IsProcessorFeaturePresent function

Determines whether the specified processor feature is supported by the current computer.

Syntax

BOOL WINAPI IsProcessorFeaturePresent(
  _In_ DWORD ProcessorFeature
);

Parameters

ProcessorFeature [in]

The processor feature to be tested. This parameter can be one of the following values.

Value	Meaning
PF_ARM_64BIT_LOADSTORE_ATOMIC 25	The 64-bit load/store atomic instructions are available.
PF_ARM_DIVIDE_INSTRUCTION_AVAILABLE 24	The divide instructions are available.
PF_ARM_EXTERNAL_CACHE_AVAILABLE 26	The external cache is available.
PF_ARM_FMAC_INSTRUCTIONS_AVAILABLE 27	The floating-point multiply-accumulate instruction is available.
PF_ARM_VFP_32_REGISTERS_AVAILABLE 18	The VFP/Neon: 32 x 64bit register bank is present. This flag has the same meaning as PF_ARM_VFP_EXTENDED_REGISTERS.
PF_3DNOW_INSTRUCTIONS_AVAILABLE 7	The 3D-Now instruction set is available.
PF_CHANNELS_ENABLED 16	The processor channels are enabled.
PF_COMPARE_EXCHANGE_DOUBLE 2	The atomic compare and exchange operation (cmpxchg) is available.
PF_COMPARE_EXCHANGE128 14	The atomic compare and exchange 128-bit operation (cmpxchg16b) is available. Windows Server 2003 and Windows XP/2000:  This feature is not supported.
PF_COMPARE64_EXCHANGE128 15	The atomic compare 64 and exchange 128-bit operation (cmp8xchg16) is available. Windows Server 2003 and Windows XP/2000:  This feature is not supported.
PF_FASTFAIL_AVAILABLE 23	_fastfail() is available.
PF_FLOATING_POINT_EMULATED 1	Floating-point operations are emulated using a software emulator. This function returns a nonzero value if floating-point operations are emulated; otherwise, it returns zero.
PF_FLOATING_POINT_PRECISION_ERRATA 0	On a Pentium, a floating-point precision error can occur in rare circumstances.
PF_MMX_INSTRUCTIONS_AVAILABLE 3	The MMX instruction set is available.
PF_NX_ENABLED 12	Data execution prevention is enabled. Windows XP/2000:  This feature is not supported until Windows XP with SP2 and Windows Server 2003 with SP1.
PF_PAE_ENABLED 9	The processor is PAE-enabled. For more information, see Physical Address Extension. All x64 processors always return a nonzero value for this feature.
PF_RDTSC_INSTRUCTION_AVAILABLE 8	The RDTSC instruction is available.
PF_RDWRFSGSBASE_AVAILABLE 22	RDFSBASE, RDGSBASE, WRFSBASE, and WRGSBASE instructions are available.
PF_SECOND_LEVEL_ADDRESS_TRANSLATION 20	Second Level Address Translation is supported by the hardware.
PF_SSE3_INSTRUCTIONS_AVAILABLE 13	The SSE3 instruction set is available. Windows Server 2003 and Windows XP/2000:  This feature is not supported.
PF_VIRT_FIRMWARE_ENABLED 21	Virtualization is enabled in the firmware.
PF_XMMI_INSTRUCTIONS_AVAILABLE 6	The SSE instruction set is available.
PF_XMMI64_INSTRUCTIONS_AVAILABLE 10	The SSE2 instruction set is available. Windows 2000:  This feature is not supported.
PF_XSAVE_ENABLED 17	The processor implements the XSAVE and XRSTOR instructions. Windows Server 2008, Windows Vista, Windows Server 2003 and Windows XP/2000:  This feature is not supported until Windows 7 and Windows Server 2008 R2.

 

Return value

If the feature is supported, the return value is a nonzero value.

If the feature is not supported, the return value is zero.

If the HAL does not support detection of the feature, whether or not the hardware supports the feature, the return value is also zero.

Requirements

See also

System Information Functions