src/llvm/projects/compiler-rt/test/Unit/fixunsxfdi_test.c

   1 //===-- fixunsxfdi_test.c - Test __fixunsxfdi -----------------------------===//
   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 __fixunsxfdi for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16 #include <limits.h>
  17
  18
  19 #if HAS_80_BIT_LONG_DOUBLE
  20 // Returns: convert a to a unsigned long long, rounding toward zero.
  21 //          Negative values all become zero.
  22
  23 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  24 //             du_int is a 64 bit integral type
  25 //             value in long double is representable in du_int or is negative
  26 //                 (no range checking performed)
  27
  28 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  29 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  30
  31 du_int __fixunsxfdi(long double a);
  32
  33 int test__fixunsxfdi(long double a, du_int expected)
  34 {
  35     du_int x = __fixunsxfdi(a);
  36     if (x != expected)
  37         printf("error in __fixunsxfdi(%LA) = %llX, expected %llX\n",
  38                a, x, expected);
  39     return x != expected;
  40 }
  41
  42 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
  43 char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
  44 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  45 #endif
  46
  47 int main()
  48 {
  49 #if HAS_80_BIT_LONG_DOUBLE
  50     if (test__fixunsxfdi(0.0, 0))
  51         return 1;
  52
  53     if (test__fixunsxfdi(0.5, 0))
  54         return 1;
  55     if (test__fixunsxfdi(0.99, 0))
  56         return 1;
  57     if (test__fixunsxfdi(1.0, 1))
  58         return 1;
  59     if (test__fixunsxfdi(1.5, 1))
  60         return 1;
  61     if (test__fixunsxfdi(1.99, 1))
  62         return 1;
  63     if (test__fixunsxfdi(2.0, 2))
  64         return 1;
  65     if (test__fixunsxfdi(2.01, 2))
  66         return 1;
  67     if (test__fixunsxfdi(-0.5, 0))
  68         return 1;
  69     if (test__fixunsxfdi(-0.99, 0))
  70         return 1;
  71     if (test__fixunsxfdi(-1.0, 0))
  72         return 1;
  73     if (test__fixunsxfdi(-1.5, 0))
  74         return 1;
  75     if (test__fixunsxfdi(-1.99, 0))
  76         return 1;
  77     if (test__fixunsxfdi(-2.0, 0))
  78         return 1;
  79     if (test__fixunsxfdi(-2.01, 0))
  80         return 1;
  81
  82     if (test__fixunsxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  83         return 1;
  84     if (test__fixunsxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  85         return 1;
  86
  87     if (test__fixunsxfdi(-0x1.FFFFFEp+62, 0))
  88         return 1;
  89     if (test__fixunsxfdi(-0x1.FFFFFCp+62, 0))
  90         return 1;
  91
  92     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  93         return 1;
  94     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  95         return 1;
  96
  97     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
  98         return 1;
  99     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
 100         return 1;
 101
 102     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFFEp+63L, 0xFFFFFFFFFFFFFFFFLL))
 103         return 1;
 104     if (test__fixunsxfdi(0x1.0000000000000002p+63L, 0x8000000000000001LL))
 105         return 1;
 106     if (test__fixunsxfdi(0x1.0000000000000000p+63L, 0x8000000000000000LL))
 107         return 1;
 108     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
 109         return 1;
 110     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
 111         return 1;
 112
 113     if (test__fixunsxfdi(-0x1.0000000000000000p+63L, 0))
 114         return 1;
 115     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0))
 116         return 1;
 117     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0))
 118         return 1;
 119
 120 #else
 121     printf("skipped\n");
 122 #endif
 123    return 0;
 124 }