Quelle cpuid.hxx Sprache: C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
*/

#pragma once

#include <sal/config.h>
#include <tools/toolsdllapi.h>
#include <o3tl/typed_flags_set.hxx>
#include <rtl/ustring.hxx>

/*

Do NOT include this header in source files compiled with CPU-specific code.
TODO: For the header to be safe that way, it should be free of any templates
or inline functions, otherwise their possibly emitted copies compiled
with the CPU-specific instructions might be chosen by the linker as the copy
to keep.

Also see the note at the top of simdsupport.hxx .

*/

namespace cpuid {

enum class InstructionSetFlags
{
    NONE  = 0x00,
    HYPER = 0x01,
    SSE2  = 0x02,
    SSSE3 = 0x04,
    SSE41 = 0x08,
    SSE42 = 0x10,
    AVX   = 0x20,
    AVX2  = 0x40,
    AVX512F = 0x80
};

} // end cpuid

namespace o3tl {
    template<> struct typed_flags<cpuid::InstructionSetFlags> : is_typed_flags<cpuid::InstructionSetFlags, 0x0ff> {};
}

namespace cpuid {

/** Get supported instruction set flags determined at runtime by probing the CPU.
*/
TOOLS_DLLPUBLIC InstructionSetFlags getCpuInstructionSetFlags();

/** Check if a certain instruction set is supported by the CPU at runtime.
*/
TOOLS_DLLPUBLIC bool isCpuInstructionSetSupported(InstructionSetFlags eInstructions);

/** Returns a string of supported instructions.
*/
TOOLS_DLLPUBLIC OUString instructionSetSupportedString();

/** Check if SSE2 is supported by the CPU
*/
inline bool hasSSE2()
{
    return isCpuInstructionSetSupported(InstructionSetFlags::SSE2);
}

/** Check if SSSE3 is supported by the CPU
*/
inline bool hasSSSE3()
{
    return isCpuInstructionSetSupported(InstructionSetFlags::SSSE3);
}

/** Check if AVX is supported by the CPU
*/
inline bool hasAVX()
{
    return isCpuInstructionSetSupported(InstructionSetFlags::AVX);
}

/** Check if AVX2 is supported by the CPU
*/
inline bool hasAVX2()
{
    return isCpuInstructionSetSupported(InstructionSetFlags::AVX2);
}

/** Check if AVX512F is supported by the CPU
*/
inline bool hasAVX512F()
{
    return isCpuInstructionSetSupported(InstructionSetFlags::AVX512F);
}

/** Check if Hyper Threading is supported
*/
inline bool hasHyperThreading()
{
    return isCpuInstructionSetSupported(InstructionSetFlags::HYPER);
}

} // end cpuid

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */

quality100%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.