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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsxfti
   3 // REQUIRES: x86-target-arch
   4
   5 //===-- fixunsxfti_test.c - Test __fixunsxfti -----------------------------===//
   6 //
   7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   8 // See https://llvm.org/LICENSE.txt for license information.
   9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  10 //
  11 //===----------------------------------------------------------------------===//
  12 //
  13 // This file tests __fixunsxfti for the compiler_rt library.
  14 //
  15 //===----------------------------------------------------------------------===//
  16
  17 #include "int_lib.h"
  18 #include <stdio.h>
  19
  20 #if defined(CRT_HAS_128BIT) && HAS_80_BIT_LONG_DOUBLE
  21
  22 // Returns: convert a to a unsigned long long, rounding toward zero.
  23 //          Negative values all become zero.
  24
  25 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  26 //             tu_int is a 64 bit integral type
  27 //             value in long double is representable in tu_int or is negative
  28 //                 (no range checking performed)
  29
  30 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  31 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  32
  33 COMPILER_RT_ABI tu_int __fixunsxfti(long double a);
  34
  35 int test__fixunsxfti(long double a, tu_int expected)
  36 {
  37     tu_int x = __fixunsxfti(a);
  38     if (x != expected)
  39     {
  40         utwords xt;
  41         xt.all = x;
  42         utwords expectedt;
  43         expectedt.all = expected;
  44         printf("error in __fixunsxfti(%LA) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  45                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  46     }
  47     return x != expected;
  48 }
  49
  50 char assumption_1[sizeof(tu_int) == 2*sizeof(du_int)] = {0};
  51 char assumption_2[sizeof(tu_int)*CHAR_BIT == 128] = {0};
  52 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  53
  54 #endif
  55
  56 int main()
  57 {
  58 #if defined(CRT_HAS_128BIT) && HAS_80_BIT_LONG_DOUBLE
  59     if (test__fixunsxfti(0.0, 0))
  60         return 1;
  61
  62     if (test__fixunsxfti(0.5, 0))
  63         return 1;
  64     if (test__fixunsxfti(0.99, 0))
  65         return 1;
  66     if (test__fixunsxfti(1.0, 1))
  67         return 1;
  68     if (test__fixunsxfti(1.5, 1))
  69         return 1;
  70     if (test__fixunsxfti(1.99, 1))
  71         return 1;
  72     if (test__fixunsxfti(2.0, 2))
  73         return 1;
  74     if (test__fixunsxfti(2.01, 2))
  75         return 1;
  76     if (test__fixunsxfti(-0.5, 0))
  77         return 1;
  78     if (test__fixunsxfti(-0.99, 0))
  79         return 1;
  80     if (test__fixunsxfti(-1.0, 0))
  81         return 1;
  82     if (test__fixunsxfti(-1.5, 0))
  83         return 1;
  84     if (test__fixunsxfti(-1.99, 0))
  85         return 1;
  86     if (test__fixunsxfti(-2.0, 0))
  87         return 1;
  88     if (test__fixunsxfti(-2.01, 0))
  89         return 1;
  90
  91     if (test__fixunsxfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  92         return 1;
  93     if (test__fixunsxfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  94         return 1;
  95
  96     if (test__fixunsxfti(-0x1.FFFFFEp+62, 0))
  97         return 1;
  98     if (test__fixunsxfti(-0x1.FFFFFCp+62, 0))
  99         return 1;
 100
 101     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
 102         return 1;
 103     if (test__fixunsxfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
 104         return 1;
 105
 106     if (test__fixunsxfti(-0x1.FFFFFFFFFFFFFp+62, 0))
 107         return 1;
 108     if (test__fixunsxfti(-0x1.FFFFFFFFFFFFEp+62, 0))
 109         return 1;
 110
 111     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFFFEp+63L, 0xFFFFFFFFFFFFFFFFLL))
 112         return 1;
 113     if (test__fixunsxfti(0x1.0000000000000002p+63L, 0x8000000000000001LL))
 114         return 1;
 115     if (test__fixunsxfti(0x1.0000000000000000p+63L, 0x8000000000000000LL))
 116         return 1;
 117     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
 118         return 1;
 119     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
 120         return 1;
 121
 122     if (test__fixunsxfti(-0x1.0000000000000000p+63L, 0))
 123         return 1;
 124     if (test__fixunsxfti(-0x1.FFFFFFFFFFFFFFFCp+62L, 0))
 125         return 1;
 126     if (test__fixunsxfti(-0x1.FFFFFFFFFFFFFFF8p+62L, 0))
 127         return 1;
 128
 129     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFFFEp+127L, make_ti(0xFFFFFFFFFFFFFFFFLL, 0)))
 130         return 1;
 131     if (test__fixunsxfti(0x1.0000000000000002p+127L, make_ti(0x8000000000000001LL, 0)))
 132         return 1;
 133     if (test__fixunsxfti(0x1.0000000000000000p+127L, make_ti(0x8000000000000000LL, 0)))
 134         return 1;
 135     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFFFCp+126L, make_ti(0x7FFFFFFFFFFFFFFFLL, 0)))
 136         return 1;
 137     if (test__fixunsxfti(0x1.FFFFFFFFFFFFFFF8p+126L, make_ti(0x7FFFFFFFFFFFFFFELL, 0)))
 138         return 1;
 139
 140 #else
 141     printf("skipped\n");
 142 #endif
 143    return 0;
 144 }