1 //===-- fixunsdfsi_test.c - Test __fixunsdfsi -----------------------------===//
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 __fixunsdfsi 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 int, rounding toward zero.
18 // Negative values all become zero.
19
20 // Assumption: double is a IEEE 64 bit floating point type
21 // su_int is a 32 bit integral type
22 // value in double is representable in su_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 su_int __fixunsdfsi(double a);
28
test__fixunsdfsi(double a,su_int expected)29 int test__fixunsdfsi(double a, su_int expected)
30 {
31 su_int x = __fixunsdfsi(a);
32 if (x != expected)
33 printf("error in __fixunsdfsi(%A) = %X, expected %X\n", a, x, expected);
34 return x != expected;
35 }
36
37 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
38 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
39
main()40 int main()
41 {
42 if (test__fixunsdfsi(0.0, 0))
43 return 1;
44
45 if (test__fixunsdfsi(0.5, 0))
46 return 1;
47 if (test__fixunsdfsi(0.99, 0))
48 return 1;
49 if (test__fixunsdfsi(1.0, 1))
50 return 1;
51 if (test__fixunsdfsi(1.5, 1))
52 return 1;
53 if (test__fixunsdfsi(1.99, 1))
54 return 1;
55 if (test__fixunsdfsi(2.0, 2))
56 return 1;
57 if (test__fixunsdfsi(2.01, 2))
58 return 1;
59 if (test__fixunsdfsi(-0.5, 0))
60 return 1;
61 if (test__fixunsdfsi(-0.99, 0))
62 return 1;
63 #if !TARGET_LIBGCC
64 if (test__fixunsdfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
65 return 1;
66 if (test__fixunsdfsi(-1.5, 0))
67 return 1;
68 if (test__fixunsdfsi(-1.99, 0))
69 return 1;
70 if (test__fixunsdfsi(-2.0, 0))
71 return 1;
72 if (test__fixunsdfsi(-2.01, 0))
73 return 1;
74 #endif
75
76 if (test__fixunsdfsi(0x1.000000p+31, 0x80000000))
77 return 1;
78 if (test__fixunsdfsi(0x1.000000p+32, 0xFFFFFFFF))
79 return 1;
80 if (test__fixunsdfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
81 return 1;
82 if (test__fixunsdfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
83 return 1;
84 if (test__fixunsdfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
85 return 1;
86
87 #if !TARGET_LIBGCC
88 if (test__fixunsdfsi(-0x1.FFFFFEp+30, 0))
89 return 1;
90 if (test__fixunsdfsi(-0x1.FFFFFCp+30, 0))
91 return 1;
92 #endif
93
94 if (test__fixunsdfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
95 return 1;
96 if (test__fixunsdfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
97 return 1;
98 if (test__fixunsdfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
99 return 1;
100
101 return 0;
102 }
103