da30197f1c
Added fuzz tests for f16sqrt, fsqrt, and hypot --------- Co-authored-by: Sriya Pratipati <sriyap@google.com>
54 lines
1.7 KiB
C++
54 lines
1.7 KiB
C++
//===-- fsqrt_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 fsqrt implementation.
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///
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//===----------------------------------------------------------------------===//
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#include "src/math/fsqrt.h"
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#include "utils/MPFRWrapper/mpfr_inc.h"
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#include <cstdint>
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#include <cstring>
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#include <iostream>
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#include <math.h>
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
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mpfr_t input;
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mpfr_t out;
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mpfr_init2(input, 53);
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mpfr_init2(out, 128);
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for (size_t i = 0; i < size / sizeof(double); ++i) {
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double x;
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std::memcpy(&x, data, sizeof(double));
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data += sizeof(double);
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// remove NaN, inf, and values outside the accepted range
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if (isnan(x) || isinf(x) || x < 0)
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continue;
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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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continue;
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mpfr_set_d(input, x, MPFR_RNDN);
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mpfr_sqrt(out, input, MPFR_RNDN);
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float to_compare = mpfr_get_flt(out, MPFR_RNDN);
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float result = LIBC_NAMESPACE::fsqrt(x);
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if (result != to_compare) {
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std::cout << std::hexfloat << "Failing input: " << x << std::endl;
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std::cout << std::hexfloat << "Failing output: " << result << std::endl;
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std::cout << std::hexfloat << "Expected: " << to_compare << std::endl;
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__builtin_trap();
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}
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}
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mpfr_clear(input);
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mpfr_clear(out);
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return 0;
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}
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