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Re: gcc-3.3 problem with reloading byte into address register onColdFire
Peter Barada <peter@baradas.org> writes:
|> >Looking at a m68k manual, I see that no member of the m68k family
|> >supports QImode moves to/from address registers. This isn't a Coldfire
|> >specific problem. If you look at output_move_qimode, it always uses a
|> >word-sized (HImode) move if the source or destination is an address
|> >register. So my initial analysis was wrong.
|>
|> According to the 68000 Programmers Reference Manual, move.b could use
|> an address register as a source operand, bot not a destination
|> operand.
There is a footnote saying "For byte size operation, address register
direct is not allowed." Experimentation confirms that.
Andreas.
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Andreas Schwab, SuSE Labs, schwab@suse.de
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