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76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*
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* Copyright (c) 2014, 2025, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#ifndef SHARE_RUNTIME_SHAREDRUNTIMEMATH_HPP
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#define SHARE_RUNTIME_SHAREDRUNTIMEMATH_HPP
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#include <math.h>
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// Used to access the lower/higher 32 bits of a double
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typedef union {
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double d;
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struct {
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#ifdef VM_LITTLE_ENDIAN
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int lo;
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int hi;
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#else
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int hi;
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int lo;
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#endif
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} split;
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} DoubleIntConv;
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static inline int high(double d) {
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DoubleIntConv x;
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x.d = d;
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return x.split.hi;
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}
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static inline int low(double d) {
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DoubleIntConv x;
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x.d = d;
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return x.split.lo;
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}
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static inline void set_high(double* d, int high) {
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DoubleIntConv conv;
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conv.d = *d;
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conv.split.hi = high;
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*d = conv.d;
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}
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static inline void set_low(double* d, int low) {
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DoubleIntConv conv;
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conv.d = *d;
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conv.split.lo = low;
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*d = conv.d;
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}
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static const double
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two54 = 1.80143985094819840000e+16, /* 0x43500000, 0x00000000 */
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hugeX = 1.0e+300,
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tiny = 1.0e-300;
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#endif // SHARE_RUNTIME_SHAREDRUNTIMEMATH_HPP
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