1 // RUN: %clang_builtins %s %librt -o %t && %run %t
2 // REQUIRES: librt_has_fixdfti
10 // Returns: convert a to a signed long long, rounding toward zero.
12 // Assumption: double is a IEEE 64 bit floating point type
13 // su_int is a 32 bit integral type
14 // value in double is representable in ti_int (no range checking performed)
16 // seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
18 COMPILER_RT_ABI ti_int
__fixdfti(double a
);
20 int test__fixdfti(double a
, ti_int expected
)
22 ti_int x
= __fixdfti(a
);
28 expectedt
.all
= expected
;
29 printf("error in __fixdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
30 a
, xt
.s
.high
, xt
.s
.low
, expectedt
.s
.high
, expectedt
.s
.low
);
35 char assumption_1
[sizeof(ti_int
) == 2*sizeof(di_int
)] = {0};
36 char assumption_2
[sizeof(su_int
)*CHAR_BIT
== 32] = {0};
37 char assumption_3
[sizeof(double)*CHAR_BIT
== 64] = {0};
44 if (test__fixdfti(0.0, 0))
47 if (test__fixdfti(0.5, 0))
49 if (test__fixdfti(0.99, 0))
51 if (test__fixdfti(1.0, 1))
53 if (test__fixdfti(1.5, 1))
55 if (test__fixdfti(1.99, 1))
57 if (test__fixdfti(2.0, 2))
59 if (test__fixdfti(2.01, 2))
61 if (test__fixdfti(-0.5, 0))
63 if (test__fixdfti(-0.99, 0))
65 if (test__fixdfti(-1.0, -1))
67 if (test__fixdfti(-1.5, -1))
69 if (test__fixdfti(-1.99, -1))
71 if (test__fixdfti(-2.0, -2))
73 if (test__fixdfti(-2.01, -2))
76 if (test__fixdfti(0x1.FFFFFEp
+62, 0x7FFFFF8000000000LL
))
78 if (test__fixdfti(0x1.FFFFFCp
+62, 0x7FFFFF0000000000LL
))
81 if (test__fixdfti(-0x1.FFFFFEp
+62, make_ti(0xFFFFFFFFFFFFFFFFLL
,
82 0x8000008000000000LL
)))
84 if (test__fixdfti(-0x1.FFFFFCp
+62, make_ti(0xFFFFFFFFFFFFFFFFLL
,
85 0x8000010000000000LL
)))
88 if (test__fixdfti(0x1.FFFFFFFFFFFFFp
+62, 0x7FFFFFFFFFFFFC00LL
))
90 if (test__fixdfti(0x1.FFFFFFFFFFFFEp
+62, 0x7FFFFFFFFFFFF800LL
))
93 if (test__fixdfti(-0x1.FFFFFFFFFFFFFp
+62, make_ti(0xFFFFFFFFFFFFFFFFLL
,
94 0x8000000000000400LL
)))
96 if (test__fixdfti(-0x1.FFFFFFFFFFFFEp
+62, make_ti(0xFFFFFFFFFFFFFFFFLL
,
97 0x8000000000000800LL
)))
100 if (test__fixdfti(0x1.FFFFFFFFFFFFFp
+126, make_ti(0x7FFFFFFFFFFFFC00LL
, 0)))
102 if (test__fixdfti(0x1.FFFFFFFFFFFFEp
+126, make_ti(0x7FFFFFFFFFFFF800LL
, 0)))
105 if (test__fixdfti(-0x1.FFFFFFFFFFFFFp
+126, make_ti(0x8000000000000400LL
, 0)))
107 if (test__fixdfti(-0x1.FFFFFFFFFFFFEp
+126, make_ti(0x8000000000000800LL
, 0)))