| 1 | /* $Id: copysign.cpp 96101 2022-08-07 21:46:07Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - No-CRT - copysign().
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2022 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #define IPRT_NO_CRT_FOR_3RD_PARTY
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| 32 | #include "internal/nocrt.h"
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| 33 | #include <iprt/nocrt/math.h>
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| 34 | #include <iprt/assertcompile.h>
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| 35 |
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| 36 |
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| 37 | #undef copysign
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| 38 | double RT_NOCRT(copysign)(double rdMagnitude, double rdSign)
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| 39 | {
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| 40 | AssertCompile(sizeof(rdMagnitude) == sizeof(RTFLOAT64U));
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| 41 | #ifndef RT_LITTLE_ENDIAN /* MSC outputs a lot better code for the alternative below. */
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| 42 | RTFLOAT64U uRet, uSign;
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| 43 | uSign.rd = rdSign;
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| 44 | uRet.rd = rdMagnitude;
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| 45 | uRet.s.fSign = uSign.s.fSign;
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| 46 | #else
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| 47 | RTFLOAT64U uRet;
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| 48 | uRet.u = (*(uint64_t const *)&rdMagnitude & (RT_BIT_64(63) - 1U)) | (*(uint64_t const *)&rdSign & RT_BIT_64(63));
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| 49 | #endif
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| 50 | return uRet.rd;
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| 51 | }
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| 52 | RT_ALIAS_AND_EXPORT_NOCRT_SYMBOL(copysign);
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| 53 |
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