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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floattisf
   3 // REQUIRES: int128
   4 //===-- floattisf_test.c - Test __floattisf -------------------------------===//
   5 //
   6 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   7 // See https://llvm.org/LICENSE.txt for license information.
   8 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   9 //
  10 //===----------------------------------------------------------------------===//
  11 //
  12 // This file tests __floattisf for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "int_lib.h"
  17 #include <float.h>
  18 #include <stdio.h>
  19
  20 #ifdef CRT_HAS_128BIT
  21
  22 // Returns: convert a to a float, rounding toward even.
  23
  24 // Assumption: float is a IEEE 32 bit floating point type
  25 //             ti_int is a 64 bit integral type
  26
  27 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  28
  29 COMPILER_RT_ABI float __floattisf(ti_int a);
  30
  31 int test__floattisf(ti_int a, float expected)
  32 {
  33     float x = __floattisf(a);
  34     if (x != expected)
  35     {
  36         twords at;
  37         at.all = a;
  38         printf("error in __floattisf(0x%.16llX%.16llX) = %a, expected %a\n",
  39                at.s.high, at.s.low, x, expected);
  40     }
  41     return x != expected;
  42 }
  43
  44 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  45 char assumption_2[sizeof(ti_int)*CHAR_BIT == 128] = {0};
  46 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  47
  48 #endif
  49
  50 int main()
  51 {
  52 #ifdef CRT_HAS_128BIT
  53     if (test__floattisf(0, 0.0F))
  54         return 1;
  55
  56     if (test__floattisf(1, 1.0F))
  57         return 1;
  58     if (test__floattisf(2, 2.0F))
  59         return 1;
  60     if (test__floattisf(-1, -1.0F))
  61         return 1;
  62     if (test__floattisf(-2, -2.0F))
  63         return 1;
  64
  65     if (test__floattisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
  66         return 1;
  67     if (test__floattisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
  68         return 1;
  69
  70     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000008000000000LL),
  71                         -0x1.FFFFFEp+62F))
  72         return 1;
  73     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000010000000000LL),
  74                         -0x1.FFFFFCp+62F))
  75         return 1;
  76
  77     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000000000000000LL),
  78                         -0x1.000000p+63F))
  79         return 1;
  80     if (test__floattisf(make_ti(0xFFFFFFFFFFFFFFFFLL, 0x8000000000000001LL),
  81                         -0x1.000000p+63F))
  82         return 1;
  83
  84     if (test__floattisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
  85         return 1;
  86
  87     if (test__floattisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
  88         return 1;
  89     if (test__floattisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
  90         return 1;
  91     if (test__floattisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
  92         return 1;
  93     if (test__floattisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
  94         return 1;
  95     if (test__floattisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
  96         return 1;
  97
  98     if (test__floattisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
  99         return 1;
 100     if (test__floattisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
 101         return 1;
 102     if (test__floattisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
 103         return 1;
 104     if (test__floattisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
 105         return 1;
 106     if (test__floattisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
 107         return 1;
 108
 109     if (test__floattisf(make_ti(0x0007FB72E8000000LL, 0), 0x1.FEDCBAp+114F))
 110         return 1;
 111
 112     if (test__floattisf(make_ti(0x0007FB72EA000000LL, 0), 0x1.FEDCBAp+114F))
 113         return 1;
 114     if (test__floattisf(make_ti(0x0007FB72EB000000LL, 0), 0x1.FEDCBAp+114F))
 115         return 1;
 116     if (test__floattisf(make_ti(0x0007FB72EBFFFFFFLL, 0), 0x1.FEDCBAp+114F))
 117         return 1;
 118     if (test__floattisf(make_ti(0x0007FB72EC000000LL, 0), 0x1.FEDCBCp+114F))
 119         return 1;
 120     if (test__floattisf(make_ti(0x0007FB72E8000001LL, 0), 0x1.FEDCBAp+114F))
 121         return 1;
 122
 123     if (test__floattisf(make_ti(0x0007FB72E6000000LL, 0), 0x1.FEDCBAp+114F))
 124         return 1;
 125     if (test__floattisf(make_ti(0x0007FB72E7000000LL, 0), 0x1.FEDCBAp+114F))
 126         return 1;
 127     if (test__floattisf(make_ti(0x0007FB72E7FFFFFFLL, 0), 0x1.FEDCBAp+114F))
 128         return 1;
 129     if (test__floattisf(make_ti(0x0007FB72E4000001LL, 0), 0x1.FEDCBAp+114F))
 130         return 1;
 131     if (test__floattisf(make_ti(0x0007FB72E4000000LL, 0), 0x1.FEDCB8p+114F))
 132         return 1;
 133
 134 #else
 135     printf("skipped\n");
 136 #endif
 137    return 0;
 138 }