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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixxfdi
   3
   4 #include "int_lib.h"
   5 #include <stdio.h>
   6
   7
   8 #if HAS_80_BIT_LONG_DOUBLE
   9 // Returns: convert a to a signed long long, rounding toward zero.
  10
  11 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  12 //             su_int is a 32 bit integral type
  13 //             value in long double is representable in di_int (no range checking performed)
  14
  15 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  16 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  17
  18 COMPILER_RT_ABI di_int __fixxfdi(long double a);
  19
  20 int test__fixxfdi(long double a, di_int expected)
  21 {
  22     di_int x = __fixxfdi(a);
  23     if (x != expected)
  24         printf("error in __fixxfdi(%LA) = %llX, expected %llX\n",
  25                a, x, expected);
  26     return x != expected;
  27 }
  28
  29 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  30 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  31 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  32 #endif
  33
  34 int main()
  35 {
  36 #if HAS_80_BIT_LONG_DOUBLE
  37     if (test__fixxfdi(0.0, 0))
  38         return 1;
  39
  40     if (test__fixxfdi(0.5, 0))
  41         return 1;
  42     if (test__fixxfdi(0.99, 0))
  43         return 1;
  44     if (test__fixxfdi(1.0, 1))
  45         return 1;
  46     if (test__fixxfdi(1.5, 1))
  47         return 1;
  48     if (test__fixxfdi(1.99, 1))
  49         return 1;
  50     if (test__fixxfdi(2.0, 2))
  51         return 1;
  52     if (test__fixxfdi(2.01, 2))
  53         return 1;
  54     if (test__fixxfdi(-0.5, 0))
  55         return 1;
  56     if (test__fixxfdi(-0.99, 0))
  57         return 1;
  58     if (test__fixxfdi(-1.0, -1))
  59         return 1;
  60     if (test__fixxfdi(-1.5, -1))
  61         return 1;
  62     if (test__fixxfdi(-1.99, -1))
  63         return 1;
  64     if (test__fixxfdi(-2.0, -2))
  65         return 1;
  66     if (test__fixxfdi(-2.01, -2))
  67         return 1;
  68
  69     if (test__fixxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  70         return 1;
  71     if (test__fixxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  72         return 1;
  73
  74     if (test__fixxfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL))
  75         return 1;
  76     if (test__fixxfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL))
  77         return 1;
  78
  79     if (test__fixxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  80         return 1;
  81     if (test__fixxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  82         return 1;
  83
  84     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL))
  85         return 1;
  86     if (test__fixxfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL))
  87         return 1;
  88
  89     if (test__fixxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
  90         return 1;
  91     if (test__fixxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
  92         return 1;
  93
  94     if (test__fixxfdi(-0x1.0000000000000000p+63L, 0x8000000000000000LL))
  95         return 1;
  96     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0x8000000000000001LL))
  97         return 1;
  98     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0x8000000000000002LL))
  99         return 1;
 100
 101 #else
 102     printf("skipped\n");
 103 #endif
 104    return 0;
 105 }