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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatdidf
   3 //===-- floatdidf.c - Test __floatdidf ------------------------------------===//
   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 __floatdidf 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 //             di_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 __floatdidf(di_int a);
  27
  28 int test__floatdidf(di_int a, double expected)
  29 {
  30     double x = __floatdidf(a);
  31     if (x != expected)
  32         printf("error in __floatdidf(%llX) = %a, expected %a\n", a, x, expected);
  33     return x != expected;
  34 }
  35
  36 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  37 char assumption_2[sizeof(di_int)*CHAR_BIT == 64] = {0};
  38 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  39
  40 int main()
  41 {
  42     if (test__floatdidf(0, 0.0))
  43         return 1;
  44
  45     if (test__floatdidf(1, 1.0))
  46         return 1;
  47     if (test__floatdidf(2, 2.0))
  48         return 1;
  49     if (test__floatdidf(20, 20.0))
  50         return 1;
  51     if (test__floatdidf(-1, -1.0))
  52         return 1;
  53     if (test__floatdidf(-2, -2.0))
  54         return 1;
  55     if (test__floatdidf(-20, -20.0))
  56         return 1;
  57
  58     if (test__floatdidf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62))
  59         return 1;
  60     if (test__floatdidf(0x7FFFFFFFFFFFF800LL, 0x1.FFFFFFFFFFFFEp+62))
  61         return 1;
  62     if (test__floatdidf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62))
  63         return 1;
  64     if (test__floatdidf(0x7FFFFFFFFFFFF000LL, 0x1.FFFFFFFFFFFFCp+62))
  65         return 1;
  66
  67     if (test__floatdidf(0x8000008000000000LL, -0x1.FFFFFEp+62))
  68         return 1;
  69     if (test__floatdidf(0x8000000000000800LL, -0x1.FFFFFFFFFFFFEp+62))
  70         return 1;
  71     if (test__floatdidf(0x8000010000000000LL, -0x1.FFFFFCp+62))
  72         return 1;
  73     if (test__floatdidf(0x8000000000001000LL, -0x1.FFFFFFFFFFFFCp+62))
  74         return 1;
  75
  76     if (test__floatdidf(0x8000000000000000LL, -0x1.000000p+63))
  77         return 1;
  78     if (test__floatdidf(0x8000000000000001LL, -0x1.000000p+63))
  79         return 1;
  80
  81     if (test__floatdidf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50))
  82         return 1;
  83
  84     if (test__floatdidf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50))
  85         return 1;
  86     if (test__floatdidf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50))
  87         return 1;
  88     if (test__floatdidf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAFFFFFFCp+50))
  89         return 1;
  90     if (test__floatdidf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50))
  91         return 1;
  92     if (test__floatdidf(0x0007FB72E8000001LL, 0x1.FEDCBA0000004p+50))
  93         return 1;
  94
  95     if (test__floatdidf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50))
  96         return 1;
  97     if (test__floatdidf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50))
  98         return 1;
  99     if (test__floatdidf(0x0007FB72E7FFFFFFLL, 0x1.FEDCB9FFFFFFCp+50))
 100         return 1;
 101     if (test__floatdidf(0x0007FB72E4000001LL, 0x1.FEDCB90000004p+50))
 102         return 1;
 103     if (test__floatdidf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50))
 104         return 1;
 105
 106     if (test__floatdidf(0x023479FD0E092DC0LL, 0x1.1A3CFE870496Ep+57))
 107         return 1;
 108     if (test__floatdidf(0x023479FD0E092DA1LL, 0x1.1A3CFE870496Dp+57))
 109         return 1;
 110     if (test__floatdidf(0x023479FD0E092DB0LL, 0x1.1A3CFE870496Ep+57))
 111         return 1;
 112     if (test__floatdidf(0x023479FD0E092DB8LL, 0x1.1A3CFE870496Ep+57))
 113         return 1;
 114     if (test__floatdidf(0x023479FD0E092DB6LL, 0x1.1A3CFE870496Ep+57))
 115         return 1;
 116     if (test__floatdidf(0x023479FD0E092DBFLL, 0x1.1A3CFE870496Ep+57))
 117         return 1;
 118     if (test__floatdidf(0x023479FD0E092DC1LL, 0x1.1A3CFE870496Ep+57))
 119         return 1;
 120     if (test__floatdidf(0x023479FD0E092DC7LL, 0x1.1A3CFE870496Ep+57))
 121         return 1;
 122     if (test__floatdidf(0x023479FD0E092DC8LL, 0x1.1A3CFE870496Ep+57))
 123         return 1;
 124     if (test__floatdidf(0x023479FD0E092DCFLL, 0x1.1A3CFE870496Ep+57))
 125         return 1;
 126     if (test__floatdidf(0x023479FD0E092DD0LL, 0x1.1A3CFE870496Ep+57))
 127         return 1;
 128     if (test__floatdidf(0x023479FD0E092DD1LL, 0x1.1A3CFE870496Fp+57))
 129         return 1;
 130     if (test__floatdidf(0x023479FD0E092DD8LL, 0x1.1A3CFE870496Fp+57))
 131         return 1;
 132     if (test__floatdidf(0x023479FD0E092DDFLL, 0x1.1A3CFE870496Fp+57))
 133         return 1;
 134     if (test__floatdidf(0x023479FD0E092DE0LL, 0x1.1A3CFE870496Fp+57))
 135         return 1;
 136
 137    return 0;
 138 }