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

   1 //===-- fixunsxfsi_test.c - Test __fixunsxfsi -----------------------------===//
   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 __fixunsxfsi for the compiler_rt library.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "int_lib.h"
  15 #include <stdio.h>
  16
  17 #if HAS_80_BIT_LONG_DOUBLE
  18 // Returns: convert a to a unsigned int, rounding toward zero.
  19 //          Negative values all become zero.
  20
  21 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  22 //             su_int is a 32 bit integral type
  23 //             value in long double is representable in su_int or is negative
  24 //                 (no range checking performed)
  25
  26 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  27 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  28
  29 COMPILER_RT_ABI su_int __fixunsxfsi(long double a);
  30
  31 int test__fixunsxfsi(long double a, su_int expected)
  32 {
  33     su_int x = __fixunsxfsi(a);
  34     if (x != expected)
  35         printf("error in __fixunsxfsi(%LA) = %X, expected %X\n", a, x, expected);
  36     return x != expected;
  37 }
  38
  39 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  40 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  41 #endif
  42
  43 int main()
  44 {
  45 #if HAS_80_BIT_LONG_DOUBLE
  46     if (test__fixunsxfsi(0.0, 0))
  47         return 1;
  48
  49     if (test__fixunsxfsi(0.5, 0))
  50         return 1;
  51     if (test__fixunsxfsi(0.99, 0))
  52         return 1;
  53     if (test__fixunsxfsi(1.0, 1))
  54         return 1;
  55     if (test__fixunsxfsi(1.5, 1))
  56         return 1;
  57     if (test__fixunsxfsi(1.99, 1))
  58         return 1;
  59     if (test__fixunsxfsi(2.0, 2))
  60         return 1;
  61     if (test__fixunsxfsi(2.01, 2))
  62         return 1;
  63     if (test__fixunsxfsi(-0.5, 0))
  64         return 1;
  65     if (test__fixunsxfsi(-0.99, 0))
  66         return 1;
  67 #if !TARGET_LIBGCC
  68     if (test__fixunsxfsi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  69         return 1;
  70     if (test__fixunsxfsi(-1.5, 0))
  71         return 1;
  72     if (test__fixunsxfsi(-1.99, 0))
  73         return 1;
  74     if (test__fixunsxfsi(-2.0, 0))
  75         return 1;
  76     if (test__fixunsxfsi(-2.01, 0))
  77         return 1;
  78 #endif
  79
  80     if (test__fixunsxfsi(0x1.000000p+31, 0x80000000))
  81         return 1;
  82     if (test__fixunsxfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
  83         return 1;
  84     if (test__fixunsxfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
  85         return 1;
  86     if (test__fixunsxfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
  87         return 1;
  88
  89 #if !TARGET_LIBGCC
  90     if (test__fixunsxfsi(-0x1.FFFFFEp+30, 0))
  91         return 1;
  92     if (test__fixunsxfsi(-0x1.FFFFFCp+30, 0))
  93         return 1;
  94 #endif
  95
  96     if (test__fixunsxfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
  97         return 1;
  98     if (test__fixunsxfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
  99         return 1;
 100     if (test__fixunsxfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
 101         return 1;
 102
 103 #endif
 104    return 0;
 105 }