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1 //===-- fixunsdfdi_test.c - Test __fixunsdfdi -----------------------------===//
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 __fixunsdfdi for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "int_lib.h"
15 #include <stdio.h>
16 
17 // Returns: convert a to a unsigned long long, rounding toward zero.
18 //          Negative values all become zero.
19 
20 // Assumption: double is a IEEE 64 bit floating point type
21 //             du_int is a 64 bit integral type
22 //             value in double is representable in du_int or is negative
23 //                 (no range checking performed)
24 
25 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
26 
27 COMPILER_RT_ABI du_int __fixunsdfdi(double a);
28 
test__fixunsdfdi(double a,du_int expected)29 int test__fixunsdfdi(double a, du_int expected)
30 {
31     du_int x = __fixunsdfdi(a);
32     if (x != expected)
33         printf("error in __fixunsdfdi(%A) = %llX, expected %llX\n", a, x, expected);
34     return x != expected;
35 }
36 
37 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
38 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
39 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
40 
main()41 int main()
42 {
43     if (test__fixunsdfdi(0.0, 0))
44         return 1;
45 
46     if (test__fixunsdfdi(0.5, 0))
47         return 1;
48     if (test__fixunsdfdi(0.99, 0))
49         return 1;
50     if (test__fixunsdfdi(1.0, 1))
51         return 1;
52     if (test__fixunsdfdi(1.5, 1))
53         return 1;
54     if (test__fixunsdfdi(1.99, 1))
55         return 1;
56     if (test__fixunsdfdi(2.0, 2))
57         return 1;
58     if (test__fixunsdfdi(2.01, 2))
59         return 1;
60     if (test__fixunsdfdi(-0.5, 0))
61         return 1;
62     if (test__fixunsdfdi(-0.99, 0))
63         return 1;
64 #if !TARGET_LIBGCC
65     if (test__fixunsdfdi(-1.0, 0))  // libgcc ignores "returns 0 for negative input" spec
66         return 1;
67     if (test__fixunsdfdi(-1.5, 0))
68         return 1;
69     if (test__fixunsdfdi(-1.99, 0))
70         return 1;
71     if (test__fixunsdfdi(-2.0, 0))
72         return 1;
73     if (test__fixunsdfdi(-2.01, 0))
74         return 1;
75 #endif
76 
77     if (test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
78         return 1;
79     if (test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
80         return 1;
81 
82 #if !TARGET_LIBGCC
83     if (test__fixunsdfdi(-0x1.FFFFFEp+62, 0))
84         return 1;
85     if (test__fixunsdfdi(-0x1.FFFFFCp+62, 0))
86         return 1;
87 #endif
88 
89     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800LL))
90         return 1;
91     if (test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000LL))
92         return 1;
93     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
94         return 1;
95     if (test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
96         return 1;
97 
98     if (test__fixunsdfdi(0x1.p+64, 0xFFFFFFFFFFFFFFFFLL))
99         return 1;
100 
101 #if !TARGET_LIBGCC
102     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
103         return 1;
104     if (test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
105         return 1;
106 #endif
107 
108    return 0;
109 }
110