1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_divdf3
3
4 #include "int_lib.h"
5 #include <stdio.h>
6
7 #include "fp_test.h"
8
9 // Returns: a / b
10 COMPILER_RT_ABI double __divdf3(double a, double b);
11
test__divdf3(double a,double b,uint64_t expected)12 int test__divdf3(double a, double b, uint64_t expected)
13 {
14 double x = __divdf3(a, b);
15 int ret = compareResultD(x, expected);
16
17 if (ret){
18 printf("error in test__divdf3(%.20e, %.20e) = %.20e, "
19 "expected %.20e\n", a, b, x,
20 fromRep64(expected));
21 }
22 return ret;
23 }
24
main()25 int main()
26 {
27 // Returned NaNs are assumed to be qNaN by default
28
29 // qNaN / any = qNaN
30 if (test__divdf3(makeQNaN64(), 3., UINT64_C(0x7ff8000000000000)))
31 return 1;
32 // NaN / any = NaN
33 if (test__divdf3(makeNaN64(UINT64_C(0x123)), 3., UINT64_C(0x7ff8000000000000)))
34 return 1;
35 // any / qNaN = qNaN
36 if (test__divdf3(3., makeQNaN64(), UINT64_C(0x7ff8000000000000)))
37 return 1;
38 // any / NaN = NaN
39 if (test__divdf3(3., makeNaN64(UINT64_C(0x123)), UINT64_C(0x7ff8000000000000)))
40 return 1;
41
42 // +Inf / positive = +Inf
43 if (test__divdf3(makeInf64(), 3., UINT64_C(0x7ff0000000000000)))
44 return 1;
45 // +Inf / negative = -Inf
46 if (test__divdf3(makeInf64(), -3., UINT64_C(0xfff0000000000000)))
47 return 1;
48 // -Inf / positive = -Inf
49 if (test__divdf3(makeNegativeInf64(), 3., UINT64_C(0xfff0000000000000)))
50 return 1;
51 // -Inf / negative = +Inf
52 if (test__divdf3(makeNegativeInf64(), -3., UINT64_C(0x7ff0000000000000)))
53 return 1;
54
55 // Inf / Inf = NaN
56 if (test__divdf3(makeInf64(), makeInf64(), UINT64_C(0x7ff8000000000000)))
57 return 1;
58 // 0.0 / 0.0 = NaN
59 if (test__divdf3(+0x0.0p+0, +0x0.0p+0, UINT64_C(0x7ff8000000000000)))
60 return 1;
61 // +0.0 / +Inf = +0.0
62 if (test__divdf3(+0x0.0p+0, makeInf64(), UINT64_C(0x0)))
63 return 1;
64 // +Inf / +0.0 = +Inf
65 if (test__divdf3(makeInf64(), +0x0.0p+0, UINT64_C(0x7ff0000000000000)))
66 return 1;
67
68 // positive / +0.0 = +Inf
69 if (test__divdf3(+1.0, +0x0.0p+0, UINT64_C(0x7ff0000000000000)))
70 return 1;
71 // positive / -0.0 = -Inf
72 if (test__divdf3(+1.0, -0x0.0p+0, UINT64_C(0xfff0000000000000)))
73 return 1;
74 // negative / +0.0 = -Inf
75 if (test__divdf3(-1.0, +0x0.0p+0, UINT64_C(0xfff0000000000000)))
76 return 1;
77 // negative / -0.0 = +Inf
78 if (test__divdf3(-1.0, -0x0.0p+0, UINT64_C(0x7ff0000000000000)))
79 return 1;
80
81 // 1/3
82 if (test__divdf3(1., 3., UINT64_C(0x3fd5555555555555)))
83 return 1;
84 // smallest normal result
85 if (test__divdf3(0x1.0p-1021, 2., UINT64_C(0x10000000000000)))
86 return 1;
87
88 // divisor is exactly 1.0
89 if (test__divdf3(0x1.0p+0, 0x1.0p+0, UINT64_C(0x3ff0000000000000)))
90 return 1;
91 // divisor is truncated to exactly 1.0 in UQ1.31
92 if (test__divdf3(0x1.0p+0, 0x1.00000001p+0, UINT64_C(0x3fefffffffe00000)))
93 return 1;
94
95 // smallest normal value divided by 2.0
96 if (test__divdf3(0x1.0p-1022, 2., UINT64_C(0x0008000000000000)))
97 return 1;
98 // smallest subnormal result
99 if (test__divdf3(0x1.0p-1022, 0x1.0p+52, UINT64_C(0x0000000000000001)))
100 return 1;
101
102 // some misc test cases obtained by fuzzing against h/w implementation
103 if (test__divdf3(0x1.fdc239dd64735p-658, -0x1.fff9364c0843fp-948, UINT64_C(0xd20fdc8fc0ceffb1)))
104 return 1;
105 if (test__divdf3(-0x1.78abb261d47c8p+794, 0x1.fb01d537cc5aep+266, UINT64_C(0xe0e7c6148ffc23e3)))
106 return 1;
107 if (test__divdf3(-0x1.da7dfe6048b8bp-875, 0x1.ffc7ea3ff60a4p-610, UINT64_C(0xaf5dab1fe0269e2a)))
108 return 1;
109 if (test__divdf3(0x1.0p-1022, 0x1.9p+5, UINT64_C(0x000051eb851eb852)))
110 return 1;
111 if (test__divdf3(0x1.0p-1022, 0x1.0028p+41, UINT64_C(0x00000000000007ff)))
112 return 1;
113 if (test__divdf3(0x1.0p-1022, 0x1.0028p+52, UINT64_C(0x1)))
114 return 1;
115
116 return 0;
117 }
118