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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatuntidf
   3 // REQUIRES: int128
   4 //===-- floatuntidf.c - Test __floatuntidf --------------------------------===//
   5 //
   6 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   7 // See https://llvm.org/LICENSE.txt for license information.
   8 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   9 //
  10 //===----------------------------------------------------------------------===//
  11 //
  12 // This file tests __floatuntidf for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "int_lib.h"
  17 #include <float.h>
  18 #include <stdio.h>
  19
  20 #ifdef CRT_HAS_128BIT
  21
  22 // Returns: convert a to a double, rounding toward even.
  23
  24 // Assumption: double is a IEEE 64 bit floating point type
  25 //             tu_int is a 64 bit integral type
  26
  27 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  28
  29 COMPILER_RT_ABI double __floatuntidf(tu_int a);
  30
  31 int test__floatuntidf(tu_int a, double expected)
  32 {
  33     double x = __floatuntidf(a);
  34     if (x != expected)
  35     {
  36         utwords at;
  37         at.all = a;
  38         printf("error in __floatuntidf(0x%.16llX%.16llX) = %a, expected %a\n",
  39                at.s.high, at.s.low, x, expected);
  40     }
  41     return x != expected;
  42 }
  43
  44 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  45 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
  46 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  47
  48 #endif
  49
  50 int main()
  51 {
  52 #ifdef CRT_HAS_128BIT
  53     if (test__floatuntidf(0, 0.0))
  54         return 1;
  55
  56     if (test__floatuntidf(1, 1.0))
  57         return 1;
  58     if (test__floatuntidf(2, 2.0))
  59         return 1;
  60     if (test__floatuntidf(20, 20.0))
  61         return 1;
  62
  63     if (test__floatuntidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
  64         return 1;
  65     if (test__floatuntidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
  66         return 1;
  67     if (test__floatuntidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
  68         return 1;
  69     if (test__floatuntidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
  70         return 1;
  71
  72     if (test__floatuntidf(make_ti(0x8000008000000000LL, 0), 0x1.000001p+127))
  73         return 1;
  74     if (test__floatuntidf(make_ti(0x8000000000000800LL, 0), 0x1.0000000000001p+127))
  75         return 1;
  76     if (test__floatuntidf(make_ti(0x8000010000000000LL, 0), 0x1.000002p+127))
  77         return 1;
  78     if (test__floatuntidf(make_ti(0x8000000000001000LL, 0), 0x1.0000000000002p+127))
  79         return 1;
  80
  81     if (test__floatuntidf(make_ti(0x8000000000000000LL, 0), 0x1.000000p+127))
  82         return 1;
  83     if (test__floatuntidf(make_ti(0x8000000000000001LL, 0), 0x1.0000000000000002p+127))
  84         return 1;
  85
  86     if (test__floatuntidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
  87         return 1;
  88
  89     if (test__floatuntidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
  90         return 1;
  91     if (test__floatuntidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
  92         return 1;
  93     if (test__floatuntidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
  94         return 1;
  95     if (test__floatuntidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
  96         return 1;
  97     if (test__floatuntidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
  98         return 1;
  99
 100     if (test__floatuntidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
 101         return 1;
 102     if (test__floatuntidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
 103         return 1;
 104     if (test__floatuntidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
 105         return 1;
 106     if (test__floatuntidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
 107         return 1;
 108     if (test__floatuntidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
 109         return 1;
 110
 111     if (test__floatuntidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
 112         return 1;
 113     if (test__floatuntidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
 114         return 1;
 115     if (test__floatuntidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
 116         return 1;
 117     if (test__floatuntidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
 118         return 1;
 119     if (test__floatuntidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
 120         return 1;
 121     if (test__floatuntidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
 122         return 1;
 123     if (test__floatuntidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
 124         return 1;
 125     if (test__floatuntidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
 126         return 1;
 127     if (test__floatuntidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
 128         return 1;
 129     if (test__floatuntidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
 130         return 1;
 131     if (test__floatuntidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
 132         return 1;
 133     if (test__floatuntidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
 134         return 1;
 135     if (test__floatuntidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
 136         return 1;
 137     if (test__floatuntidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
 138         return 1;
 139     if (test__floatuntidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
 140         return 1;
 141
 142     if (test__floatuntidf(make_ti(0x023479FD0E092DC0LL, 0), 0x1.1A3CFE870496Ep+121))
 143         return 1;
 144     if (test__floatuntidf(make_ti(0x023479FD0E092DA1LL, 1), 0x1.1A3CFE870496Dp+121))
 145         return 1;
 146     if (test__floatuntidf(make_ti(0x023479FD0E092DB0LL, 2), 0x1.1A3CFE870496Ep+121))
 147         return 1;
 148     if (test__floatuntidf(make_ti(0x023479FD0E092DB8LL, 3), 0x1.1A3CFE870496Ep+121))
 149         return 1;
 150     if (test__floatuntidf(make_ti(0x023479FD0E092DB6LL, 4), 0x1.1A3CFE870496Ep+121))
 151         return 1;
 152     if (test__floatuntidf(make_ti(0x023479FD0E092DBFLL, 5), 0x1.1A3CFE870496Ep+121))
 153         return 1;
 154     if (test__floatuntidf(make_ti(0x023479FD0E092DC1LL, 6), 0x1.1A3CFE870496Ep+121))
 155         return 1;
 156     if (test__floatuntidf(make_ti(0x023479FD0E092DC7LL, 7), 0x1.1A3CFE870496Ep+121))
 157         return 1;
 158     if (test__floatuntidf(make_ti(0x023479FD0E092DC8LL, 8), 0x1.1A3CFE870496Ep+121))
 159         return 1;
 160     if (test__floatuntidf(make_ti(0x023479FD0E092DCFLL, 9), 0x1.1A3CFE870496Ep+121))
 161         return 1;
 162     if (test__floatuntidf(make_ti(0x023479FD0E092DD0LL, 0), 0x1.1A3CFE870496Ep+121))
 163         return 1;
 164     if (test__floatuntidf(make_ti(0x023479FD0E092DD1LL, 11), 0x1.1A3CFE870496Fp+121))
 165         return 1;
 166     if (test__floatuntidf(make_ti(0x023479FD0E092DD8LL, 12), 0x1.1A3CFE870496Fp+121))
 167         return 1;
 168     if (test__floatuntidf(make_ti(0x023479FD0E092DDFLL, 13), 0x1.1A3CFE870496Fp+121))
 169         return 1;
 170     if (test__floatuntidf(make_ti(0x023479FD0E092DE0LL, 14), 0x1.1A3CFE870496Fp+121))
 171         return 1;
 172 #else
 173     printf("skipped\n");
 174 #endif
 175    return 0;
 176 }