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

   1 // RUN: %clang_builtins %s %librt -o %t && %run %t
   2 // REQUIRES: librt_has_fixunssfti
   3 // REQUIRES: int128
   4
   5 #include "int_lib.h"
   6 #include <stdio.h>
   7
   8 #ifdef CRT_HAS_128BIT
   9
  10 // Returns: convert a to a unsigned long long, rounding toward zero.
  11 //          Negative values all become zero.
  12
  13 // Assumption: float is a IEEE 32 bit floating point type
  14 //             tu_int is a 64 bit integral type
  15 //             value in float is representable in tu_int or is negative
  16 //                 (no range checking performed)
  17
  18 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
  19
  20 COMPILER_RT_ABI tu_int __fixunssfti(float a);
  21
  22 int test__fixunssfti(float a, tu_int expected)
  23 {
  24     tu_int x = __fixunssfti(a);
  25     if (x != expected)
  26     {
  27         utwords xt;
  28         xt.all = x;
  29         utwords expectedt;
  30         expectedt.all = expected;
  31         printf("error in __fixunssfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
  32                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
  33     }
  34     return x != expected;
  35 }
  36
  37 char assumption_1[sizeof(tu_int) == 2*sizeof(di_int)] = {0};
  38 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
  39 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
  40
  41 #endif
  42
  43 int main()
  44 {
  45 #ifdef CRT_HAS_128BIT
  46     if (test__fixunssfti(0.0F, 0))
  47         return 1;
  48
  49     if (test__fixunssfti(0.5F, 0))
  50         return 1;
  51     if (test__fixunssfti(0.99F, 0))
  52         return 1;
  53     if (test__fixunssfti(1.0F, 1))
  54         return 1;
  55     if (test__fixunssfti(1.5F, 1))
  56         return 1;
  57     if (test__fixunssfti(1.99F, 1))
  58         return 1;
  59     if (test__fixunssfti(2.0F, 2))
  60         return 1;
  61     if (test__fixunssfti(2.01F, 2))
  62         return 1;
  63     if (test__fixunssfti(-0.5F, 0))
  64         return 1;
  65     if (test__fixunssfti(-0.99F, 0))
  66         return 1;
  67 #if !TARGET_LIBGCC
  68     if (test__fixunssfti(-1.0F, 0))  // libgcc ignores "returns 0 for negative input" spec
  69         return 1;
  70     if (test__fixunssfti(-1.5F, 0))
  71         return 1;
  72     if (test__fixunssfti(-1.99F, 0))
  73         return 1;
  74     if (test__fixunssfti(-2.0F, 0))
  75         return 1;
  76     if (test__fixunssfti(-2.01F, 0))
  77         return 1;
  78 #endif
  79
  80     if (test__fixunssfti(0x1.FFFFFEp+63F, 0xFFFFFF0000000000ULL))
  81         return 1;
  82     if (test__fixunssfti(0x1.000000p+63F, 0x8000000000000000ULL))
  83         return 1;
  84     if (test__fixunssfti(0x1.FFFFFEp+62F, 0x7FFFFF8000000000LL))
  85         return 1;
  86     if (test__fixunssfti(0x1.FFFFFCp+62F, 0x7FFFFF0000000000LL))
  87         return 1;
  88
  89     if (test__fixunssfti(0x1.FFFFFEp+127F, make_ti(0xFFFFFF0000000000ULL, 0)))
  90         return 1;
  91     if (test__fixunssfti(0x1.000000p+127F, make_ti(0x8000000000000000ULL, 0)))
  92         return 1;
  93     if (test__fixunssfti(0x1.FFFFFEp+126F, make_ti(0x7FFFFF8000000000LL, 0)))
  94         return 1;
  95     if (test__fixunssfti(0x1.FFFFFCp+126F, make_ti(0x7FFFFF0000000000LL, 0)))
  96         return 1;
  97
  98 #if !TARGET_LIBGCC
  99     if (test__fixunssfti(-0x1.FFFFFEp+62F, 0x0000000000000000LL))
 100         return 1;
 101     if (test__fixunssfti(-0x1.FFFFFCp+62F, 0x0000000000000000LL))
 102         return 1;
 103     if (test__fixunssfti(-0x1.FFFFFEp+126F, 0x0000000000000000LL))
 104         return 1;
 105     if (test__fixunssfti(-0x1.FFFFFCp+126F, 0x0000000000000000LL))
 106         return 1;
 107 #endif
 108
 109 #endif
 110    return 0;
 111 }