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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_floatuntisf
   3 //===-- floatuntisf.c - Test __floatuntisf --------------------------------===//
   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 __floatuntisf for the compiler_rt library.
  12 //
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "int_lib.h"
  16 #include <float.h>
  17 #include <stdio.h>
  18
  19 #if defined(CRT_HAS_128BIT) && HAS_80_BIT_LONG_DOUBLE
  20
  21 // Returns: convert a to a float, rounding toward even.
  22
  23 // Assumption: float is a IEEE 32 bit floating point type
  24 //             tu_int is a 128 bit integral type
  25
  26 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  27
  28 COMPILER_RT_ABI float __floatuntisf(tu_int a);
  29
  30 int test__floatuntisf(tu_int a, float expected)
  31 {
  32     float x = __floatuntisf(a);
  33     if (x != expected)
  34     {
  35         utwords at;
  36         at.all = a;
  37         printf("error in __floatuntisf(0x%.16llX%.16llX) = %a, expected %a\n",
  38                at.s.high, at.s.low, x, expected);
  39     }
  40     return x != expected;
  41 }
  42
  43 COMPILE_TIME_ASSERT(sizeof(tu_int) == 2*sizeof(du_int));
  44 COMPILE_TIME_ASSERT(sizeof(tu_int)*CHAR_BIT == 128);
  45 COMPILE_TIME_ASSERT(sizeof(float)*CHAR_BIT == 32);
  46
  47 #endif
  48
  49 int main()
  50 {
  51 #if defined(CRT_HAS_128BIT) && HAS_80_BIT_LONG_DOUBLE
  52     if (test__floatuntisf(0, 0.0F))
  53         return 1;
  54
  55     if (test__floatuntisf(1, 1.0F))
  56         return 1;
  57     if (test__floatuntisf(2, 2.0F))
  58         return 1;
  59     if (test__floatuntisf(20, 20.0F))
  60         return 1;
  61
  62     if (test__floatuntisf(0x7FFFFF8000000000LL, 0x1.FFFFFEp+62F))
  63         return 1;
  64     if (test__floatuntisf(0x7FFFFF0000000000LL, 0x1.FFFFFCp+62F))
  65         return 1;
  66
  67     if (test__floatuntisf(make_ti(0x8000008000000000LL, 0), 0x1.000001p+127F))
  68         return 1;
  69     if (test__floatuntisf(make_ti(0x8000000000000800LL, 0), 0x1.0p+127F))
  70         return 1;
  71     if (test__floatuntisf(make_ti(0x8000010000000000LL, 0), 0x1.000002p+127F))
  72         return 1;
  73
  74     if (test__floatuntisf(make_ti(0x8000000000000000LL, 0), 0x1.000000p+127F))
  75         return 1;
  76
  77     if (test__floatuntisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
  78         return 1;
  79
  80     if (test__floatuntisf(0x0007FB72EA000000LL, 0x1.FEDCBA8p+50F))
  81         return 1;
  82     if (test__floatuntisf(0x0007FB72EB000000LL, 0x1.FEDCBACp+50F))
  83         return 1;
  84
  85     if (test__floatuntisf(0x0007FB72EC000000LL, 0x1.FEDCBBp+50F))
  86         return 1;
  87
  88     if (test__floatuntisf(0x0007FB72E6000000LL, 0x1.FEDCB98p+50F))
  89         return 1;
  90     if (test__floatuntisf(0x0007FB72E7000000LL, 0x1.FEDCB9Cp+50F))
  91         return 1;
  92     if (test__floatuntisf(0x0007FB72E4000000LL, 0x1.FEDCB9p+50F))
  93         return 1;
  94
  95     if (test__floatuntisf(0xFFFFFFFFFFFFFFFELL, 0x1p+64F))
  96         return 1;
  97     if (test__floatuntisf(0xFFFFFFFFFFFFFFFFLL, 0x1p+64F))
  98         return 1;
  99
 100     if (test__floatuntisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
 101         return 1;
 102
 103     if (test__floatuntisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
 104         return 1;
 105     if (test__floatuntisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
 106         return 1;
 107     if (test__floatuntisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
 108         return 1;
 109     if (test__floatuntisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
 110         return 1;
 111     if (test__floatuntisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
 112         return 1;
 113
 114     if (test__floatuntisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
 115         return 1;
 116     if (test__floatuntisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
 117         return 1;
 118     if (test__floatuntisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
 119         return 1;
 120     if (test__floatuntisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
 121         return 1;
 122     if (test__floatuntisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
 123         return 1;
 124
 125     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCB90000000000001LL),
 126                           0x1.FEDCBAp+76F))
 127         return 1;
 128     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBA0000000000000LL),
 129                           0x1.FEDCBAp+76F))
 130         return 1;
 131     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBAFFFFFFFFFFFFFLL),
 132                           0x1.FEDCBAp+76F))
 133         return 1;
 134     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBB0000000000000LL),
 135                           0x1.FEDCBCp+76F))
 136         return 1;
 137     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBB0000000000001LL),
 138                           0x1.FEDCBCp+76F))
 139         return 1;
 140     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBBFFFFFFFFFFFFFLL),
 141                           0x1.FEDCBCp+76F))
 142         return 1;
 143     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBC0000000000000LL),
 144                           0x1.FEDCBCp+76F))
 145         return 1;
 146     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBC0000000000001LL),
 147                           0x1.FEDCBCp+76F))
 148         return 1;
 149     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBD0000000000000LL),
 150                           0x1.FEDCBCp+76F))
 151         return 1;
 152     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBD0000000000001LL),
 153                           0x1.FEDCBEp+76F))
 154         return 1;
 155     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBDFFFFFFFFFFFFFLL),
 156                           0x1.FEDCBEp+76F))
 157         return 1;
 158     if (test__floatuntisf(make_ti(0x0000000000001FEDLL, 0xCBE0000000000000LL),
 159                           0x1.FEDCBEp+76F))
 160         return 1;
 161
 162 #else
 163     printf("skipped\n");
 164 #endif
 165    return 0;
 166 }