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1 //===-- fixunsxfdi_test.c - Test __fixunsxfdi -----------------------------===//
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 __fixunsxfdi for the compiler_rt library.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #include "int_lib.h"
15 #include <stdio.h>
16 #include <limits.h>
17 
18 
19 #if HAS_80_BIT_LONG_DOUBLE
20 // Returns: convert a to a unsigned long long, rounding toward zero.
21 //          Negative values all become zero.
22 
23 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
24 //             du_int is a 64 bit integral type
25 //             value in long double is representable in du_int or is negative
26 //                 (no range checking performed)
27 
28 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
29 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
30 
31 COMPILER_RT_ABI du_int __fixunsxfdi(long double a);
32 
test__fixunsxfdi(long double a,du_int expected)33 int test__fixunsxfdi(long double a, du_int expected)
34 {
35     du_int x = __fixunsxfdi(a);
36     if (x != expected)
37         printf("error in __fixunsxfdi(%LA) = %llX, expected %llX\n",
38                a, x, expected);
39     return x != expected;
40 }
41 
42 char assumption_1[sizeof(du_int) == 2*sizeof(su_int)] = {0};
43 char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
44 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
45 #endif
46 
main()47 int main()
48 {
49 #if HAS_80_BIT_LONG_DOUBLE
50     if (test__fixunsxfdi(0.0, 0))
51         return 1;
52 
53     if (test__fixunsxfdi(0.5, 0))
54         return 1;
55     if (test__fixunsxfdi(0.99, 0))
56         return 1;
57     if (test__fixunsxfdi(1.0, 1))
58         return 1;
59     if (test__fixunsxfdi(1.5, 1))
60         return 1;
61     if (test__fixunsxfdi(1.99, 1))
62         return 1;
63     if (test__fixunsxfdi(2.0, 2))
64         return 1;
65     if (test__fixunsxfdi(2.01, 2))
66         return 1;
67     if (test__fixunsxfdi(-0.5, 0))
68         return 1;
69     if (test__fixunsxfdi(-0.99, 0))
70         return 1;
71     if (test__fixunsxfdi(-1.0, 0))
72         return 1;
73     if (test__fixunsxfdi(-1.5, 0))
74         return 1;
75     if (test__fixunsxfdi(-1.99, 0))
76         return 1;
77     if (test__fixunsxfdi(-2.0, 0))
78         return 1;
79     if (test__fixunsxfdi(-2.01, 0))
80         return 1;
81 
82     if (test__fixunsxfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
83         return 1;
84     if (test__fixunsxfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
85         return 1;
86 
87     if (test__fixunsxfdi(-0x1.FFFFFEp+62, 0))
88         return 1;
89     if (test__fixunsxfdi(-0x1.FFFFFCp+62, 0))
90         return 1;
91 
92     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
93         return 1;
94     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
95         return 1;
96 
97     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFp+62, 0))
98         return 1;
99     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFEp+62, 0))
100         return 1;
101 
102     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFFEp+63L, 0xFFFFFFFFFFFFFFFFLL))
103         return 1;
104     if (test__fixunsxfdi(0x1.0000000000000002p+63L, 0x8000000000000001LL))
105         return 1;
106     if (test__fixunsxfdi(0x1.0000000000000000p+63L, 0x8000000000000000LL))
107         return 1;
108     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFFCp+62L, 0x7FFFFFFFFFFFFFFFLL))
109         return 1;
110     if (test__fixunsxfdi(0x1.FFFFFFFFFFFFFFF8p+62L, 0x7FFFFFFFFFFFFFFELL))
111         return 1;
112 
113     if (test__fixunsxfdi(-0x1.0000000000000000p+63L, 0))
114         return 1;
115     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFFFCp+62L, 0))
116         return 1;
117     if (test__fixunsxfdi(-0x1.FFFFFFFFFFFFFFF8p+62L, 0))
118         return 1;
119 
120 #else
121     printf("skipped\n");
122 #endif
123    return 0;
124 }
125