FPEmulator_ActivateContext (changes)

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FPEmulator

» SWI Calls

» FPEmulator_ActivateContext

FPEmulator_ActivateContext

(SWI &40481)

Use

The purpose of this call is to install a suitable undefined instruction handler, depending on the state of the specified context, what undefined instruction handlers are available and the hardware present.

Notes

This call also actually enables the floating point hardware if it is present and wanted; in this case, it also loads the context into the hardware.

The argument may also be zero, to indicate that the floating point system should enter the completely inactive state described under FPEmulator_ChangeContext.

You should normally use FPEmulator_ChangeContext in preference to this call.

See the notes under FPEmulator_DeactivateContext relating to restrictions on this pair of SWIs.

Contexts are only available from FPEmulator 4.12 and later.

See also

• Floating Point Contexts
• FPEmulator_ChangeContext
• FPEmulator_DeactivateContext