derek.holloway
7502bf64a4
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98 lines
3.3 KiB
C
98 lines
3.3 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_trunctfxf2
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#include "int_lib.h"
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#include <stdio.h>
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#if __LDBL_MANT_DIG__ == 64 && defined(__x86_64__) && \
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(defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__))
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#include "fp_test.h"
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COMPILER_RT_ABI long double __trunctfxf2(tf_float a);
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int test__trunctfxf2(tf_float a, uint64_t expectedHi, uint64_t expectedLo) {
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long double x = __trunctfxf2(a);
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int ret = compareResultF80(x, expectedHi, expectedLo);
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;
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if (ret) {
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printf("error in __trunctfxf2(%.20Lf) = %.20Lf, "
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"expected %.20Lf\n",
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a, x, fromRep128(expectedHi, expectedLo));
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}
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return ret;
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}
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char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};
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#endif
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int main() {
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#if __LDBL_MANT_DIG__ == 64 && defined(__x86_64__) && \
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(defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__))
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// qNaN
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if (test__trunctfxf2(makeQNaN128(), UINT64_C(0x7FFF),
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UINT64_C(0xC000000000000000)))
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return 1;
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// NaN
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if (test__trunctfxf2(makeNaN128(UINT64_C(0x810000000000)), UINT64_C(0x7FFF),
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UINT64_C(0xC080000000000000)))
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return 1;
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// inf
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if (test__trunctfxf2(makeInf128(), UINT64_C(0x7FFF),
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UINT64_C(0x8000000000000000)))
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return 1;
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// zero
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if (test__trunctfxf2(0.0Q, UINT64_C(0x0), UINT64_C(0x0)))
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return 1;
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if (test__trunctfxf2(0x1.af23456789bbaaab347645365cdep+5L, UINT64_C(0x4004),
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UINT64_C(0xd791a2b3c4ddd556)))
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return 1;
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if (test__trunctfxf2(0x1.dedafcff354b6ae9758763545432p-9L, UINT64_C(0x3ff6),
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UINT64_C(0xef6d7e7f9aa5b575)))
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return 1;
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if (test__trunctfxf2(0x1.2f34dd5f437e849b4baab754cdefp+4534L,
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UINT64_C(0x51b5), UINT64_C(0x979a6eafa1bf424e)))
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return 1;
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if (test__trunctfxf2(0x1.edcbff8ad76ab5bf46463233214fp-435L, UINT64_C(0x3e4c),
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UINT64_C(0xf6e5ffc56bb55ae0)))
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return 1;
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// Test rounding near halfway.
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tf_float halfwayPlus =
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fromRep128(UINT64_C(0x7ffa000000000000),
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((UINT64_C(1) << (112 - 63 - 1)) + UINT64_C(1)));
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if (test__trunctfxf2(halfwayPlus, UINT64_C(0x7ffa),
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UINT64_C(0x8000000000000001)))
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return 1;
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tf_float halfwayExactOdd = fromRep128(
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UINT64_C(0x7ffa000000000000),
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((UINT64_C(1) << (112 - 63)) + (UINT64_C(1) << (112 - 63 - 1))));
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if (test__trunctfxf2(halfwayExactOdd, UINT64_C(0x7ffa),
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UINT64_C(0x8000000000000002)))
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return 1;
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tf_float halfwayExactEven =
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fromRep128(UINT64_C(0x7ffa000000000000), (UINT64_C(1) << (112 - 63 - 1)));
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if (test__trunctfxf2(halfwayExactEven, UINT64_C(0x7ffa),
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UINT64_C(0x8000000000000000)))
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return 1;
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tf_float halfwayRoundingWillChangeExponent =
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fromRep128(UINT64_C(0x7ffaffffffffffff), UINT64_C(0xffff000000000001));
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if (test__trunctfxf2(halfwayRoundingWillChangeExponent, UINT64_C(0x7ffb),
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UINT64_C(0x8000000000000000)))
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return 1;
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// denormal number
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if (test__trunctfxf2(1e-4932Q, UINT64_C(0), UINT64_C(0x261247c8f29357f0)))
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return 1;
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// denormal number
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if (test__trunctfxf2(2e-4932Q, UINT64_C(0), UINT64_C(0x4c248f91e526afe0)))
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return 1;
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#else
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printf("skipped\n");
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#endif
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return 0;
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}
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