src/libcompiler_builtins/compiler-rt/test/builtins/Unit/floatdixf_test.c

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 //===-- floatdixf_test.c - Test __floatdixf -------------------------------===//
   3 //
   4 //                     The LLVM Compiler Infrastructure
   5 //
   6 // This file is dual licensed under the MIT and the University of Illinois Open
   7 // Source Licenses. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10 //
  11 // This file tests __floatdixf for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18 #if HAS_80_BIT_LONG_DOUBLE
  19 // Returns: convert a to a long double, rounding toward even.
  20
  21 // Assumption: long double is a IEEE 80 bit floating point type padded to 128 bits
  22 //             di_int is a 64 bit integral type
  23
  24 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  25 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  26
  27 long COMPILER_RT_ABI double __floatdixf(di_int a);
  28
  29 int test__floatdixf(di_int a, long double expected)
  30 {
  31     long double x = __floatdixf(a);
  32     if (x != expected)
  33         printf("error in __floatdixf(%llX) = %LA, expected %LA\n",
  34                a, x, expected);
  35     return x != expected;
  36 }
  37
  38 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  39 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
  40 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  41 #endif
  42
  43 int main()
  44 {
  45 #if HAS_80_BIT_LONG_DOUBLE
  46     if (test__floatdixf(0, 0.0))
  47         return 1;
  48
  49     if (test__floatdixf(1, 1.0))
  50         return 1;
  51     if (test__floatdixf(2, 2.0))
  52         return 1;
  53     if (test__floatdixf(20, 20.0))
  54         return 1;
  55     if (test__floatdixf(-1, -1.0))
  56         return 1;
  57     if (test__floatdixf(-2, -2.0))
  58         return 1;
  59     if (test__floatdixf(-20, -20.0))
  60         return 1;
  61
  62     if (test__floatdixf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
  63         return 1;
  64     if (test__floatdixf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
  65         return 1;
  66     if (test__floatdixf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
  67         return 1;
  68     if (test__floatdixf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
  69         return 1;
  70
  71     if (test__floatdixf(0x8000008000000000LL, -0x1.FFFFFEp+62))
  72         return 1;
  73     if (test__floatdixf(0x8000000000000800LL, -0x1.FFFFFFFFFFFFEp+62))
  74         return 1;
  75     if (test__floatdixf(0x8000010000000000LL, -0x1.FFFFFCp+62))
  76         return 1;
  77     if (test__floatdixf(0x8000000000001000LL, -0x1.FFFFFFFFFFFFCp+62))
  78         return 1;
  79
  80     if (test__floatdixf(0x8000000000000000LL, -0x1.000000p+63))
  81         return 1;
  82     if (test__floatdixf(0x8000000000000001LL, -0x1.FFFFFFFFFFFFFFFCp+62L))
  83         return 1;
  84
  85     if (test__floatdixf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
  86         return 1;
  87
  88     if (test__floatdixf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
  89         return 1;
  90     if (test__floatdixf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
  91         return 1;
  92     if (test__floatdixf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
  93         return 1;
  94     if (test__floatdixf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
  95         return 1;
  96     if (test__floatdixf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
  97         return 1;
  98
  99     if (test__floatdixf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
 100         return 1;
 101     if (test__floatdixf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
 102         return 1;
 103     if (test__floatdixf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
 104         return 1;
 105     if (test__floatdixf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
 106         return 1;
 107     if (test__floatdixf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
 108         return 1;
 109
 110     if (test__floatdixf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
 111         return 1;
 112     if (test__floatdixf(0x023479FD0E092DA1LL, 0x8.D1E7F43824B684p+54L))
 113         return 1;
 114     if (test__floatdixf(0x023479FD0E092DB0LL, 0x8.D1E7f43824B6Cp+54L))
 115         return 1;
 116     if (test__floatdixf(0x023479FD0E092DB8LL, 0x8.D1E7F43824B6Ep+54L))
 117         return 1;
 118     if (test__floatdixf(0x023479FD0E092DB6LL, 0x8.D1E7F43824B6D8p+54L))
 119         return 1;
 120     if (test__floatdixf(0x023479FD0E092DBFLL, 0x8.D1E7F43824B6FCp+54L))
 121         return 1;
 122     if (test__floatdixf(0x023479FD0E092DC1LL, 0x8.D1E7F43824B704p+54L))
 123         return 1;
 124     if (test__floatdixf(0x023479FD0E092DC7LL, 0x8.D1E7F43824B71Cp+54L))
 125         return 1;
 126     if (test__floatdixf(0x023479FD0E092DC8LL, 0x8.D1E7F43824B72p+54L))
 127         return 1;
 128     if (test__floatdixf(0x023479FD0E092DCFLL, 0x8.D1E7F43824B73Cp+54L))
 129         return 1;
 130     if (test__floatdixf(0x023479FD0E092DD0LL, 0x8.D1E7F43824B74p+54L))
 131         return 1;
 132     if (test__floatdixf(0x023479FD0E092DD1LL, 0x8.D1E7F43824B744p+54L))
 133         return 1;
 134     if (test__floatdixf(0x023479FD0E092DD8LL, 0x8.D1E7F43824B76p+54L))
 135         return 1;
 136     if (test__floatdixf(0x023479FD0E092DDFLL, 0x8.D1E7F43824B77Cp+54L))
 137         return 1;
 138     if (test__floatdixf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
 139         return 1;
 140
 141 #else
 142     printf("skipped\n");
 143 #endif
 144    return 0;
 145 }