CpuId Class Reference

Detailed Description

This class is available for x86 / AMD64 systems to read and interpret information about the CPU's capabilities.

Before any of the getter functions may be called, the init() function must have been called. It will be called automatically, but for any function executing before main, you better call CpuId::init() first.

Vc users will most likely not need this class directly, but rely on the isImplementationSupported, bestImplementationSupported, extraInstructionsSupported, and currentImplementationSupported functions.

#include <Vc/cpuid.h>

Static Public Member Functions
static void	init ()
	Reads the CPU capabilities and stores them for faster subsequent access.
static ushort	cacheLineSize ()
	Return the cache line size in bits.
static ProcessorType	processorType ()
	Return the ProcessorType.
static uint	processorFamily ()
	Return the family number of the processor (vendor dependent).
static uint	processorModel ()
	Return the model number of the processor (vendor dependent).
static uint	logicalProcessors ()
	Return the number of logical processors.
static bool	isAmd ()
	Return whether the CPU vendor is AMD.
static bool	isIntel ()
	Return whether the CPU vendor is Intel.
static bool	hasSse3 ()
	Return whether the CPU supports SSE3.
static bool	hasPclmulqdq ()
	Return whether the CPU supports the PCLMULQDQ instruction.
static bool	hasMonitor ()
	Return whether the CPU supports the MONITOR/MWAIT instructions.
static bool	hasVmx ()
	Return whether the CPU supports the Virtual Machine Extensions.
static bool	hasSmx ()
	Return whether the CPU supports the Safer Mode Extensions.
static bool	hasEist ()
	Return whether the CPU supports the Enhanced Intel SpeedStep technology.
static bool	hasTm2 ()
	Return whether the CPU supports Thermal Monitor 2.
static bool	hasSsse3 ()
	Return whether the CPU supports SSSE3.
static bool	hasFma ()
	Return whether the CPU supports FMA extensions using YMM state.
static bool	hasCmpXchg16b ()
	Return whether the CPU supports CMPXCHG16B.
static bool	hasPdcm ()
	Return whether the CPU supports the Perfmon and Debug Capability.
static bool	hasDca ()
	Return whether the CPU supports Direct Cache Access: prefetch data from a memory mapped device.
static bool	hasSse41 ()
	Return whether the CPU supports SSE 4.1.
static bool	hasSse42 ()
	Return whether the CPU supports SSE 4.2.
static bool	hasMovbe ()
	Return whether the CPU supports the MOVBE instruction.
static bool	hasPopcnt ()
	Return whether the CPU supports the POPCNT instruction.
static bool	hasAes ()
	Return whether the CPU supports the AESNI instructions.
static bool	hasOsxsave ()
	Return whether the CPU and OS support the XSETBV/XGETBV instructions.
static bool	hasAvx ()
	Return whether the CPU supports AVX.
static bool	hasF16c ()
	Return whether the CPU supports 16-bit floating-point conversion instructions.
static bool	hasRdrand ()
	Return whether the CPU supports the RDRAND instruction.
static bool	hasFpu ()
	Return whether the CPU contains an x87 FPU.
static bool	hasDe ()
	Return whether the CPU contains Debugging Extensions.
static bool	hasPse ()
	Return whether the CPU contains Page Size Extensions.
static bool	hasTsc ()
	Return whether the CPU supports the RDTSC instruction.
static bool	hasMsr ()
	Return whether the CPU supports the Model Specific Registers instructions.
static bool	hasPae ()
	Return whether the CPU supports the Physical Address Extension.
static bool	hasCx8 ()
	Return whether the CPU supports the CMPXCHG8B instruction.
static bool	hasMtrr ()
	Return whether the CPU supports Memory Type Range Registers.
static bool	hasCmov ()
	Return whether the CPU supports CMOV instructions.
static bool	hasClfsh ()
	Return whether the CPU supports the CLFLUSH instruction.
static bool	hasAcpi ()
	Return whether the CPU supports ACPI.
static bool	hasMmx ()
	Return whether the CPU supports MMX.
static bool	hasSse ()
	Return whether the CPU supports SSE.
static bool	hasSse2 ()
	Return whether the CPU supports SSE2.
static bool	hasSse4a ()
	Return whether the CPU supports SSE4a.
static bool	hasMisAlignSse ()
	Return whether the CPU supports misaligned SSE instructions.
static bool	hasAmdPrefetch ()
	Return whether the CPU supports the AMD prefetchw instruction.
static bool	hasXop ()
	Return whether the CPU supports the XOP instructions.
static bool	hasFma4 ()
	Return whether the CPU supports the FMA4 instructions.
static bool	hasRdtscp ()
	Return whether the CPU supports the RDTSCP instruction.
static uint	L1Instruction ()
	Return the size of the L1 instruction cache.
static uint	L1Data ()
	Return the size of the L1 data cache.
static uint	L2Data ()
	Return the size of the L2 cache.
static uint	L3Data ()
	Return the size of the L3 cache.

Member Function Documentation

static void init ( )

static

Reads the CPU capabilities and stores them for faster subsequent access.

Will be executed automatically before main, but not necessarily before other functions executing before main.