a9d8843d71
created fuzz tests for acos and atan --------- Co-authored-by: Sriya Pratipati <sriyap@google.com>
39 lines
1.1 KiB
C++
39 lines
1.1 KiB
C++
//===-- atan_fuzz.cpp -----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// Fuzzing test for llvm-libc atan implementation.
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///
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//===----------------------------------------------------------------------===//
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#include "src/math/atan.h"
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#include "utils/MPFRWrapper/mpfr_inc.h"
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#include <math.h>
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extern "C" int LLVMFuzzerTestOneInput(double x) {
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// remove NaN and inf
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if (isnan(x) || isinf(x))
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return 0;
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// signed zeros already tested in unit tests
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if (signbit(x) && x == 0.0)
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return 0;
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mpfr_t input;
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mpfr_init2(input, 53);
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mpfr_set_d(input, x, MPFR_RNDN);
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int output = mpfr_atan(input, input, MPFR_RNDN);
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mpfr_subnormalize(input, output, MPFR_RNDN);
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double to_compare = mpfr_get_d(input, MPFR_RNDN);
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double result = LIBC_NAMESPACE::atan(x);
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if (result != to_compare)
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__builtin_trap();
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mpfr_clear(input);
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return 0;
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}
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