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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunsxfsi
   3
   4 #include "int_lib.h"
   5 #include <stdio.h>
   6
   7 #if HAS_80_BIT_LONG_DOUBLE
   8 // Returns: convert a to a unsigned int, rounding toward zero.
   9 //          Negative values all become zero.
  10
  11 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
  12 //             su_int is a 32 bit integral type
  13 //             value in long double is representable in su_int or is negative
  14 //                 (no range checking performed)
  15
  16 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
  17 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
  18
  19 COMPILER_RT_ABI su_int __fixunsxfsi(long double a);
  20
  21 int test__fixunsxfsi(long double a, su_int expected)
  22 {
  23     su_int x = __fixunsxfsi(a);
  24     if (x != expected)
  25         printf("error in __fixunsxfsi(%LA) = %X, expected %X\n", a, x, expected);
  26     return x != expected;
  27 }
  28
  29 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  30 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
  31 #endif
  32
  33 int main()
  34 {
  35 #if HAS_80_BIT_LONG_DOUBLE
  36     if (test__fixunsxfsi(0.0, 0))
  37         return 1;
  38
  39     if (test__fixunsxfsi(0.5, 0))
  40         return 1;
  41     if (test__fixunsxfsi(0.99, 0))
  42         return 1;
  43     if (test__fixunsxfsi(1.0, 1))
  44         return 1;
  45     if (test__fixunsxfsi(1.5, 1))
  46         return 1;
  47     if (test__fixunsxfsi(1.99, 1))
  48         return 1;
  49     if (test__fixunsxfsi(2.0, 2))
  50         return 1;
  51     if (test__fixunsxfsi(2.01, 2))
  52         return 1;
  53     if (test__fixunsxfsi(-0.5, 0))
  54         return 1;
  55     if (test__fixunsxfsi(-0.99, 0))
  56         return 1;
  57 #if !TARGET_LIBGCC
  58     if (test__fixunsxfsi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
  59         return 1;
  60     if (test__fixunsxfsi(-1.5, 0))
  61         return 1;
  62     if (test__fixunsxfsi(-1.99, 0))
  63         return 1;
  64     if (test__fixunsxfsi(-2.0, 0))
  65         return 1;
  66     if (test__fixunsxfsi(-2.01, 0))
  67         return 1;
  68 #endif
  69
  70     if (test__fixunsxfsi(0x1.000000p+31, 0x80000000))
  71         return 1;
  72     if (test__fixunsxfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
  73         return 1;
  74     if (test__fixunsxfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
  75         return 1;
  76     if (test__fixunsxfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
  77         return 1;
  78
  79 #if !TARGET_LIBGCC
  80     if (test__fixunsxfsi(-0x1.FFFFFEp+30, 0))
  81         return 1;
  82     if (test__fixunsxfsi(-0x1.FFFFFCp+30, 0))
  83         return 1;
  84 #endif
  85
  86     if (test__fixunsxfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
  87         return 1;
  88     if (test__fixunsxfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
  89         return 1;
  90     if (test__fixunsxfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
  91         return 1;
  92
  93 #endif
  94    return 0;
  95 }