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      1 //===-- fixunssfti_test.c - Test __fixunssfti -----------------------------===//
      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 __fixunssfti for the compiler_rt library.
     11 //
     12 //===----------------------------------------------------------------------===//
     13 
     14 #include "int_lib.h"
     15 #include <stdio.h>
     16 
     17 #ifdef CRT_HAS_128BIT
     18 
     19 // Returns: convert a to a unsigned long long, rounding toward zero.
     20 //          Negative values all become zero.
     21 
     22 // Assumption: float is a IEEE 32 bit floating point type
     23 //             tu_int is a 64 bit integral type
     24 //             value in float is representable in tu_int or is negative
     25 //                 (no range checking performed)
     26 
     27 // seee eeee emmm mmmm mmmm mmmm mmmm mmmm
     28 
     29 tu_int __fixunssfti(float a);
     30 
     31 int test__fixunssfti(float a, tu_int expected)
     32 {
     33     tu_int x = __fixunssfti(a);
     34     if (x != expected)
     35     {
     36         utwords xt;
     37         xt.all = x;
     38         utwords expectedt;
     39         expectedt.all = expected;
     40         printf("error in __fixunssfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
     41                a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
     42     }
     43     return x != expected;
     44 }
     45 
     46 char assumption_1[sizeof(tu_int) == 2*sizeof(di_int)] = {0};
     47 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
     48 char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
     49 
     50 #endif
     51 
     52 int main()
     53 {
     54 #ifdef CRT_HAS_128BIT
     55     if (test__fixunssfti(0.0F, 0))
     56         return 1;
     57 
     58     if (test__fixunssfti(0.5F, 0))
     59         return 1;
     60     if (test__fixunssfti(0.99F, 0))
     61         return 1;
     62     if (test__fixunssfti(1.0F, 1))
     63         return 1;
     64     if (test__fixunssfti(1.5F, 1))
     65         return 1;
     66     if (test__fixunssfti(1.99F, 1))
     67         return 1;
     68     if (test__fixunssfti(2.0F, 2))
     69         return 1;
     70     if (test__fixunssfti(2.01F, 2))
     71         return 1;
     72     if (test__fixunssfti(-0.5F, 0))
     73         return 1;
     74     if (test__fixunssfti(-0.99F, 0))
     75         return 1;
     76 #if !TARGET_LIBGCC
     77     if (test__fixunssfti(-1.0F, 0))  // libgcc ignores "returns 0 for negative input" spec
     78         return 1;
     79     if (test__fixunssfti(-1.5F, 0))
     80         return 1;
     81     if (test__fixunssfti(-1.99F, 0))
     82         return 1;
     83     if (test__fixunssfti(-2.0F, 0))
     84         return 1;
     85     if (test__fixunssfti(-2.01F, 0))
     86         return 1;
     87 #endif
     88 
     89     if (test__fixunssfti(0x1.FFFFFEp+63F, 0xFFFFFF0000000000LL))
     90         return 1;
     91     if (test__fixunssfti(0x1.000000p+63F, 0x8000000000000000LL))
     92         return 1;
     93     if (test__fixunssfti(0x1.FFFFFEp+62F, 0x7FFFFF8000000000LL))
     94         return 1;
     95     if (test__fixunssfti(0x1.FFFFFCp+62F, 0x7FFFFF0000000000LL))
     96         return 1;
     97 
     98     if (test__fixunssfti(0x1.FFFFFEp+127F, make_ti(0xFFFFFF0000000000LL, 0)))
     99         return 1;
    100     if (test__fixunssfti(0x1.000000p+127F, make_ti(0x8000000000000000LL, 0)))
    101         return 1;
    102     if (test__fixunssfti(0x1.FFFFFEp+126F, make_ti(0x7FFFFF8000000000LL, 0)))
    103         return 1;
    104     if (test__fixunssfti(0x1.FFFFFCp+126F, make_ti(0x7FFFFF0000000000LL, 0)))
    105         return 1;
    106 
    107 #if !TARGET_LIBGCC
    108     if (test__fixunssfti(-0x1.FFFFFEp+62F, 0x0000000000000000LL))
    109         return 1;
    110     if (test__fixunssfti(-0x1.FFFFFCp+62F, 0x0000000000000000LL))
    111         return 1;
    112     if (test__fixunssfti(-0x1.FFFFFEp+126F, 0x0000000000000000LL))
    113         return 1;
    114     if (test__fixunssfti(-0x1.FFFFFCp+126F, 0x0000000000000000LL))
    115         return 1;
    116 #endif
    117 
    118 #endif
    119    return 0;
    120 }
    121