1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_fixunsxfsi
3
4 #include "int_lib.h"
5 #include <stdio.h>
6
7 #if HAS_80_BIT_LONG_DOUBLE
8 // Returns: convert a to a unsigned int, rounding toward zero.
9 // Negative values all become zero.
10
11 // Assumption: long double is an intel 80 bit floating point type padded with 6 bytes
12 // su_int is a 32 bit integral type
13 // value in long double is representable in su_int or is negative
14 // (no range checking performed)
15
16 // gggg gggg gggg gggg gggg gggg gggg gggg | gggg gggg gggg gggg seee eeee eeee eeee |
17 // 1mmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
18
19 COMPILER_RT_ABI su_int __fixunsxfsi(long double a);
20
test__fixunsxfsi(long double a,su_int expected)21 int test__fixunsxfsi(long double a, su_int expected)
22 {
23 su_int x = __fixunsxfsi(a);
24 if (x != expected)
25 printf("error in __fixunsxfsi(%LA) = %X, expected %X\n", a, x, expected);
26 return x != expected;
27 }
28
29 char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
30 char assumption_3[sizeof(long double)*CHAR_BIT == 128] = {0};
31 #endif
32
main()33 int main()
34 {
35 #if HAS_80_BIT_LONG_DOUBLE
36 if (test__fixunsxfsi(0.0, 0))
37 return 1;
38
39 if (test__fixunsxfsi(0.5, 0))
40 return 1;
41 if (test__fixunsxfsi(0.99, 0))
42 return 1;
43 if (test__fixunsxfsi(1.0, 1))
44 return 1;
45 if (test__fixunsxfsi(1.5, 1))
46 return 1;
47 if (test__fixunsxfsi(1.99, 1))
48 return 1;
49 if (test__fixunsxfsi(2.0, 2))
50 return 1;
51 if (test__fixunsxfsi(2.01, 2))
52 return 1;
53 if (test__fixunsxfsi(-0.5, 0))
54 return 1;
55 if (test__fixunsxfsi(-0.99, 0))
56 return 1;
57 #if !TARGET_LIBGCC
58 if (test__fixunsxfsi(-1.0, 0)) // libgcc ignores "returns 0 for negative input" spec
59 return 1;
60 if (test__fixunsxfsi(-1.5, 0))
61 return 1;
62 if (test__fixunsxfsi(-1.99, 0))
63 return 1;
64 if (test__fixunsxfsi(-2.0, 0))
65 return 1;
66 if (test__fixunsxfsi(-2.01, 0))
67 return 1;
68 #endif
69
70 if (test__fixunsxfsi(0x1.000000p+31, 0x80000000))
71 return 1;
72 if (test__fixunsxfsi(0x1.FFFFFEp+31, 0xFFFFFF00))
73 return 1;
74 if (test__fixunsxfsi(0x1.FFFFFEp+30, 0x7FFFFF80))
75 return 1;
76 if (test__fixunsxfsi(0x1.FFFFFCp+30, 0x7FFFFF00))
77 return 1;
78
79 #if !TARGET_LIBGCC
80 if (test__fixunsxfsi(-0x1.FFFFFEp+30, 0))
81 return 1;
82 if (test__fixunsxfsi(-0x1.FFFFFCp+30, 0))
83 return 1;
84 #endif
85
86 if (test__fixunsxfsi(0x1.FFFFFFFEp+31, 0xFFFFFFFF))
87 return 1;
88 if (test__fixunsxfsi(0x1.FFFFFFFC00000p+30, 0x7FFFFFFF))
89 return 1;
90 if (test__fixunsxfsi(0x1.FFFFFFF800000p+30, 0x7FFFFFFE))
91 return 1;
92
93 #endif
94 return 0;
95 }
96