118 lines
3.8 KiB
C
118 lines
3.8 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_divdf3
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#include "int_lib.h"
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#include <stdio.h>
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#include "fp_test.h"
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// Returns: a / b
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COMPILER_RT_ABI double __divdf3(double a, double b);
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int test__divdf3(double a, double b, uint64_t expected)
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{
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double x = __divdf3(a, b);
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int ret = compareResultD(x, expected);
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if (ret){
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printf("error in test__divdf3(%.20e, %.20e) = %.20e, "
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"expected %.20e\n", a, b, x,
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fromRep64(expected));
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}
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return ret;
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}
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int main()
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{
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// Returned NaNs are assumed to be qNaN by default
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// qNaN / any = qNaN
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if (test__divdf3(makeQNaN64(), 3., UINT64_C(0x7ff8000000000000)))
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return 1;
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// NaN / any = NaN
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if (test__divdf3(makeNaN64(UINT64_C(0x123)), 3., UINT64_C(0x7ff8000000000000)))
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return 1;
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// any / qNaN = qNaN
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if (test__divdf3(3., makeQNaN64(), UINT64_C(0x7ff8000000000000)))
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return 1;
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// any / NaN = NaN
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if (test__divdf3(3., makeNaN64(UINT64_C(0x123)), UINT64_C(0x7ff8000000000000)))
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return 1;
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// +Inf / positive = +Inf
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if (test__divdf3(makeInf64(), 3., UINT64_C(0x7ff0000000000000)))
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return 1;
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// +Inf / negative = -Inf
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if (test__divdf3(makeInf64(), -3., UINT64_C(0xfff0000000000000)))
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return 1;
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// -Inf / positive = -Inf
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if (test__divdf3(makeNegativeInf64(), 3., UINT64_C(0xfff0000000000000)))
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return 1;
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// -Inf / negative = +Inf
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if (test__divdf3(makeNegativeInf64(), -3., UINT64_C(0x7ff0000000000000)))
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return 1;
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// Inf / Inf = NaN
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if (test__divdf3(makeInf64(), makeInf64(), UINT64_C(0x7ff8000000000000)))
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return 1;
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// 0.0 / 0.0 = NaN
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if (test__divdf3(+0x0.0p+0, +0x0.0p+0, UINT64_C(0x7ff8000000000000)))
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return 1;
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// +0.0 / +Inf = +0.0
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if (test__divdf3(+0x0.0p+0, makeInf64(), UINT64_C(0x0)))
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return 1;
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// +Inf / +0.0 = +Inf
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if (test__divdf3(makeInf64(), +0x0.0p+0, UINT64_C(0x7ff0000000000000)))
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return 1;
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// positive / +0.0 = +Inf
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if (test__divdf3(+1.0, +0x0.0p+0, UINT64_C(0x7ff0000000000000)))
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return 1;
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// positive / -0.0 = -Inf
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if (test__divdf3(+1.0, -0x0.0p+0, UINT64_C(0xfff0000000000000)))
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return 1;
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// negative / +0.0 = -Inf
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if (test__divdf3(-1.0, +0x0.0p+0, UINT64_C(0xfff0000000000000)))
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return 1;
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// negative / -0.0 = +Inf
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if (test__divdf3(-1.0, -0x0.0p+0, UINT64_C(0x7ff0000000000000)))
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return 1;
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// 1/3
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if (test__divdf3(1., 3., UINT64_C(0x3fd5555555555555)))
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return 1;
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// smallest normal result
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if (test__divdf3(0x1.0p-1021, 2., UINT64_C(0x10000000000000)))
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return 1;
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// divisor is exactly 1.0
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if (test__divdf3(0x1.0p+0, 0x1.0p+0, UINT64_C(0x3ff0000000000000)))
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return 1;
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// divisor is truncated to exactly 1.0 in UQ1.31
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if (test__divdf3(0x1.0p+0, 0x1.00000001p+0, UINT64_C(0x3fefffffffe00000)))
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return 1;
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// smallest normal value divided by 2.0
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if (test__divdf3(0x1.0p-1022, 2., UINT64_C(0x0008000000000000)))
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return 1;
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// smallest subnormal result
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if (test__divdf3(0x1.0p-1022, 0x1.0p+52, UINT64_C(0x0000000000000001)))
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return 1;
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// some misc test cases obtained by fuzzing against h/w implementation
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if (test__divdf3(0x1.fdc239dd64735p-658, -0x1.fff9364c0843fp-948, UINT64_C(0xd20fdc8fc0ceffb1)))
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return 1;
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if (test__divdf3(-0x1.78abb261d47c8p+794, 0x1.fb01d537cc5aep+266, UINT64_C(0xe0e7c6148ffc23e3)))
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return 1;
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if (test__divdf3(-0x1.da7dfe6048b8bp-875, 0x1.ffc7ea3ff60a4p-610, UINT64_C(0xaf5dab1fe0269e2a)))
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return 1;
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if (test__divdf3(0x1.0p-1022, 0x1.9p+5, UINT64_C(0x000051eb851eb852)))
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return 1;
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if (test__divdf3(0x1.0p-1022, 0x1.0028p+41, UINT64_C(0x00000000000007ff)))
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return 1;
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if (test__divdf3(0x1.0p-1022, 0x1.0028p+52, UINT64_C(0x1)))
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return 1;
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return 0;
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}
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