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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsxfdi
   3 //===-- fixunsxfdi_test.c - Test __fixunsxfdi -----------------------------===//
   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 __fixunsxfdi for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17 #include <limits.h>
  18
  19
  20 #if HAS_80_BIT_LONG_DOUBLE
  21 // Returns: convert a to a unsigned long long, rounding toward zero.
  22 //          Negative values all become zero.
  23
  24 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  25 //             du_int is a 64 bit integral type
  26 //             value in long double is representable in du_int or is negative
  27 //                 (no range checking performed)
  28
  29 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  30 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  31
  32 COMPILER_RT_ABI du_int __fixunsxfdi(long double a);
  33
  34 int test__fixunsxfdi(long double a, du_int expected)
  35 {
  36     du_int x = __fixunsxfdi(a);
  37     if (x != expected)
  38         printf("error in __fixunsxfdi(%LA) = %llX, expected %llX\n",
  39                a, x, expected);
  40     return x != expected;
  41 }
  42
  43 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
  44 char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
  45 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  46 #endif
  47
  48 int main()
  49 {
  50 #if HAS_80_BIT_LONG_DOUBLE
  51     if (test__fixunsxfdi(0.0, 0))
  52         return 1;
  53
  54     if (test__fixunsxfdi(0.5, 0))
  55         return 1;
  56     if (test__fixunsxfdi(0.99, 0))
  57         return 1;
  58     if (test__fixunsxfdi(1.0, 1))
  59         return 1;
  60     if (test__fixunsxfdi(1.5, 1))
  61         return 1;
  62     if (test__fixunsxfdi(1.99, 1))
  63         return 1;
  64     if (test__fixunsxfdi(2.0, 2))
  65         return 1;
  66     if (test__fixunsxfdi(2.01, 2))
  67         return 1;
  68     if (test__fixunsxfdi(-0.5, 0))
  69         return 1;
  70     if (test__fixunsxfdi(-0.99, 0))
  71         return 1;
  72     if (test__fixunsxfdi(-1.0, 0))
  73         return 1;
  74     if (test__fixunsxfdi(-1.5, 0))
  75         return 1;
  76     if (test__fixunsxfdi(-1.99, 0))
  77         return 1;
  78     if (test__fixunsxfdi(-2.0, 0))
  79         return 1;
  80     if (test__fixunsxfdi(-2.01, 0))
  81         return 1;
  82
  83     if (test__fixunsxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  84         return 1;
  85     if (test__fixunsxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  86         return 1;
  87
  88     if (test__fixunsxfdi(-0x1.FFFFFEp+62, 0))
  89         return 1;
  90     if (test__fixunsxfdi(-0x1.FFFFFCp+62, 0))
  91         return 1;
  92
  93     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  94         return 1;
  95     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  96         return 1;
  97
  98     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
  99         return 1;
 100     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
 101         return 1;
 102
 103     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFFEp+63L, 0xFFFFFFFFFFFFFFFFLL))
 104         return 1;
 105     if (test__fixunsxfdi(0x1.0000000000000002p+63L, 0x8000000000000001LL))
 106         return 1;
 107     if (test__fixunsxfdi(0x1.0000000000000000p+63L, 0x8000000000000000LL))
 108         return 1;
 109     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
 110         return 1;
 111     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
 112         return 1;
 113
 114     if (test__fixunsxfdi(-0x1.0000000000000000p+63L, 0))
 115         return 1;
 116     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0))
 117         return 1;
 118     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0))
 119         return 1;
 120
 121 #else
 122     printf("skipped\n");
 123 #endif
 124    return 0;
 125 }