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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixsfdi
   3 //===-- fixsfdi_test.c - Test __fixsfdi -----------------------------------===//
   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 __fixsfdi for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <stdio.h>
  17
  18 // Returns: convert a to a signed long long, rounding toward zero.
  19
  20 // Assumption: float is a IEEE 32 bit floating point type
  21 //             su_int is a 32 bit integral type
  22 //             value in float is representable in di_int (no range checking performed)
  23
  24 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  25
  26 COMPILER_RT_ABI di_int __fixsfdi(float a);
  27
  28 int test__fixsfdi(float a, di_int expected)
  29 {
  30     di_int x = __fixsfdi(a);
  31     if (x != expected)
  32         printf("error in __fixsfdi(%A) = %llX, expected %llX\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(su_int)*CHAR_BIT == 32] = {0};
  38 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  39
  40 int main()
  41 {
  42     if (test__fixsfdi(0.0F, 0))
  43         return 1;
  44
  45     if (test__fixsfdi(0.5F, 0))
  46         return 1;
  47     if (test__fixsfdi(0.99F, 0))
  48         return 1;
  49     if (test__fixsfdi(1.0F, 1))
  50         return 1;
  51     if (test__fixsfdi(1.5F, 1))
  52         return 1;
  53     if (test__fixsfdi(1.99F, 1))
  54         return 1;
  55     if (test__fixsfdi(2.0F, 2))
  56         return 1;
  57     if (test__fixsfdi(2.01F, 2))
  58         return 1;
  59     if (test__fixsfdi(-0.5F, 0))
  60         return 1;
  61     if (test__fixsfdi(-0.99F, 0))
  62         return 1;
  63     if (test__fixsfdi(-1.0F, -1))
  64         return 1;
  65     if (test__fixsfdi(-1.5F, -1))
  66         return 1;
  67     if (test__fixsfdi(-1.99F, -1))
  68         return 1;
  69     if (test__fixsfdi(-2.0F, -2))
  70         return 1;
  71     if (test__fixsfdi(-2.01F, -2))
  72         return 1;
  73
  74     if (test__fixsfdi(0x1.FFFFFEp+62F, 0x7FFFFF8000000000LL))
  75         return 1;
  76     if (test__fixsfdi(0x1.FFFFFCp+62F, 0x7FFFFF0000000000LL))
  77         return 1;
  78
  79     if (test__fixsfdi(-0x1.FFFFFEp+62F, 0x8000008000000000LL))
  80         return 1;
  81     if (test__fixsfdi(-0x1.FFFFFCp+62F, 0x8000010000000000LL))
  82         return 1;
  83
  84    return 0;
  85 }