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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsdfti
   3 // REQUIRES: int128
   4 //===-- fixunsdfti_test.c - Test __fixunsdfti -----------------------------===//
   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 __fixunsdfti for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "int_lib.h"
  17 #include <stdio.h>
  18
  19 // Returns: convert a to a unsigned long long, rounding toward zero.
  20 //          Negative values all become zero.
  21
  22 // Assumption: double is a IEEE 64 bit floating point type
  23 //             tu_int is a 64 bit integral type
  24 //             value in double is representable in tu_int or is negative
  25 //                 (no range checking performed)
  26
  27 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  28
  29 #ifdef CRT_HAS_128BIT
  30
  31 COMPILER_RT_ABI tu_int __fixunsdfti(double a);
  32
  33 int test__fixunsdfti(double a, tu_int expected)
  34 {
  35     tu_int x = __fixunsdfti(a);
  36     if (x != expected)
  37     {
  38         utwords xt;
  39         xt.all = x;
  40         utwords expectedt;
  41         expectedt.all = expected;
  42         printf("error in __fixunsdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  43                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  44     }
  45     return x != expected;
  46 }
  47
  48 char assumption_1[sizeof(tu_int) == 2*sizeof(du_int)] = {0};
  49 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  50 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  51
  52 #endif
  53
  54 int main()
  55 {
  56 #ifdef CRT_HAS_128BIT
  57     if (test__fixunsdfti(0.0, 0))
  58         return 1;
  59
  60     if (test__fixunsdfti(0.5, 0))
  61         return 1;
  62     if (test__fixunsdfti(0.99, 0))
  63         return 1;
  64     if (test__fixunsdfti(1.0, 1))
  65         return 1;
  66     if (test__fixunsdfti(1.5, 1))
  67         return 1;
  68     if (test__fixunsdfti(1.99, 1))
  69         return 1;
  70     if (test__fixunsdfti(2.0, 2))
  71         return 1;
  72     if (test__fixunsdfti(2.01, 2))
  73         return 1;
  74     if (test__fixunsdfti(-0.5, 0))
  75         return 1;
  76     if (test__fixunsdfti(-0.99, 0))
  77         return 1;
  78 #if !TARGET_LIBGCC
  79     if (test__fixunsdfti(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  80         return 1;
  81     if (test__fixunsdfti(-1.5, 0))
  82         return 1;
  83     if (test__fixunsdfti(-1.99, 0))
  84         return 1;
  85     if (test__fixunsdfti(-2.0, 0))
  86         return 1;
  87     if (test__fixunsdfti(-2.01, 0))
  88         return 1;
  89 #endif
  90
  91     if (test__fixunsdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  92         return 1;
  93     if (test__fixunsdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  94         return 1;
  95
  96 #if !TARGET_LIBGCC
  97     if (test__fixunsdfti(-0x1.FFFFFEp+62, 0))
  98         return 1;
  99     if (test__fixunsdfti(-0x1.FFFFFCp+62, 0))
 100         return 1;
 101 #endif
 102
 103     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800ULL))
 104         return 1;
 105     if (test__fixunsdfti(0x1.0000000000000p+63, 0x8000000000000000ULL))
 106         return 1;
 107     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00ULL))
 108         return 1;
 109     if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800ULL))
 110         return 1;
 111
 112     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+127, make_ti(0xFFFFFFFFFFFFF800ULL, 0)))
 113         return 1;
 114     if (test__fixunsdfti(0x1.0000000000000p+127, make_ti(0x8000000000000000ULL, 0)))
 115         return 1;
 116     if (test__fixunsdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00ULL, 0)))
 117         return 1;
 118     if (test__fixunsdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800ULL, 0)))
 119         return 1;
 120     if (test__fixunsdfti(0x1.0000000000000p+128, make_ti(0xFFFFFFFFFFFFFFFFULL,
 121                                                          0xFFFFFFFFFFFFFFFFULL)))
 122         return 1;
 123
 124 #if !TARGET_LIBGCC
 125     if (test__fixunsdfti(-0x1.FFFFFFFFFFFFFp+62, 0))
 126         return 1;
 127     if (test__fixunsdfti(-0x1.FFFFFFFFFFFFEp+62, 0))
 128         return 1;
 129 #endif
 130
 131 #endif
 132    return 0;
 133 }