qsimd_p.h File Reference

#include <QtCore/private/qglobal_p.h>
#include <QtCore/qsimd.h>
#include <stdatomic.h>

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Macros
#define	ALIGNMENT_PROLOGUE_16BYTES(ptr, i, length)    for (; i < static_cast<int>(qMin(static_cast<quintptr>(length), ((4 - ((reinterpret_cast<quintptr>(ptr) >> 2) & 0x3)) & 0x3))); ++i)
#define	ALIGNMENT_PROLOGUE_32BYTES(ptr, i, length)    for (; i < static_cast<int>(qMin(static_cast<quintptr>(length), ((8 - ((reinterpret_cast<quintptr>(ptr) >> 2) & 0x7)) & 0x7))); ++i)
#define	SIMD_EPILOGUE(i, length, max)    for (int _i = 0; _i < max && i < length; ++i, ++_i)
#define	QT_COMPILER_SUPPORTS(x)   (QT_COMPILER_SUPPORTS_ ## x - 0)
#define	QT_COMPILER_SUPPORTS_HERE(x)   (__ ## x ## __)
#define	QT_FUNCTION_TARGET(x)
#define	Q_ATOMIC(T)   _Atomic(T)
#define	qCpuHasFeature(feature)

Typedefs
typedef unsigned	QCpuFeatureType

Enumerations
enum	CPUFeatures

Functions
Q_CORE_EXPORT	Q_ATOMIC (QCpuFeatureType) QT_MANGLE_NAMESPACE(qt_cpu_features)[1]
Q_CORE_EXPORT uint64_t QT_MANGLE_NAMESPACE()	qDetectCpuFeatures ()
static uint64_t	qCpuFeatures ()
static void	qYieldCpu ()

Variables
static const uint64_t	qCompilerCpuFeatures = 0

Macro Definition Documentation

ALIGNMENT_PROLOGUE_16BYTES

#define ALIGNMENT_PROLOGUE_16BYTES	(		ptr,
			i,
			length
	)		for (; i < static_cast<int>(qMin(static_cast<quintptr>(length), ((4 - ((reinterpret_cast<quintptr>(ptr) >> 2) & 0x3)) & 0x3))); ++i)

Definition at line 27 of file qsimd_p.h.

ALIGNMENT_PROLOGUE_32BYTES

#define ALIGNMENT_PROLOGUE_32BYTES	(		ptr,
			i,
			length
	)		for (; i < static_cast<int>(qMin(static_cast<quintptr>(length), ((8 - ((reinterpret_cast<quintptr>(ptr) >> 2) & 0x7)) & 0x7))); ++i)

Definition at line 30 of file qsimd_p.h.

Q_ATOMIC

#define Q_ATOMIC

(

T

)

_Atomic(T)

Definition at line 350 of file qsimd_p.h.

qCpuHasFeature

#define qCpuHasFeature

(

feature

)

Value:

                                     (((qCompilerCpuFeatures & CpuFeature ## feature) == CpuFeature ## feature) \
                                     || ((qCpuFeatures() & CpuFeature ## feature) == CpuFeature ## feature))

Definition at line 378 of file qsimd_p.h.

QT_COMPILER_SUPPORTS

#define QT_COMPILER_SUPPORTS

(

x

)

(QT_COMPILER_SUPPORTS_ ## x - 0)

Definition at line 100 of file qsimd_p.h.

QT_COMPILER_SUPPORTS_HERE

#define QT_COMPILER_SUPPORTS_HERE

(

x

)

(__ ## x ## __)

Definition at line 132 of file qsimd_p.h.

QT_FUNCTION_TARGET

#define QT_FUNCTION_TARGET

(

x

)

Definition at line 133 of file qsimd_p.h.

SIMD_EPILOGUE

#define SIMD_EPILOGUE	(		i,
			length,
			max
	)		for (int _i = 0; _i < max && i < length; ++i, ++_i)

Definition at line 33 of file qsimd_p.h.

Typedef Documentation

QCpuFeatureType

typedef unsigned QCpuFeatureType

Definition at line 359 of file qsimd_p.h.

Enumeration Type Documentation

CPUFeatures

enum CPUFeatures

Definition at line 309 of file qsimd_p.h.

Function Documentation

Q_ATOMIC()

Q_CORE_EXPORT Q_ATOMIC

(

QCpuFeatureType

)

)[1]

qCpuFeatures()

static uint64_t qCpuFeatures ( )

inlinestatic

Definition at line 364 of file qsimd_p.h.

References Q_UNLIKELY, qCompilerCpuFeatures, qDetectCpuFeatures(), QT_MANGLE_NAMESPACE, and QT_SUPPORTS_INIT_PRIORITY.

Referenced by QHash< Key, T >::qHashBits().

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qDetectCpuFeatures()

Q_CORE_EXPORT uint64_t QT_MANGLE_NAMESPACE() qDetectCpuFeatures

(

)

Definition at line 566 of file qsimd.cpp.

References arraysize(), assert, detectProcessorFeatures(), features_indices, features_string, i, minFeature, Q_UINT64_C, Q_UNLIKELY, qAbort(), QT_MANGLE_NAMESPACE, SimdInitialized, str, and token.

Referenced by qCpuFeatures().

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qYieldCpu()

static void qYieldCpu ( )

inlinestatic

Definition at line 403 of file qsimd_p.h.

Referenced by QtConcurrent::ThreadEngineBarrier::acquire(), is_fatal_count_down(), QtConcurrent::ThreadEngineBarrier::release(), QtConcurrent::ThreadEngineBarrier::releaseUnlessLast(), switch_from_to(), and QtConcurrent::ThreadEngineBarrier::wait().

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Variable Documentation

qCompilerCpuFeatures

const uint64_t qCompilerCpuFeatures = 0

static

Definition at line 322 of file qsimd_p.h.

Referenced by qCpuFeatures(), and qDumpCPUFeatures().