src/compiler-rt/test/builtins/Unit/fixunsdfsi_test.c

   1 //===-- fixunsdfsi_test.c - Test __fixunsdfsi -----------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9 //
  10 // This file tests __fixunsdfsi for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 // Returns: convert a to a unsigned int, rounding toward zero.
  18 //          Negative values all become zero.
  19
  20 // Assumption: double is a IEEE 64 bit floating point type
  21 //             su_int is a 32 bit integral type
  22 //             value in double is representable in su_int or is negative
  23 //                 (no range checking performed)
  24
  25 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  26
  27 COMPILER_RT_ABI su_int __fixunsdfsi(double a);
  28
  29 int test__fixunsdfsi(double a, su_int expected)
  30 {
  31     su_int x = __fixunsdfsi(a);
  32     if (x != expected)
  33         printf("error in __fixunsdfsi(%A) = %X, expected %X\n", a, x, expected);
  34     return x != expected;
  35 }
  36
  37 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  38 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
  39
  40 int main()
  41 {
  42     if (test__fixunsdfsi(0.0, 0))
  43         return 1;
  44
  45     if (test__fixunsdfsi(0.5, 0))
  46         return 1;
  47     if (test__fixunsdfsi(0.99, 0))
  48         return 1;
  49     if (test__fixunsdfsi(1.0, 1))
  50         return 1;
  51     if (test__fixunsdfsi(1.5, 1))
  52         return 1;
  53     if (test__fixunsdfsi(1.99, 1))
  54         return 1;
  55     if (test__fixunsdfsi(2.0, 2))
  56         return 1;
  57     if (test__fixunsdfsi(2.01, 2))
  58         return 1;
  59     if (test__fixunsdfsi(-0.5, 0))
  60         return 1;
  61     if (test__fixunsdfsi(-0.99, 0))
  62         return 1;
  63 #if !TARGET_LIBGCC
  64     if (test__fixunsdfsi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  65         return 1;
  66     if (test__fixunsdfsi(-1.5, 0))
  67         return 1;
  68     if (test__fixunsdfsi(-1.99, 0))
  69         return 1;
  70     if (test__fixunsdfsi(-2.0, 0))
  71         return 1;
  72     if (test__fixunsdfsi(-2.01, 0))
  73         return 1;
  74 #endif
  75
  76     if (test__fixunsdfsi(0x1.000000p+31, 0x80000000))
  77         return 1;
  78     if (test__fixunsdfsi(0x1.000000p+32, 0xFFFFFFFF))
  79         return 1;
  80     if (test__fixunsdfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
  81         return 1;
  82     if (test__fixunsdfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
  83         return 1;
  84     if (test__fixunsdfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
  85         return 1;
  86
  87 #if !TARGET_LIBGCC
  88     if (test__fixunsdfsi(-0x1.FFFFFEp+30, 0))
  89         return 1;
  90     if (test__fixunsdfsi(-0x1.FFFFFCp+30, 0))
  91         return 1;
  92 #endif
  93
  94     if (test__fixunsdfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
  95         return 1;
  96     if (test__fixunsdfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
  97         return 1;
  98     if (test__fixunsdfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
  99         return 1;
 100
 101    return 0;
 102 }