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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixxfti
   3 // REQUIRES: x86-target-arch
   4
   5 //===-- fixxfti_test.c - Test __fixxfti -----------------------------------===//
   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 __fixxfti 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 signed long long, rounding toward zero.
  23
  24 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  25 //             su_int is a 32 bit integral type
  26 //             value in long double is representable in ti_int (no range checking performed)
  27
  28 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  29 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  30
  31 COMPILER_RT_ABI ti_int __fixxfti(long double a);
  32
  33 int test__fixxfti(long double a, ti_int expected)
  34 {
  35     ti_int x = __fixxfti(a);
  36     if (x != expected)
  37     {
  38         utwords xt;
  39         xt.all = x;
  40         utwords expectedt;
  41         expectedt.all = expected;
  42         printf("error in __fixxfti(%LA) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  43                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  44     }
  45     return x != expected;
  46 }
  47
  48 COMPILE_TIME_ASSERT(sizeof(ti_int) == 2*sizeof(di_int));
  49 COMPILE_TIME_ASSERT(sizeof(su_int)*CHAR_BIT == 32);
  50 COMPILE_TIME_ASSERT(sizeof(long double)*CHAR_BIT == 128);
  51
  52 #endif
  53
  54 int main()
  55 {
  56 #if defined(CRT_HAS_128BIT) && HAS_80_BIT_LONG_DOUBLE
  57     if (test__fixxfti(0.0, 0))
  58         return 1;
  59
  60     if (test__fixxfti(0.5, 0))
  61         return 1;
  62     if (test__fixxfti(0.99, 0))
  63         return 1;
  64     if (test__fixxfti(1.0, 1))
  65         return 1;
  66     if (test__fixxfti(1.5, 1))
  67         return 1;
  68     if (test__fixxfti(1.99, 1))
  69         return 1;
  70     if (test__fixxfti(2.0, 2))
  71         return 1;
  72     if (test__fixxfti(2.01, 2))
  73         return 1;
  74     if (test__fixxfti(-0.5, 0))
  75         return 1;
  76     if (test__fixxfti(-0.99, 0))
  77         return 1;
  78     if (test__fixxfti(-1.0, -1))
  79         return 1;
  80     if (test__fixxfti(-1.5, -1))
  81         return 1;
  82     if (test__fixxfti(-1.99, -1))
  83         return 1;
  84     if (test__fixxfti(-2.0, -2))
  85         return 1;
  86     if (test__fixxfti(-2.01, -2))
  87         return 1;
  88
  89     if (test__fixxfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
  90         return 1;
  91     if (test__fixxfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
  92         return 1;
  93
  94     if (test__fixxfti(-0x1.FFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
  95                                                0x8000008000000000LL)))
  96         return 1;
  97     if (test__fixxfti(-0x1.FFFFFCp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
  98                                                0x8000010000000000LL)))
  99         return 1;
 100
 101     if (test__fixxfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
 102         return 1;
 103     if (test__fixxfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
 104         return 1;
 105
 106     if (test__fixxfti(-0x1.FFFFFFFFFFFFFp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
 107                                                       0x8000000000000400LL)))
 108         return 1;
 109     if (test__fixxfti(-0x1.FFFFFFFFFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
 110                                                       0x8000000000000800LL)))
 111         return 1;
 112
 113     if (test__fixxfti(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
 114         return 1;
 115     if (test__fixxfti(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
 116         return 1;
 117
 118     if (test__fixxfti(-0x1.0000000000000000p+63L, make_ti(0xFFFFFFFFFFFFFFFFLL,
 119                                                           0x8000000000000000LL)))
 120         return 1;
 121     if (test__fixxfti(-0x1.FFFFFFFFFFFFFFFCp+62L, make_ti(0xFFFFFFFFFFFFFFFFLL,
 122                                                           0x8000000000000001LL)))
 123         return 1;
 124     if (test__fixxfti(-0x1.FFFFFFFFFFFFFFF8p+62L, make_ti(0xFFFFFFFFFFFFFFFFLL,
 125                                                           0x8000000000000002LL)))
 126         return 1;
 127
 128     if (test__fixxfti(0x1.FFFFFFFFFFFFFFFEp+126L, make_ti(0x7FFFFFFFFFFFFFFFLL,
 129                                                           0x8000000000000000LL)))
 130         return 1;
 131     if (test__fixxfti(0x1.FFFFFFFFFFFFFFFCp+126L, make_ti(0x7FFFFFFFFFFFFFFFLL,
 132                                                           0x0000000000000000LL)))
 133
 134         return 1;
 135
 136     if (test__fixxfti(-0x1.0000000000000000p+127L, make_ti(0x8000000000000000LL,
 137                                                            0x0000000000000000LL)))
 138         return 1;
 139     if (test__fixxfti(-0x1.FFFFFFFFFFFFFFFEp+126L, make_ti(0x8000000000000000LL,
 140                                                            0x8000000000000000LL)))
 141         return 1;
 142     if (test__fixxfti(-0x1.FFFFFFFFFFFFFFFCp+126L, make_ti(0x8000000000000001LL,
 143                                                            0x0000000000000000LL)))
 144         return 1;
 145 #else
 146     printf("skipped\n");
 147 #endif
 148    return 0;
 149 }