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Diffstat (limited to 'rcc/lib/Support/MathExtras.cc')
| -rw-r--r-- | rcc/lib/Support/MathExtras.cc | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/rcc/lib/Support/MathExtras.cc b/rcc/lib/Support/MathExtras.cc deleted file mode 100644 index f0db3a4..0000000 --- a/rcc/lib/Support/MathExtras.cc +++ /dev/null @@ -1,97 +0,0 @@ -/* - RCC-Project - - Copyright (C) 2026 Richard Qin - - This file is part of RCC-Project. - - RCC-Project is free software; you can redistribute it and/or modify it under - the terms of the GNU General Public License as published by the Free - Software Foundation; either version 3 of the License, or (at your option) any - later version. - - RCC-Project is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - RCC-Project; see the file COPYING. If not see - <http://www.gnu.org/licenses/>. -*/ - -//===-- MathExtras.cpp - Implement the MathExtras header --------------===// -// -// 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 -// -//===----------------------------------------------------------------------===// -// -// This file implements the MathExtras.h header -// -//===----------------------------------------------------------------------===// - -#include "rcc/Support/MathExtras.h" - -#ifdef _MSC_VER -#include <limits> -#else -#include <cmath> -#endif - -namespace rcc -{ - -#if defined(_MSC_VER) -// Visual Studio defines the HUGE_VAL class of macros using purposeful -// constant arithmetic overflow, which it then warns on when encountered. -const float huge_valf = std::numeric_limits<float>::infinity (); -#else -const float huge_valf = HUGE_VALF; -#endif - -/// Returns the number of digits in the given integer. -int -NumDigitsBase10 (uint64_t X) -{ - static constexpr struct ConstexprData - { - uint8_t AtLeast[65] = {}; - uint64_t Boundaries[20] = {}; - static constexpr int - NumDigitsConstexpr (uint64_t N) - { - int res = 1; - while (N >= 10) - { - res++; - N /= 10; - } - return res; - } - constexpr ConstexprData () - { - uint64_t Val = ~0ull; - for (uint64_t i = 0; i <= 64; i++) - { - uint64_t Digits = NumDigitsConstexpr (Val) - 1; - AtLeast[i] = Digits; - Val >>= 1; - } - // Special case because X=0 should return 1 and not 0 - Boundaries[0] = 0; - Val = 10; - for (uint64_t i = 1; i < 20; i++) - { - Boundaries[i] = Val; - Val *= 10; - } - } - } Data; - - uint64_t Base2 = X ? std::countl_zero (X) : 64; - uint64_t Digits = Data.AtLeast[Base2]; - return Digits + (X >= Data.Boundaries[Digits]); -} - -} // namespace rcc |
