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these are not public interfaces and do not match the public function,
but delegate argument checking to it.
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Some PowerPC CPUs (e.g. Freescale MPC85xx) have a completely different
instruction set for floating point operations (SPE).
Executing regular PowerPC floating point instructions results in
"Illegal instruction" errors.
Make it possible to run these devices in soft-float mode.
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there is no non-dot version of the andis instruction, but there's no
harm in updating the flags anyway, so just use the dot version.
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fesetround.c is a wrapper to do the arch independent argument
check (on archs where rounding mode is not stored in 2 bits
__fesetround still has to check its arguments)
on powerpc fe*except functions do not accept the extra invalid
flags of its fpscr register
the useless FENV_ACCESS pragma was removed from feupdateenv
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based on code sent to the mailing list by nsz, with minor changes.
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