1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_fixunsdfsi
3
4 #include "int_lib.h"
5 #include <stdio.h>
6
7 // Returns: convert a to a unsigned int, rounding toward zero.
8 // Negative values all become zero.
9
10 // Assumption: double is a IEEE 64 bit floating point type
11 // su_int is a 32 bit integral type
12 // value in double is representable in su_int or is negative
13 // (no range checking performed)
14
15 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
16
17 COMPILER_RT_ABI su_int __fixunsdfsi(double a);
18
test__fixunsdfsi(double a,su_int expected)19 int test__fixunsdfsi(double a, su_int expected)
20 {
21 su_int x = __fixunsdfsi(a);
22 if (x != expected)
23 printf("error in __fixunsdfsi(%A) = %X, expected %X\n", a, x, expected);
24 return x != expected;
25 }
26
27 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
28 char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
29
main()30 int main()
31 {
32 if (test__fixunsdfsi(0.0, 0))
33 return 1;
34
35 if (test__fixunsdfsi(0.5, 0))
36 return 1;
37 if (test__fixunsdfsi(0.99, 0))
38 return 1;
39 if (test__fixunsdfsi(1.0, 1))
40 return 1;
41 if (test__fixunsdfsi(1.5, 1))
42 return 1;
43 if (test__fixunsdfsi(1.99, 1))
44 return 1;
45 if (test__fixunsdfsi(2.0, 2))
46 return 1;
47 if (test__fixunsdfsi(2.01, 2))
48 return 1;
49 if (test__fixunsdfsi(-0.5, 0))
50 return 1;
51 if (test__fixunsdfsi(-0.99, 0))
52 return 1;
53 #if !TARGET_LIBGCC
54 if (test__fixunsdfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
55 return 1;
56 if (test__fixunsdfsi(-1.5, 0))
57 return 1;
58 if (test__fixunsdfsi(-1.99, 0))
59 return 1;
60 if (test__fixunsdfsi(-2.0, 0))
61 return 1;
62 if (test__fixunsdfsi(-2.01, 0))
63 return 1;
64 #endif
65
66 if (test__fixunsdfsi(0x1.000000p+31, 0x80000000))
67 return 1;
68 if (test__fixunsdfsi(0x1.000000p+32, 0xFFFFFFFF))
69 return 1;
70 if (test__fixunsdfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
71 return 1;
72 if (test__fixunsdfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
73 return 1;
74 if (test__fixunsdfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
75 return 1;
76
77 #if !TARGET_LIBGCC
78 if (test__fixunsdfsi(-0x1.FFFFFEp+30, 0))
79 return 1;
80 if (test__fixunsdfsi(-0x1.FFFFFCp+30, 0))
81 return 1;
82 #endif
83
84 if (test__fixunsdfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
85 return 1;
86 if (test__fixunsdfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
87 return 1;
88 if (test__fixunsdfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
89 return 1;
90
91 return 0;
92 }
93