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//===-- acos_fuzz.cpp -----------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
///
/// Fuzzing test for llvm-libc acos implementation.
///
//===----------------------------------------------------------------------===//
#include "src/math/acos.h"
#include "utils/MPFRWrapper/mpfr_inc.h"
#include <math.h>
extern "C" int LLVMFuzzerTestOneInput(double x) {
// remove NaN and inf and values outside accepted range
if (isnan(x) || isinf(x) || x > 1 || x < -1)
return 0;
// signed zeros already tested in unit tests
if (signbit(x) && x == 0.0)
return 0;
mpfr_t input;
mpfr_init2(input, 53);
mpfr_set_d(input, x, MPFR_RNDN);
int output = mpfr_acos(input, input, MPFR_RNDN);
mpfr_subnormalize(input, output, MPFR_RNDN);
double to_compare = mpfr_get_d(input, MPFR_RNDN);
double result = LIBC_NAMESPACE::acos(x);
if (result != to_compare)
__builtin_trap();
mpfr_clear(input);
return 0;
}
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