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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixsfdi
   3
   4 #include "int_lib.h"
   5 #include <stdio.h>
   6
   7 // Returns: convert a to a signed long long, rounding toward zero.
   8
   9 // Assumption: float is a IEEE 32 bit floating point type
  10 //             su_int is a 32 bit integral type
  11 //             value in float is representable in di_int (no range checking performed)
  12
  13 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  14
  15 COMPILER_RT_ABI di_int __fixsfdi(float a);
  16
  17 int test__fixsfdi(float a, di_int expected)
  18 {
  19     di_int x = __fixsfdi(a);
  20     if (x != expected)
  21         printf("error in __fixsfdi(%A) = %llX, expected %llX\n", a, x, expected);
  22     return x != expected;
  23 }
  24
  25 char assumption_1[sizeof(di_int) == 2*sizeof(si_int)] = {0};
  26 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  27 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  28
  29 int main()
  30 {
  31     if (test__fixsfdi(0.0F, 0))
  32         return 1;
  33
  34     if (test__fixsfdi(0.5F, 0))
  35         return 1;
  36     if (test__fixsfdi(0.99F, 0))
  37         return 1;
  38     if (test__fixsfdi(1.0F, 1))
  39         return 1;
  40     if (test__fixsfdi(1.5F, 1))
  41         return 1;
  42     if (test__fixsfdi(1.99F, 1))
  43         return 1;
  44     if (test__fixsfdi(2.0F, 2))
  45         return 1;
  46     if (test__fixsfdi(2.01F, 2))
  47         return 1;
  48     if (test__fixsfdi(-0.5F, 0))
  49         return 1;
  50     if (test__fixsfdi(-0.99F, 0))
  51         return 1;
  52     if (test__fixsfdi(-1.0F, -1))
  53         return 1;
  54     if (test__fixsfdi(-1.5F, -1))
  55         return 1;
  56     if (test__fixsfdi(-1.99F, -1))
  57         return 1;
  58     if (test__fixsfdi(-2.0F, -2))
  59         return 1;
  60     if (test__fixsfdi(-2.01F, -2))
  61         return 1;
  62
  63     if (test__fixsfdi(0x1.FFFFFEp+62F, 0x7FFFFF8000000000LL))
  64         return 1;
  65     if (test__fixsfdi(0x1.FFFFFCp+62F, 0x7FFFFF0000000000LL))
  66         return 1;
  67
  68     if (test__fixsfdi(-0x1.FFFFFEp+62F, 0x8000008000000000LL))
  69         return 1;
  70     if (test__fixsfdi(-0x1.FFFFFCp+62F, 0x8000010000000000LL))
  71         return 1;
  72
  73     if (test__fixsfdi(-0x8000000000000000.0p+0F, 0x8000000000000000LL))
  74         return 1;
  75
  76     return 0;
  77 }