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//===-- sincos_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 sincos implementation.
///
//===----------------------------------------------------------------------===//
#include "src/math/sincos.h"
#include "utils/MPFRWrapper/mpfr_inc.h"
#include <cstdint>
#include <cstring>
#include <iostream>
#include <math.h>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
mpfr_t input;
mpfr_t sin_x;
mpfr_t cos_x;
mpfr_init2(input, 53);
mpfr_init2(sin_x, 53);
mpfr_init2(cos_x, 53);
for (size_t i = 0; i < size / sizeof(double); ++i) {
double x;
std::memcpy(&x, data, sizeof(double));
data += sizeof(double);
// remove NaN and inf as preconditions
if (isnan(x) || isinf(x))
continue;
// signed zeros already tested in unit tests
if (signbit(x) && x == 0.0)
continue;
mpfr_set_d(input, x, MPFR_RNDN);
int output = mpfr_sin_cos(sin_x, cos_x, input, MPFR_RNDN);
mpfr_subnormalize(sin_x, output, MPFR_RNDN);
mpfr_subnormalize(cos_x, output, MPFR_RNDN);
double to_compare_sin = mpfr_get_d(sin_x, MPFR_RNDN);
double to_compare_cos = mpfr_get_d(cos_x, MPFR_RNDN);
double sin_res, cos_res;
LIBC_NAMESPACE::sincos(x, &sin_res, &cos_res);
if (sin_res != to_compare_sin || cos_res != to_compare_cos) {
std::cout << std::hexfloat << "Failing input: " << x << std::endl;
std::cout << std::hexfloat << "Failing sin output: " << sin_res
<< std::endl;
std::cout << std::hexfloat << "Expected sin: " << to_compare_sin
<< std::endl;
std::cout << std::hexfloat << "Failing cos output: " << cos_res
<< std::endl;
std::cout << std::hexfloat << "Expected cos: " << to_compare_cos
<< std::endl;
__builtin_trap();
}
}
mpfr_clear(input);
mpfr_clear(sin_x);
mpfr_clear(cos_x);
return 0;
}
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