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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixxfdi
   3 //===-- fixxfdi_test.c - Test __fixxfdi -----------------------------------===//
   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 __fixxfdi for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18
  19 #if HAS_80_BIT_LONG_DOUBLE
  20 // Returns: convert a to a signed long long, rounding toward zero.
  21
  22 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  23 //             su_int is a 32 bit integral type
  24 //             value in long double is representable in di_int (no range checking performed)
  25
  26 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  27 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  28
  29 COMPILER_RT_ABI di_int __fixxfdi(long double a);
  30
  31 int test__fixxfdi(long double a, di_int expected)
  32 {
  33     di_int x = __fixxfdi(a);
  34     if (x != expected)
  35         printf("error in __fixxfdi(%LA) = %llX, expected %llX\n",
  36                a, x, expected);
  37     return x != expected;
  38 }
  39
  40 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  41 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  42 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  43 #endif
  44
  45 int main()
  46 {
  47 #if HAS_80_BIT_LONG_DOUBLE
  48     if (test__fixxfdi(0.0, 0))
  49         return 1;
  50
  51     if (test__fixxfdi(0.5, 0))
  52         return 1;
  53     if (test__fixxfdi(0.99, 0))
  54         return 1;
  55     if (test__fixxfdi(1.0, 1))
  56         return 1;
  57     if (test__fixxfdi(1.5, 1))
  58         return 1;
  59     if (test__fixxfdi(1.99, 1))
  60         return 1;
  61     if (test__fixxfdi(2.0, 2))
  62         return 1;
  63     if (test__fixxfdi(2.01, 2))
  64         return 1;
  65     if (test__fixxfdi(-0.5, 0))
  66         return 1;
  67     if (test__fixxfdi(-0.99, 0))
  68         return 1;
  69     if (test__fixxfdi(-1.0, -1))
  70         return 1;
  71     if (test__fixxfdi(-1.5, -1))
  72         return 1;
  73     if (test__fixxfdi(-1.99, -1))
  74         return 1;
  75     if (test__fixxfdi(-2.0, -2))
  76         return 1;
  77     if (test__fixxfdi(-2.01, -2))
  78         return 1;
  79
  80     if (test__fixxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  81         return 1;
  82     if (test__fixxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  83         return 1;
  84
  85     if (test__fixxfdi(-0x1.FFFFFEp+62, 0x8000008000000000LL))
  86         return 1;
  87     if (test__fixxfdi(-0x1.FFFFFCp+62, 0x8000010000000000LL))
  88         return 1;
  89
  90     if (test__fixxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  91         return 1;
  92     if (test__fixxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  93         return 1;
  94
  95     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFp+62, 0x8000000000000400LL))
  96         return 1;
  97     if (test__fixxfdi(-0x1.FFFFFFFFFFFFEp+62, 0x8000000000000800LL))
  98         return 1;
  99
 100     if (test__fixxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
 101         return 1;
 102     if (test__fixxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
 103         return 1;
 104
 105     if (test__fixxfdi(-0x1.0000000000000000p+63L, 0x8000000000000000LL))
 106         return 1;
 107     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0x8000000000000001LL))
 108         return 1;
 109     if (test__fixxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0x8000000000000002LL))
 110         return 1;
 111
 112 #else
 113     printf("skipped\n");
 114 #endif
 115    return 0;
 116 }