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

   1 //===-- fixxfdi_test.c - Test __fixxfdi -----------------------------------===//
   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 __fixxfdi for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17
  18 #if HAS_80_BIT_LONG_DOUBLE
  19 // Returns: convert a to a signed long long, rounding toward zero.
  20
  21 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  22 //             su_int is a 32 bit integral type
  23 //             value in long double is representable in di_int (no range checking performed)
  24
  25 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  26 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  27
  28 di_int __fixxfdi(long double a);
  29
  30 int test__fixxfdi(long double a, di_int expected)
  31 {
  32     di_int x = __fixxfdi(a);
  33     if (x != expected)
  34         printf("error in __fixxfdi(%LA) = %llX, expected %llX\n",
  35                a, x, expected);
  36     return x != expected;
  37 }
  38
  39 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  40 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  41 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  42 #endif
  43
  44 int main()
  45 {
  46 #if HAS_80_BIT_LONG_DOUBLE
  47     if (test__fixxfdi(0.0, 0))
  48         return 1;
  49
  50     if (test__fixxfdi(0.5, 0))
  51         return 1;
  52     if (test__fixxfdi(0.99, 0))
  53         return 1;
  54     if (test__fixxfdi(1.0, 1))
  55         return 1;
  56     if (test__fixxfdi(1.5, 1))
  57         return 1;
  58     if (test__fixxfdi(1.99, 1))
  59         return 1;
  60     if (test__fixxfdi(2.0, 2))
  61         return 1;
  62     if (test__fixxfdi(2.01, 2))
  63         return 1;
  64     if (test__fixxfdi(-0.5, 0))
  65         return 1;
  66     if (test__fixxfdi(-0.99, 0))
  67         return 1;
  68     if (test__fixxfdi(-1.0, -1))
  69         return 1;
  70     if (test__fixxfdi(-1.5, -1))
  71         return 1;
  72     if (test__fixxfdi(-1.99, -1))
  73         return 1;
  74     if (test__fixxfdi(-2.0, -2))
  75         return 1;
  76     if (test__fixxfdi(-2.01, -2))
  77         return 1;
  78
  79     if (test__fixxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  80         return 1;
  81     if (test__fixxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  82         return 1;
  83
  84     if (test__fixxfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL))
  85         return 1;
  86     if (test__fixxfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL))
  87         return 1;
  88
  89     if (test__fixxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  90         return 1;
  91     if (test__fixxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  92         return 1;
  93
  94     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL))
  95         return 1;
  96     if (test__fixxfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL))
  97         return 1;
  98
  99     if (test__fixxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
 100         return 1;
 101     if (test__fixxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
 102         return 1;
 103
 104     if (test__fixxfdi(-0x1.0000000000000000p+63L, 0x8000000000000000LL))
 105         return 1;
 106     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0x8000000000000001LL))
 107         return 1;
 108     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0x8000000000000002LL))
 109         return 1;
 110
 111 #else
 112     printf("skipped\n");
 113 #endif
 114    return 0;
 115 }