SP0/VxWorks6.9 SPE unavailable exception encountered

[skliper]

Describe the bug
Apparently VxWorks needs VX_SPE_TASK defined for tasks on a 32 bit system if any SPE instructions are inserted by the compiler. Lacking this I hit "SPE unavailable exception" from within a child task on the SP0 with VxWorks 6.9.

Side note - Turns out under certain circumstances VX_FP_TASK behaves like VX_SPE_TASK.

Flags are set here:

osal/src/os/vxworks/src/os-impl-tasks.c

Lines 132 to 139 in 2a2defb

	/* see if the user wants floating point enabled. If
	* so, then se the correct option.
	*/
	vxflags = 0;
	if (flags & OS_FP_ENABLED)
	{
	vxflags |= VX_FP_TASK;
	}

To Reproduce
Run the cfe functional test on SP0, observe the SPE unavailable exception related to the TestTblNonAppContext task started by TestTableBadContext in tbl_registration_test.c:
https://github.com/nasa/cFE/blob/64a6a59456fa9e47dc93e4bb9cecacc3d86d1862/modules/cfe_testcase/src/tbl_registration_test.c#L246-L248

Note - I'm not sure how consistent this is, since it'll only occur if SPE instructions are added by the compiler (no clue why it happened w/ this task).

Expected behavior
No exception - could be achieved by allowing additional flags to be added from the PSP build configuration?

System observed on:

• Hardware: SP0
• OS: VxWorks 6.9
• Versions Bundle main

Additional context
None

Reporter Info
Jacob Hageman - NASA/GSFC