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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatundidf
   3 //===-- floatundidf_test.c - Test __floatundidf ---------------------------===//
   4 //
   5 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   6 // See https://llvm.org/LICENSE.txt for license information.
   7 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   8 //
   9 //===----------------------------------------------------------------------===//
  10 //
  11 // This file tests __floatundidf for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <float.h>
  17 #include <stdio.h>
  18
  19 // Returns: convert a to a double, rounding toward even.
  20
  21 // Assumption: double is a IEEE 64 bit floating point type
  22 //             du_int is a 64 bit integral type
  23
  24 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  25
  26 COMPILER_RT_ABI double __floatundidf(du_int a);
  27
  28 int test__floatundidf(di_int a, double expected)
  29 {
  30     double x = __floatundidf(a);
  31     if (x != expected)
  32         printf("error in __floatundidf(%llX) = %a, expected %a\n",
  33                a, x, expected);
  34     return x != expected;
  35 }
  36
  37 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  38 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
  39 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  40
  41 int main()
  42 {
  43     if (test__floatundidf(0, 0.0))
  44         return 1;
  45
  46     if (test__floatundidf(1, 1.0))
  47         return 1;
  48     if (test__floatundidf(2, 2.0))
  49         return 1;
  50     if (test__floatundidf(20, 20.0))
  51         return 1;
  52
  53     if (test__floatundidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
  54         return 1;
  55     if (test__floatundidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
  56         return 1;
  57     if (test__floatundidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
  58         return 1;
  59     if (test__floatundidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
  60         return 1;
  61
  62     if (test__floatundidf(0x8000008000000000LL, 0x1.000001p+63))
  63         return 1;
  64     if (test__floatundidf(0x8000000000000800LL, 0x1.0000000000001p+63))
  65         return 1;
  66     if (test__floatundidf(0x8000010000000000LL, 0x1.000002p+63))
  67         return 1;
  68     if (test__floatundidf(0x8000000000001000LL, 0x1.0000000000002p+63))
  69         return 1;
  70
  71     if (test__floatundidf(0x8000000000000000LL, 0x1p+63))
  72         return 1;
  73     if (test__floatundidf(0x8000000000000001LL, 0x1p+63))
  74         return 1;
  75
  76     if (test__floatundidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
  77         return 1;
  78
  79     if (test__floatundidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
  80         return 1;
  81     if (test__floatundidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
  82         return 1;
  83     if (test__floatundidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
  84         return 1;
  85     if (test__floatundidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
  86         return 1;
  87     if (test__floatundidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
  88         return 1;
  89
  90     if (test__floatundidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
  91         return 1;
  92     if (test__floatundidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
  93         return 1;
  94     if (test__floatundidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
  95         return 1;
  96     if (test__floatundidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
  97         return 1;
  98     if (test__floatundidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
  99         return 1;
 100
 101     if (test__floatundidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
 102         return 1;
 103     if (test__floatundidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
 104         return 1;
 105     if (test__floatundidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
 106         return 1;
 107     if (test__floatundidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
 108         return 1;
 109     if (test__floatundidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
 110         return 1;
 111     if (test__floatundidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
 112         return 1;
 113     if (test__floatundidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
 114         return 1;
 115     if (test__floatundidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
 116         return 1;
 117     if (test__floatundidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
 118         return 1;
 119     if (test__floatundidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
 120         return 1;
 121     if (test__floatundidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
 122         return 1;
 123     if (test__floatundidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
 124         return 1;
 125     if (test__floatundidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
 126         return 1;
 127     if (test__floatundidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
 128         return 1;
 129     if (test__floatundidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
 130         return 1;
 131
 132    return 0;
 133 }