FPEmulator_InitContext (changes)

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FPEmulator

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» FPEmulator_InitContext

FPEmulator_InitContext

(SWI &40485)

Use

The purpose of this call is to initialise or re-initialise a floating point context.

Notes

It puts the context into a standard starting state, in which:

All floating point registers contain zeros.

The FPSR has the OFL, DVZ and IVO exception trap enable bits set. All other trap enable, system control and exception flag bits are clear.

This call may also initialise other less obvious context variables. To initialise a floating point context with other registers and/or FPSR values, use FPEmulator_InitContext and then switch to the context and load the desired values with LDF and/or WFS instructions.

Note that this call should not be made on a context that is currently active. If it is necessary to re-initialise the currently active context, make it no longer active (by using FPEmulator_ActivateContext or FPEmulator_ChangeContext), then re-initialise it, then reactivate it.

Contexts are only available from FPEmulator 4.12 and later.

See also

• Floating Point Contexts
• FPEmulator_ActivateContext
• FPEmulator_ChangeContext
• FPEmulator_InitContext