52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
//===-- MPFRUtils.h ---------------------------------------------*- C++ -*-===//
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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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#ifndef LLVM_LIBC_UTILS_TESTUTILS_MPFRUTILS_H
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#define LLVM_LIBC_UTILS_TESTUTILS_MPFRUTILS_H
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#include <stdint.h>
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namespace __llvm_libc {
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namespace testing {
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namespace mpfr {
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struct Tolerance {
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// Number of bits used to represent the fractional
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// part of a value of type 'float'.
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static constexpr unsigned int floatPrecision = 23;
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// Number of bits used to represent the fractional
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// part of a value of type 'double'.
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static constexpr unsigned int doublePrecision = 52;
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// The base precision of the number. For example, for values of
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// type float, the base precision is the value |floatPrecision|.
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unsigned int basePrecision;
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unsigned int width; // Number of valid LSB bits in |value|.
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// The bits in the tolerance value. The tolerance value will be
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// sum(bits[width - i] * 2 ^ (- basePrecision - i)) for |i| in
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// range [1, width].
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uint32_t bits;
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};
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// Return true if |libcOutput| is within the tolerance |t| of the cos(x)
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// value as evaluated by MPFR.
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bool equalsCos(float x, float libcOutput, const Tolerance &t);
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// Return true if |libcOutput| is within the tolerance |t| of the sin(x)
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// value as evaluated by MPFR.
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bool equalsSin(float x, float libcOutput, const Tolerance &t);
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} // namespace mpfr
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} // namespace testing
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} // namespace __llvm_libc
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#endif // LLVM_LIBC_UTILS_TESTUTILS_MPFRUTILS_H
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