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

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