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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsdfdi
   3 //===-- fixunsdfdi_test.c - Test __fixunsdfdi -----------------------------===//
   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 __fixunsdfdi for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18 // Returns: convert a to a unsigned long long, rounding toward zero.
  19 //          Negative values all become zero.
  20
  21 // Assumption: double is a IEEE 64 bit floating point type
  22 //             du_int is a 64 bit integral type
  23 //             value in double is representable in du_int or is negative
  24 //                 (no range checking performed)
  25
  26 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  27
  28 COMPILER_RT_ABI du_int __fixunsdfdi(double a);
  29
  30 int test__fixunsdfdi(double a, du_int expected)
  31 {
  32     du_int x = __fixunsdfdi(a);
  33     if (x != expected)
  34         printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected);
  35     return x != expected;
  36 }
  37
  38 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
  39 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  40 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  41
  42 int main()
  43 {
  44     if (test__fixunsdfdi(0.0, 0))
  45         return 1;
  46
  47     if (test__fixunsdfdi(0.5, 0))
  48         return 1;
  49     if (test__fixunsdfdi(0.99, 0))
  50         return 1;
  51     if (test__fixunsdfdi(1.0, 1))
  52         return 1;
  53     if (test__fixunsdfdi(1.5, 1))
  54         return 1;
  55     if (test__fixunsdfdi(1.99, 1))
  56         return 1;
  57     if (test__fixunsdfdi(2.0, 2))
  58         return 1;
  59     if (test__fixunsdfdi(2.01, 2))
  60         return 1;
  61     if (test__fixunsdfdi(-0.5, 0))
  62         return 1;
  63     if (test__fixunsdfdi(-0.99, 0))
  64         return 1;
  65 #if !TARGET_LIBGCC
  66     if (test__fixunsdfdi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  67         return 1;
  68     if (test__fixunsdfdi(-1.5, 0))
  69         return 1;
  70     if (test__fixunsdfdi(-1.99, 0))
  71         return 1;
  72     if (test__fixunsdfdi(-2.0, 0))
  73         return 1;
  74     if (test__fixunsdfdi(-2.01, 0))
  75         return 1;
  76 #endif
  77
  78     if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  79         return 1;
  80     if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  81         return 1;
  82
  83 #if !TARGET_LIBGCC
  84     if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0))
  85         return 1;
  86     if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0))
  87         return 1;
  88 #endif
  89
  90     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
  91         return 1;
  92     if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL))
  93         return 1;
  94     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
  95         return 1;
  96     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
  97         return 1;
  98
  99 #if !TARGET_LIBGCC
 100     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
 101         return 1;
 102     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
 103         return 1;
 104 #endif
 105
 106    return 0;
 107 }