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OEMIsVFPFeaturePresent (Compact 2013)

  • Artículo

10/16/2014

This function queries the OEM adaptation layer (OAL) for information about vector floating-point (VFP) hardware.

Syntax

BOOL OEMIsVFPFeaturePresent(DWORD dwProcessorFeature);

Parameters

  • dwProcessorFeature
    Specifies the flag for the feature that you want to verify support for.

    The following table shows the flags for VFP processor features.

    Flag

    Description

    PF_ARM_NEON

    NEON Single Instruction Multiple Data (SIMD) hardware

    PF_ARM_NEON_HALF_PRECISION

    NEON support for half-precision floating-point values

    PF_ARM_NEON_LOAD_STORE

    NEON support for SIMD loads and stores

    PF_ARM_NEON_SINGLE_PRECISION

    NEON support for 32-bit floating-point (float32) operations

    PF_ARM_VFP_ALL_ROUNDING_MODES

    Supports all IEEE rounding modes.

    PF_ARM_VFP_DENORMALS

    Hardware support for denormalized number arithmetic

    PF_ARM_VFP_DIVIDE

    Divide operations implemented in hardware

    PF_ARM_VFP_DOUBLE_PRECISION

    VFP hardware support for 64-bit floating-point (float64) values

    PF_ARM_VFP_EXTENDED_REGISTERS

    For VFP and NEON, 32x64-bit register bank

    PF_ARM_VFP_FP_EXCEPTIONS

    Support for trapped exceptions

    PF_ARM_VFP_HALF_PRECISION

    Support for half-precision floating-point values

    PF_ARM_VFP_HARDWARE

    Any VFP hardware implementation

    PF_ARM_VFP_SHORT_VECTORS

    Support for short vector operations

    PF_ARM_VFP_SINGLE_PRECISION

    VFP hardware support for 32-bit floating-point (float32) values

    PF_ARM_VFP_SQUARE_ROOT

    Square root implemented in hardware

    PF_ARM_VFP_SUPPORT

    OS support for VFP (including OS VFP emulation; use PF_ARM_VFP_HARDWARE to query for hardware)

    PF_ARM_VFP_V1

    VFPv1 hardware

    PF_ARM_VFP_V2

    VFPv2 hardware

    PF_ARM_VFP_V3

    VFPv3 hardware

Return Value

Returns true if the feature is present; otherwise, returns false.

Remarks

You use this function on ARM processors that support VFP. If you implement OEMIsVFPFeaturePresent, set the pfnIsVFPFeaturePresent member of OEMGLOBAL to point to this function.

If you implement OEMIsVFPFeaturePresent, it will be called by IsProcessorFeaturePresent for ARM processors when neither IsProcessorFeaturePresent nor OEMIsProcessorFeaturePresent recognize the dwProcessorFeature value.

Requirements

Header

Developer Implemented

Library

OEMMain.lib or OEMMain_StaticKITL.lib

See Also

Reference

Optional OAL Functions
OEMIsProcessorFeaturePresent

Other Resources

IsProcessorFeaturePresent