[Bug target/88952] The asm operator modifiers for rs6000 should be documented like they are for x86

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88952

--- Comment #11 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Christopher Leonard from comment #10)
> Getting contradictory statements now:
> >reg:reg+1 maps to lo:hi on x86.
> >On x86, we don't allow register pairs in asm at all.
> 
> Not allowing, or printing a warning, is much better behavior than what I
> have been getting on PPC.

Ah, sorry - x86 emits a warning.