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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatundisf
   3 //===-- floatundisf_test.c - Test __floatundisf ---------------------------===//
   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 __floatundisf for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <float.h>
  17 #include <stdio.h>
  18
  19 // Returns: convert a to a float, rounding toward even.
  20
  21 // Assumption: float is a IEEE 32 bit floating point type
  22 //             du_int is a 64 bit integral type
  23
  24 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  25
  26 COMPILER_RT_ABI float __floatundisf(du_int a);
  27
  28 int test__floatundisf(du_int a, float expected)
  29 {
  30     float x = __floatundisf(a);
  31     if (x != expected)
  32         printf("error in __floatundisf(%llX) = %a, expected %a\n",
  33                a, x, expected);
  34     return x != expected;
  35 }
  36
  37 char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0};
  38 char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
  39 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  40
  41 int main()
  42 {
  43     if (test__floatundisf(0, 0.0F))
  44         return 1;
  45
  46     if (test__floatundisf(1, 1.0F))
  47         return 1;
  48     if (test__floatundisf(2, 2.0F))
  49         return 1;
  50
  51     if (test__floatundisf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62F))
  52         return 1;
  53     if (test__floatundisf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62F))
  54         return 1;
  55
  56     if (test__floatundisf(0x8000008000000000ULL, 0x1p+63F))
  57         return 1;
  58     if (test__floatundisf(0x8000010000000000LL, 0x1.000002p+63F))
  59         return 1;
  60
  61     if (test__floatundisf(0x8000000000000000LL, 0x1p+63F))
  62         return 1;
  63     if (test__floatundisf(0x8000000000000001LL, 0x1p+63F))
  64         return 1;
  65
  66     if (test__floatundisf(0xFFFFFFFFFFFFFFFELL, 0x1p+64F))
  67         return 1;
  68     if (test__floatundisf(0xFFFFFFFFFFFFFFFFLL, 0x1p+64F))
  69         return 1;
  70
  71     if (test__floatundisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
  72         return 1;
  73
  74     if (test__floatundisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
  75         return 1;
  76     if (test__floatundisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
  77         return 1;
  78     if (test__floatundisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
  79         return 1;
  80     if (test__floatundisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
  81         return 1;
  82     if (test__floatundisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
  83         return 1;
  84
  85     if (test__floatundisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
  86         return 1;
  87     if (test__floatundisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
  88         return 1;
  89     if (test__floatundisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
  90         return 1;
  91     if (test__floatundisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
  92         return 1;
  93     if (test__floatundisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
  94         return 1;
  95
  96    return 0;
  97 }