122 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_divdf33 4#include "int_lib.h"5#include <stdio.h>6 7#include "fp_test.h"8 9// Returns: a / b10COMPILER_RT_ABI double __divdf3(double a, double b);11 12int 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 25int main()26{27 // Returned NaNs are assumed to be qNaN by default28 29 // qNaN / any = qNaN30 if (test__divdf3(makeQNaN64(), 3., UINT64_C(0x7ff8000000000000)))31 return 1;32 // NaN / any = NaN33 if (test__divdf3(makeNaN64(UINT64_C(0x123)), 3., UINT64_C(0x7ff8000000000000)))34 return 1;35 // any / qNaN = qNaN36 if (test__divdf3(3., makeQNaN64(), UINT64_C(0x7ff8000000000000)))37 return 1;38 // any / NaN = NaN39 if (test__divdf3(3., makeNaN64(UINT64_C(0x123)), UINT64_C(0x7ff8000000000000)))40 return 1;41 42 // +Inf / positive = +Inf43 if (test__divdf3(makeInf64(), 3., UINT64_C(0x7ff0000000000000)))44 return 1;45 // +Inf / negative = -Inf46 if (test__divdf3(makeInf64(), -3., UINT64_C(0xfff0000000000000)))47 return 1;48 // -Inf / positive = -Inf49 if (test__divdf3(makeNegativeInf64(), 3., UINT64_C(0xfff0000000000000)))50 return 1;51 // -Inf / negative = +Inf52 if (test__divdf3(makeNegativeInf64(), -3., UINT64_C(0x7ff0000000000000)))53 return 1;54 55 // Inf / Inf = NaN56 if (test__divdf3(makeInf64(), makeInf64(), UINT64_C(0x7ff8000000000000)))57 return 1;58 // 0.0 / 0.0 = NaN59 if (test__divdf3(+0x0.0p+0, +0x0.0p+0, UINT64_C(0x7ff8000000000000)))60 return 1;61 // +0.0 / +Inf = +0.062 if (test__divdf3(+0x0.0p+0, makeInf64(), UINT64_C(0x0)))63 return 1;64 // +Inf / +0.0 = +Inf65 if (test__divdf3(makeInf64(), +0x0.0p+0, UINT64_C(0x7ff0000000000000)))66 return 1;67 68 // positive / +0.0 = +Inf69 if (test__divdf3(+1.0, +0x0.0p+0, UINT64_C(0x7ff0000000000000)))70 return 1;71 // positive / -0.0 = -Inf72 if (test__divdf3(+1.0, -0x0.0p+0, UINT64_C(0xfff0000000000000)))73 return 1;74 // negative / +0.0 = -Inf75 if (test__divdf3(-1.0, +0x0.0p+0, UINT64_C(0xfff0000000000000)))76 return 1;77 // negative / -0.0 = +Inf78 if (test__divdf3(-1.0, -0x0.0p+0, UINT64_C(0x7ff0000000000000)))79 return 1;80 81 // 1/382 if (test__divdf3(1., 3., UINT64_C(0x3fd5555555555555)))83 return 1;84 // smallest normal result85 if (test__divdf3(0x1.0p-1021, 2., UINT64_C(0x10000000000000)))86 return 1;87 88 // divisor is exactly 1.089 if (test__divdf3(0x1.0p+0, 0x1.0p+0, UINT64_C(0x3ff0000000000000)))90 return 1;91 // divisor is truncated to exactly 1.0 in UQ1.3192 if (test__divdf3(0x1.0p+0, 0x1.00000001p+0, UINT64_C(0x3fefffffffe00000)))93 return 1;94 95 // smallest normal value divided by 2.096 if (test__divdf3(0x1.0p-1022, 2., UINT64_C(0x0008000000000000)))97 return 1;98 // smallest subnormal result99 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 implementation103 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 // test 1 / (1 - eps(0.5)) = 1 + eps(1)117 if (test__divdf3(1.0, 0x1.fffffffffffffp-1, UINT64_C(0x3ff0000000000001)))118 return 1;119 120 return 0;121}122