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VfpHandleException (Compact 2013)

  • [アーティクル]

10/16/2014

This function handles a floating-point exception that is reported by vector floating-point (VFP) hardware.

Syntax

BOOL VfpHandleException(
    ULONG fpexc,
   EXCEPTION_RECORD* pExr,
   CONTEXT* pContext,
   DWORD* pdwReserved,
   BOOL fInKMode
);

Parameters

  • fpexc
    [in] Contents of the floating-point exception register (FPEXC), represented by one or more of the following flags:

    Value

    Description

    FPEXC_EX_BIT

    Exception flag. When set, the VFP coprocessor is in the exception state.

    FPEXC_ENABLE_BIT

    VFP enable bit. When set, the VFP coprocessor is enabled.

    FPEXC_DEX_BIT

    Defined synchronous instruction exceptional flag. Set when the VFP coprocessor generates a synchronous bounce because of an attempt to execute a vector operation.

    FPEXC_FP2V_BIT

    FPINST2 instruction valid flag. Set when FPINST2 contains a valid instruction.

    FPEXC_VV_BIT

    Indicates whether the number of short vector iterations remaining is stored in FPEXC.VECITR or FPSCR.LEN.

    FPEXC_CLEAR_BITS

    FPEXC bits are cleared.
  • pContext
    [in] Pointer to an ARM-specific thread context structure.
  • pdwReserved
    [out] Reserved for future use.
  • fInKMode
    [in] Indicates whether this function is in kernel mode.

Return Value

Returns true if the exception was handled; otherwise, false.

Remarks

This function is based on the ARM VFP v2 common subarchitecture specification. If your platform uses a different subarchitecture, you might need to implement your own function to handle VFP exceptions.

See Also

Reference

Coprocessor Reference