(1.5, 1))
  43         return 1;
  44     if (test__fixunsdfdi(1.99, 1))
  45         return 1;
  46     if (test__fixunsdfdi(2.0, 2))
  47         return 1;
  48     if (test__fixunsdfdi(2.01, 2))
  49         return 1;
  50     if (test__fixunsdfdi(-0.5, 0))
  51         return 1;
  52     if (test__fixunsdfdi(-0.99, 0))
  53         return 1;
  54 #if !TARGET_LIBGCC
  55     if (test__fixunsdfdi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  56         return 1;
  57     if (test__fixunsdfdi(-1.5, 0))
  58         return 1;
  59     if (test__fixunsdfdi(-1.99, 0))
  60         return 1;
  61     if (test__fixunsdfdi(-2.0, 0))
  62         return 1;
  63     if (test__fixunsdfdi(-2.01, 0))
  64         return 1;
  65 #endif
  66
  67     if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  68         return 1;
  69     if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  70         return 1;
  71
  72 #if !TARGET_LIBGCC
  73     if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0))
  74         return 1;
  75     if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0))
  76         return 1;
  77 #endif
  78
  79     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
  80         return 1;
  81     if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL))
  82         return 1;
  83     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  84         return 1;
  85     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  86         return 1;
  87
  88 #if !TARGET_LIBGCC
  89     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
  90         return 1;
  91     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
  92         return 1;
  93 #endif
  94
  95    return 0;
  96 }