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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixsfti
   3 // REQUIRES: int128
   4 //===-- fixsfti_test.c - Test __fixsfti -----------------------------------===//
   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 __fixsfti for the compiler_rt library.
  13 //
  14 //===----------------------------------------------------------------------===//
  15
  16 #include "int_lib.h"
  17 #include <stdio.h>
  18
  19 #ifdef CRT_HAS_128BIT
  20
  21 // Returns: convert a to a signed long long, rounding toward zero.
  22
  23 // Assumption: float is a IEEE 32 bit floating point type
  24 //             su_int is a 32 bit integral type
  25 //             value in float is representable in ti_int (no range checking performed)
  26
  27 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  28
  29 COMPILER_RT_ABI ti_int __fixsfti(float a);
  30
  31 int test__fixsfti(float a, ti_int expected)
  32 {
  33     ti_int x = __fixsfti(a);
  34     if (x != expected)
  35     {
  36         twords xt;
  37         xt.all = x;
  38         twords expectedt;
  39         expectedt.all = expected;
  40         printf("error in __fixsfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  41         a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  42     }
  43     return x != expected;
  44 }
  45
  46 char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
  47 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  48 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  49
  50 #endif
  51
  52 int main()
  53 {
  54 #ifdef CRT_HAS_128BIT
  55     if (test__fixsfti(0.0F, 0))
  56         return 1;
  57
  58     if (test__fixsfti(0.5F, 0))
  59         return 1;
  60     if (test__fixsfti(0.99F, 0))
  61         return 1;
  62     if (test__fixsfti(1.0F, 1))
  63         return 1;
  64     if (test__fixsfti(1.5F, 1))
  65         return 1;
  66     if (test__fixsfti(1.99F, 1))
  67         return 1;
  68     if (test__fixsfti(2.0F, 2))
  69         return 1;
  70     if (test__fixsfti(2.01F, 2))
  71         return 1;
  72     if (test__fixsfti(-0.5F, 0))
  73         return 1;
  74     if (test__fixsfti(-0.99F, 0))
  75         return 1;
  76     if (test__fixsfti(-1.0F, -1))
  77         return 1;
  78     if (test__fixsfti(-1.5F, -1))
  79         return 1;
  80     if (test__fixsfti(-1.99F, -1))
  81         return 1;
  82     if (test__fixsfti(-2.0F, -2))
  83         return 1;
  84     if (test__fixsfti(-2.01F, -2))
  85         return 1;
  86
  87     if (test__fixsfti(0x1.FFFFFEp+62F, 0x7FFFFF8000000000LL))
  88         return 1;
  89     if (test__fixsfti(0x1.FFFFFCp+62F, 0x7FFFFF0000000000LL))
  90         return 1;
  91
  92     if (test__fixsfti(-0x1.FFFFFEp+62F, make_ti(0xFFFFFFFFFFFFFFFFLL,
  93                                                 0x8000008000000000LL)))
  94         return 1;
  95     if (test__fixsfti(-0x1.FFFFFCp+62F, make_ti(0xFFFFFFFFFFFFFFFFLL,
  96                                                 0x8000010000000000LL)))
  97         return 1;
  98
  99     if (test__fixsfti(0x1.FFFFFEp+126F, make_ti(0x7FFFFF8000000000LL, 0)))
 100         return 1;
 101     if (test__fixsfti(0x1.FFFFFCp+126F, make_ti(0x7FFFFF0000000000LL, 0)))
 102         return 1;
 103
 104     if (test__fixsfti(-0x1.FFFFFEp+126F, make_ti(0x8000008000000000LL, 0)))
 105         return 1;
 106     if (test__fixsfti(-0x1.FFFFFCp+126F, make_ti(0x8000010000000000LL, 0)))
 107         return 1;
 108
 109 #else
 110     printf("skipped\n");
 111 #endif
 112    return 0;
 113 }